306 lines
7.4 KiB
Go
306 lines
7.4 KiB
Go
package main
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"time"
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"github.com/drone/drone-plugin-go/plugin"
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)
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type Save struct {
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// Absolute or relative path
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File string `json:"destination"`
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// Only save specified tags (optional)
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Tags StrSlice `json:"tag"`
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}
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type Docker struct {
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Storage string `json:"storage_driver"`
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Registry string `json:"registry"`
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Mirror string `json:"mirror"`
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Insecure bool `json:"insecure"`
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Username string `json:"username"`
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Password string `json:"password"`
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Email string `json:"email"`
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Auth string `json:"auth"`
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Repo string `json:"repo"`
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ForceTag bool `json:"force_tag"`
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Tag StrSlice `json:"tag"`
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File string `json:"file"`
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Context string `json:"context"`
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Bip string `json:"bip"`
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Dns []string `json:"dns"`
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Load string `json:"load"`
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Save Save `json:"save"`
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BuildArgs []string `json:"build_args"`
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}
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var (
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buildDate string
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)
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func main() {
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fmt.Printf("Drone Docker Plugin built at %s\n", buildDate)
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workspace := plugin.Workspace{}
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build := plugin.Build{}
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vargs := Docker{}
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plugin.Param("workspace", &workspace)
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plugin.Param("build", &build)
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plugin.Param("vargs", &vargs)
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plugin.MustParse()
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// in case someone uses the shorthand repository name
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// with a custom registry, we should concatinate so that
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// we have the fully qualified image name.
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if strings.Count(vargs.Repo, "/") <= 1 && len(vargs.Registry) != 0 && !strings.HasPrefix(vargs.Repo, vargs.Registry) {
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vargs.Repo = fmt.Sprintf("%s/%s", vargs.Registry, vargs.Repo)
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}
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// Set the Registry value
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if len(vargs.Registry) == 0 {
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vargs.Registry = "https://index.docker.io/v1/"
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}
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// Set the Dockerfile name
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if len(vargs.File) == 0 {
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vargs.File = "Dockerfile"
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}
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// Set the Context value
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if len(vargs.Context) == 0 {
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vargs.Context = "."
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}
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// Set the Tag value
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if vargs.Tag.Len() == 0 {
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vargs.Tag = StrSlice{[]string{"latest"}}
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}
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// Get absolute path for 'save' file
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if len(vargs.Save.File) != 0 {
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if !filepath.IsAbs(vargs.Save.File) {
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vargs.Save.File = filepath.Join(workspace.Path, vargs.Save.File)
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}
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}
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// Get absolute path for 'load' file
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if len(vargs.Load) != 0 {
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if !filepath.IsAbs(vargs.Load) {
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vargs.Load = filepath.Join(workspace.Path, vargs.Load)
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}
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}
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go func() {
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args := []string{"daemon", "-g", "/drone/docker"}
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if len(vargs.Storage) != 0 {
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args = append(args, "-s", vargs.Storage)
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}
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if vargs.Insecure && len(vargs.Registry) != 0 {
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args = append(args, "--insecure-registry", vargs.Registry)
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}
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if len(vargs.Mirror) != 0 {
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args = append(args, "--registry-mirror", vargs.Mirror)
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}
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if len(vargs.Bip) != 0 {
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args = append(args, "--bip", vargs.Bip)
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}
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for _, value := range vargs.Dns {
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args = append(args, "--dns", value)
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}
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cmd := exec.Command("/usr/bin/docker", args...)
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if os.Getenv("DOCKER_LAUNCH_DEBUG") == "true" {
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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} else {
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cmd.Stdout = ioutil.Discard
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cmd.Stderr = ioutil.Discard
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}
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trace(cmd)
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cmd.Run()
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}()
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// ping Docker until available
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for i := 0; i < 3; i++ {
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cmd := exec.Command("/usr/bin/docker", "info")
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cmd.Stdout = ioutil.Discard
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cmd.Stderr = ioutil.Discard
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err := cmd.Run()
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if err == nil {
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break
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}
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time.Sleep(time.Second * 5)
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}
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// Login to Docker
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if len(vargs.Username) != 0 {
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cmd := exec.Command("/usr/bin/docker", "login", "-u", vargs.Username, "-p", vargs.Password, "-e", vargs.Email, vargs.Registry)
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cmd.Dir = workspace.Path
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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err := cmd.Run()
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if err != nil {
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fmt.Println("Login failed.")
