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buildpacks_builder.go
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/
buildpacks_builder.go
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package imgsrc
import (
"context"
"fmt"
"io"
"os"
"github.com/buildpacks/pack"
projectTypes "github.com/buildpacks/pack/pkg/project/types"
"github.com/pkg/errors"
"github.com/superfly/flyctl/internal/cmdfmt"
"github.com/superfly/flyctl/iostreams"
"github.com/superfly/flyctl/terminal"
)
type buildpacksBuilder struct{}
func (*buildpacksBuilder) Name() string {
return "Buildpacks"
}
func (*buildpacksBuilder) Run(ctx context.Context, dockerFactory *dockerClientFactory, streams *iostreams.IOStreams, opts ImageOptions) (*DeploymentImage, error) {
if !dockerFactory.mode.IsAvailable() {
terminal.Debug("docker daemon not available, skipping")
return nil, nil
}
if opts.Builder == "" {
terminal.Debug("no buildpack builder configured, skipping")
return nil, nil
}
builder := opts.Builder
buildpacks := opts.Buildpacks
docker, err := dockerFactory.buildFn(ctx)
if err != nil {
return nil, err
}
defer clearDeploymentTags(ctx, docker, opts.Tag)
packClient, err := pack.NewClient(pack.WithDockerClient(docker), pack.WithLogger(newPackLogger(streams.Out)))
if err != nil {
return nil, err
}
serverInfo, err := docker.Info(ctx)
if err != nil {
terminal.Debug("error fetching docker server info:", err)
}
cmdfmt.PrintBegin(streams.ErrOut, "Building image with Buildpacks")
msg := fmt.Sprintf("docker host: %s %s %s", serverInfo.ServerVersion, serverInfo.OSType, serverInfo.Architecture)
cmdfmt.PrintDone(streams.ErrOut, msg)
excludes, err := readDockerignore(opts.WorkingDir)
if err != nil {
return nil, errors.Wrap(err, "error reading .dockerignore")
}
err = packClient.Build(ctx, pack.BuildOptions{
AppPath: opts.WorkingDir,
Builder: builder,
ClearCache: opts.NoCache,
Image: newCacheTag(opts.AppName),
Buildpacks: buildpacks,
Env: normalizeBuildArgs(opts.BuildArgs),
TrustBuilder: true,
AdditionalTags: []string{opts.Tag},
ProjectDescriptor: projectTypes.Descriptor{
Build: projectTypes.Build{
Exclude: excludes,
},
},
})
if err != nil {
return nil, err
}
cmdfmt.PrintDone(streams.ErrOut, "Building image done")
if opts.Publish {
cmdfmt.PrintBegin(streams.ErrOut, "Pushing image to fly")
if err := pushToFly(ctx, docker, streams, opts.Tag); err != nil {
return nil, err
}
cmdfmt.PrintDone(streams.ErrOut, "Pushing image done")
}
img, err := findImageWithDocker(ctx, docker, opts.Tag)
if err != nil {
return nil, err
}
return &DeploymentImage{
ID: img.ID,
Tag: opts.Tag,
Size: img.Size,
}, nil
}
func normalizeBuildArgs(buildArgs map[string]string) map[string]string {
out := map[string]string{}
for k, v := range buildArgs {
out[k] = v
}
return out
}
func newPackLogger(out io.Writer) *packLogger {
// pack blocks writes to the underlying writer for it's lifetime.
// we need to use it too, so instead of giving pack stdout/stderr
// give it a burner writer that we pipe to the target
packR, packW := io.Pipe()
go func() {
io.Copy(out, packR)
defer packR.Close()
}()
return &packLogger{
w: &fdWrapper{
Writer: packW,
src: out,
},
debug: os.Getenv("LOG_LEVEL") == "debug",
}
}
type packLogger struct {
w io.Writer
debug bool
}
func (l *packLogger) Debug(msg string) {
if !l.debug {
return
}
fmt.Fprint(l.w, cmdfmt.AppendMissingLineFeed(msg))
}
func (l *packLogger) Debugf(format string, v ...interface{}) {
if !l.debug {
return
}
fmt.Fprint(l.w, cmdfmt.AppendMissingLineFeed(fmt.Sprintf(format, v...)))
}
func (l *packLogger) Info(msg string) {
fmt.Fprint(l.w, cmdfmt.AppendMissingLineFeed(msg))
}
func (l *packLogger) Infof(format string, v ...interface{}) {
fmt.Fprint(l.w, cmdfmt.AppendMissingLineFeed(fmt.Sprintf(format, v...)))
}
func (l *packLogger) Warn(msg string) {
fmt.Fprint(l.w, cmdfmt.AppendMissingLineFeed(msg))
}
func (l *packLogger) Warnf(format string, v ...interface{}) {
fmt.Fprint(l.w, cmdfmt.AppendMissingLineFeed(fmt.Sprintf(format, v...)))
}
func (l *packLogger) Error(msg string) {
fmt.Fprint(l.w, cmdfmt.AppendMissingLineFeed(msg))
}
func (l *packLogger) Errorf(format string, v ...interface{}) {
fmt.Fprint(l.w, cmdfmt.AppendMissingLineFeed(fmt.Sprintf(format, v...)))
}
func (l *packLogger) Writer() io.Writer {
return l.w
}
func (l *packLogger) IsVerbose() bool {
return l.debug
}
// fdWrapper creates an io.Writer wrapper that writes to one Writer but reads Fd from another.
// this is used so we can pass the correct Fd through for terminal detection while
// still writing to our piped writer
type fdWrapper struct {
io.Writer
src io.Writer
}
type fdWriter interface {
Fd() uintptr
}
func (w *fdWrapper) Fd() uintptr {
if fd, ok := w.src.(fdWriter); ok {
return fd.Fd()
}
return ^(uintptr(0))
}