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go: implement build, install, run

Browse Source 
clean is gone; all the intermediate files are created
in a temporary tree that is wiped when the command ends.

Not using go/build's Script because it is not well aligned
with this API.  The various builder methods are copied from
go/build and adapted.  Probably once we delete goinstall
we can delete the Script API too.

R=rogpeppe, adg, adg
CC=golang-dev
https://golang.org/cl/5483069
This commit is contained in:
Russ Cox 2011-12-14 22:42:42 -05:00
parent 24e9683ae6
commit 2ad8a9c507
10 changed files with 778 additions and 82 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
src/cmd/cgo/gcc.go
View File

@ -729,7 +729,9 @@ func (p *Package) gccMachine() []string {
return nil
}
var gccTmp = objDir + "_cgo_.o"
func gccTmp() string {
return *objDir + "_cgo_.o"
}
// gccCmd returns the gcc command line to use for compiling
// the input.
@ -738,7 +740,7 @@ func (p *Package) gccCmd() []string {
p.gccName(),
"-Wall", // many warnings
"-Werror", // warnings are errors
"-o" + gccTmp, // write object to tmp
"-o" + gccTmp(), // write object to tmp
"-gdwarf-2", // generate DWARF v2 debugging symbols
"-fno-eliminate-unused-debug-types", // gets rid of e.g. untyped enum otherwise
"-c", // do not link
@ -755,10 +757,10 @@ func (p *Package) gccCmd() []string {
func (p *Package) gccDebug(stdin []byte) (*dwarf.Data, binary.ByteOrder, []byte) {
runGcc(stdin, p.gccCmd())
if f, err := macho.Open(gccTmp); err == nil {
if f, err := macho.Open(gccTmp()); err == nil {
d, err := f.DWARF()
if err != nil {
fatalf("cannot load DWARF output from %s: %v", gccTmp, err)
fatalf("cannot load DWARF output from %s: %v", gccTmp(), err)
}
var data []byte
if f.Symtab != nil {
@ -784,23 +786,23 @@ func (p *Package) gccDebug(stdin []byte) (*dwarf.Data, binary.ByteOrder, []byte)
// Can skip debug data block in ELF and PE for now.
// The DWARF information is complete.
if f, err := elf.Open(gccTmp); err == nil {
if f, err := elf.Open(gccTmp()); err == nil {
d, err := f.DWARF()
if err != nil {
fatalf("cannot load DWARF output from %s: %v", gccTmp, err)
fatalf("cannot load DWARF output from %s: %v", gccTmp(), err)
}
return d, f.ByteOrder, nil
}
if f, err := pe.Open(gccTmp); err == nil {
if f, err := pe.Open(gccTmp()); err == nil {
d, err := f.DWARF()
if err != nil {
fatalf("cannot load DWARF output from %s: %v", gccTmp, err)
fatalf("cannot load DWARF output from %s: %v", gccTmp(), err)
}
return d, binary.LittleEndian, nil
}
fatalf("cannot parse gcc output %s as ELF, Mach-O, PE object", gccTmp)
fatalf("cannot parse gcc output %s as ELF, Mach-O, PE object", gccTmp())
panic("not reached")
}

12
src/cmd/cgo/main.go
View File

@ -123,12 +123,14 @@ var cPrefix string
var fset = token.NewFileSet()
var dynobj = flag.String("dynimport", "", "if non-empty, print dynamic import data for that file")
var dynout = flag.String("dynout", "", "write -dynobj output to this file")
// These flags are for bootstrapping a new Go implementation,
// to generate Go and C headers that match the data layout and
// constant values used in the host's C libraries and system calls.
var godefs = flag.Bool("godefs", false, "for bootstrap: write Go definitions for C file to standard output")
var cdefs = flag.Bool("cdefs", false, "for bootstrap: write C definitions for C file to standard output")
var objDir = flag.String("objdir", "", "object directory")
var gccgo = flag.Bool("gccgo", false, "generate files for use with gccgo")
@ -202,9 +204,13 @@ func main() {
fs[i] = f
}
// make sure that _obj directory exists, so that we can write
// all the output files there.
os.Mkdir("_obj", 0777)
if *objDir == "" {
// make sure that _obj directory exists, so that we can write
// all the output files there.
os.Mkdir("_obj", 0777)
*objDir = "_obj"
}
*objDir += string(filepath.Separator)
for i, input := range goFiles {
f := fs[i]

