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tinygo: -compiler command line argument (e.g. tinygo) #121

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tinygo: -compiler command line argument (e.g. tinygo) #121

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b37fc01
-compiler command line argument (e.g. tinygo)
archie2x Aug 6, 2024
ee82c9a
add golang.WithCompiler() to set compiler on existing env
archie2x Aug 6, 2024
81f0c36
Address CRs
archie2x Sep 16, 2024
be6e468
More CR.
archie2x Sep 19, 2024
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9 changes: 8 additions & 1 deletion src/cmd/makebb/makebb.go
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,14 @@ func main() {
l.Printf("Disabling CGO for u-root...")
env.CgoEnabled = false
}
l.Printf("Build environment: %s", env)

err = env.CompilerInit()
if err != nil {
l.Fatal(err)
}

l.Printf("Build environment: %s\n", env)
l.Printf("Compiler: %s\n", env.Compiler.VersionOutput)

tmpDir := *genDir
remove := false
Expand Down
89 changes: 11 additions & 78 deletions src/pkg/golang/build.go
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Original file line number Diff line number Diff line change
Expand Up @@ -9,9 +9,7 @@ import (
"flag"
"fmt"
"go/build"
"log"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
Expand All @@ -36,6 +34,8 @@ type Environ struct {
GO111MODULE string
Mod ModBehavior
GBBDEBUG bool

Compiler Compiler
}

// Copy makes a copy of Environ with the given changes.
Expand All @@ -45,6 +45,7 @@ func (c *Environ) Copy(opts ...Opt) *Environ {
GO111MODULE: c.GO111MODULE,
Mod: c.Mod,
GBBDEBUG: c.GBBDEBUG,
Compiler: c.Compiler,
}
e.Apply(opts...)
return e
Expand All @@ -54,6 +55,8 @@ func (c *Environ) Copy(opts ...Opt) *Environ {
func (c *Environ) RegisterFlags(f *flag.FlagSet) {
f.Var((*uflag.Strings)(&c.BuildTags), "go-build-tags", "Go build tags")
f.StringVar((*string)(&c.Mod), "go-mod", string(c.Mod), "Value of -mod to go commands (allowed: (empty), vendor, mod, readonly)")
f.StringVar((*string)(&c.Compiler.Path), "compiler", "",
"override go compiler used (e.g. \"/path/to/tinygo\")")
}

// Valid returns an error if GOARCH, GOROOT, or GOOS are unset.
Expand Down Expand Up @@ -176,6 +179,12 @@ func (c *Environ) Apply(opts ...Opt) {

// Lookup looks up packages by patterns relative to dir, using the Go environment from c.
func (c *Environ) Lookup(mode packages.LoadMode, patterns ...string) ([]*packages.Package, error) {

// required to compute compiler build tags
if err := c.CompilerInit(); err != nil {
return nil, err
}

cfg := &packages.Config{
Mode: mode,
Env: append(os.Environ(), c.Env()...),
Expand All @@ -191,34 +200,6 @@ func (c *Environ) Lookup(mode packages.LoadMode, patterns ...string) ([]*package
return packages.Load(cfg, patterns...)
}

// GoCmd runs a go command in the environment.
func (c Environ) GoCmd(gocmd string, args ...string) *exec.Cmd {
goBin := filepath.Join(c.GOROOT, "bin", "go")
args = append([]string{gocmd}, args...)
cmd := exec.Command(goBin, args...)
if c.GBBDEBUG {
log.Printf("GBB Go invocation: %s %s %#v", c, goBin, args)
}
cmd.Dir = c.Dir
cmd.Env = append(os.Environ(), c.Env()...)
return cmd
}

// Version returns the Go version string that runtime.Version would return for
// the Go compiler in this environ.
func (c Environ) Version() (string, error) {
cmd := c.GoCmd("version")
v, err := cmd.CombinedOutput()
if err != nil {
return "", err
}
s := strings.Fields(string(v))
if len(s) < 3 {
return "", fmt.Errorf("unknown go version, tool returned weird output for 'go version': %v", string(v))
}
return s[2], nil
}

func (c Environ) envCommon() []string {
var env []string
if c.GOARCH != "" {
Expand Down Expand Up @@ -300,54 +281,6 @@ func (b *BuildOpts) RegisterFlags(f *flag.FlagSet) {
f.Var((*uflag.Strings)(&b.ExtraArgs), "go-extra-args", "Extra args to 'go build'")
}

func (c Environ) build(dirPath string, binaryPath string, pattern []string, opts *BuildOpts) error {
args := []string{
// Force rebuilding of packages.
"-a",

"-o", binaryPath,
}
if c.GO111MODULE != "off" && len(c.Mod) > 0 {
args = append(args, "-mod", string(c.Mod))
}
if c.InstallSuffix != "" {
args = append(args, "-installsuffix", c.Context.InstallSuffix)
}
if opts == nil || !opts.EnableInlining {
// Disable "function inlining" to get a (likely) smaller binary.
args = append(args, "-gcflags=all=-l")
}
if opts == nil || !opts.NoStrip {
// Strip all symbols, and don't embed a Go build ID to be reproducible.
args = append(args, "-ldflags", "-s -w -buildid=")
}
if opts == nil || !opts.NoTrimPath {
// Reproducible builds: Trim any GOPATHs out of the executable's
// debugging information.
//
// E.g. Trim /tmp/bb-*/ from /tmp/bb-12345567/src/github.com/...
args = append(args, "-trimpath")
}
if opts != nil {
args = append(args, opts.ExtraArgs...)
}

if len(c.BuildTags) > 0 {
args = append(args, []string{"-tags", strings.Join(c.BuildTags, " ")}...)
}
args = append(args, pattern...)

cmd := c.GoCmd("build", args...)
if dirPath != "" {
cmd.Dir = dirPath
}

if o, err := cmd.CombinedOutput(); err != nil {
return fmt.Errorf("error building go package in %q: %v, %v", dirPath, string(o), err)
}
return nil
}

// BuildDir compiles the package in the directory `dirPath`, writing the build
// object to `binaryPath`.
func (c Environ) BuildDir(dirPath string, binaryPath string, opts *BuildOpts) error {
Expand Down
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