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initial commit for 0.5 release

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This commit is contained in:
Brad Rydzewski 2016-05-03 16:17:16 -07:00
parent d4fe469843
commit 5825a3d797
24 changed files with 3201 additions and 421 deletions
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29
.drone.yml
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@ -1,12 +1,13 @@
build:
image: golang:1.5
environment:
- CGO_ENABLED=0
commands:
- make deps
- make vet
- make build
- make test
test:
image: golang:1.5
environment:
- CGO_ENABLED=0
- GO15VENDOREXPERIMENT=1
commands:
- go vet
- go test -cover -coverprofile=coverage.out
- go build -ldflags "-s -w -X main.build=$DRONE_BUILD_NUMBER"
publish:
coverage:
@ -16,24 +17,16 @@ publish:
username: $$DOCKER_USER
password: $$DOCKER_PASS
email: $$DOCKER_EMAIL
repo: plugins/drone-docker
repo: plugins/docker
tag: latest
when:
branch: master
docker:
username: $$DOCKER_USER
password: $$DOCKER_PASS
email: $$DOCKER_EMAIL
repo: plugins/drone-docker
tag: develop
when:
branch: develop
plugin:
name: Docker
desc: Build and publish images to a Docker registry
type: publish
image: plugins/drone-docker
image: plugins/docker
labels:
- docker
- image

3
.gitignore vendored
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@ -22,5 +22,6 @@ _testmain.go
*.exe
*.test
*.prof
.env
drone-docker
drone-docker

2
Dockerfile
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@ -1,6 +1,6 @@
# Docker image for the docker plugin
#
# docker build --rm=true -t plugins/drone-docker .
# docker build --rm=true -t plugins/docker .
FROM rancher/docker:v1.10.2

32
Makefile
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@ -1,32 +0,0 @@
.PHONY: clean deps fmt vet test docker
EXECUTABLE ?= drone-docker
IMAGE ?= plugins/$(EXECUTABLE)
CI_BUILD_NUMBER ?= 0
LDFLAGS = -X "main.buildDate=$(shell date -u '+%Y-%m-%d %H:%M:%S %Z')"
PACKAGES = $(shell go list ./... | grep -v /vendor/)
clean:
go clean -i ./...
deps:
go get -t ./...
fmt:
go fmt $(PACKAGES)
vet:
go vet $(PACKAGES)
test:
@for PKG in $(PACKAGES); do go test -cover -coverprofile $$GOPATH/src/$$PKG/coverage.out $$PKG || exit 1; done;
docker:
GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags '-s -w $(LDFLAGS)'
docker build --rm -t $(IMAGE) .
$(EXECUTABLE): $(wildcard *.go)
go build -ldflags '-s -w $(LDFLAGS)'
build: $(EXECUTABLE)

78
README.md
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@ -1,57 +1,43 @@
# drone-docker
# drone-git
[![Build Status](http://beta.drone.io/api/badges/drone-plugins/drone-docker/status.svg)](http://beta.drone.io/drone-plugins/drone-docker)
[![Coverage Status](https://aircover.co/badges/drone-plugins/drone-docker/coverage.svg)](https://aircover.co/drone-plugins/drone-docker)
[![](https://badge.imagelayers.io/plugins/drone-docker:latest.svg)](https://imagelayers.io/?images=plugins/drone-docker:latest 'Get your own badge on imagelayers.io')
Drone plugin to build and publish Docker images to a container registry. For the usage information and a listing of the available options please take a look at [the docs](DOCS.md).
Drone plugin to build and publish images to a Docker registry
## Build
Build the binary with the following commands:
```
export GO15VENDOREXPERIMENT=1
go build
go test
```
## Docker
Build the container using `make`:
Build the docker image with the following commands:
```
make deps docker
export GO15VENDOREXPERIMENT=1
GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -a -tags netgo
```
### Example
Please note incorrectly building the image for the correct x64 linux and with GCO disabled will result in an error when running the Docker image:
```sh
docker run -i --privileged -v $(pwd):/drone/src plugins/drone-docker <<EOF
{
"repo": {
"clone_url": "git://github.com/drone/drone",
"owner": "drone",
"name": "drone",
"full_name": "drone/drone"
},
"system": {
"link_url": "https://beta.drone.io"
},
"build": {
"number": 22,
"status": "success",
"started_at": 1421029603,
"finished_at": 1421029813,
"message": "Update the Readme",
"author": "johnsmith",
"author_email": "john.smith@gmail.com"
"event": "push",
"branch": "master",
"commit": "436b7a6e2abaddfd35740527353e78a227ddcb2c",
"ref": "refs/heads/master"
},
"workspace": {
"root": "/drone/src",
"path": "/drone/src/github.com/drone/drone"
},
"vargs": {
"username": "kevinbacon",
"password": "pa$$word",
"email": "foo@bar.com",
"repo": "foo/bar",
"storage_driver": "aufs"
}
}
EOF
```
docker: Error response from daemon: Container command
'/go/bin/drone-docker' not found or does not exist..
```
## Usage
Build and publish from your current working directory:
```
docker run --rm \
-e PLUGIN_TAG=latest \
-e PLUGIN_REPO=octocat/hello-world \
-e DRONE_COMMIT_SHA=d8dbe4d94f15fe89232e0402c6e8a0ddf21af3ab \
-v $(pwd)/$(pwd)
-w $(pwd)
plugins/docker --dry-run
```

454
main.go
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@ -1,305 +1,203 @@
package main
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strings"
"time"
"github.com/drone/drone-plugin-go/plugin"
"github.com/codegangsta/cli"
_ "github.com/joho/godotenv/autoload"
)
type Save struct {
// Absolute or relative path
File string `json:"destination"`
// Only save specified tags (optional)
Tags StrSlice `json:"tag"`
}
// build number set at compile-time
var version string
type Docker struct {
Storage string `json:"storage_driver"`
Registry string `json:"registry"`
Mirror string `json:"mirror"`
Insecure bool `json:"insecure"`
Username string `json:"username"`
Password string `json:"password"`
Email string `json:"email"`
Auth string `json:"auth"`
Repo string `json:"repo"`
ForceTag bool `json:"force_tag"`
Tag StrSlice `json:"tag"`
File string `json:"file"`
Context string `json:"context"`
Bip string `json:"bip"`
Dns []string `json:"dns"`
Load string `json:"load"`
Save Save `json:"save"`
BuildArgs []string `json:"build_args"`
}
var (
buildDate string
)
// default docker registry
const defaultRegistry = "https://index.docker.io/v1/"
func main() {
fmt.Printf("Drone Docker Plugin built at %s\n", buildDate)
app := cli.NewApp()
app.Name = "my plugin"
app.Usage = "my plugin usage"
app.Action = run
app.Version = version
app.Flags = []cli.Flag{
workspace := plugin.Workspace{}
build := plugin.Build{}
vargs := Docker{}
cli.BoolFlag{
Name: "dry-run",
Usage: "dry run disables docker push",
EnvVar: "PLUGIN_DRY_RUN",
},
plugin.Param("workspace", &workspace)
plugin.Param("build", &build)
plugin.Param("vargs", &vargs)
plugin.MustParse()
cli.StringFlag{
Name: "commit.sha",
Usage: "git commit sha",
EnvVar: "DRONE_COMMIT_SHA",
},
// in case someone uses the shorthand repository name
// with a custom registry, we should concatinate so that
// we have the fully qualified image name.
if strings.Count(vargs.Repo, "/") <= 1 && len(vargs.Registry) != 0 && !strings.HasPrefix(vargs.Repo, vargs.Registry) {
vargs.Repo = fmt.Sprintf("%s/%s", vargs.Registry, vargs.Repo)
// daemon parameters
cli.StringFlag{
Name: "daemon.mirror",
Usage: "docker daemon registry mirror",
EnvVar: "PLUGIN_REGISTRY",
},
cli.StringFlag{
Name: "daemon.storage-driver",
Usage: "docker daemon storage driver",
EnvVar: "PLUGIN_STORAGE_DRIVER",
},
cli.StringFlag{
Name: "daemon.storage-driver",
Usage: "docker daemon storage path",
Value: "/tmp/docker",
EnvVar: "PLUGIN_STORAGE_PATH",
},
cli.StringFlag{
Name: "daemon.bip",
Usage: "docker daemon bride ip address",
EnvVar: "PLUGIN_BIP",
},
cli.StringSliceFlag{
Name: "daemon.dns",
Usage: "docker daemon dns server",
EnvVar: "PLUGIN_DNS",
},
cli.BoolFlag{
Name: "daemon.insecure",
Usage: "docker daemon allows insecure registries",
EnvVar: "PLUGIN_INSECURE",
},
cli.BoolFlag{
Name: "daemon.debug",
Usage: "docker daemon executes in debug mode",
EnvVar: "PLUGIN_DEBUG",
},
cli.BoolFlag{
Name: "daemon.debug",
Usage: "docker daemon executes in debug mode",
EnvVar: "PLUGIN_DEBUG,DOCKER_LAUNCH_DEBUG",
},
cli.BoolFlag{
Name: "daemon.off",
Usage: "docker daemon executes in debug mode",
EnvVar: "PLUGIN_DAEMON_OFF",
},
// build parameters
cli.StringFlag{
Name: "dockerfile",
Usage: "build dockerfile",
Value: "Dockerfile",
EnvVar: "PLUGIN_DOCKERFILE",
},
cli.StringFlag{
Name: "context",
Usage: "build context",
Value: ".",
EnvVar: "PLUGIN_CONTEXT",
},
cli.StringSliceFlag{
Name: "tags",
Usage: "build tags",
Value: &cli.StringSlice{"latest"},
EnvVar: "PLUGIN_TAG,PLUGIN_TAGS",
},
cli.BoolFlag{
Name: "force",
Usage: "build tags are forced",
EnvVar: "PLUGIN_FORCE",
},
cli.StringSliceFlag{
Name: "args",
Usage: "build args",
EnvVar: "PLUGIN_ARGS",
},
cli.StringFlag{
Name: "repo",
Usage: "docker repository",
EnvVar: "PLUGIN_REPO",
},
// secret variables
cli.StringFlag{
Name: "docker.registry",
Usage: "docker username",
Value: defaultRegistry,
EnvVar: "DOCKER_REGISTRY,PLUGIN_REGISTRY",
},
cli.StringFlag{
Name: "docker.username",
Usage: "docker username",
EnvVar: "DOCKER_USERNAME,PLUGIN_USERNAME",
},
cli.StringFlag{
Name: "docker.password",
Usage: "docker password",
EnvVar: "DOCKER_PASSWORD,PLUGIN_PASSWORD",
},
cli.StringFlag{
Name: "docker.email",
Usage: "docker email",
EnvVar: "DOCKER_EMAIL,PLUGIN_EMAIL",
},
}
// Set the Registry value
if len(vargs.Registry) == 0 {
vargs.Registry = "https://index.docker.io/v1/"
}
// Set the Dockerfile name
if len(vargs.File) == 0 {
vargs.File = "Dockerfile"
}
// Set the Context value
if len(vargs.Context) == 0 {
vargs.Context = "."