36
src/cmd/cgo/out.go
View File

@ -14,20 +14,17 @@ import (
"go/printer"
"go/token"
"os"
"path/filepath"
"strings"
)
var objDir = "_obj" + string(filepath.Separator)
// writeDefs creates output files to be compiled by 6g, 6c, and gcc.
// (The comments here say 6g and 6c but the code applies to the 8 and 5 tools too.)
func (p *Package) writeDefs() {
fgo2 := creat(objDir + "_cgo_gotypes.go")
fc := creat(objDir + "_cgo_defun.c")
fm := creat(objDir + "_cgo_main.c")
fgo2 := creat(*objDir + "_cgo_gotypes.go")
fc := creat(*objDir + "_cgo_defun.c")
fm := creat(*objDir + "_cgo_main.c")
fflg := creat(objDir + "_cgo_flags")
fflg := creat(*objDir + "_cgo_flags")
for k, v := range p.CgoFlags {
fmt.Fprintf(fflg, "_CGO_%s=%s\n", k, v)
}
@ -109,6 +106,15 @@ func (p *Package) writeDefs() {
}
func dynimport(obj string) {
stdout := os.Stdout
if *dynout != "" {
f, err := os.Create(*dynout)
if err != nil {
fatalf("%s", err)
}
stdout = f
}
if f, err := elf.Open(obj); err == nil {
sym, err := f.ImportedSymbols()
if err != nil {
@ -119,14 +125,14 @@ func dynimport(obj string) {
if s.Version != "" {
targ += "@" + s.Version
}
fmt.Printf("#pragma dynimport %s %s %q\n", s.Name, targ, s.Library)
fmt.Fprintf(stdout, "#pragma dynimport %s %s %q\n", s.Name, targ, s.Library)
}
lib, err := f.ImportedLibraries()
if err != nil {
fatalf("cannot load imported libraries from ELF file %s: %v", obj, err)
}
for _, l := range lib {
fmt.Printf("#pragma dynimport _ _ %q\n", l)
fmt.Fprintf(stdout, "#pragma dynimport _ _ %q\n", l)
}
return
}
@ -140,14 +146,14 @@ func dynimport(obj string) {
if len(s) > 0 && s[0] == '_' {
s = s[1:]
}
fmt.Printf("#pragma dynimport %s %s %q\n", s, s, "")
fmt.Fprintf(stdout, "#pragma dynimport %s %s %q\n", s, s, "")
}
lib, err := f.ImportedLibraries()
if err != nil {
fatalf("cannot load imported libraries from Mach-O file %s: %v", obj, err)
}
for _, l := range lib {
fmt.Printf("#pragma dynimport _ _ %q\n", l)
fmt.Fprintf(stdout, "#pragma dynimport _ _ %q\n", l)
}
return
}
@ -159,7 +165,7 @@ func dynimport(obj string) {
}
for _, s := range sym {
ss := strings.Split(s, ":")
fmt.Printf("#pragma dynimport %s %s %q\n", ss[0], ss[0], strings.ToLower(ss[1]))
fmt.Fprintf(stdout, "#pragma dynimport %s %s %q\n", ss[0], ss[0], strings.ToLower(ss[1]))
}
return
}
@ -307,8 +313,8 @@ func (p *Package) writeOutput(f *File, srcfile string) {
base = base[0 : len(base)-3]
}
base = strings.Map(slashToUnderscore, base)
fgo1 := creat(objDir + base + ".cgo1.go")
fgcc := creat(objDir + base + ".cgo2.c")
fgo1 := creat(*objDir + base + ".cgo1.go")
fgcc := creat(*objDir + base + ".cgo2.c")
p.GoFiles = append(p.GoFiles, base+".cgo1.go")
p.GccFiles = append(p.GccFiles, base+".cgo2.c")
@ -383,7 +389,7 @@ func (p *Package) writeOutputFunc(fgcc *os.File, n *Name) {
// Write out the various stubs we need to support functions exported
// from Go so that they are callable from C.
func (p *Package) writeExports(fgo2, fc, fm *os.File) {
fgcc := creat(objDir + "_cgo_export.c")
fgcc := creat(*objDir + "_cgo_export.c")
fgcch := creat("_cgo_export.h")
fmt.Fprintf(fgcch, "/* Created by cgo - DO NOT EDIT. */\n")

