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universalbinary.go
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universalbinary.go
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// Package universalbinary can join multiple darwin binaries into a single universal binary.
package universalbinary
import (
"debug/macho"
"encoding/binary"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/caarlos0/go-shellwords"
"github.com/caarlos0/log"
"github.com/goreleaser/goreleaser/internal/artifact"
"github.com/goreleaser/goreleaser/internal/gio"
"github.com/goreleaser/goreleaser/internal/ids"
"github.com/goreleaser/goreleaser/internal/pipe"
"github.com/goreleaser/goreleaser/internal/semerrgroup"
"github.com/goreleaser/goreleaser/internal/shell"
"github.com/goreleaser/goreleaser/internal/skips"
"github.com/goreleaser/goreleaser/internal/tmpl"
"github.com/goreleaser/goreleaser/pkg/build"
"github.com/goreleaser/goreleaser/pkg/config"
"github.com/goreleaser/goreleaser/pkg/context"
)
// Pipe for macos universal binaries.
type Pipe struct{}
func (Pipe) String() string { return "universal binaries" }
func (Pipe) Skip(ctx *context.Context) bool { return len(ctx.Config.UniversalBinaries) == 0 }
// Default sets the pipe defaults.
func (Pipe) Default(ctx *context.Context) error {
ids := ids.New("universal_binaries")
for i := range ctx.Config.UniversalBinaries {
unibin := &ctx.Config.UniversalBinaries[i]
if unibin.ID == "" {
unibin.ID = ctx.Config.ProjectName
}
if len(unibin.IDs) == 0 {
unibin.IDs = []string{unibin.ID}
}
if unibin.NameTemplate == "" {
unibin.NameTemplate = "{{ .ProjectName }}"
}
ids.Inc(unibin.ID)
}
return ids.Validate()
}
// Run the pipe.
func (Pipe) Run(ctx *context.Context) error {
g := semerrgroup.NewSkipAware(semerrgroup.New(ctx.Parallelism))
for _, unibin := range ctx.Config.UniversalBinaries {
g.Go(func() error {
opts := build.Options{
Target: "darwin_all",
Goos: "darwin",
Goarch: "all",
}
if !skips.Any(ctx, skips.PreBuildHooks) {
if err := runHook(ctx, &opts, unibin.Hooks.Pre); err != nil {
return fmt.Errorf("pre hook failed: %w", err)
}
}
if err := makeUniversalBinary(ctx, &opts, unibin); err != nil {
return err
}
if !skips.Any(ctx, skips.PostBuildHooks) {
if err := runHook(ctx, &opts, unibin.Hooks.Post); err != nil {
return fmt.Errorf("post hook failed: %w", err)
}
}
if !unibin.Replace {
return nil
}
return ctx.Artifacts.Remove(filterFor(unibin))
})
}
return g.Wait()
}
func runHook(ctx *context.Context, opts *build.Options, hooks config.Hooks) error {
if len(hooks) == 0 {
return nil
}
for _, hook := range hooks {
var envs []string
envs = append(envs, ctx.Env.Strings()...)
tpl := tmpl.New(ctx).WithBuildOptions(*opts)
for _, rawEnv := range hook.Env {
env, err := tpl.Apply(rawEnv)
if err != nil {
return err
}
envs = append(envs, env)
}
tpl = tpl.WithEnvS(envs)
dir, err := tpl.Apply(hook.Dir)
if err != nil {
return err
}
sh, err := tpl.Apply(hook.Cmd)
if err != nil {
return err
}
log.WithField("hook", sh).Info("running hook")
cmd, err := shellwords.Parse(sh)
if err != nil {
return err
}
if err := shell.Run(ctx, dir, cmd, envs, hook.Output); err != nil {
return err
}
}
return nil
}
type input struct {
data []byte
cpu uint32
subcpu uint32
offset int64
}
const (
// Alignment wanted for each sub-file.
// amd64 needs 12 bits, arm64 needs 14. We choose the max of all requirements here.
alignBits = 14
align = 1 << alignBits
)
// heavily based on https://github.com/randall77/makefat
func makeUniversalBinary(ctx *context.Context, opts *build.Options, unibin config.UniversalBinary) error {
if err := tmpl.New(ctx).ApplyAll(
&unibin.NameTemplate,
&unibin.ModTimestamp,
); err != nil {
return err
}
name := unibin.NameTemplate
opts.Name = name
path := filepath.Join(ctx.Config.Dist, unibin.ID+"_darwin_all", name)
opts.Path = path
if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
return err
}
binaries := ctx.Artifacts.Filter(filterFor(unibin)).List()
if len(binaries) == 0 {
return pipe.Skipf("no darwin binaries found with ids: %s", strings.Join(unibin.IDs, ", "))
}
log.WithField("id", unibin.ID).
WithField("binary", path).
Infof("creating from %d binaries", len(binaries))
var inputs []input
offset := int64(align)
for _, f := range binaries {
data, err := os.ReadFile(f.Path)
if err != nil {
return fmt.Errorf("failed to read binary: %w", err)
}
inputs = append(inputs, input{
data: data,
cpu: binary.LittleEndian.Uint32(data[4:8]),
subcpu: binary.LittleEndian.Uint32(data[8:12]),
offset: offset,
})
offset += int64(len(data))
offset = (offset + align - 1) / align * align
}
// Make output file.
out, err := os.Create(path)
if err != nil {
return fmt.Errorf("failed to create file: %w", err)
}
defer out.Close()
if err := out.Chmod(0o755); err != nil {
return fmt.Errorf("failed to create file: %w", err)
}
// Build a fat_header.
hdr := []uint32{macho.MagicFat, uint32(len(inputs))}
// Build a fat_arch for each input file.
for _, i := range inputs {
hdr = append(hdr, i.cpu)
hdr = append(hdr, i.subcpu)
hdr = append(hdr, uint32(i.offset))
hdr = append(hdr, uint32(len(i.data)))
hdr = append(hdr, alignBits)
}
// Write header.
// Note that the fat binary header is big-endian, regardless of the
// endianness of the contained files.
if err := binary.Write(out, binary.BigEndian, hdr); err != nil {
return fmt.Errorf("failed to write to file: %w", err)
}
offset = int64(4 * len(hdr))
// Write each contained file.
for _, i := range inputs {
if offset < i.offset {
if _, err := out.Write(make([]byte, i.offset-offset)); err != nil {
return fmt.Errorf("failed to write to file: %w", err)
}
offset = i.offset
}
if _, err := out.Write(i.data); err != nil {
return fmt.Errorf("failed to write to file: %w", err)
}
offset += int64(len(i.data))
}
if err := out.Close(); err != nil {
return fmt.Errorf("failed to close file: %w", err)
}
if err := gio.Chtimes(path, unibin.ModTimestamp); err != nil {
return err
}
extra := map[string]interface{}{}
for k, v := range binaries[0].Extra {
extra[k] = v
}
extra[artifact.ExtraReplaces] = unibin.Replace
extra[artifact.ExtraID] = unibin.ID
ctx.Artifacts.Add(&artifact.Artifact{
Type: artifact.UniversalBinary,
Name: name,
Path: path,
Goos: "darwin",
Goarch: "all",
Extra: extra,
})
return nil
}
func filterFor(unibin config.UniversalBinary) artifact.Filter {
return artifact.And(
artifact.ByType(artifact.Binary),
artifact.ByGoos("darwin"),
artifact.ByIDs(unibin.IDs...),
)
}