}
// Set the Tag value
if vargs.Tag.Len() == 0 {
vargs.Tag = StrSlice{[]string{"latest"}}
}
// Get absolute path for 'save' file
if len(vargs.Save.File) != 0 {
if !filepath.IsAbs(vargs.Save.File) {
vargs.Save.File = filepath.Join(workspace.Path, vargs.Save.File)
}
}
// Get absolute path for 'load' file
if len(vargs.Load) != 0 {
if !filepath.IsAbs(vargs.Load) {
vargs.Load = filepath.Join(workspace.Path, vargs.Load)
}
app.Run(os.Args)
}
func run(c *cli.Context) {
plugin := Plugin{
Dryrun: c.Bool("dry-run"),
Login: Login{
Registry: c.String("docker.registry"),
Username: c.String("docker.username"),
Password: c.String("docker.password"),
Email: c.String("docker.email"),
},
Build: Build{
Name: c.String("commit.sha"),
Dockerfile: c.String("dockerfile"),
Context: c.String("context"),
Tags: c.StringSlice("tags"),
Args: c.StringSlice("args"),
Repo: c.String("repo"),
Force: c.Bool("force"),
},
Daemon: Daemon{
Registry: c.String("docker.registry"),
Mirror: c.String("daemon.mirror"),
StorageDriver: c.String("daemon.storage-driver"),
StoragePath: c.String("daemon.storage-path"),
Insecure: c.Bool("daemon.insecure"),
Disabled: c.Bool("daemon.off"),
Debug: c.Bool("deamon.debug"),
Bip: c.String("daemon.bip"),
DNS: c.StringSlice("daemon.dns"),
},
}
go func() {
args := []string{"daemon", "-g", "/drone/docker"}
plugin.Dryrun = true // TODO remote this line
if len(vargs.Storage) != 0 {
args = append(args, "-s", vargs.Storage)
}
if vargs.Insecure && len(vargs.Registry) != 0 {
args = append(args, "--insecure-registry", vargs.Registry)
}
if len(vargs.Mirror) != 0 {
args = append(args, "--registry-mirror", vargs.Mirror)
}
if len(vargs.Bip) != 0 {
args = append(args, "--bip", vargs.Bip)
}
for _, value := range vargs.Dns {
args = append(args, "--dns", value)
}
cmd := exec.Command("/usr/bin/docker", args...)
if os.Getenv("DOCKER_LAUNCH_DEBUG") == "true" {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
} else {
cmd.Stdout = ioutil.Discard
cmd.Stderr = ioutil.Discard
}
trace(cmd)
cmd.Run()
}()
// ping Docker until available
for i := 0; i < 3; i++ {
cmd := exec.Command("/usr/bin/docker", "info")
cmd.Stdout = ioutil.Discard
cmd.Stderr = ioutil.Discard
err := cmd.Run()
if err == nil {
break
}
time.Sleep(time.Second * 5)
// this code attempts to normalize the repository name by appending the fully
// qualified registry name if otherwise omitted.
if plugin.Login.Registry != defaultRegistry &&
strings.HasPrefix(plugin.Build.Repo, defaultRegistry) {
plugin.Build.Repo = plugin.Login.Registry + "/" + plugin.Build.Repo
}
// Login to Docker
if len(vargs.Username) != 0 {
cmd := exec.Command("/usr/bin/docker", "login", "-u", vargs.Username, "-p", vargs.Password, "-e", vargs.Email, vargs.Registry)
cmd.Dir = workspace.Path
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
if err != nil {
fmt.Println("Login failed.")
os.Exit(1)
}
} else {
fmt.Printf("A username was not specified. Assuming anonymous publishing.\n")
}
// Docker environment info
cmd := exec.Command("/usr/bin/docker", "version")
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
trace(cmd)
cmd.Run()
cmd = exec.Command("/usr/bin/docker", "info")
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
trace(cmd)
cmd.Run()
// Restore from tarred image repository
if len(vargs.Load) != 0 {
if _, err := os.Stat(vargs.Load); err != nil {
fmt.Printf("Archive %s does not exist. Building from scratch.\n", vargs.Load)
} else {
cmd := exec.Command("/usr/bin/docker", "load", "-i", vargs.Load)
cmd.Dir = workspace.Path
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
trace(cmd)
err := cmd.Run()
if err != nil {
os.Exit(1)
}
}
}
// Build the container
name := fmt.Sprintf("%s:%s", vargs.Repo, vargs.Tag.Slice()[0])
cmd = exec.Command("/usr/bin/docker", "build", "--pull=true", "--rm=true", "-f", vargs.File, "-t", name)
for _, value := range vargs.BuildArgs {
cmd.Args = append(cmd.Args, "--build-arg", value)
}
cmd.Args = append(cmd.Args, vargs.Context)
cmd.Dir = workspace.Path
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
trace(cmd)
err := cmd.Run()
if err != nil {
if err := plugin.Exec(); err != nil {
fmt.Println(err)
os.Exit(1)
}
// Creates image tags
for _, tag := range vargs.Tag.Slice()[1:] {
name_ := fmt.Sprintf("%s:%s", vargs.Repo, tag)
cmd = exec.Command("/usr/bin/docker", "tag")
if vargs.ForceTag {
cmd.Args = append(cmd.Args, "--force=true")
}
cmd.Args = append(cmd.Args, name, name_)
cmd.Dir = workspace.Path
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
trace(cmd)
err = cmd.Run()
if err != nil {
os.Exit(1)
}
}
// Push the image and tags to the registry
for _, tag := range vargs.Tag.Slice() {
name_ := fmt.Sprintf("%s:%s", vargs.Repo, tag)
cmd = exec.Command("/usr/bin/docker", "push", name_)
cmd.Dir = workspace.Path
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
trace(cmd)
err = cmd.Run()
if err != nil {
os.Exit(1)
}
}
// Remove untagged images, if any
var outbuf bytes.Buffer
cmd = exec.Command("docker", "images", "-q", "-f", "dangling=true")
cmd.Stdout = &outbuf
cmd.Stderr = os.Stderr
trace(cmd)
err = cmd.Run()
if err != nil {
os.Exit(1)
}
if outbuf.Len() > 0 {
images := strings.Split(strings.TrimSpace(outbuf.String()), "\n")
cmd = exec.Command("docker", append([]string{"rmi"}, images...)...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
trace(cmd)
err := cmd.Run()
if err != nil {
os.Exit(1)
}
}
// Save to tarred image repository
if len(vargs.Save.File) != 0 {
// if the destination directory does not exist, create it
dir := filepath.Dir(vargs.Save.File)
os.MkdirAll(dir, 0755)
cmd = exec.Command("/usr/bin/docker", "save", "-o", vargs.Save.File)
// Limit saving to the given tags
if vargs.Save.Tags.Len() != 0 {
for _, tag := range vargs.Save.Tags.Slice() {
name_ := fmt.Sprintf("%s:%s", vargs.Repo, tag)
cmd.Args = append(cmd.Args, name_)
}
} else {
cmd.Args = append(cmd.Args, vargs.Repo)
}
cmd.Dir = workspace.Path
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
trace(cmd)
err := cmd.Run()
if err != nil {
os.Exit(1)
}
}
// TODO execute code remove dangling images
// this is problematic because we are running docker in scratch which does
// not have bash, so we need to hack something together
// docker images --quiet --filter=dangling=true | xargs --no-run-if-empty docker rmi
}
// Trace writes each command to standard error (preceded by a ‘$ ’) before it
// is executed. Used for debugging your build.
func trace(cmd *exec.Cmd) {
fmt.Println("$", strings.Join(cmd.Args, " "))
}
// authorize is a helper function that authorizes the Docker client
// by manually creating the Docker authentication file.
func authorize(d *Docker) error {
var path = "/root/.dockercfg" // TODO should probably use user.Home() for good measure
var data = fmt.Sprintf(dockerconf, d.Registry, d.Auth, d.Email)
return ioutil.WriteFile(path, []byte(data), 0644)
}
var dockerconf = `
{
"%s": {
"auth": "%s",
"email": "%s"
}
}
`
/*
cmd = exec.Command("docker", "images", "-q", "-f", "dangling=true")
cmd = exec.Command("docker", append([]string{"rmi"}, images...)...)
*/

205
plugin.go Normal file
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@ -0,0 +1,205 @@
package main
import (
"fmt"
"io/ioutil"
"os"
"os/exec"
"strings"
"time"
)
type (
// Daemon defines Docker daemon parameters.
Daemon struct {
Registry string // Docker registry
Mirror string // Docker registry mirror
Insecure bool // Docker daemon enable insecure registries
StorageDriver string // Docker daemon storage driver
StoragePath string // Docker daemon storage path
Disabled bool // DOcker daemon is disabled (already running)
Debug bool // Docker daemon started in debug mode
Bip string // Docker daemon network bridge IP address
DNS []string // Docker daemon dns server
}
// Login defines Docker login parameters.
Login struct {
Registry string // Docker registry address
Username string // Docker registry username
Password string // Docker registry password
Email string // Docker registry email
}
// Build defines Docker build parameters.
Build struct {
Name string // Docker build using default named tag
Dockerfile string // Docker build Dockerfile
Context string // Docker build context
Tags []string // Docker build tags
Args []string // Docker build args
Repo string // Docker build repository
Force bool // Docker build forces image tag creation
}
// Plugin defines the Docker plugin parameters.
Plugin struct {
Login Login // Docker login configuration
Build Build // Docker build configuration
Daemon Daemon // Docker daemon configuration
Dryrun bool // Docker push is skipped
}
)
// Exec executes the plugin step
func (p Plugin) Exec() error {
// start the Docker daemon server
if !p.Daemon.Disabled {
cmd := commandDaemon(p.Daemon)
if p.Daemon.Debug {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
} else {
cmd.Stdout = ioutil.Discard
cmd.Stderr = ioutil.Discard
}
go func() {
trace(cmd)
cmd.Run()
}()
}
// poll the docker daemon until it is started. This ensures the daemon is
// ready to accept connections before we proceed.
for i := 0; i < 15; i++ {
cmd := commandInfo()
err := cmd.Run()
if err == nil {
break
}
time.Sleep(time.Second * 1)
}
// login to the Docker registry
if p.Login.Password != "" {
cmd := commandLogin(p.Login)
err := cmd.Run()
if err != nil {
return fmt.Errorf("Error authenticating: %s", err)
}
} else {
fmt.Println("Registry credentials not provided. Guest mode enabled.")
}
var cmds []*exec.Cmd
cmds = append(cmds, commandVersion()) // docker version
cmds = append(cmds, commandInfo()) // docker info
cmds = append(cmds, commandBuild(p.Build)) // docker build
for _, tag := range p.Build.Tags {
cmds = append(cmds, commandTag(p.Build, tag)) // docker tag
if p.Dryrun == false {
cmds = append(cmds, commandPush(tag)) // docker push
}
}
// execute all commands in batch mode.
for _, cmd := range cmds {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
trace(cmd)
err := cmd.Run()
if err != nil {
return err
}
}
return nil
}
// helper function to create the docker login command.
func commandLogin(login Login) *exec.Cmd {
return exec.Command(
"/usr/bin/docker", "login",
"-u", login.Username,
"-p", login.Password,
"-e", login.Email,
login.Registry,
)
}
// helper function to create the docker info command.
func commandVersion() *exec.Cmd {
return exec.Command("/usr/bin/docker", "version")
}
// helper function to create the docker info command.
func commandInfo() *exec.Cmd {
return exec.Command("/usr/bin/docker", "info")
}
// helper function to create the docker build command.
func commandBuild(build Build) *exec.Cmd {
cmd := exec.Command(
"/usr/bin/docker", "build",
"--pull=true",
"--rm=true",
"-f", build.Dockerfile,
"-t", build.Name,
)
for _, arg := range build.Args {
cmd.Args = append(cmd.Args, "--build-arg", arg)
}
cmd.Args = append(cmd.Args, build.Context)
return cmd
}
// helper function to create the docker tag command.
func commandTag(build Build, tag string) *exec.Cmd {
var (
force = fmt.Sprintf("--force=%v", build.Force)
from = build.Name
to = fmt.Sprintf("%s:%s", build.Repo, tag)
)
return exec.Command(
"/usr/bin/docker", "tag",
force,
from, to,
)
}
// helper function to create the docker push command.
func commandPush(tag string) *exec.Cmd {
return exec.Command("/usr/bin/docker", "push", tag)
}
// helper function to create the docker daemon command.
func commandDaemon(daemon Daemon) *exec.Cmd {
args := []string{"daemon", "-g", daemon.StoragePath}
if daemon.StorageDriver != "" {
args = append(args, "-s", daemon.StorageDriver)
}
if daemon.Insecure && daemon.Registry != "" {
args = append(args, "--insecure-registry", daemon.Registry)
}
if len(daemon.Mirror) != 0 {
args = append(args, "--registry-mirror", daemon.Mirror)
}
if len(daemon.Bip) != 0 {
args = append(args, "--bip", daemon.Bip)
}
for _, dns := range daemon.DNS {
args = append(args, "--dns", dns)
}
return exec.Command("/usr/bin/docker", args...)