2
src/cmd/go/Makefile
View File

@ -7,7 +7,6 @@ include ../../Make.inc
TARG=go
GOFILES=\
build.go\
clean.go\
fix.go\
get.go\
fmt.go\
@ -15,6 +14,7 @@ GOFILES=\
list.go\
main.go\
pkg.go\
run.go\
test.go\
version.go\
vet.go\

589
src/cmd/go/build.go
View File

@ -4,14 +4,38 @@
package main
import (
"bytes"
"fmt"
"go/build"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"regexp"
"runtime"
"strings"
)
// Break init cycles
func init() {
cmdBuild.Run = runBuild
cmdInstall.Run = runInstall
}
var cmdBuild = &Command{
Run: runBuild,
UsageLine: "build [-n] [-v] [importpath...]",
Short: "compile and install packages and dependencies",
UsageLine: "build [-a] [-n] [-v] [importpath... | gofiles...]",
Short: "compile packages and dependencies",
Long: `
Build compiles the packages named by the import paths,
along with their dependencies, but it does not install the results.
If the arguments are a list of .go files, build compiles them into
a package object or command executable named for the first
source file.
The -a flag forces rebuilding of packages that are already up-to-date.
The -n flag prints the commands but does not run them.
The -v flag prints the commands.
@ -21,23 +45,34 @@ See also: go install, go get, go clean.
`,
}
var buildA = cmdBuild.Flag.Bool("a", false, "")
var buildN = cmdBuild.Flag.Bool("n", false, "")
var buildV = cmdBuild.Flag.Bool("v", false, "")
func runBuild(cmd *Command, args []string) {
args = importPaths(args)
_ = args
panic("build not implemented")
var b builder
b.init(*buildA, *buildN, *buildV)
if len(args) > 0 && strings.HasSuffix(args[0], ".go") {
b.do(b.action(modeInstall, modeBuild, goFilesPackage(args, "")))
return
}
a := &action{f: (*builder).nop}
for _, p := range packages(args) {
a.deps = append(a.deps, b.action(modeBuild, modeBuild, p))
}
b.do(a)
}
var cmdInstall = &Command{
Run: runInstall,
UsageLine: "install [-n] [-v] [importpath...]",
Short: "install packages and dependencies",
UsageLine: "install [-a] [-n] [-v] [importpath...]",
Short: "compile and install packages and dependencies",
Long: `
Install compiles and installs the packages named by the import paths,
along with their dependencies.
The -a flag forces reinstallation of packages that are already up-to-date.
The -n flag prints the commands but does not run them.
The -v flag prints the commands.
@ -47,11 +82,541 @@ See also: go build, go get, go clean.
`,
}
var installA = cmdInstall.Flag.Bool("a", false, "")
var installN = cmdInstall.Flag.Bool("n", false, "")
var installV = cmdInstall.Flag.Bool("v", false, "")
func runInstall(cmd *Command, args []string) {
args = importPaths(args)
_ = args
panic("install not implemented")
var b builder
b.init(*installA, *installN, *installV)
a := &action{f: (*builder).nop}
for _, p := range packages(args) {
a.deps = append(a.deps, b.action(modeInstall, modeInstall, p))
}
b.do(a)
}
// A builder holds global state about a build.
// It does not hold per-package state, because eventually we will
// build packages in parallel, and the builder will be shared.
type builder struct {
work string // the temporary work directory (ends in filepath.Separator)
aflag bool // the -a flag
nflag bool // the -n flag
vflag bool // the -v flag
arch string // e.g., "6"
actionCache map[cacheKey]*action // a cache of already-constructed actions
}
// An action represents a single action in the action graph.
type action struct {
f func(*builder, *action) error // the action itself
p *Package // the package this action works on
deps []*action // actions that must happen before this one
done bool // whether the action is done (might have failed)
failed bool // whether the action failed
// Results left for communication with other code.
pkgobj string // the built .a file
pkgbin string // the built a.out file, if one exists
}
// cacheKey is the key for the action cache.
type cacheKey struct {
mode buildMode
p *Package
}
