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path: root/src/pkg/go/build/build.go
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Diffstat (limited to 'src/pkg/go/build/build.go')
-rw-r--r--src/pkg/go/build/build.go234
1 files changed, 195 insertions, 39 deletions
diff --git a/src/pkg/go/build/build.go b/src/pkg/go/build/build.go
index 3cb8efe47..d83a6666e 100644
--- a/src/pkg/go/build/build.go
+++ b/src/pkg/go/build/build.go
@@ -11,34 +11,61 @@ import (
"fmt"
"os"
"path/filepath"
+ "regexp"
"runtime"
"strings"
)
-func (d *DirInfo) Build(targ string) ([]*Cmd, os.Error) {
- b := &build{obj: "_obj/"}
+// Build produces a build Script for the given package.
+func Build(tree *Tree, pkg string, info *DirInfo) (*Script, os.Error) {
+ s := &Script{}
+ b := &build{
+ script: s,
+ path: filepath.Join(tree.SrcDir(), pkg),
+ }
+ b.obj = b.abs("_obj") + string(filepath.Separator)
- goarch := runtime.GOARCH
+ b.goarch = runtime.GOARCH
if g := os.Getenv("GOARCH"); g != "" {
- goarch = g
+ b.goarch = g
}
var err os.Error
- b.arch, err = ArchChar(goarch)
+ b.arch, err = ArchChar(b.goarch)
if err != nil {
return nil, err
}
- var gofiles = d.GoFiles // .go files to be built with gc
- var ofiles []string // *.GOARCH files to be linked or packed
+ // add import object files to list of Inputs
+ for _, pkg := range info.Imports {
+ t, p, err := FindTree(pkg)
+ if err != nil && err != ErrNotFound {
+ // FindTree should always be able to suggest an import
+ // path and tree. The path must be malformed
+ // (for example, an absolute or relative path).
+ return nil, os.NewError("build: invalid import: " + pkg)
+ }
+ s.addInput(filepath.Join(t.PkgDir(), p+".a"))
+ }
+
+ // .go files to be built with gc
+ gofiles := b.abss(info.GoFiles...)
+ s.addInput(gofiles...)
+
+ var ofiles []string // object files to be linked or packed
// make build directory
b.mkdir(b.obj)
+ s.addIntermediate(b.obj)
// cgo
- if len(d.CgoFiles) > 0 {
- outGo, outObj := b.cgo(d.CgoFiles)
+ if len(info.CgoFiles) > 0 {
+ cgoFiles := b.abss(info.CgoFiles...)
+ s.addInput(cgoFiles...)
+ outGo, outObj := b.cgo(cgoFiles)
gofiles = append(gofiles, outGo...)
ofiles = append(ofiles, outObj...)
+ s.addIntermediate(outGo...)
+ s.addIntermediate(outObj...)
}
// compile
@@ -46,31 +73,136 @@ func (d *DirInfo) Build(targ string) ([]*Cmd, os.Error) {
ofile := b.obj + "_go_." + b.arch
b.gc(ofile, gofiles...)
ofiles = append(ofiles, ofile)
+ s.addIntermediate(ofile)
}
// assemble
- for _, sfile := range d.SFiles {
+ for _, sfile := range info.SFiles {
ofile := b.obj + sfile[:len(sfile)-1] + b.arch
+ sfile = b.abs(sfile)
+ s.addInput(sfile)
b.asm(ofile, sfile)
ofiles = append(ofiles, ofile)
+ s.addIntermediate(ofile)
}
if len(ofiles) == 0 {
return nil, os.NewError("make: no object files to build")
}
- if d.IsCommand() {
+ // choose target file
+ var targ string
+ if info.IsCommand() {
+ // use the last part of the import path as binary name
+ _, bin := filepath.Split(pkg)
+ if runtime.GOOS == "windows" {
+ bin += ".exe"
+ }
+ targ = filepath.Join(tree.BinDir(), bin)
+ } else {
+ targ = filepath.Join(tree.PkgDir(), pkg+".a")
+ }
+
+ // make target directory
+ targDir, _ := filepath.Split(targ)
+ b.mkdir(targDir)
+
+ // link binary or pack object
+ if info.IsCommand() {
b.ld(targ, ofiles...)
} else {
b.gopack(targ, ofiles...)
}
+ s.Output = append(s.Output, targ)
+
+ return b.script, nil
+}
+
+// A Script describes the build process for a Go package.
+// The Input, Intermediate, and Output fields are lists of absolute paths.
+type Script struct {
+ Cmd []*Cmd
+ Input []string
+ Intermediate []string
+ Output []string
+}
+
+func (s *Script) addInput(file ...string) {
+ s.Input = append(s.Input, file...)
+}
+
+func (s *Script) addIntermediate(file ...string) {
+ s.Intermediate = append(s.Intermediate, file...)
+}
+
+// Run runs the Script's Cmds in order.
+func (s *Script) Run() os.Error {
+ for _, c := range s.Cmd {
+ if err := c.Run(); err != nil {
+ return err
+ }
+ }
+ return nil
+}
+
+// Stale returns true if the build's inputs are newer than its outputs.