}
// trace writes each command to stdout with the command wrapped in an xml
// tag so that it can be extracted and displayed in the logs.
func trace(cmd *exec.Cmd) {
fmt.Fprintf(os.Stdout, "<command>%s</command>", strings.Join(cmd.Args, " "))
}

45
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@ -1,45 +0,0 @@
package main
import "encoding/json"
// StrSlice representes a string or an array of strings.
// We need to override the json decoder to accept both options.
type StrSlice struct {
parts []string
}
// UnmarshalJSON decodes the byte slice whether it's a string or an array of strings.
// This method is needed to implement json.Unmarshaler.
func (e *StrSlice) UnmarshalJSON(b []byte) error {
if len(b) == 0 {
return nil
}
p := make([]string, 0, 1)
if err := json.Unmarshal(b, &p); err != nil {
var s string
if err := json.Unmarshal(b, &s); err != nil {
return err
}
p = append(p, s)
}
e.parts = p
return nil
}
// Len returns the number of parts of the StrSlice.
func (e *StrSlice) Len() int {
if e == nil {
return 0
}
return len(e.parts)
}
// Slice gets the parts of the StrSlice as a Slice of string.
func (e *StrSlice) Slice() []string {
if e == nil {
return nil
}
return e.parts
}

21
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@ -0,0 +1,21 @@
Copyright (C) 2013 Jeremy Saenz
All Rights Reserved.
MIT LICENSE
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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[![Coverage](http://gocover.io/_badge/github.com/codegangsta/cli?0)](http://gocover.io/github.com/codegangsta/cli)
[![Build Status](https://travis-ci.org/codegangsta/cli.svg?branch=master)](https://travis-ci.org/codegangsta/cli)
[![GoDoc](https://godoc.org/github.com/codegangsta/cli?status.svg)](https://godoc.org/github.com/codegangsta/cli)
[![codebeat](https://codebeat.co/badges/0a8f30aa-f975-404b-b878-5fab3ae1cc5f)](https://codebeat.co/projects/github-com-codegangsta-cli)
# cli.go
`cli.go` is simple, fast, and fun package for building command line apps in Go. The goal is to enable developers to write fast and distributable command line applications in an expressive way.
## Overview
Command line apps are usually so tiny that there is absolutely no reason why your code should *not* be self-documenting. Things like generating help text and parsing command flags/options should not hinder productivity when writing a command line app.
**This is where `cli.go` comes into play.** `cli.go` makes command line programming fun, organized, and expressive!
## Installation
Make sure you have a working Go environment (go 1.1+ is *required*). [See the install instructions](http://golang.org/doc/install.html).
To install `cli.go`, simply run:
```
$ go get github.com/codegangsta/cli
```
Make sure your `PATH` includes to the `$GOPATH/bin` directory so your commands can be easily used:
```
export PATH=$PATH:$GOPATH/bin
```
## Getting Started
One of the philosophies behind `cli.go` is that an API should be playful and full of discovery. So a `cli.go` app can be as little as one line of code in `main()`.
``` go
package main
import (
"os"
"github.com/codegangsta/cli"
)
func main() {
cli.NewApp().Run(os.Args)
}
```
This app will run and show help text, but is not very useful. Let's give an action to execute and some help documentation:
``` go
package main
import (
"os"
"github.com/codegangsta/cli"
)
func main() {
app := cli.NewApp()
app.Name = "boom"
app.Usage = "make an explosive entrance"
app.Action = func(c *cli.Context) {
println("boom! I say!")
}
app.Run(os.Args)
}
```
Running this already gives you a ton of functionality, plus support for things like subcommands and flags, which are covered below.
## Example
Being a programmer can be a lonely job. Thankfully by the power of automation that is not the case! Let's create a greeter app to fend off our demons of loneliness!
Start by creating a directory named `greet`, and within it, add a file, `greet.go` with the following code in it:
``` go
package main
import (
"os"
"github.com/codegangsta/cli"
)
func main() {
app := cli.NewApp()
app.Name = "greet"
app.Usage = "fight the loneliness!"
app.Action = func(c *cli.Context) {
println("Hello friend!")
}
app.Run(os.Args)
}
```
Install our command to the `$GOPATH/bin` directory:
```
$ go install
```
Finally run our new command:
```
$ greet
Hello friend!
```
`cli.go` also generates neat help text:
```
$ greet help
NAME:
greet - fight the loneliness!
USAGE:
greet [global options] command [command options] [arguments...]
VERSION:
0.0.0
COMMANDS:
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS
--version Shows version information
```
### Arguments
You can lookup arguments by calling the `Args` function on `cli.Context`.
``` go
...
app.Action = func(c *cli.Context) {
println("Hello", c.Args()[0])
}
...
```
### Flags
Setting and querying flags is simple.
``` go
...
app.Flags = []cli.Flag {
cli.StringFlag{
Name: "lang",
Value: "english",
Usage: "language for the greeting",
},
}
app.Action = func(c *cli.Context) {
name := "someone"
if c.NArg() > 0 {
name = c.Args()[0]
}
if c.String("lang") == "spanish" {
println("Hola", name)
} else {
println("Hello", name)
}
}
...
```
You can also set a destination variable for a flag, to which the content will be scanned.
``` go
...
var language string
app.Flags = []cli.Flag {
cli.StringFlag{
Name: "lang",
Value: "english",
Usage: "language for the greeting",
Destination: &language,
},
}
app.Action = func(c *cli.Context) {
name := "someone"
if c.NArg() > 0 {
name = c.Args()[0]
}
if language == "spanish" {
println("Hola", name)
} else {
println("Hello", name)
}
}
...
```
See full list of flags at http://godoc.org/github.com/codegangsta/cli
#### Alternate Names
You can set alternate (or short) names for flags by providing a comma-delimited list for the `Name`. e.g.
``` go
app.Flags = []cli.Flag {
cli.StringFlag{
Name: "lang, l",
Value: "english",
Usage: "language for the greeting",
},
}
```
That flag can then be set with `--lang spanish` or `-l spanish`. Note that giving two different forms of the same flag in the same command invocation is an error.
#### Values from the Environment
You can also have the default value set from the environment via `EnvVar`. e.g.
``` go
app.Flags = []cli.Flag {
cli.StringFlag{
Name: "lang, l",
Value: "english",
Usage: "language for the greeting",
EnvVar: "APP_LANG",
},
}
```
The `EnvVar` may also be given as a comma-delimited "cascade", where the first environment variable that resolves is used as the default.
``` go
app.Flags = []cli.Flag {
cli.StringFlag{
Name: "lang, l",
Value: "english",
Usage: "language for the greeting",
EnvVar: "LEGACY_COMPAT_LANG,APP_LANG,LANG",
},
}
```
#### Values from alternate input sources (YAML and others)
There is a separate package altsrc that adds support for getting flag values from other input sources like YAML.
In order to get values for a flag from an alternate input source the following code would be added to wrap an existing cli.Flag like below:
``` go
altsrc.NewIntFlag(cli.IntFlag{Name: "test"})
```
Initialization must also occur for these flags. Below is an example initializing getting data from a yaml file below.
``` go
command.Before = altsrc.InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
```
The code above will use the "load" string as a flag name to get the file name of a yaml file from the cli.Context.
It will then use that file name to initialize the yaml input source for any flags that are defined on that command.
As a note the "load" flag used would also have to be defined on the command flags in order for this code snipped to work.
Currently only YAML files are supported but developers can add support for other input sources by implementing the
altsrc.InputSourceContext for their given sources.
Here is a more complete sample of a command using YAML support:
``` go
command := &cli.Command{
Name: "test-cmd",
Aliases: []string{"tc"},
Usage: "this is for testing",
Description: "testing",
Action: func(c *cli.Context) {
// Action to run
},
Flags: []cli.Flag{
NewIntFlag(cli.IntFlag{Name: "test"}),
cli.StringFlag{Name: "load"}},
}
command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
err := command.Run(c)
```
### Subcommands
Subcommands can be defined for a more git-like command line app.
```go
...
app.Commands = []cli.Command{
{
Name: "add",
Aliases: []string{"a"},
Usage: "add a task to the list",
Action: func(c *cli.Context) {
println("added task: ", c.Args().First())
},
},
{
Name: "complete",
Aliases: []string{"c"},
Usage: "complete a task on the list",
Action: func(c *cli.Context) {
println("completed task: ", c.Args().First())
},
},
{
Name: "template",
Aliases: []string{"r"},
Usage: "options for task templates",
Subcommands: []cli.Command{
{
Name: "add",
Usage: "add a new template",
Action: func(c *cli.Context) {
println("new task template: ", c.Args().First())
},
},
{
Name: "remove",
Usage: "remove an existing template",
Action: func(c *cli.Context) {
println("removed task template: ", c.Args().First())
},
},
},
},
}
...
```
### Subcommands categories
For additional organization in apps that have many subcommands, you can
associate a category for each command to group them together in the help
output.
E.g.
```go
...
app.Commands = []cli.Command{
{
Name: "noop",
},
{
Name: "add",
Category: "template",
},
{
Name: "remove",
Category: "template",
},
}
...
```
Will include:
```
...
COMMANDS:
noop
Template actions:
add
remove
...
```
### Bash Completion
You can enable completion commands by setting the `EnableBashCompletion`
flag on the `App` object. By default, this setting will only auto-complete to
show an app's subcommands, but you can write your own completion methods for
the App or its subcommands.
```go
...
var tasks = []string{"cook", "clean", "laundry", "eat", "sleep", "code"}
app := cli.NewApp()
app.EnableBashCompletion = true
app.Commands = []cli.Command{
{
Name: "complete",
Aliases: []string{"c"},
Usage: "complete a task on the list",
Action: func(c *cli.Context) {
println("completed task: ", c.Args().First())
},
BashComplete: func(c *cli.Context) {
// This will complete if no args are passed
if c.NArg() > 0 {
return
}
for _, t := range tasks {
fmt.Println(t)
}
},
}
}
...