// buildMode specifies the build mode:
// are we just building things or also installing the results?
type buildMode int
const (
modeBuild buildMode = iota
modeInstall
)
func (b *builder) init(aflag, nflag, vflag bool) {
var err error
b.aflag = aflag
b.nflag = nflag
b.vflag = vflag
b.actionCache = make(map[cacheKey]*action)
b.arch, err = build.ArchChar(build.DefaultContext.GOARCH)
if err != nil {
fatalf("%s", err)
}
if nflag {
b.work = "$WORK"
} else {
b.work, err = ioutil.TempDir("", "go-build")
if err != nil {
fatalf("%s", err)
}
if vflag {
fmt.Printf("WORK=%s\n", b.work)
}
atexit(func() { os.RemoveAll(b.work) })
}
}
// goFilesPackage creates a package for building a collection of Go files
// (typically named on the command line). If target is given, the package
// target is target. Otherwise, the target is named p.a for
// package p or named after the first Go file for package main.
func goFilesPackage(gofiles []string, target string) *Package {
// Synthesize fake "directory" that only shows those two files,
// to make it look like this is a standard package or
// command directory.
var dir []os.FileInfo
for _, file := range gofiles {
fi, err := os.Stat(file)
if err != nil {
fatalf("%s", err)
}
if fi.IsDir() {
fatalf("%s is a directory, should be a Go file", file)
}
dir = append(dir, fi)
}
ctxt := build.DefaultContext
ctxt.ReadDir = func(string) ([]os.FileInfo, error) { return dir, nil }
pwd, _ := os.Getwd()
pkg, err := scanPackage(&ctxt, &build.Tree{Path: "."}, "<command line>", "<command line>", pwd)
if err != nil {
fatalf("%s", err)
}
if target != "" {
pkg.targ = target
} else if pkg.Name == "main" {
pkg.targ = gofiles[0][:len(gofiles[0])-len(".go")]
} else {
pkg.targ = pkg.Name + ".a"
}
pkg.ImportPath = "_/" + pkg.targ
return pkg
}
// action returns the action for applying the given operation (mode) to the package.
// depMode is the action to use when building dependencies.
func (b *builder) action(mode buildMode, depMode buildMode, p *Package) *action {
key := cacheKey{mode, p}
a := b.actionCache[key]
if a != nil {
return a
}
a = &action{p: p}
b.actionCache[key] = a
switch mode {
case modeBuild, modeInstall:
if !needInstall(p) && !b.aflag {
a.f = (*builder).nop
return a
}
if p.Standard {
switch p.ImportPath {
case "runtime", "runtime/cgo":
// Too complex - can't build.
a.f = (*builder).nop
return a
case "builtin", "unsafe":
// Fake packages - nothing to build.
a.f = (*builder).nop
return a
}
}
if mode == modeInstall {
a.f = (*builder).install
a.deps = []*action{b.action(modeBuild, depMode, p)}
return a
}
a.f = (*builder).build
for _, p1 := range p.imports {
a.deps = append(a.deps, b.action(depMode, depMode, p1))
}
}
return a
}
// needInstall reports whether p needs to be built and installed.
// That is only true if some source file is newer than the installed package binary.
func needInstall(p *Package) bool {
if p.targ == "" {
return true
}
fi, err := os.Stat(p.targ)
if err != nil {
return true
}
t := fi.ModTime()
srcss := [][]string{
p.GoFiles,
p.CFiles,
p.SFiles,
p.CgoFiles,
}
for _, srcs := range srcss {
for _, src := range srcs {
fi, err := os.Stat(filepath.Join(p.Dir, src))
if err != nil {
return true
}
if fi.ModTime().After(t) {
return true
}
}
}
return false
}
// do runs the action graph rooted at a.
func (b *builder) do(a *action) {
if a.done {
return
}
for _, a1 := range a.deps {
b.do(a1)
if a1.failed {
a.failed = true
a.done = true
return
}
}
if err := a.f(b, a); err != nil {
errorf("%s", err)
a.failed = true
}
a.done = true
}
func (b *builder) nop(a *action) error {
return nil
}
// build is the action for building a single package.
func (b *builder) build(a *action) error {
obj := filepath.Join(b.work, filepath.FromSlash(a.p.ImportPath+"/_obj")) + string(filepath.Separator)
a.pkgobj = filepath.Join(b.work, filepath.FromSlash(a.p.ImportPath+".a"))
// make build directory
if err := b.mkdir(obj); err != nil {
return err
}
