drone-s3-sync/main.go
2015-11-14 07:49:43 -08:00

271 lines
5.2 KiB
Go

package main
import (
"encoding/json"
"fmt"
"mime"
"os"
"path/filepath"
"strings"
"github.com/drone/drone-go/drone"
"github.com/drone/drone-go/plugin"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
)
type AWS struct {
client *s3.S3
uploader *s3manager.Uploader
remote []string
local []string
vargs PluginArgs
}
type StringMap struct {
parts map[string]string
}
func (e *StringMap) UnmarshalJSON(b []byte) error {
if len(b) == 0 {
return nil
}
p := map[string]string{}
if err := json.Unmarshal(b, &p); err != nil {
var s string
if err := json.Unmarshal(b, &s); err != nil {
return err
}
p["_string_"] = s
}
e.parts = p
return nil
}
func (e *StringMap) IsEmpty() bool {
if e == nil || len(e.parts) == 0 {
return true
}
return false
}
func (e *StringMap) IsString() bool {
if e.IsEmpty() || len(e.parts) != 1 {
return false
}
_, ok := e.parts["_string_"]
return ok
}
func (e *StringMap) String() string {
if e.IsEmpty() || !e.IsString() {
return ""
}
return e.parts["_string_"]
}
func (e *StringMap) Map() map[string]string {
if e.IsEmpty() || e.IsString() {
return map[string]string{}
}
return e.parts
}
type PluginArgs struct {
Key string `json:"access_key"`
Secret string `json:"secret_key"`
Bucket string `json:"bucket"`
Region string `json:"region"`
Source string `json:"source"`
Target string `json:"target"`
Delete bool `json:"delete"`
Access StringMap `json:"acl"`
ContentType StringMap `json:"content_type"`
}
func NewClient(vargs PluginArgs) AWS {
sess := session.New(&aws.Config{
Credentials: credentials.NewStaticCredentials(vargs.Key, vargs.Secret, ""),
Region: aws.String(vargs.Region),
})
client := s3.New(sess)
uploader := s3manager.NewUploader(sess)
remote := make([]string, 1, 1)
local := make([]string, 1, 1)
a := AWS{client, uploader, remote, local, vargs}
return a
}
func (a *AWS) visit(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if path == "." {
return nil
}
if info.IsDir() {
return nil
}
localPath := strings.TrimPrefix(path, a.vargs.Source)
if strings.HasPrefix(localPath, "/") {
localPath = localPath[1:]
}
a.local = append(a.local, localPath)
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
access := ""
if a.vargs.Access.IsString() {
access = a.vargs.Access.String()
} else if !a.vargs.Access.IsEmpty() {
accessMap := a.vargs.Access.Map()
for pattern := range accessMap {
if match, _ := filepath.Match(pattern, localPath); match == true {
access = accessMap[pattern]
break
}
}
}
if access == "" {
access = "private"
}
fileExt := filepath.Ext(localPath)
var contentType string
if a.vargs.ContentType.IsString() {
contentType = a.vargs.ContentType.String()
} else if !a.vargs.ContentType.IsEmpty() {
contentMap := a.vargs.ContentType.Map()
for patternExt := range contentMap {
if patternExt == fileExt {
contentType = contentMap[patternExt]
break
}
}
}
if contentType == "" {
contentType = mime.TypeByExtension(fileExt)
}
fmt.Printf("Uploading \"%s\" with Content-Type \"%s\" and permissions \"%s\"\n", localPath, contentType, access)
_, err = a.uploader.Upload(&s3manager.UploadInput{
Bucket: aws.String(a.vargs.Bucket),
Key: aws.String(filepath.Join(a.vargs.Target, localPath)),
Body: file,
ContentType: aws.String(contentType),
ACL: aws.String(access),
})
if err != nil {
return err
}
return nil
}
func (a *AWS) List(path string) (*s3.ListObjectsOutput, error) {
return a.client.ListObjects(&s3.ListObjectsInput{
Bucket: aws.String(a.vargs.Bucket),
Prefix: aws.String(path),
})
}
func (a *AWS) Cleanup() error {
for _, remote := range a.remote {
found := false
for _, local := range a.local {
if local == remote {
found = true
break
}
}
if !found {
fmt.Printf("Removing remote file \"%s\"\n", remote)
_, err := a.client.DeleteObject(&s3.DeleteObjectInput{
Bucket: aws.String(a.vargs.Bucket),
Key: aws.String(remote),
})
if err != nil {
return err
}
}
}
return nil
}
func main() {
vargs := PluginArgs{}
workspace := drone.Workspace{}
plugin.Param("vargs", &vargs)
plugin.Param("workspace", &workspace)
if err := plugin.Parse(); err != nil {
fmt.Println(err)
os.Exit(1)
}
if len(vargs.Key) == 0 || len(vargs.Secret) == 0 || len(vargs.Bucket) == 0 {
return
}
if len(vargs.Region) == 0 {
vargs.Region = "us-east-1"
}
if len(vargs.Source) == 0 {
vargs.Source = "."
}
vargs.Source = filepath.Join(workspace.Path, vargs.Source)
if strings.HasPrefix(vargs.Target, "/") {
vargs.Target = vargs.Target[1:]
}
client := NewClient(vargs)
resp, err := client.List(vargs.Target)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
for _, item := range resp.Contents {
client.remote = append(client.remote, *item.Key)
}
err = filepath.Walk(vargs.Source, client.visit)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
if vargs.Delete {
err = client.Cleanup()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
}