```
#### To Enable
Source the `autocomplete/bash_autocomplete` file in your `.bashrc` file while
setting the `PROG` variable to the name of your program:
`PROG=myprogram source /.../cli/autocomplete/bash_autocomplete`
#### To Distribute
Copy `autocomplete/bash_autocomplete` into `/etc/bash_completion.d/` and rename
it to the name of the program you wish to add autocomplete support for (or
automatically install it there if you are distributing a package). Don't forget
to source the file to make it active in the current shell.
```
sudo cp src/bash_autocomplete /etc/bash_completion.d/<myprogram>
source /etc/bash_completion.d/<myprogram>
```
Alternatively, you can just document that users should source the generic
`autocomplete/bash_autocomplete` in their bash configuration with `$PROG` set
to the name of their program (as above).
## Contribution Guidelines
Feel free to put up a pull request to fix a bug or maybe add a feature. I will give it a code review and make sure that it does not break backwards compatibility. If I or any other collaborators agree that it is in line with the vision of the project, we will work with you to get the code into a mergeable state and merge it into the master branch.
If you have contributed something significant to the project, I will most likely add you as a collaborator. As a collaborator you are given the ability to merge others pull requests. It is very important that new code does not break existing code, so be careful about what code you do choose to merge. If you have any questions feel free to link @codegangsta to the issue in question and we can review it together.
If you feel like you have contributed to the project but have not yet been added as a collaborator, I probably forgot to add you. Hit @codegangsta up over email and we will get it figured out.

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package cli
import (
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"sort"
"time"
)
// App is the main structure of a cli application. It is recommended that
// an app be created with the cli.NewApp() function
type App struct {
// The name of the program. Defaults to path.Base(os.Args[0])
Name string
// Full name of command for help, defaults to Name
HelpName string
// Description of the program.
Usage string
// Text to override the USAGE section of help
UsageText string
// Description of the program argument format.
ArgsUsage string
// Version of the program
Version string
// List of commands to execute
Commands []Command
// List of flags to parse
Flags []Flag
// Boolean to enable bash completion commands
EnableBashCompletion bool
// Boolean to hide built-in help command
HideHelp bool
// Boolean to hide built-in version flag and the VERSION section of help
HideVersion bool
// Populate on app startup, only gettable throught method Categories()
categories CommandCategories
// An action to execute when the bash-completion flag is set
BashComplete func(context *Context)
// An action to execute before any subcommands are run, but after the context is ready
// If a non-nil error is returned, no subcommands are run
Before func(context *Context) error
// An action to execute after any subcommands are run, but after the subcommand has finished
// It is run even if Action() panics
After func(context *Context) error
// The action to execute when no subcommands are specified
Action func(context *Context)
// Execute this function if the proper command cannot be found
CommandNotFound func(context *Context, command string)
// Execute this function, if an usage error occurs. This is useful for displaying customized usage error messages.
// This function is able to replace the original error messages.
// If this function is not set, the "Incorrect usage" is displayed and the execution is interrupted.
OnUsageError func(context *Context, err error, isSubcommand bool) error
// Compilation date
Compiled time.Time
// List of all authors who contributed
Authors []Author
// Copyright of the binary if any
Copyright string
// Name of Author (Note: Use App.Authors, this is deprecated)
Author string
// Email of Author (Note: Use App.Authors, this is deprecated)
Email string
// Writer writer to write output to
Writer io.Writer
}
// Tries to find out when this binary was compiled.
// Returns the current time if it fails to find it.
func compileTime() time.Time {
info, err := os.Stat(os.Args[0])
if err != nil {
return time.Now()
}
return info.ModTime()
}
// Creates a new cli Application with some reasonable defaults for Name, Usage, Version and Action.
func NewApp() *App {
return &App{
Name: filepath.Base(os.Args[0]),
HelpName: filepath.Base(os.Args[0]),
Usage: "A new cli application",
UsageText: "",
Version: "0.0.0",
BashComplete: DefaultAppComplete,
Action: helpCommand.Action,
Compiled: compileTime(),
Writer: os.Stdout,
}
}
// Entry point to the cli app. Parses the arguments slice and routes to the proper flag/args combination
func (a *App) Run(arguments []string) (err error) {
if a.Author != "" || a.Email != "" {
a.Authors = append(a.Authors, Author{Name: a.Author, Email: a.Email})
}
newCmds := []Command{}
for _, c := range a.Commands {
if c.HelpName == "" {
c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
}
newCmds = append(newCmds, c)
}
a.Commands = newCmds
a.categories = CommandCategories{}
for _, command := range a.Commands {
a.categories = a.categories.AddCommand(command.Category, command)
}
sort.Sort(a.categories)
// append help to commands
if a.Command(helpCommand.Name) == nil && !a.HideHelp {
a.Commands = append(a.Commands, helpCommand)
if (HelpFlag != BoolFlag{}) {
a.appendFlag(HelpFlag)
}
}
//append version/help flags
if a.EnableBashCompletion {
a.appendFlag(BashCompletionFlag)
}
if !a.HideVersion {
a.appendFlag(VersionFlag)
}
// parse flags
set := flagSet(a.Name, a.Flags)
set.SetOutput(ioutil.Discard)
err = set.Parse(arguments[1:])
nerr := normalizeFlags(a.Flags, set)
context := NewContext(a, set, nil)
if nerr != nil {
fmt.Fprintln(a.Writer, nerr)
ShowAppHelp(context)
return nerr
}
if checkCompletions(context) {
return nil
}
if err != nil {
if a.OnUsageError != nil {
err := a.OnUsageError(context, err, false)
return err
} else {
fmt.Fprintf(a.Writer, "%s\n\n", "Incorrect Usage.")
ShowAppHelp(context)
return err
}
}
if !a.HideHelp && checkHelp(context) {
ShowAppHelp(context)
return nil
}
if !a.HideVersion && checkVersion(context) {
ShowVersion(context)
return nil
}
if a.After != nil {
defer func() {
if afterErr := a.After(context); afterErr != nil {
if err != nil {
err = NewMultiError(err, afterErr)
} else {
err = afterErr
}
}
}()
}
if a.Before != nil {
err = a.Before(context)
if err != nil {
fmt.Fprintf(a.Writer, "%v\n\n", err)
ShowAppHelp(context)
return err
}
}
args := context.Args()
if args.Present() {
name := args.First()
c := a.Command(name)
if c != nil {
return c.Run(context)
}
}
// Run default Action
a.Action(context)
return nil
}
// Another entry point to the cli app, takes care of passing arguments and error handling
func (a *App) RunAndExitOnError() {
if err := a.Run(os.Args); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
// Invokes the subcommand given the context, parses ctx.Args() to generate command-specific flags
func (a *App) RunAsSubcommand(ctx *Context) (err error) {
// append help to commands
if len(a.Commands) > 0 {
if a.Command(helpCommand.Name) == nil && !a.HideHelp {
a.Commands = append(a.Commands, helpCommand)
if (HelpFlag != BoolFlag{}) {
a.appendFlag(HelpFlag)
}
}
}
newCmds := []Command{}
for _, c := range a.Commands {
if c.HelpName == "" {
c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
}
newCmds = append(newCmds, c)
}
a.Commands = newCmds
// append flags
if a.EnableBashCompletion {
a.appendFlag(BashCompletionFlag)
}
// parse flags
set := flagSet(a.Name, a.Flags)
set.SetOutput(ioutil.Discard)
err = set.Parse(ctx.Args().Tail())
nerr := normalizeFlags(a.Flags, set)
context := NewContext(a, set, ctx)
if nerr != nil {
fmt.Fprintln(a.Writer, nerr)
fmt.Fprintln(a.Writer)
if len(a.Commands) > 0 {
ShowSubcommandHelp(context)
} else {
ShowCommandHelp(ctx, context.Args().First())
}
return nerr
}
if checkCompletions(context) {
return nil
}
if err != nil {
if a.OnUsageError != nil {
err = a.OnUsageError(context, err, true)
return err
} else {
fmt.Fprintf(a.Writer, "%s\n\n", "Incorrect Usage.")
ShowSubcommandHelp(context)
return err
}
}
if len(a.Commands) > 0 {
if checkSubcommandHelp(context) {
return nil
}
} else {
if checkCommandHelp(ctx, context.Args().First()) {
return nil
}
}
if a.After != nil {
defer func() {
afterErr := a.After(context)
if afterErr != nil {
if err != nil {
err = NewMultiError(err, afterErr)
} else {
err = afterErr
}
}
}()
}
if a.Before != nil {
err := a.Before(context)
if err != nil {
return err
}
}
args := context.Args()
if args.Present() {
name := args.First()
c := a.Command(name)
if c != nil {
return c.Run(context)
}
}
// Run default Action
a.Action(context)
return nil
}
// Returns the named command on App. Returns nil if the command does not exist
func (a *App) Command(name string) *Command {
for _, c := range a.Commands {
if c.HasName(name) {
return &c
}
}
return nil
}
// Returnes the array containing all the categories with the commands they contain
func (a *App) Categories() CommandCategories {
return a.categories
}
func (a *App) hasFlag(flag Flag) bool {
for _, f := range a.Flags {
if flag == f {
return true
}
}
return false
}
func (a *App) appendFlag(flag Flag) {
if !a.hasFlag(flag) {
a.Flags = append(a.Flags, flag)
}
}
// Author represents someone who has contributed to a cli project.
type Author struct {
Name string // The Authors name
Email string // The Authors email
}
// String makes Author comply to the Stringer interface, to allow an easy print in the templating process
func (a Author) String() string {
e := ""
if a.Email != "" {
e = "<" + a.Email + "> "
}
return fmt.Sprintf("%v %v", a.Name, e)
}

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version: "{build}"
os: Windows Server 2012 R2
install:
- go version
- go env
build_script:
- cd %APPVEYOR_BUILD_FOLDER%
- go vet ./...
- go test -v ./...
test: off
deploy: off

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package cli
type CommandCategories []*CommandCategory
type CommandCategory struct {
Name string
Commands Commands
}
func (c CommandCategories) Less(i, j int) bool {
return c[i].Name < c[j].Name
}
func (c CommandCategories) Len() int {
return len(c)
}
func (c CommandCategories) Swap(i, j int) {
c[i], c[j] = c[j], c[i]
}
func (c CommandCategories) AddCommand(category string, command Command) CommandCategories {
for _, commandCategory := range c {
if commandCategory.Name == category {
commandCategory.Commands = append(commandCategory.Commands, command)
return c
}
}
return append(c, &CommandCategory{Name: category, Commands: []Command{command}})
}

40
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// Package cli provides a minimal framework for creating and organizing command line
// Go applications. cli is designed to be easy to understand and write, the most simple
// cli application can be written as follows:
// func main() {
// cli.NewApp().Run(os.Args)
// }
//
// Of course this application does not do much, so let's make this an actual application:
// func main() {
// app := cli.NewApp()
// app.Name = "greet"
// app.Usage = "say a greeting"
// app.Action = func(c *cli.Context) {
// println("Greetings")
// }
//
// app.Run(os.Args)
// }
package cli
import (
"strings"
)
type MultiError struct {
Errors []error
}
func NewMultiError(err ...error) MultiError {
return MultiError{Errors: err}
}
func (m MultiError) Error() string {
errs := make([]string, len(m.Errors))
for i, err := range m.Errors {
errs[i] = err.Error()
}
return strings.Join(errs, "\n")
}

262
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package cli
import (
"fmt"
"io/ioutil"
"sort"
"strings"
)
// Command is a subcommand for a cli.App.
type Command struct {
// The name of the command
Name string
// short name of the command. Typically one character (deprecated, use `Aliases`)
ShortName string
// A list of aliases for the command
Aliases []string
// A short description of the usage of this command
Usage string
// Custom text to show on USAGE section of help
UsageText string
// A longer explanation of how the command works
Description string
// A short description of the arguments of this command
ArgsUsage string
// The category the command is part of
Category string
// The function to call when checking for bash command completions
BashComplete func(context *Context)
// An action to execute before any sub-subcommands are run, but after the context is ready
// If a non-nil error is returned, no sub-subcommands are run
Before func(context *Context) error
// An action to execute after any subcommands are run, but before the subcommand has finished
// It is run even if Action() panics
After func(context *Context) error
// The function to call when this command is invoked
Action func(context *Context)
// Execute this function, if an usage error occurs. This is useful for displaying customized usage error messages.