var objects []string
var gofiles []string
gofiles = append(gofiles, a.p.GoFiles...)
// run cgo
if len(a.p.CgoFiles) > 0 {
outGo, outObj, err := b.cgo(a.p.Dir, obj, a.p.info)
if err != nil {
return err
}
objects = append(objects, outObj...)
gofiles = append(gofiles, outGo...)
}
// prepare Go import path list
var inc []string
inc = append(inc, "-I", b.work)
incMap := map[string]bool{}
for _, a1 := range a.deps {
p1 := a1.p
if p1.t.Goroot {
continue
}
pkgdir := p1.t.PkgDir()
if !incMap[pkgdir] {
incMap[pkgdir] = true
inc = append(inc, "-I", pkgdir)
}
}
// compile Go
if len(gofiles) > 0 {
out := "_go_.6"
if err := b.gc(a.p.Dir, obj+out, a.p.ImportPath, inc, gofiles); err != nil {
return err
}
objects = append(objects, out)
}
// assemble .s files
if len(a.p.SFiles) > 0 {
for _, sfile := range a.p.SFiles {
out := sfile[:len(sfile)-len(".s")] + "." + b.arch
if err := b.asm(a.p.Dir, obj+out, sfile); err != nil {
return err
}
objects = append(objects, out)
}
}
// pack into archive
if err := b.gopack(obj, a.pkgobj, objects); err != nil {
return err
}
if a.p.Name == "main" {
// command.
// import paths for compiler are introduced by -I.
// for linker, they are introduced by -L.
for i := 0; i < len(inc); i += 2 {
inc[i] = "-L"
}
a.pkgbin = obj + "a.out"
if err := b.ld(a.p.Dir, a.pkgbin, inc, a.pkgobj); err != nil {
return err
}
}
return nil
}
// install is the action for installing a single package.
func (b *builder) install(a *action) error {
if err := b.build(a); err != nil {
return err
}
var src string
var perm uint32
if a.pkgbin != "" {
src = a.pkgbin
perm = 0777
} else {
src = a.pkgobj
perm = 0666
}
// make target directory
dst := a.p.targ
dir, _ := filepath.Split(dst)
if dir != "" {
if err := b.mkdir(dir); err != nil {
return err
}
}
return b.copyFile(dst, src, perm)
}
// copyFile is like 'cp src dst'.
func (b *builder) copyFile(dst, src string, perm uint32) error {
if b.nflag || b.vflag {
b.showcmd("cp %s %s", src, dst)
if b.nflag {
return nil
}
}
sf, err := os.Open(src)
if err != nil {
return err
}
defer sf.Close()
os.Remove(dst)
df, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
if err != nil {
return err
}
_, err = io.Copy(df, sf)
df.Close()
if err != nil {
os.Remove(dst)
return err
}
return nil
}
// fmtcmd is like fmt.Sprintf but replaces references to the
// work directory (a temporary directory with a clumsy name)
// with $WORK.
func (b *builder) fmtcmd(format string, args ...interface{}) string {
s := fmt.Sprintf(format, args...)
s = strings.Replace(s, b.work, "$WORK", -1)
return s
}
// showcmd prints the given command to standard output
// for the implementation of -n or -v.
func (b *builder) showcmd(format string, args ...interface{}) {
fmt.Println(b.fmtcmd(format, args...))
}
// run runs the command given by cmdline in the directory dir.
// If the commnd fails, run prints information about the failure
// and returns a non-nil error.
func (b *builder) run(dir string, cmdline ...string) error {
if b.nflag || b.vflag {
b.showcmd("cd %s; %s", dir, strings.Join(cmdline, " "))
if b.nflag {
return nil
}
}
var buf bytes.Buffer
cmd := exec.Command(cmdline[0], cmdline[1:]...)
cmd.Stdout = &buf
cmd.Stderr = &buf
cmd.Dir = dir
// TODO: cmd.Env
err := cmd.Run()
if buf.Len() > 0 {
fmt.Fprintf(os.Stderr, "# cd %s; %s\n", dir, strings.Join(cmdline, " "))
fmt.Fprintf(os.Stderr, "%s\n", buf.Bytes())
}
return err
}
// mkdir makes the named directory.
func (b *builder) mkdir(dir string) error {
if b.nflag || b.vflag {
b.showcmd("mkdir -p %s", dir)
if b.nflag {
return nil
}
}
if err := os.MkdirAll(dir, 0777); err != nil {
return err
}
return nil
}
// gc runs the Go compiler in a specific directory on a set of files
// to generate the named output file.
func (b *builder) gc(dir, ofile, importPath string, importArgs []string, gofiles []string) error {
args := append([]string{b.arch + "g", "-o", ofile, "-p", importPath}, importArgs...)