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os.Exit(1)
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}
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} else {
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fmt.Printf("A username was not specified. Assuming anonymous publishing.\n")
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}
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// Docker environment info
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cmd := exec.Command("/usr/bin/docker", "version")
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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cmd.Run()
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cmd = exec.Command("/usr/bin/docker", "info")
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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cmd.Run()
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// Restore from tarred image repository
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if len(vargs.Load) != 0 {
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if _, err := os.Stat(vargs.Load); err != nil {
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fmt.Printf("Archive %s does not exist. Building from scratch.\n", vargs.Load)
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} else {
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cmd := exec.Command("/usr/bin/docker", "load", "-i", vargs.Load)
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cmd.Dir = workspace.Path
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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err := cmd.Run()
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if err != nil {
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os.Exit(1)
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}
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}
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}
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// Build the container
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name := fmt.Sprintf("%s:%s", vargs.Repo, vargs.Tag.Slice()[0])
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cmd = exec.Command("/usr/bin/docker", "build", "--pull=true", "--rm=true", "-f", vargs.File, "-t", name)
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for _, value := range vargs.BuildArgs {
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cmd.Args = append(cmd.Args, "--build-arg", value)
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}
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cmd.Args = append(cmd.Args, vargs.Context)
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cmd.Dir = workspace.Path
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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err := cmd.Run()
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if err != nil {
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os.Exit(1)
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}
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// Creates image tags
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for _, tag := range vargs.Tag.Slice()[1:] {
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name_ := fmt.Sprintf("%s:%s", vargs.Repo, tag)
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cmd = exec.Command("/usr/bin/docker", "tag")
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if vargs.ForceTag {
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cmd.Args = append(cmd.Args, "--force=true")
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}
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cmd.Args = append(cmd.Args, name, name_)
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cmd.Dir = workspace.Path
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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err = cmd.Run()
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if err != nil {
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os.Exit(1)
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}
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}
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// Push the image and tags to the registry
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for _, tag := range vargs.Tag.Slice() {
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name_ := fmt.Sprintf("%s:%s", vargs.Repo, tag)
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cmd = exec.Command("/usr/bin/docker", "push", name_)
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cmd.Dir = workspace.Path
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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err = cmd.Run()
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if err != nil {
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os.Exit(1)
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}
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}
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// Remove untagged images, if any
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var outbuf bytes.Buffer
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cmd = exec.Command("sh", "-c", "docker images | grep '^<none>' | awk '{print $3}'")
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cmd.Stdout = &outbuf
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cmd.Stderr = os.Stderr
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trace(cmd)
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err = cmd.Run()
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if err != nil {
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os.Exit(1)
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}
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if outbuf.Len() > 0 {
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images := strings.Split(strings.TrimSpace(outbuf.String()), "\n")
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cmd = exec.Command("docker", append([]string{"rmi"}, images...)...)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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err := cmd.Run()
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if err != nil {
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os.Exit(1)
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}
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}
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// Save to tarred image repository
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if len(vargs.Save.File) != 0 {
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// if the destination directory does not exist, create it
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dir := filepath.Dir(vargs.Save.File)
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os.MkdirAll(dir, 0755)
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cmd = exec.Command("/usr/bin/docker", "save", "-o", vargs.Save.File)
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// Limit saving to the given tags
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if vargs.Save.Tags.Len() != 0 {
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for _, tag := range vargs.Save.Tags.Slice() {
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name_ := fmt.Sprintf("%s:%s", vargs.Repo, tag)
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cmd.Args = append(cmd.Args, name_)
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}
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} else {
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cmd.Args = append(cmd.Args, vargs.Repo)
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}
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cmd.Dir = workspace.Path
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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trace(cmd)
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err := cmd.Run()
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if err != nil {
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os.Exit(1)
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}
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}
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}
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// Trace writes each command to standard error (preceded by a ‘$ ’) before it
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// is executed. Used for debugging your build.
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func trace(cmd *exec.Cmd) {
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fmt.Println("$", strings.Join(cmd.Args, " "))
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}
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// authorize is a helper function that authorizes the Docker client
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// by manually creating the Docker authentication file.
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func authorize(d *Docker) error {
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var path = "/root/.dockercfg" // TODO should probably use user.Home() for good measure
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var data = fmt.Sprintf(dockerconf, d.Registry, d.Auth, d.Email)
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return ioutil.WriteFile(path, []byte(data), 0644)
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}
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var dockerconf = `
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{
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"%s": {
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"auth": "%s",
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"email": "%s"
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}
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}
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`
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