// This function is able to replace the original error messages.
// If this function is not set, the "Incorrect usage" is displayed and the execution is interrupted.
OnUsageError func(context *Context, err error) error
// List of child commands
Subcommands Commands
// List of flags to parse
Flags []Flag
// Treat all flags as normal arguments if true
SkipFlagParsing bool
// Boolean to hide built-in help command
HideHelp bool
// Full name of command for help, defaults to full command name, including parent commands.
HelpName string
commandNamePath []string
}
// Returns the full name of the command.
// For subcommands this ensures that parent commands are part of the command path
func (c Command) FullName() string {
if c.commandNamePath == nil {
return c.Name
}
return strings.Join(c.commandNamePath, " ")
}
type Commands []Command
// Invokes the command given the context, parses ctx.Args() to generate command-specific flags
func (c Command) Run(ctx *Context) (err error) {
if len(c.Subcommands) > 0 {
return c.startApp(ctx)
}
if !c.HideHelp && (HelpFlag != BoolFlag{}) {
// append help to flags
c.Flags = append(
c.Flags,
HelpFlag,
)
}
if ctx.App.EnableBashCompletion {
c.Flags = append(c.Flags, BashCompletionFlag)
}
set := flagSet(c.Name, c.Flags)
set.SetOutput(ioutil.Discard)
if !c.SkipFlagParsing {
firstFlagIndex := -1
terminatorIndex := -1
for index, arg := range ctx.Args() {
if arg == "--" {
terminatorIndex = index
break
} else if arg == "-" {
// Do nothing. A dash alone is not really a flag.
continue
} else if strings.HasPrefix(arg, "-") && firstFlagIndex == -1 {
firstFlagIndex = index
}
}
if firstFlagIndex > -1 {
args := ctx.Args()
regularArgs := make([]string, len(args[1:firstFlagIndex]))
copy(regularArgs, args[1:firstFlagIndex])
var flagArgs []string
if terminatorIndex > -1 {
flagArgs = args[firstFlagIndex:terminatorIndex]
regularArgs = append(regularArgs, args[terminatorIndex:]...)
} else {
flagArgs = args[firstFlagIndex:]
}
err = set.Parse(append(flagArgs, regularArgs...))
} else {
err = set.Parse(ctx.Args().Tail())
}
} else {
if c.SkipFlagParsing {
err = set.Parse(append([]string{"--"}, ctx.Args().Tail()...))
}
}
if err != nil {
if c.OnUsageError != nil {
err := c.OnUsageError(ctx, err)
return err
} else {
fmt.Fprintln(ctx.App.Writer, "Incorrect Usage.")
fmt.Fprintln(ctx.App.Writer)
ShowCommandHelp(ctx, c.Name)
return err
}
}
nerr := normalizeFlags(c.Flags, set)
if nerr != nil {
fmt.Fprintln(ctx.App.Writer, nerr)
fmt.Fprintln(ctx.App.Writer)
ShowCommandHelp(ctx, c.Name)
return nerr
}
context := NewContext(ctx.App, set, ctx)
if checkCommandCompletions(context, c.Name) {
return nil
}
if checkCommandHelp(context, c.Name) {
return nil
}
if c.After != nil {
defer func() {
afterErr := c.After(context)
if afterErr != nil {
if err != nil {
err = NewMultiError(err, afterErr)
} else {
err = afterErr
}
}
}()
}
if c.Before != nil {
err := c.Before(context)
if err != nil {
fmt.Fprintln(ctx.App.Writer, err)
fmt.Fprintln(ctx.App.Writer)
ShowCommandHelp(ctx, c.Name)
return err
}
}
context.Command = c
c.Action(context)
return nil
}
func (c Command) Names() []string {
names := []string{c.Name}
if c.ShortName != "" {
names = append(names, c.ShortName)
}
return append(names, c.Aliases...)
}
// Returns true if Command.Name or Command.ShortName matches given name
func (c Command) HasName(name string) bool {
for _, n := range c.Names() {
if n == name {
return true
}
}
return false
}
func (c Command) startApp(ctx *Context) error {
app := NewApp()
// set the name and usage
app.Name = fmt.Sprintf("%s %s", ctx.App.Name, c.Name)
if c.HelpName == "" {
app.HelpName = c.HelpName
} else {
app.HelpName = app.Name
}
if c.Description != "" {
app.Usage = c.Description
} else {
app.Usage = c.Usage
}
// set CommandNotFound
app.CommandNotFound = ctx.App.CommandNotFound
// set the flags and commands
app.Commands = c.Subcommands
app.Flags = c.Flags
app.HideHelp = c.HideHelp
app.Version = ctx.App.Version
app.HideVersion = ctx.App.HideVersion
app.Compiled = ctx.App.Compiled
app.Author = ctx.App.Author
app.Email = ctx.App.Email
app.Writer = ctx.App.Writer
app.categories = CommandCategories{}
for _, command := range c.Subcommands {
app.categories = app.categories.AddCommand(command.Category, command)
}
sort.Sort(app.categories)
// bash completion
app.EnableBashCompletion = ctx.App.EnableBashCompletion
if c.BashComplete != nil {
app.BashComplete = c.BashComplete
}
// set the actions
app.Before = c.Before
app.After = c.After
if c.Action != nil {
app.Action = c.Action
} else {
app.Action = helpSubcommand.Action
}
for index, cc := range app.Commands {
app.Commands[index].commandNamePath = []string{c.Name, cc.Name}
}
return app.RunAsSubcommand(ctx)
}

393
vendor/github.com/codegangsta/cli/context.go generated vendored Normal file
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@ -0,0 +1,393 @@
package cli
import (
"errors"
"flag"
"strconv"
"strings"
"time"
)
// Context is a type that is passed through to
// each Handler action in a cli application. Context
// can be used to retrieve context-specific Args and
// parsed command-line options.
type Context struct {
App *App
Command Command
flagSet *flag.FlagSet
setFlags map[string]bool
globalSetFlags map[string]bool
parentContext *Context
}
// Creates a new context. For use in when invoking an App or Command action.
func NewContext(app *App, set *flag.FlagSet, parentCtx *Context) *Context {
return &Context{App: app, flagSet: set, parentContext: parentCtx}
}
// Looks up the value of a local int flag, returns 0 if no int flag exists
func (c *Context) Int(name string) int {
return lookupInt(name, c.flagSet)
}
// Looks up the value of a local time.Duration flag, returns 0 if no time.Duration flag exists
func (c *Context) Duration(name string) time.Duration {
return lookupDuration(name, c.flagSet)
}
// Looks up the value of a local float64 flag, returns 0 if no float64 flag exists
func (c *Context) Float64(name string) float64 {
return lookupFloat64(name, c.flagSet)
}
// Looks up the value of a local bool flag, returns false if no bool flag exists
func (c *Context) Bool(name string) bool {
return lookupBool(name, c.flagSet)
}
// Looks up the value of a local boolT flag, returns false if no bool flag exists
func (c *Context) BoolT(name string) bool {
return lookupBoolT(name, c.flagSet)
}
// Looks up the value of a local string flag, returns "" if no string flag exists
func (c *Context) String(name string) string {
return lookupString(name, c.flagSet)
}
// Looks up the value of a local string slice flag, returns nil if no string slice flag exists
func (c *Context) StringSlice(name string) []string {
return lookupStringSlice(name, c.flagSet)
}
// Looks up the value of a local int slice flag, returns nil if no int slice flag exists
func (c *Context) IntSlice(name string) []int {
return lookupIntSlice(name, c.flagSet)
}
// Looks up the value of a local generic flag, returns nil if no generic flag exists
func (c *Context) Generic(name string) interface{} {
return lookupGeneric(name, c.flagSet)
}
// Looks up the value of a global int flag, returns 0 if no int flag exists
func (c *Context) GlobalInt(name string) int {
if fs := lookupGlobalFlagSet(name, c); fs != nil {
return lookupInt(name, fs)
}
return 0
}
// Looks up the value of a global time.Duration flag, returns 0 if no time.Duration flag exists
func (c *Context) GlobalDuration(name string) time.Duration {
if fs := lookupGlobalFlagSet(name, c); fs != nil {
return lookupDuration(name, fs)
}
return 0
}
// Looks up the value of a global bool flag, returns false if no bool flag exists
func (c *Context) GlobalBool(name string) bool {
if fs := lookupGlobalFlagSet(name, c); fs != nil {
return lookupBool(name, fs)
}
return false
}
// Looks up the value of a global string flag, returns "" if no string flag exists
func (c *Context) GlobalString(name string) string {
if fs := lookupGlobalFlagSet(name, c); fs != nil {
return lookupString(name, fs)
}
return ""
}
// Looks up the value of a global string slice flag, returns nil if no string slice flag exists
func (c *Context) GlobalStringSlice(name string) []string {
if fs := lookupGlobalFlagSet(name, c); fs != nil {
return lookupStringSlice(name, fs)
}
return nil
}
// Looks up the value of a global int slice flag, returns nil if no int slice flag exists
func (c *Context) GlobalIntSlice(name string) []int {
if fs := lookupGlobalFlagSet(name, c); fs != nil {
return lookupIntSlice(name, fs)
}
return nil
}
// Looks up the value of a global generic flag, returns nil if no generic flag exists
func (c *Context) GlobalGeneric(name string) interface{} {
if fs := lookupGlobalFlagSet(name, c); fs != nil {
return lookupGeneric(name, fs)
}
return nil
}
// Returns the number of flags set
func (c *Context) NumFlags() int {
return c.flagSet.NFlag()
}
// Determines if the flag was actually set
func (c *Context) IsSet(name string) bool {
if c.setFlags == nil {
c.setFlags = make(map[string]bool)
c.flagSet.Visit(func(f *flag.Flag) {
c.setFlags[f.Name] = true
})
}
return c.setFlags[name] == true
}
// Determines if the global flag was actually set
func (c *Context) GlobalIsSet(name string) bool {
if c.globalSetFlags == nil {
c.globalSetFlags = make(map[string]bool)
ctx := c
if ctx.parentContext != nil {
ctx = ctx.parentContext
}
for ; ctx != nil && c.globalSetFlags[name] == false; ctx = ctx.parentContext {
ctx.flagSet.Visit(func(f *flag.Flag) {
c.globalSetFlags[f.Name] = true
})
}
}
return c.globalSetFlags[name]
}
// Returns a slice of flag names used in this context.
func (c *Context) FlagNames() (names []string) {
for _, flag := range c.Command.Flags {
name := strings.Split(flag.GetName(), ",")[0]
if name == "help" {
continue
}
names = append(names, name)
}
return
}
// Returns a slice of global flag names used by the app.