args = append(args, gofiles...)
return b.run(dir, args...)
}
// asm runs the assembler in a specific directory on a specific file
// to generate the named output file.
func (b *builder) asm(dir, ofile, sfile string) error {
return b.run(dir, b.arch+"a", "-o", ofile, sfile)
}
// gopack runs the assembler in a specific directory to create
// an archive from a set of object files.
// typically it is run in the object directory.
func (b *builder) gopack(objDir, afile string, ofiles []string) error {
return b.run(objDir, append([]string{"gopack", "grc", afile}, ofiles...)...)
}
// ld runs the linker to create a package starting at mainpkg.
func (b *builder) ld(dir, out string, importArgs []string, mainpkg string) error {
return b.run(dir, append(append([]string{b.arch + "l", "-o", out}, importArgs...), mainpkg)...)
}
// cc runs the gc-toolchain C compiler in a directory on a C file
// to produce an output file.
func (b *builder) cc(dir, ofile, cfile string) error {
inc := filepath.Join(runtime.GOROOT(), "pkg",
fmt.Sprintf("%s_%s", build.DefaultContext.GOOS, build.DefaultContext.GOARCH))
return b.run(dir, b.arch+"c", "-FVW", "-I", inc, "-o", ofile, cfile)
}
// gcc runs the gcc C compiler to create an object from a single C file.
func (b *builder) gcc(dir, out string, flags []string, cfile string) error {
return b.run(dir, b.gccCmd(dir, flags, "-o", out, "-c", cfile)...)
}
// gccld runs the gcc linker to create an executable from a set of object files
func (b *builder) gccld(dir, out string, flags []string, obj []string) error {
return b.run(dir, append(b.gccCmd(dir, flags, "-o", out), obj...)...)
}
// gccCmd returns a gcc command line ending with args
func (b *builder) gccCmd(objdir string, flags []string, args ...string) []string {
// TODO: HOST_CC?
a := []string{"gcc", "-I", objdir, "-g", "-fPIC", "-O2"}
switch b.arch {
case "8":
a = append(a, "-m32")
case "6":
a = append(a, "-m64")
}
a = append(a, flags...)
return append(a, args...)
}
var cgoRe = regexp.MustCompile(`[/\\:]`)
func (b *builder) cgo(dir, obj string, info *build.DirInfo) (outGo, outObj []string, err error) {
// cgo
// TODO: CGOPKGPATH, CGO_FLAGS?
gofiles := []string{obj + "_cgo_gotypes.go"}
cfiles := []string{"_cgo_main.c", "_cgo_export.c"}
for _, fn := range info.CgoFiles {
f := cgoRe.ReplaceAllString(fn[:len(fn)-2], "_")
gofiles = append(gofiles, obj+f+"cgo1.go")
cfiles = append(cfiles, f+"cgo2.c")
}
defunC := obj + "_cgo_defun.c"
// TODO: make cgo not depend on $GOARCH?
// TODO: make cgo write to obj
if err := b.run(dir, append([]string{"cgo", "-objdir", obj, "--"}, info.CgoFiles...)...); err != nil {
return nil, nil, err
}
outGo = append(outGo, gofiles...)
// cc _cgo_defun.c
defunObj := obj + "_cgo_defun." + b.arch
if err := b.cc(dir, defunObj, defunC); err != nil {
return nil, nil, err
}
outObj = append(outObj, defunObj)
// gcc
var linkobj []string
for _, cfile := range cfiles {
ofile := obj + cfile[:len(cfile)-1] + "o"
if err := b.gcc(dir, ofile, info.CgoCFLAGS, obj+cfile); err != nil {
return nil, nil, err
}
linkobj = append(linkobj, ofile)
if !strings.HasSuffix(ofile, "_cgo_main.o") {
outObj = append(outObj, ofile)
}
}
for _, cfile := range info.CFiles {
ofile := obj + cgoRe.ReplaceAllString(cfile[:len(cfile)-1], "_") + "o"
if err := b.gcc(dir, ofile, info.CgoCFLAGS, cfile); err != nil {
return nil, nil, err
}
linkobj = append(linkobj, ofile)
outObj = append(outObj, ofile)
}
dynobj := obj + "_cgo_.o"
if err := b.gccld(dir, dynobj, info.CgoLDFLAGS, linkobj); err != nil {
return nil, nil, err
}
// cgo -dynimport
importC := obj + "_cgo_import.c"
if err := b.run(dir, "cgo", "-objdir", obj, "-dynimport", dynobj, "-dynout", importC); err != nil {
return nil, nil, err
}
// cc _cgo_import.ARCH
importObj := obj + "_cgo_import." + b.arch
if err := b.cc(dir, importObj, importC); err != nil {
return nil, nil, err
}
outObj = append(outObj, importObj)
return outGo, outObj, nil
}

