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docker.go
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docker.go
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package docker
import (
"errors"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/apex/log"
"github.com/goreleaser/goreleaser/internal/artifact"
"github.com/goreleaser/goreleaser/internal/pipe"
"github.com/goreleaser/goreleaser/internal/semerrgroup"
"github.com/goreleaser/goreleaser/internal/tmpl"
"github.com/goreleaser/goreleaser/pkg/config"
"github.com/goreleaser/goreleaser/pkg/context"
)
// ErrNoDocker is shown when docker cannot be found in $PATH.
var ErrNoDocker = errors.New("docker not present in $PATH")
// Pipe for docker.
type Pipe struct{}
func (Pipe) String() string {
return "docker images"
}
// Default sets the pipe defaults.
func (Pipe) Default(ctx *context.Context) error {
for i := range ctx.Config.Dockers {
var docker = &ctx.Config.Dockers[i]
if docker.Goos == "" {
docker.Goos = "linux"
}
if docker.Goarch == "" {
docker.Goarch = "amd64"
}
if docker.Dockerfile == "" {
docker.Dockerfile = "Dockerfile"
}
for _, f := range docker.Files {
if f == "." || strings.HasPrefix(f, ctx.Config.Dist) {
return fmt.Errorf("invalid docker.files: can't be . or inside dist folder: %s", f)
}
}
}
// only set defaults if there is exactly 1 docker setup in the config file.
if len(ctx.Config.Dockers) != 1 {
return nil
}
if len(ctx.Config.Dockers[0].Binaries) == 0 {
ctx.Config.Dockers[0].Binaries = []string{
ctx.Config.Builds[0].Binary,
}
}
return nil
}
// Run the pipe.
func (Pipe) Run(ctx *context.Context) error {
if len(ctx.Config.Dockers) == 0 || len(ctx.Config.Dockers[0].ImageTemplates) == 0 {
return pipe.Skip("docker section is not configured")
}
_, err := exec.LookPath("docker")
if err != nil {
return ErrNoDocker
}
return doRun(ctx)
}
// Publish the docker images.
func (Pipe) Publish(ctx *context.Context) error {
if ctx.SkipPublish {
return pipe.ErrSkipPublishEnabled
}
var images = ctx.Artifacts.Filter(artifact.ByType(artifact.PublishableDockerImage)).List()
for _, image := range images {
if err := dockerPush(ctx, image); err != nil {
return err
}
}
return nil
}
func doRun(ctx *context.Context) error {
var g = semerrgroup.NewSkipAware(semerrgroup.New(ctx.Parallelism))
for _, docker := range ctx.Config.Dockers {
docker := docker
g.Go(func() error {
log.WithField("docker", docker).Debug("looking for binaries matching")
var binaryNames = make([]string, len(docker.Binaries))
for i := range docker.Binaries {
bin, err := tmpl.New(ctx).Apply(docker.Binaries[i])
if err != nil {
return fmt.Errorf("failed to execute binary template '%s': %w", docker.Binaries[i], err)
}
binaryNames[i] = bin
}
var filters = []artifact.Filter{
artifact.ByGoos(docker.Goos),
artifact.ByGoarch(docker.Goarch),
artifact.ByGoarm(docker.Goarm),
artifact.ByType(artifact.Binary),
func(a *artifact.Artifact) bool {
for _, bin := range binaryNames {
if a.ExtraOr("Binary", "").(string) == bin {
return true
}
}
return false
},
}
if len(docker.Builds) > 0 {
filters = append(filters, artifact.ByIDs(docker.Builds...))
}
var binaries = ctx.Artifacts.Filter(artifact.And(filters...)).List()
// TODO: not so good of a check, if one binary match multiple
// binaries and the other match none, this will still pass...