func (c *Context) GlobalFlagNames() (names []string) {
for _, flag := range c.App.Flags {
name := strings.Split(flag.GetName(), ",")[0]
if name == "help" || name == "version" {
continue
}
names = append(names, name)
}
return
}
// Returns the parent context, if any
func (c *Context) Parent() *Context {
return c.parentContext
}
type Args []string
// Returns the command line arguments associated with the context.
func (c *Context) Args() Args {
args := Args(c.flagSet.Args())
return args
}
// Returns the number of the command line arguments.
func (c *Context) NArg() int {
return len(c.Args())
}
// Returns the nth argument, or else a blank string
func (a Args) Get(n int) string {
if len(a) > n {
return a[n]
}
return ""
}
// Returns the first argument, or else a blank string
func (a Args) First() string {
return a.Get(0)
}
// Return the rest of the arguments (not the first one)
// or else an empty string slice
func (a Args) Tail() []string {
if len(a) >= 2 {
return []string(a)[1:]
}
return []string{}
}
// Checks if there are any arguments present
func (a Args) Present() bool {
return len(a) != 0
}
// Swaps arguments at the given indexes
func (a Args) Swap(from, to int) error {
if from >= len(a) || to >= len(a) {
return errors.New("index out of range")
}
a[from], a[to] = a[to], a[from]
return nil
}
func lookupGlobalFlagSet(name string, ctx *Context) *flag.FlagSet {
if ctx.parentContext != nil {
ctx = ctx.parentContext
}
for ; ctx != nil; ctx = ctx.parentContext {
if f := ctx.flagSet.Lookup(name); f != nil {
return ctx.flagSet
}
}
return nil
}
func lookupInt(name string, set *flag.FlagSet) int {
f := set.Lookup(name)
if f != nil {
val, err := strconv.Atoi(f.Value.String())
if err != nil {
return 0
}
return val
}
return 0
}
func lookupDuration(name string, set *flag.FlagSet) time.Duration {
f := set.Lookup(name)
if f != nil {
val, err := time.ParseDuration(f.Value.String())
if err == nil {
return val
}
}
return 0
}
func lookupFloat64(name string, set *flag.FlagSet) float64 {
f := set.Lookup(name)
if f != nil {
val, err := strconv.ParseFloat(f.Value.String(), 64)
if err != nil {
return 0
}
return val
}
return 0
}
func lookupString(name string, set *flag.FlagSet) string {
f := set.Lookup(name)
if f != nil {
return f.Value.String()
}
return ""
}
func lookupStringSlice(name string, set *flag.FlagSet) []string {
f := set.Lookup(name)
if f != nil {
return (f.Value.(*StringSlice)).Value()
}
return nil
}
func lookupIntSlice(name string, set *flag.FlagSet) []int {
f := set.Lookup(name)
if f != nil {
return (f.Value.(*IntSlice)).Value()
}
return nil
}
func lookupGeneric(name string, set *flag.FlagSet) interface{} {
f := set.Lookup(name)
if f != nil {
return f.Value
}
return nil
}
func lookupBool(name string, set *flag.FlagSet) bool {
f := set.Lookup(name)
if f != nil {
val, err := strconv.ParseBool(f.Value.String())
if err != nil {
return false
}
return val
}
return false
}
func lookupBoolT(name string, set *flag.FlagSet) bool {
f := set.Lookup(name)
if f != nil {
val, err := strconv.ParseBool(f.Value.String())
if err != nil {
return true
}
return val
}
return false
}
func copyFlag(name string, ff *flag.Flag, set *flag.FlagSet) {
switch ff.Value.(type) {
case *StringSlice:
default:
set.Set(name, ff.Value.String())
}
}
func normalizeFlags(flags []Flag, set *flag.FlagSet) error {
visited := make(map[string]bool)
set.Visit(func(f *flag.Flag) {
visited[f.Name] = true
})
for _, f := range flags {
parts := strings.Split(f.GetName(), ",")
if len(parts) == 1 {
continue
}
var ff *flag.Flag
for _, name := range parts {
name = strings.Trim(name, " ")
if visited[name] {
if ff != nil {
return errors.New("Cannot use two forms of the same flag: " + name + " " + ff.Name)
}
ff = set.Lookup(name)
}
}
if ff == nil {
continue
}
for _, name := range parts {
name = strings.Trim(name, " ")
if !visited[name] {
copyFlag(name, ff, set)
}
}
}
return nil
}

546
vendor/github.com/codegangsta/cli/flag.go generated vendored Normal file
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package cli
import (
"flag"
"fmt"
"os"
"runtime"
"strconv"
"strings"
"time"
)
// This flag enables bash-completion for all commands and subcommands
var BashCompletionFlag = BoolFlag{
Name: "generate-bash-completion",
}
// This flag prints the version for the application
var VersionFlag = BoolFlag{
Name: "version, v",
Usage: "print the version",
}
// This flag prints the help for all commands and subcommands
// Set to the zero value (BoolFlag{}) to disable flag -- keeps subcommand
// unless HideHelp is set to true)
var HelpFlag = BoolFlag{
Name: "help, h",
Usage: "show help",
}
// Flag is a common interface related to parsing flags in cli.
// For more advanced flag parsing techniques, it is recommended that
// this interface be implemented.
type Flag interface {
fmt.Stringer
// Apply Flag settings to the given flag set
Apply(*flag.FlagSet)
GetName() string
}
func flagSet(name string, flags []Flag) *flag.FlagSet {
set := flag.NewFlagSet(name, flag.ContinueOnError)
for _, f := range flags {
f.Apply(set)
}
return set
}
func eachName(longName string, fn func(string)) {
parts := strings.Split(longName, ",")
for _, name := range parts {
name = strings.Trim(name, " ")
fn(name)
}
}
// Generic is a generic parseable type identified by a specific flag
type Generic interface {
Set(value string) error
String() string
}
// GenericFlag is the flag type for types implementing Generic
type GenericFlag struct {
Name string
Value Generic
Usage string
EnvVar string
}
// String returns the string representation of the generic flag to display the
// help text to the user (uses the String() method of the generic flag to show
// the value)
func (f GenericFlag) String() string {
return withEnvHint(f.EnvVar, fmt.Sprintf("%s %v\t%v", prefixedNames(f.Name), f.FormatValueHelp(), f.Usage))
}
func (f GenericFlag) FormatValueHelp() string {
if f.Value == nil {
return ""
}
s := f.Value.String()
if len(s) == 0 {
return ""
}
return fmt.Sprintf("\"%s\"", s)
}
// Apply takes the flagset and calls Set on the generic flag with the value
// provided by the user for parsing by the flag
func (f GenericFlag) Apply(set *flag.FlagSet) {
val := f.Value
if f.EnvVar != "" {
for _, envVar := range strings.Split(f.EnvVar, ",") {
envVar = strings.TrimSpace(envVar)
if envVal := os.Getenv(envVar); envVal != "" {
val.Set(envVal)
break
}
}
}
eachName(f.Name, func(name string) {
set.Var(f.Value, name, f.Usage)
})
}
func (f GenericFlag) GetName() string {
return f.Name
}
// StringSlice is an opaque type for []string to satisfy flag.Value
type StringSlice []string
// Set appends the string value to the list of values
func (f *StringSlice) Set(value string) error {
*f = append(*f, value)
return nil
}
// String returns a readable representation of this value (for usage defaults)
func (f *StringSlice) String() string {
return fmt.Sprintf("%s", *f)
}
// Value returns the slice of strings set by this flag
func (f *StringSlice) Value() []string {
return *f
}
// StringSlice is a string flag that can be specified multiple times on the
// command-line
type StringSliceFlag struct {
Name string
Value *StringSlice
Usage string
EnvVar string
}
// String returns the usage
func (f StringSliceFlag) String() string {
firstName := strings.Trim(strings.Split(f.Name, ",")[0], " ")
pref := prefixFor(firstName)
return withEnvHint(f.EnvVar, fmt.Sprintf("%s [%v]\t%v", prefixedNames(f.Name), pref+firstName+" option "+pref+firstName+" option", f.Usage))
}
// Apply populates the flag given the flag set and environment
func (f StringSliceFlag) Apply(set *flag.FlagSet) {
if f.EnvVar != "" {
for _, envVar := range strings.Split(f.EnvVar, ",") {
envVar = strings.TrimSpace(envVar)
if envVal := os.Getenv(envVar); envVal != "" {
newVal := &StringSlice{}
for _, s := range strings.Split(envVal, ",") {
s = strings.TrimSpace(s)
newVal.Set(s)
}
f.Value = newVal
break
}
}
}
eachName(f.Name, func(name string) {
if f.Value == nil {
f.Value = &StringSlice{}
}
set.Var(f.Value, name, f.Usage)
})
}
func (f StringSliceFlag) GetName() string {
return f.Name
}
// StringSlice is an opaque type for []int to satisfy flag.Value
type IntSlice []int
// Set parses the value into an integer and appends it to the list of values
func (f *IntSlice) Set(value string) error {
tmp, err := strconv.Atoi(value)
if err != nil {
return err
} else {
*f = append(*f, tmp)
}
return nil
}
// String returns a readable representation of this value (for usage defaults)
func (f *IntSlice) String() string {
return fmt.Sprintf("%d", *f)
}
// Value returns the slice of ints set by this flag
func (f *IntSlice) Value() []int {
return *f
}
// IntSliceFlag is an int flag that can be specified multiple times on the
// command-line
type IntSliceFlag struct {
Name string
Value *IntSlice
Usage string
EnvVar string
}
// String returns the usage
func (f IntSliceFlag) String() string {
firstName := strings.Trim(strings.Split(f.Name, ",")[0], " ")
pref := prefixFor(firstName)
return withEnvHint(f.EnvVar, fmt.Sprintf("%s [%v]\t%v", prefixedNames(f.Name), pref+firstName+" option "+pref+firstName+" option", f.Usage))
}
// Apply populates the flag given the flag set and environment
func (f IntSliceFlag) Apply(set *flag.FlagSet) {
if f.EnvVar != "" {
for _, envVar := range strings.Split(f.EnvVar, ",") {
envVar = strings.TrimSpace(envVar)
if envVal := os.Getenv(envVar); envVal != "" {
newVal := &IntSlice{}
for _, s := range strings.Split(envVal, ",") {
s = strings.TrimSpace(s)
err := newVal.Set(s)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
}
}
f.Value = newVal
break
}
}
}
eachName(f.Name, func(name string) {
if f.Value == nil {
f.Value = &IntSlice{}
}
set.Var(f.Value, name, f.Usage)
})
}
func (f IntSliceFlag) GetName() string {
return f.Name
}
// BoolFlag is a switch that defaults to false
type BoolFlag struct {
Name string
Usage string
EnvVar string
Destination *bool
}
// String returns a readable representation of this value (for usage defaults)
func (f BoolFlag) String() string {
return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name), f.Usage))
}
// Apply populates the flag given the flag set and environment
func (f BoolFlag) Apply(set *flag.FlagSet) {
val := false
if f.EnvVar != "" {
for _, envVar := range strings.Split(f.EnvVar, ",") {
envVar = strings.TrimSpace(envVar)
if envVal := os.Getenv(envVar); envVal != "" {
envValBool, err := strconv.ParseBool(envVal)
if err == nil {
val = envValBool
}
break
}
}
}
eachName(f.Name, func(name string) {
if f.Destination != nil {
set.BoolVar(f.Destination, name, val, f.Usage)
return
}
set.Bool(name, val, f.Usage)
})
}
func (f BoolFlag) GetName() string {
return f.Name
}
// BoolTFlag this represents a boolean flag that is true by default, but can
// still be set to false by --some-flag=false
type BoolTFlag struct {
Name string
Usage string
EnvVar string
Destination *bool
}
// String returns a readable representation of this value (for usage defaults)
func (f BoolTFlag) String() string {
return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name), f.Usage))
}
// Apply populates the flag given the flag set and environment
func (f BoolTFlag) Apply(set *flag.FlagSet) {
val := true
if f.EnvVar != "" {
for _, envVar := range strings.Split(f.EnvVar, ",") {
envVar = strings.TrimSpace(envVar)
if envVal := os.Getenv(envVar); envVal != "" {