31
src/cmd/go/clean.go
View File

@ -1,31 +0,0 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
var cmdClean = &Command{
Run: runClean,
UsageLine: "clean [-nuke] [importpath...]",
Short: "remove intermediate objects",
Long: `
Clean removes intermediate object files generated during
the compilation of the packages named by the import paths,
but by default it does not remove the installed package binaries.
The -nuke flag causes clean to remove the installed package binaries too.
TODO: Clean does not clean dependencies of the packages.
TODO: Rename -nuke.
For more about import paths, see 'go help importpath'.
`,
}
var cleanNuke = cmdClean.Flag.Bool("nuke", false, "")
func runClean(cmd *Command, args []string) {
args = importPaths(args)
_ = args
panic("nuke not implemented")
}

11
src/cmd/go/list.go
View File

@ -58,12 +58,19 @@ func init() {
var listFmt = cmdList.Flag.String("f", "{{.Name}} {{.Dir}}", "")
var listJson = cmdList.Flag.Bool("json", false, "")
var nl = []byte{'\n'}
func runList(cmd *Command, args []string) {
var do func(*Package)
if *listJson {
enc := json.NewEncoder(os.Stdout)
do = func(p *Package) { enc.Encode(p) }
do = func(p *Package) {
b, err := json.MarshalIndent(p, "", "\t")
if err != nil {
fatalf("%s", err)
}
os.Stdout.Write(b)
os.Stdout.Write(nl)
}
} else {
tmpl, err := template.New("main").Parse(*listFmt + "\n")
if err != nil {

78
src/cmd/go/main.go
View File

@ -7,10 +7,12 @@ package main
import (
"flag"
"fmt"
"go/build"
"io"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
"text/template"
)
@ -56,13 +58,13 @@ func (c *Command) Usage() {
// The order here is the order in which they are printed by 'go help'.
var commands = []*Command{
cmdBuild,
cmdClean,
cmdDoc,
cmdFix,
cmdFmt,
cmdGet,
cmdInstall,
cmdList,
cmdRun,
cmdTest,
cmdVersion,
cmdVet,
@ -95,7 +97,7 @@ func main() {
cmd.Flag.Parse(args[1:])
args = cmd.Flag.Args()
cmd.Run(cmd, args)
os.Exit(exitStatus)
exit()
return
}
}
@ -173,16 +175,31 @@ func help(args []string) {
// importPaths returns the import paths to use for the given command line.
func importPaths(args []string) []string {
// TODO: "all"
if len(args) == 1 && args[0] == "all" {
return allPackages()
}
if len(args) == 0 {
return []string{"."}
}
return args
}
var atexitFuncs []func()
func atexit(f func()) {
atexitFuncs = append(atexitFuncs, f)
}
func exit() {
for _, f := range atexitFuncs {
f()
}
os.Exit(exitStatus)
}
func fatalf(format string, args ...interface{}) {
log.Printf(format, args...)
os.Exit(1)
errorf(format, args...)
exit()
}
func errorf(format string, args ...interface{}) {
@ -192,7 +209,7 @@ func errorf(format string, args ...interface{}) {
func exitIfErrors() {
if exitStatus != 0 {
os.Exit(exitStatus)
exit()
}
}
@ -204,3 +221,52 @@ func run(cmdline ...string) {
errorf("%v", err)
}
}
// allPackages returns all the packages that can be found
// under the $GOPATH directories and $GOROOT.
func allPackages() []string {
have := make(map[string]bool)
var pkgs []string
runtime := filepath.Join(build.Path[0].SrcDir(), "runtime") + string(filepath.Separator)
for _, t := range build.Path {
src := t.SrcDir() + string(filepath.Separator)
filepath.Walk(src, func(path string, fi os.FileInfo, err error) error {
if err != nil || !fi.IsDir() {
return nil
}
// Avoid testdata directory trees.
if strings.HasSuffix(path, string(filepath.Separator)+"testdata") {
return filepath.SkipDir
}
// Avoid runtime subdirectories.
if strings.HasPrefix(path, runtime) {
switch path {
case runtime + "darwin", runtime + "freebsd", runtime + "linux", runtime + "netbsd", runtime + "openbsd", runtime + "windows":
return filepath.SkipDir
}
}
_, err = build.ScanDir(path)
if err != nil {
return nil
}
name := path[len(src):]
if have[name] {
return nil
}
pkgs = append(pkgs, name)
have[name] = true
// Avoid go/build test data.
if path == filepath.Join(build.Path[0].SrcDir(), "go/build") {
return filepath.SkipDir
}
return nil
})
// TODO: Commands.
}
return pkgs
}