log.WithField("binaries", binaries).Debug("found binaries")
if len(binaries) != len(docker.Binaries) {
return fmt.Errorf(
"%d binaries match docker definition: %v: %s_%s_%s, should be %d",
len(binaries),
binaryNames, docker.Goos, docker.Goarch, docker.Goarm,
len(docker.Binaries),
)
}
return process(ctx, docker, binaries)
})
}
return g.Wait()
}
func process(ctx *context.Context, docker config.Docker, bins []*artifact.Artifact) error {
tmp, err := ioutil.TempDir(ctx.Config.Dist, "goreleaserdocker")
if err != nil {
return fmt.Errorf("failed to create temporary dir: %w", err)
}
log.Debug("tempdir: " + tmp)
images, err := processImageTemplates(ctx, docker)
if err != nil {
return err
}
if err := os.Link(docker.Dockerfile, filepath.Join(tmp, "Dockerfile")); err != nil {
return fmt.Errorf("failed to link dockerfile: %w", err)
}
for _, file := range docker.Files {
if err := os.MkdirAll(filepath.Join(tmp, filepath.Dir(file)), 0755); err != nil {
return fmt.Errorf("failed to link extra file '%s': %w", file, err)
}
if err := link(file, filepath.Join(tmp, file)); err != nil {
return fmt.Errorf("failed to link extra file '%s': %w", file, err)
}
}
for _, bin := range bins {
if err := os.Link(bin.Path, filepath.Join(tmp, filepath.Base(bin.Path))); err != nil {
return fmt.Errorf("failed to link binary: %w", err)
}
}
buildFlags, err := processBuildFlagTemplates(ctx, docker)
if err != nil {
return err
}
if err := dockerBuild(ctx, tmp, images, buildFlags, docker.Buildx); err != nil {
return err
}
if strings.TrimSpace(docker.SkipPush) == "true" {
return pipe.Skip("docker.skip_push is set")
}
if ctx.SkipPublish {
return pipe.ErrSkipPublishEnabled
}
if ctx.Config.Release.Draft {
return pipe.Skip("release is marked as draft")
}
if strings.TrimSpace(docker.SkipPush) == "auto" && ctx.Semver.Prerelease != "" {
return pipe.Skip("prerelease detected with 'auto' push, skipping docker publish")
}
for _, img := range images {
ctx.Artifacts.Add(&artifact.Artifact{
Type: artifact.PublishableDockerImage,
Name: img,
Path: img,
Goarch: docker.Goarch,
Goos: docker.Goos,
Goarm: docker.Goarm,
})
}
return nil
}
func processImageTemplates(ctx *context.Context, docker config.Docker) ([]string, error) {
// nolint:prealloc
var images []string
for _, imageTemplate := range docker.ImageTemplates {
image, err := tmpl.New(ctx).Apply(imageTemplate)
if err != nil {
return nil, fmt.Errorf("failed to execute image template '%s': %w", imageTemplate, err)
}
if image == "" {
continue
}
images = append(images, image)
}
if len(images) == 0 {
return images, errors.New("no image templates found")
}
return images, nil
}
func processBuildFlagTemplates(ctx *context.Context, docker config.Docker) ([]string, error) {
// nolint:prealloc
var buildFlags []string
for _, buildFlagTemplate := range docker.BuildFlagTemplates {
buildFlag, err := tmpl.New(ctx).Apply(buildFlagTemplate)
if err != nil {
return nil, fmt.Errorf("failed to process build flag template '%s': %w", buildFlagTemplate, err)
}
buildFlags = append(buildFlags, buildFlag)
}
return buildFlags, nil
}
// walks the src, recreating dirs and hard-linking files.
func link(src, dest string) error {
return filepath.Walk(src, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
// We have the following:
// - src = "a/b"
// - dest = "dist/linuxamd64/b"
// - path = "a/b/c.txt"
// So we join "a/b" with "c.txt" and use it as the destination.
var dst = filepath.Join(dest, strings.Replace(path, src, "", 1))
log.WithFields(log.Fields{
"src": path,
"dst": dst,
}).Debug("extra file")
if info.IsDir() {
return os.MkdirAll(dst, info.Mode())
}
return os.Link(path, dst)
})
}
func dockerBuild(ctx *context.Context, root string, images, flags []string, buildx bool) error {
log.WithField("image", images[0]).WithField("buildx", buildx).Info("building docker image")
/* #nosec */
var cmd = exec.CommandContext(ctx, "docker", buildCommand(buildx, images, flags)...)
cmd.Dir = root
log.WithField("cmd", cmd.Args).WithField("cwd", cmd.Dir).Debug("running")
out, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("failed to build docker image: %s: \n%s: %w", images[0], string(out), err)
}
log.Debugf("docker build output: \n%s", string(out))
return nil
}
func buildCommand(buildx bool, images, flags []string) []string {
base := []string{"build", "."}
if buildx {
base = []string{"buildx", "build", "."}
}
for _, image := range images {
base = append(base, "-t", image)
}
base = append(base, flags...)
return base
}
func dockerPush(ctx *context.Context, image *artifact.Artifact) error {
log.WithField("image", image.Name).Info("pushing docker image")
/* #nosec */
var cmd = exec.CommandContext(ctx, "docker", "push", image.Name)
log.WithField("cmd", cmd.Args).Debug("running")
out, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("failed to push docker image: \n%s: %w", string(out), err)
}
log.Debugf("docker push output: \n%s", string(out))
ctx.Artifacts.Add(&artifact.Artifact{
Type: artifact.DockerImage,
Name: image.Name,
Path: image.Path,
Goarch: image.Goarch,
Goos: image.Goos,
Goarm: image.Goarm,
})
return nil
}