envValBool, err := strconv.ParseBool(envVal)
if err == nil {
val = envValBool
break
}
}
}
}
eachName(f.Name, func(name string) {
if f.Destination != nil {
set.BoolVar(f.Destination, name, val, f.Usage)
return
}
set.Bool(name, val, f.Usage)
})
}
func (f BoolTFlag) GetName() string {
return f.Name
}
// StringFlag represents a flag that takes as string value
type StringFlag struct {
Name string
Value string
Usage string
EnvVar string
Destination *string
}
// String returns the usage
func (f StringFlag) String() string {
return withEnvHint(f.EnvVar, fmt.Sprintf("%s %v\t%v", prefixedNames(f.Name), f.FormatValueHelp(), f.Usage))
}
func (f StringFlag) FormatValueHelp() string {
s := f.Value
if len(s) == 0 {
return ""
}
return fmt.Sprintf("\"%s\"", s)
}
// Apply populates the flag given the flag set and environment
func (f StringFlag) Apply(set *flag.FlagSet) {
if f.EnvVar != "" {
for _, envVar := range strings.Split(f.EnvVar, ",") {
envVar = strings.TrimSpace(envVar)
if envVal := os.Getenv(envVar); envVal != "" {
f.Value = envVal
break
}
}
}
eachName(f.Name, func(name string) {
if f.Destination != nil {
set.StringVar(f.Destination, name, f.Value, f.Usage)
return
}
set.String(name, f.Value, f.Usage)
})
}
func (f StringFlag) GetName() string {
return f.Name
}
// IntFlag is a flag that takes an integer
// Errors if the value provided cannot be parsed
type IntFlag struct {
Name string
Value int
Usage string
EnvVar string
Destination *int
}
// String returns the usage
func (f IntFlag) String() string {
return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage))
}
// Apply populates the flag given the flag set and environment
func (f IntFlag) Apply(set *flag.FlagSet) {
if f.EnvVar != "" {
for _, envVar := range strings.Split(f.EnvVar, ",") {
envVar = strings.TrimSpace(envVar)
if envVal := os.Getenv(envVar); envVal != "" {
envValInt, err := strconv.ParseInt(envVal, 0, 64)
if err == nil {
f.Value = int(envValInt)
break
}
}
}
}
eachName(f.Name, func(name string) {
if f.Destination != nil {
set.IntVar(f.Destination, name, f.Value, f.Usage)
return
}
set.Int(name, f.Value, f.Usage)
})
}
func (f IntFlag) GetName() string {
return f.Name
}
// DurationFlag is a flag that takes a duration specified in Go's duration
// format: https://golang.org/pkg/time/#ParseDuration
type DurationFlag struct {
Name string
Value time.Duration
Usage string
EnvVar string
Destination *time.Duration
}
// String returns a readable representation of this value (for usage defaults)
func (f DurationFlag) String() string {
return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage))
}
// Apply populates the flag given the flag set and environment
func (f DurationFlag) Apply(set *flag.FlagSet) {
if f.EnvVar != "" {
for _, envVar := range strings.Split(f.EnvVar, ",") {
envVar = strings.TrimSpace(envVar)
if envVal := os.Getenv(envVar); envVal != "" {
envValDuration, err := time.ParseDuration(envVal)
if err == nil {
f.Value = envValDuration
break
}
}
}
}
eachName(f.Name, func(name string) {
if f.Destination != nil {
set.DurationVar(f.Destination, name, f.Value, f.Usage)
return
}
set.Duration(name, f.Value, f.Usage)
})
}
func (f DurationFlag) GetName() string {
return f.Name
}
// Float64Flag is a flag that takes an float value
// Errors if the value provided cannot be parsed
type Float64Flag struct {
Name string
Value float64
Usage string
EnvVar string
Destination *float64
}
// String returns the usage
func (f Float64Flag) String() string {
return withEnvHint(f.EnvVar, fmt.Sprintf("%s \"%v\"\t%v", prefixedNames(f.Name), f.Value, f.Usage))
}
// Apply populates the flag given the flag set and environment
func (f Float64Flag) Apply(set *flag.FlagSet) {
if f.EnvVar != "" {
for _, envVar := range strings.Split(f.EnvVar, ",") {
envVar = strings.TrimSpace(envVar)
if envVal := os.Getenv(envVar); envVal != "" {
envValFloat, err := strconv.ParseFloat(envVal, 10)
if err == nil {
f.Value = float64(envValFloat)
}
}
}
}
eachName(f.Name, func(name string) {
if f.Destination != nil {
set.Float64Var(f.Destination, name, f.Value, f.Usage)
return
}
set.Float64(name, f.Value, f.Usage)
})
}
func (f Float64Flag) GetName() string {
return f.Name
}
func prefixFor(name string) (prefix string) {
if len(name) == 1 {
prefix = "-"
} else {
prefix = "--"
}
return
}
func prefixedNames(fullName string) (prefixed string) {
parts := strings.Split(fullName, ",")
for i, name := range parts {
name = strings.Trim(name, " ")
prefixed += prefixFor(name) + name
if i < len(parts)-1 {
prefixed += ", "
}
}
return
}
func withEnvHint(envVar, str string) string {
envText := ""
if envVar != "" {
prefix := "$"
suffix := ""
sep := ", $"
if runtime.GOOS == "windows" {
prefix = "%"
suffix = "%"
sep = "%, %"
}
envText = fmt.Sprintf(" [%s%s%s]", prefix, strings.Join(strings.Split(envVar, ","), sep), suffix)
}
return str + envText
}

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package cli
import (
"fmt"
"io"
"strings"
"text/tabwriter"
"text/template"
)
// The text template for the Default help topic.
// cli.go uses text/template to render templates. You can
// render custom help text by setting this variable.
var AppHelpTemplate = `NAME:
{{.Name}} - {{.Usage}}
USAGE:
{{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} {{if .Flags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}
{{if .Version}}{{if not .HideVersion}}
VERSION:
{{.Version}}
{{end}}{{end}}{{if len .Authors}}
AUTHOR(S):
{{range .Authors}}{{ . }}{{end}}
{{end}}{{if .Commands}}
COMMANDS:{{range .Categories}}{{if .Name}}
{{.Name}}{{ ":" }}{{end}}{{range .Commands}}
{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}{{end}}
{{end}}{{end}}{{if .Flags}}
GLOBAL OPTIONS:
{{range .Flags}}{{.}}
{{end}}{{end}}{{if .Copyright }}
COPYRIGHT:
{{.Copyright}}
{{end}}
`
// The text template for the command help topic.
// cli.go uses text/template to render templates. You can
// render custom help text by setting this variable.
var CommandHelpTemplate = `NAME:
{{.HelpName}} - {{.Usage}}
USAGE:
{{.HelpName}}{{if .Flags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{if .Category}}
CATEGORY:
{{.Category}}{{end}}{{if .Description}}
DESCRIPTION:
{{.Description}}{{end}}{{if .Flags}}
OPTIONS:
{{range .Flags}}{{.}}
{{end}}{{ end }}
`
// The text template for the subcommand help topic.
// cli.go uses text/template to render templates. You can
// render custom help text by setting this variable.
var SubcommandHelpTemplate = `NAME:
{{.HelpName}} - {{.Usage}}
USAGE:
{{.HelpName}} command{{if .Flags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
COMMANDS:{{range .Categories}}{{if .Name}}
{{.Name}}{{ ":" }}{{end}}{{range .Commands}}
{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}{{end}}
{{end}}{{if .Flags}}
OPTIONS:
{{range .Flags}}{{.}}
{{end}}{{end}}
`
var helpCommand = Command{
Name: "help",
Aliases: []string{"h"},
Usage: "Shows a list of commands or help for one command",
ArgsUsage: "[command]",
Action: func(c *Context) {
args := c.Args()
if args.Present() {
ShowCommandHelp(c, args.First())
} else {
ShowAppHelp(c)
}
},
}
var helpSubcommand = Command{
Name: "help",
Aliases: []string{"h"},
Usage: "Shows a list of commands or help for one command",
ArgsUsage: "[command]",
Action: func(c *Context) {
args := c.Args()
if args.Present() {
ShowCommandHelp(c, args.First())
} else {
ShowSubcommandHelp(c)
}
},
}
// Prints help for the App or Command
type helpPrinter func(w io.Writer, templ string, data interface{})
var HelpPrinter helpPrinter = printHelp
// Prints version for the App
var VersionPrinter = printVersion
func ShowAppHelp(c *Context) {
HelpPrinter(c.App.Writer, AppHelpTemplate, c.App)
}
// Prints the list of subcommands as the default app completion method
func DefaultAppComplete(c *Context) {
for _, command := range c.App.Commands {
for _, name := range command.Names() {
fmt.Fprintln(c.App.Writer, name)
}
}
}
// Prints help for the given command
func ShowCommandHelp(ctx *Context, command string) {
// show the subcommand help for a command with subcommands
if command == "" {
HelpPrinter(ctx.App.Writer, SubcommandHelpTemplate, ctx.App)
return
}
for _, c := range ctx.App.Commands {
if c.HasName(command) {
HelpPrinter(ctx.App.Writer, CommandHelpTemplate, c)
return
}
}
if ctx.App.CommandNotFound != nil {
ctx.App.CommandNotFound(ctx, command)
} else {
fmt.Fprintf(ctx.App.Writer, "No help topic for '%v'\n", command)
}
}
// Prints help for the given subcommand
func ShowSubcommandHelp(c *Context) {
ShowCommandHelp(c, c.Command.Name)
}
// Prints the version number of the App
func ShowVersion(c *Context) {
VersionPrinter(c)
}
func printVersion(c *Context) {
fmt.Fprintf(c.App.Writer, "%v version %v\n", c.App.Name, c.App.Version)
}
// Prints the lists of commands within a given context
func ShowCompletions(c *Context) {
a := c.App
if a != nil && a.BashComplete != nil {
a.BashComplete(c)
}
}
// Prints the custom completions for a given command
func ShowCommandCompletions(ctx *Context, command string) {
c := ctx.App.Command(command)
if c != nil && c.BashComplete != nil {
c.BashComplete(ctx)
}
}
func printHelp(out io.Writer, templ string, data interface{}) {
funcMap := template.FuncMap{
"join": strings.Join,
}
w := tabwriter.NewWriter(out, 0, 8, 1, '\t', 0)
t := template.Must(template.New("help").Funcs(funcMap).Parse(templ))
err := t.Execute(w, data)
if err != nil {
// If the writer is closed, t.Execute will fail, and there's nothing
// we can do to recover. We could send this to os.Stderr if we need.
return
}
w.Flush()
}
func checkVersion(c *Context) bool {
found := false
if VersionFlag.Name != "" {
eachName(VersionFlag.Name, func(name string) {
if c.GlobalBool(name) || c.Bool(name) {
found = true
}
})
}
return found
}
func checkHelp(c *Context) bool {
found := false
if HelpFlag.Name != "" {
eachName(HelpFlag.Name, func(name string) {
if c.GlobalBool(name) || c.Bool(name) {
found = true
}
})
}
return found
}
func checkCommandHelp(c *Context, name string) bool {
if c.Bool("h") || c.Bool("help") {
ShowCommandHelp(c, name)
return true
}
return false
}
func checkSubcommandHelp(c *Context) bool {
if c.GlobalBool("h") || c.GlobalBool("help") {
ShowSubcommandHelp(c)
return true
}
return false
}
func checkCompletions(c *Context) bool {
if (c.GlobalBool(BashCompletionFlag.Name) || c.Bool(BashCompletionFlag.Name)) && c.App.EnableBashCompletion {
ShowCompletions(c)
return true
}
return false
}
func checkCommandCompletions(c *Context, name string) bool {
if c.Bool(BashCompletionFlag.Name) && c.App.EnableBashCompletion {
ShowCommandCompletions(c, name)
return true
}
return false
}

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Copyright (c) 2013 John Barton
MIT License
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# GoDotEnv [![wercker status](https://app.wercker.com/status/507594c2ec7e60f19403a568dfea0f78 "wercker status")](https://app.wercker.com/project/bykey/507594c2ec7e60f19403a568dfea0f78)
A Go (golang) port of the Ruby dotenv project (which loads env vars from a .env file)
From the original Library:
> Storing configuration in the environment is one of the tenets of a twelve-factor app. Anything that is likely to change between deployment environments–such as resource handles for databases or credentials for external services–should be extracted from the code into environment variables.