34
src/cmd/go/pkg.go
View File

@ -8,6 +8,7 @@ import (
"fmt"
"go/build"
"go/doc"
"os"
"path/filepath"
"sort"
"strings"
@ -40,6 +41,7 @@ type Package struct {
info *build.DirInfo
imports []*Package
gofiles []string // GoFiles+CgoFiles
targ string
}
// packageCache is a lookup cache for loadPackage,
@ -66,10 +68,21 @@ func loadPackage(arg string) (*Package, error) {
// Find basic information about package path.
t, importPath, err := build.FindTree(arg)
// Maybe it is a standard command.
if err != nil && !filepath.IsAbs(arg) && !strings.HasPrefix(arg, ".") {
goroot := build.Path[0]
p := filepath.Join(goroot.Path, "src/cmd", arg)
if st, err1 := os.Stat(p); err1 == nil && st.IsDir() {
t = goroot
importPath = "../cmd/" + arg
err = nil
}
}
if err != nil {
return nil, err
}
dir := filepath.Join(t.SrcDir(), importPath)
dir := filepath.Join(t.SrcDir(), filepath.FromSlash(importPath))
// Maybe we know the package by its directory.
if p := packageCache[dir]; p != nil {
@ -79,13 +92,25 @@ func loadPackage(arg string) (*Package, error) {
return p, nil
}
return scanPackage(&build.DefaultContext, t, arg, importPath, dir)
}
func scanPackage(ctxt *build.Context, t *build.Tree, arg, importPath, dir string) (*Package, error) {
// Read the files in the directory to learn the structure
// of the package.
info, err := build.ScanDir(dir)
info, err := ctxt.ScanDir(dir)
if err != nil {
return nil, err
}
var targ string
if info.Package == "main" {
_, elem := filepath.Split(importPath)
targ = filepath.Join(t.BinDir(), elem)
} else {
targ = filepath.Join(t.PkgDir(), filepath.FromSlash(importPath)+".a")
}
p := &Package{
Name: info.Package,
Doc: doc.CommentText(info.PackageComment),
@ -97,6 +122,9 @@ func loadPackage(arg string) (*Package, error) {
SFiles: info.SFiles,
CgoFiles: info.CgoFiles,
Standard: t.Goroot && !strings.Contains(importPath, "."),
targ: targ,
t: t,
info: info,
}
// Build list of full paths to all Go files in the package,
@ -123,7 +151,7 @@ func loadPackage(arg string) (*Package, error) {
}
p1, err := loadPackage(path)
if err != nil {
delete(packageCache, arg)
delete(packageCache, dir)
delete(packageCache, importPath)
// Add extra error detail to show full import chain.
// Always useful, but especially useful in import loops.

47
src/cmd/go/run.go Normal file
View File

@ -0,0 +1,47 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import ()
// Break init loop.
func init() {
cmdRun.Run = runRun
}
var cmdRun = &Command{
UsageLine: "run [-a] [-n] [-v] gofiles...",
Short: "compile and run Go program",
Long: `
Run compiles and runs the main package comprising the named Go source files.
The -a flag forces reinstallation of packages that are already up-to-date.
The -n flag prints the commands but does not run them.
The -v flag prints the commands.
See also: go build.
`,
}
var runA = cmdRun.Flag.Bool("a", false, "")
var runN = cmdRun.Flag.Bool("n", false, "")
var runV = cmdRun.Flag.Bool("v", false, "")
func runRun(cmd *Command, args []string) {
var b builder
b.init(*runA, *runN, *runV)
p := goFilesPackage(args, "")
p.targ = "" // force rebuild - no up-to-date copy anywhere
a1 := b.action(modeBuild, modeBuild, p)
a := &action{f: (*builder).runProgram, deps: []*action{a1}}
b.do(a)
}
// runProgram is the action for running a binary that has already
// been compiled. We ignore exit status.
func (b *builder) runProgram(a *action) error {
run(a.deps[0].pkgbin)
return nil
}