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bake.go
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bake.go
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package commands
import (
"context"
"encoding/json"
"fmt"
"os"
"github.com/docker/buildx/bake"
"github.com/docker/buildx/build"
"github.com/docker/buildx/util/progress"
"github.com/docker/buildx/util/tracing"
"github.com/docker/cli/cli/command"
"github.com/docker/docker/pkg/ioutils"
"github.com/moby/buildkit/util/appcontext"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
type bakeOptions struct {
files []string
printOnly bool
overrides []string
commonOptions
}
func runBake(dockerCli command.Cli, targets []string, in bakeOptions) (err error) {
ctx := appcontext.Context()
ctx, end, err := tracing.TraceCurrentCommand(ctx, "bake")
if err != nil {
return err
}
defer func() {
end(err)
}()
var url string
cmdContext := "cwd://"
if len(targets) > 0 {
if bake.IsRemoteURL(targets[0]) {
url = targets[0]
targets = targets[1:]
if len(targets) > 0 {
if bake.IsRemoteURL(targets[0]) {
cmdContext = targets[0]
targets = targets[1:]
}
}
}
}
if len(targets) == 0 {
targets = []string{"default"}
}
overrides := in.overrides
if in.exportPush {
if in.exportLoad {
return errors.Errorf("push and load may not be set together at the moment")
}
overrides = append(overrides, "*.output=type=registry")
} else if in.exportLoad {
overrides = append(overrides, "*.output=type=docker")
}
if in.noCache != nil {
overrides = append(overrides, fmt.Sprintf("*.no-cache=%t", *in.noCache))
}
if in.pull != nil {
overrides = append(overrides, fmt.Sprintf("*.pull=%t", *in.pull))
}
contextPathHash, _ := os.Getwd()
ctx2, cancel := context.WithCancel(context.TODO())
defer cancel()
printer := progress.NewPrinter(ctx2, os.Stderr, in.progress)
defer func() {
if printer != nil {
err1 := printer.Wait()
if err == nil {
err = err1
}
}
}()
dis, err := getInstanceOrDefault(ctx, dockerCli, in.builder, contextPathHash)
if err != nil {
return err
}
var files []bake.File
var inp *bake.Input
if url != "" {
files, inp, err = bake.ReadRemoteFiles(ctx, dis, url, in.files, printer)
} else {
files, err = bake.ReadLocalFiles(in.files)
}
if err != nil {
return err
}
m, err := bake.ReadTargets(ctx, files, targets, overrides, map[string]string{
"BAKE_CMD_CONTEXT": cmdContext,
})
if err != nil {
return err
}
// this function can update target context string from the input so call before printOnly check
bo, err := bake.TargetsToBuildOpt(m, inp)
if err != nil {
return err
}
if in.printOnly {
dt, err := json.MarshalIndent(map[string]map[string]*bake.Target{"target": m}, "", " ")
if err != nil {
return err
}
err = printer.Wait()
printer = nil
if err != nil {
return err
}
fmt.Fprintln(dockerCli.Out(), string(dt))
return nil
}
resp, err := build.Build(ctx, dis, bo, dockerAPI(dockerCli), dockerCli.ConfigFile(), printer)
if err != nil {
return err
}
if len(in.metadataFile) > 0 && resp != nil {
mdata := map[string]map[string]string{}
for k, r := range resp {
mdata[k] = r.ExporterResponse
}
mdatab, err := json.MarshalIndent(mdata, "", " ")
if err != nil {
return err
}
if err := ioutils.AtomicWriteFile(in.metadataFile, mdatab, 0644); err != nil {
return err
}
}
return err
}
func bakeCmd(dockerCli command.Cli, rootOpts *rootOptions) *cobra.Command {
var options bakeOptions
cmd := &cobra.Command{
Use: "bake [OPTIONS] [TARGET...]",
Aliases: []string{"f"},
Short: "Build from a file",
RunE: func(cmd *cobra.Command, args []string) error {
// reset to nil to avoid override is unset
if !cmd.Flags().Lookup("no-cache").Changed {
options.noCache = nil
}
if !cmd.Flags().Lookup("pull").Changed {
options.pull = nil
}
options.commonOptions.builder = rootOpts.builder
return runBake(dockerCli, args, options)
},
}
flags := cmd.Flags()
flags.StringArrayVarP(&options.files, "file", "f", []string{}, "Build definition file")
flags.BoolVar(&options.printOnly, "print", false, "Print the options without building")
flags.StringArrayVar(&options.overrides, "set", nil, "Override target value (eg: targetpattern.key=value)")
flags.BoolVar(&options.exportPush, "push", false, "Shorthand for --set=*.output=type=registry")
flags.BoolVar(&options.exportLoad, "load", false, "Shorthand for --set=*.output=type=docker")
commonBuildFlags(&options.commonOptions, flags)
return cmd
}