drone-docker-buildx/plugin/impl.go

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package plugin
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"time"
"github.com/sirupsen/logrus"
"github.com/urfave/cli/v2"
)
// Daemon defines Docker daemon parameters.
type 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 cli.StringSlice // Docker daemon dns server
DNSSearch cli.StringSlice // Docker daemon dns search domain
MTU string // Docker daemon mtu setting
IPv6 bool // Docker daemon IPv6 networking
Experimental bool // Docker daemon enable experimental mode
BuildkitConfig string // Docker buildkit config
}
// Login defines Docker login parameters.
type Login struct {
Registry string // Docker registry address
Username string // Docker registry username
Password string // Docker registry password
Email string // Docker registry email
Config string // Docker Auth Config
}
// Build defines Docker build parameters.
type Build struct {
Ref string // Git commit ref
Branch string // Git repository branch
Dockerfile string // Docker build Dockerfile
Context string // Docker build context
TagsAuto bool // Docker build auto tag
TagsSuffix string // Docker build tags with suffix
Tags cli.StringSlice // Docker build tags
ExtraTags cli.StringSlice // Docker build tags including registry
Platforms cli.StringSlice // Docker build target platforms
Args cli.StringSlice // Docker build args
ArgsEnv cli.StringSlice // Docker build args from env
Target string // Docker build target
Pull bool // Docker build pull
CacheFrom []string // Docker build cache-from
CacheTo string // Docker build cache-to
Compress bool // Docker build compress
Repo string // Docker build repository
NoCache bool // Docker build no-cache
AddHost cli.StringSlice // Docker build add-host
Quiet bool // Docker build quiet
Output string // Docker build output folder
NamedContext cli.StringSlice // Docker build named context
Labels cli.StringSlice // Docker build labels
Provenance string // Docker build provenance attestation
}
// Settings for the Plugin.
type Settings struct {
Daemon Daemon
Login Login
Build Build
Dryrun bool
}
// Validate handles the settings validation of the plugin.
func (p *Plugin) Validate() error {
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p.settings.Build.Branch = p.pipeline.Repo.Branch
p.settings.Build.Ref = p.pipeline.Commit.Ref
p.settings.Daemon.Registry = p.settings.Login.Registry
if p.settings.Build.TagsAuto {
// return true if tag event or default branch
if UseDefaultTag(
p.settings.Build.Ref,
p.settings.Build.Branch,
) {
tag, err := DefaultTagSuffix(
p.settings.Build.Ref,
p.settings.Build.TagsSuffix,
)
if err != nil {
logrus.Infof("cannot generate tags from %s, invalid semantic version", p.settings.Build.Ref)
return err
}
p.settings.Build.Tags = *cli.NewStringSlice(tag...)
} else {
logrus.Infof("skip auto-tagging for %s, not on default branch or tag", p.settings.Build.Ref)
return nil
}
}
return nil
}
// Execute provides the implementation of the plugin.
func (p *Plugin) Execute() error {
// start the Docker daemon server
if !p.settings.Daemon.Disabled {
p.startDaemon()
}
// 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)
}
// Create Auth Config File
if p.settings.Login.Config != "" {
if err := os.MkdirAll(dockerHome, 0o600); err != nil {
return fmt.Errorf("failed to create docker home: %s", err)
}
path := filepath.Join(dockerHome, "config.json")
err := os.WriteFile(path, []byte(p.settings.Login.Config), 0o600)
if err != nil {
return fmt.Errorf("error writing config.json: %s", err)
}
}
// login to the Docker registry
if p.settings.Login.Password != "" {
cmd := commandLogin(p.settings.Login)
err := cmd.Run()
if err != nil {
return fmt.Errorf("error authenticating: %s", err)
}
}
if p.settings.Daemon.BuildkitConfig != "" {
err := os.WriteFile(buildkitConfig, []byte(p.settings.Daemon.BuildkitConfig), 0o600)
if err != nil {
return fmt.Errorf("error writing buildkit.toml: %s", err)
}
}
switch {
case p.settings.Login.Password != "":
fmt.Println("Detected registry credentials")
case p.settings.Login.Config != "":
fmt.Println("Detected registry credentials file")
default:
fmt.Println("Registry credentials or Docker config not provided. Guest mode enabled.")
}
// add proxy build args
addProxyBuildArgs(&p.settings.Build)
var cmds []*exec.Cmd
cmds = append(cmds, commandVersion()) // docker version
cmds = append(cmds, commandInfo()) // docker info
cmds = append(cmds, commandBuilder(p.settings.Daemon))
cmds = append(cmds, commandBuildx())
cmds = append(cmds, commandBuild(p.settings.Build, p.settings.Dryrun)) // docker build
// 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
}