>
> But it is not always practical to set environment variables on development machines or continuous integration servers where multiple projects are run. Dotenv load variables from a .env file into ENV when the environment is bootstrapped.
It can be used as a library (for loading in env for your own daemons etc) or as a bin command.
There is test coverage and CI for both linuxish and windows environments, but I make no guarantees about the bin version working on windows.
## Installation
As a library
```shell
go get github.com/joho/godotenv
```
or if you want to use it as a bin command
```shell
go get github.com/joho/godotenv/cmd/godotenv
```
## Usage
Add your application configuration to your `.env` file in the root of your project:
```shell
S3_BUCKET=YOURS3BUCKET
SECRET_KEY=YOURSECRETKEYGOESHERE
```
Then in your Go app you can do something like
```go
package main
import (
"github.com/joho/godotenv"
"log"
"os"
)
func main() {
err := godotenv.Load()
if err != nil {
log.Fatal("Error loading .env file")
}
s3Bucket := os.Getenv("S3_BUCKET")
secretKey := os.Getenv("SECRET_KEY")
// now do something with s3 or whatever
}
```
If you're even lazier than that, you can just take advantage of the autoload package which will read in `.env` on import
```go
import _ "github.com/joho/godotenv/autoload"
```
While `.env` in the project root is the default, you don't have to be constrained, both examples below are 100% legit
```go
_ = godotenv.Load("somerandomfile")
_ = godotenv.Load("filenumberone.env", "filenumbertwo.env")
```
If you want to be really fancy with your env file you can do comments and exports (below is a valid env file)
```shell
# I am a comment and that is OK
SOME_VAR=someval
FOO=BAR # comments at line end are OK too
export BAR=BAZ
```
Or finally you can do YAML(ish) style
```yaml
FOO: bar
BAR: baz
```
as a final aside, if you don't want godotenv munging your env you can just get a map back instead
```go
var myEnv map[string]string
myEnv, err := godotenv.Read()
s3Bucket := myEnv["S3_BUCKET"]
```
### Command Mode
Assuming you've installed the command as above and you've got `$GOPATH/bin` in your `$PATH`
```
godotenv -f /some/path/to/.env some_command with some args
```
If you don't specify `-f` it will fall back on the default of loading `.env` in `PWD`
## Contributing
Contributions are most welcome! The parser itself is pretty stupidly naive and I wouldn't be surprised if it breaks with edge cases.
*code changes without tests will not be accepted*
1. Fork it
2. Create your feature branch (`git checkout -b my-new-feature`)
3. Commit your changes (`git commit -am 'Added some feature'`)
4. Push to the branch (`git push origin my-new-feature`)
5. Create new Pull Request
## CI
Linux: [![wercker status](https://app.wercker.com/status/507594c2ec7e60f19403a568dfea0f78/m "wercker status")](https://app.wercker.com/project/bykey/507594c2ec7e60f19403a568dfea0f78) Windows: [![Build status](https://ci.appveyor.com/api/projects/status/9v40vnfvvgde64u4)](https://ci.appveyor.com/project/joho/godotenv)
## Who?
The original library [dotenv](https://github.com/bkeepers/dotenv) was written by [Brandon Keepers](http://opensoul.org/), and this port was done by [John Barton](http://whoisjohnbarton.com) based off the tests/fixtures in the original library.

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vendor/github.com/joho/godotenv/autoload/autoload.go generated vendored Normal file
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package autoload
/*
You can just read the .env file on import just by doing
import _ "github.com/joho/godotenv/autoload"
And bob's your mother's brother
*/
import "github.com/joho/godotenv"
func init() {
godotenv.Load()
}

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// Package godotenv is a go port of the ruby dotenv library (https://github.com/bkeepers/dotenv)
//
// Examples/readme can be found on the github page at https://github.com/joho/godotenv
//
// The TL;DR is that you make a .env file that looks something like
//
// SOME_ENV_VAR=somevalue
//
// and then in your go code you can call
//
// godotenv.Load()
//
// and all the env vars declared in .env will be avaiable through os.Getenv("SOME_ENV_VAR")
package godotenv
import (
"bufio"
"errors"
"os"
"os/exec"
"strings"
)
// Load will read your env file(s) and load them into ENV for this process.
//
// Call this function as close as possible to the start of your program (ideally in main)
//
// If you call Load without any args it will default to loading .env in the current path
//
// You can otherwise tell it which files to load (there can be more than one) like
//
// godotenv.Load("fileone", "filetwo")
//
// It's important to note that it WILL NOT OVERRIDE an env variable that already exists - consider the .env file to set dev vars or sensible defaults
func Load(filenames ...string) (err error) {
filenames = filenamesOrDefault(filenames)
for _, filename := range filenames {
err = loadFile(filename, false)
if err != nil {
return // return early on a spazout
}
}
return
}
// Overload will read your env file(s) and load them into ENV for this process.
//
// Call this function as close as possible to the start of your program (ideally in main)
//
// If you call Overload without any args it will default to loading .env in the current path
//
// You can otherwise tell it which files to load (there can be more than one) like
//
// godotenv.Overload("fileone", "filetwo")
//
// It's important to note this WILL OVERRIDE an env variable that already exists - consider the .env file to forcefilly set all vars.
func Overload(filenames ...string) (err error) {
filenames = filenamesOrDefault(filenames)
for _, filename := range filenames {
err = loadFile(filename, true)
if err != nil {
return // return early on a spazout
}
}
return
}
// Read all env (with same file loading semantics as Load) but return values as
// a map rather than automatically writing values into env
func Read(filenames ...string) (envMap map[string]string, err error) {
filenames = filenamesOrDefault(filenames)
envMap = make(map[string]string)
for _, filename := range filenames {
individualEnvMap, individualErr := readFile(filename)
if individualErr != nil {
err = individualErr
return // return early on a spazout
}
for key, value := range individualEnvMap {
envMap[key] = value
}
}
return
}
// Exec loads env vars from the specified filenames (empty map falls back to default)
// then executes the cmd specified.
//
// Simply hooks up os.Stdin/err/out to the command and calls Run()
//
// If you want more fine grained control over your command it's recommended
// that you use `Load()` or `Read()` and the `os/exec` package yourself.
func Exec(filenames []string, cmd string, cmdArgs []string) error {
Load(filenames...)
command := exec.Command(cmd, cmdArgs...)
command.Stdin = os.Stdin
command.Stdout = os.Stdout
command.Stderr = os.Stderr
return command.Run()
}
func filenamesOrDefault(filenames []string) []string {
if len(filenames) == 0 {
return []string{".env"}
}
return filenames
}
func loadFile(filename string, overload bool) error {
envMap, err := readFile(filename)
if err != nil {
return err
}
for key, value := range envMap {
if os.Getenv(key) == "" || overload {
os.Setenv(key, value)
}
}
return nil
}
func readFile(filename string) (envMap map[string]string, err error) {
file, err := os.Open(filename)
if err != nil {
return
}
defer file.Close()
envMap = make(map[string]string)
var lines []string
scanner := bufio.NewScanner(file)
for scanner.Scan() {
lines = append(lines, scanner.Text())
}
for _, fullLine := range lines {
if !isIgnoredLine(fullLine) {
key, value, err := parseLine(fullLine)
if err == nil {
envMap[key] = value
}
}
}
return
}
func parseLine(line string) (key string, value string, err error) {
if len(line) == 0 {
err = errors.New("zero length string")
return
}
// ditch the comments (but keep quoted hashes)
if strings.Contains(line, "#") {
segmentsBetweenHashes := strings.Split(line, "#")
quotesAreOpen := false
var segmentsToKeep []string
for _, segment := range segmentsBetweenHashes {
if strings.Count(segment, "\"") == 1 || strings.Count(segment, "'") == 1 {
if quotesAreOpen {
quotesAreOpen = false
segmentsToKeep = append(segmentsToKeep, segment)
} else {
quotesAreOpen = true
}
}
if len(segmentsToKeep) == 0 || quotesAreOpen {
segmentsToKeep = append(segmentsToKeep, segment)
}
}
line = strings.Join(segmentsToKeep, "#")
}
// now split key from value
splitString := strings.SplitN(line, "=", 2)
if len(splitString) != 2 {
// try yaml mode!
splitString = strings.SplitN(line, ":", 2)
}
if len(splitString) != 2 {
err = errors.New("Can't separate key from value")
return
}
// Parse the key
key = splitString[0]
if strings.HasPrefix(key, "export") {
key = strings.TrimPrefix(key, "export")
}
key = strings.Trim(key, " ")
// Parse the value
value = splitString[1]
// trim
value = strings.Trim(value, " ")
// check if we've got quoted values
if strings.Count(value, "\"") == 2 || strings.Count(value, "'") == 2 {
// pull the quotes off the edges
value = strings.Trim(value, "\"'")
// expand quotes
value = strings.Replace(value, "\\\"", "\"", -1)
// expand newlines
value = strings.Replace(value, "\\n", "\n", -1)
}
return
}
func isIgnoredLine(line string) bool {
trimmedLine := strings.Trim(line, " \n\t")
return len(trimmedLine) == 0 || strings.HasPrefix(trimmedLine, "#")
}

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vendor/github.com/joho/godotenv/wercker.yml generated vendored Normal file
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box: pjvds/golang

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{
"comment": "",
"ignore": "test",
"package": [
{
"path": "github.com/codegangsta/cli",
"revision": "71f57d300dd6a780ac1856c005c4b518cfd498ec",
"revisionTime": "2016-04-03T18:54:34-07:00"
},
{
"path": "github.com/joho/godotenv",
"revision": "4ed13390c0acd2ff4e371e64d8b97c8954138243",
"revisionTime": "2015-09-07T11:02:28+10:00"
},
{
"path": "github.com/joho/godotenv/autoload",
"revision": "4ed13390c0acd2ff4e371e64d8b97c8954138243",
"revisionTime": "2015-09-07T11:02:28+10:00"
}
]
}