+func (s *Script) Stale() bool {
+ var latest int64
+ // get latest mtime of outputs
+ for _, file := range s.Output {
+ fi, err := os.Stat(file)
+ if err != nil {
+ // any error reading output files means stale
+ return true
+ }
+ if m := fi.Mtime_ns; m > latest {
+ latest = m
+ }
+ }
+ for _, file := range s.Input {
+ fi, err := os.Stat(file)
+ if err != nil || fi.Mtime_ns > latest {
+ // any error reading input files means stale
+ // (attempt to rebuild to figure out why)
+ return true
+ }
+ }
+ return false
+}
+
+// Clean removes the Script's Intermediate files.
+// It tries to remove every file and returns the first error it encounters.
+func (s *Script) Clean() (err os.Error) {
+ // Reverse order so that directories get removed after the files they contain.
+ for i := len(s.Intermediate) - 1; i >= 0; i-- {
+ if e := os.Remove(s.Intermediate[i]); err == nil {
+ err = e
+ }
+ }
+ return
+}
- return b.cmds, nil
+// Clean removes the Script's Intermediate and Output files.
+// It tries to remove every file and returns the first error it encounters.
+func (s *Script) Nuke() (err os.Error) {
+ // Reverse order so that directories get removed after the files they contain.
+ for i := len(s.Output) - 1; i >= 0; i-- {
+ if e := os.Remove(s.Output[i]); err == nil {
+ err = e
+ }
+ }
+ if e := s.Clean(); err == nil {
+ err = e
+ }
+ return
}
+// A Cmd describes an individual build command.
type Cmd struct {
Args []string // command-line
Stdout string // write standard output to this file, "" is passthrough
+ Dir string // working directory
+ Env []string // environment
Input []string // file paths (dependencies)
Output []string // file paths
}
@@ -79,14 +211,16 @@ func (c *Cmd) String() string {
return strings.Join(c.Args, " ")
}
-func (c *Cmd) Run(dir string) os.Error {
+// Run executes the Cmd.
+func (c *Cmd) Run() os.Error {
out := new(bytes.Buffer)
cmd := exec.Command(c.Args[0], c.Args[1:]...)
- cmd.Dir = dir
+ cmd.Dir = c.Dir
+ cmd.Env = c.Env
cmd.Stdout = out
cmd.Stderr = out
if c.Stdout != "" {
- f, err := os.Create(filepath.Join(dir, c.Stdout))
+ f, err := os.Create(c.Stdout)
if err != nil {
return err
}
@@ -99,15 +233,6 @@ func (c *Cmd) Run(dir string) os.Error {
return nil
}
-func (c *Cmd) Clean(dir string) (err os.Error) {
- for _, fn := range c.Output {
- if e := os.RemoveAll(fn); err == nil {
- err = e
- }
- }
- return
-}
-
// ArchChar returns the architecture character for the given goarch.
// For example, ArchChar("amd64") returns "6".
func ArchChar(goarch string) (string, os.Error) {
@@ -123,13 +248,30 @@ func ArchChar(goarch string) (string, os.Error) {
}
type build struct {
- cmds []*Cmd
- obj string
- arch string
+ script *Script
+ path string
+ obj string
+ goarch string
+ arch string
+}
+
+func (b *build) abs(file string) string {
+ if filepath.IsAbs(file) {
+ return file
+ }
+ return filepath.Join(b.path, file)
+}
+
+func (b *build) abss(file ...string) []string {
+ s := make([]string, len(file))
+ for i, f := range file {
+ s[i] = b.abs(f)
+ }
+ return s
}
func (b *build) add(c Cmd) {
- b.cmds = append(b.cmds, &c)
+ b.script.Cmd = append(b.script.Cmd, &c)
}
func (b *build) mkdir(name string) {
@@ -192,7 +334,7 @@ func (b *build) cc(ofile string, cfiles ...string) {
func (b *build) gccCompile(ofile, cfile string) {
b.add(Cmd{
- Args: gccArgs(b.arch, "-o", ofile, "-c", cfile),
+ Args: b.gccArgs("-o", ofile, "-c", cfile),
Input: []string{cfile},
Output: []string{ofile},
})
@@ -200,21 +342,26 @@ func (b *build) gccCompile(ofile, cfile string) {
func (b *build) gccLink(ofile string, ofiles ...string) {
b.add(Cmd{
- Args: append(gccArgs(b.arch, "-o", ofile), ofiles...),
+ Args: append(b.gccArgs("-o", ofile), ofiles...),
Input: ofiles,
Output: []string{ofile},
})
}
-func gccArgs(arch string, args ...string) []string {
+func (b *build) gccArgs(args ...string) []string {
// TODO(adg): HOST_CC
- m := "-m32"
- if arch == "6" {
- m = "-m64"
+ a := []string{"gcc", "-I", b.path, "-g", "-fPIC", "-O2"}
+ switch b.arch {
+ case "8":
+ a = append(a, "-m32")
+ case "6":
+ a = append(a, "-m64")
}
- return append([]string{"gcc", m, "-I", ".", "-g", "-fPIC", "-O2"}, args...)
+ return append(a, args...)
}
+var cgoRe = regexp.MustCompile(`[/\\:]`)
+
func (b *build) cgo(cgofiles []string) (outGo, outObj []string) {
// cgo
// TODO(adg): CGOPKGPATH
@@ -222,19 +369,24 @@ func (b *build) cgo(cgofiles []string) (outGo, outObj []string) {
gofiles := []string{b.obj + "_cgo_gotypes.go"}
cfiles := []string{b.obj + "_cgo_main.c", b.obj + "_cgo_export.c"}
for _, fn := range cgofiles {
- f := b.obj + fn[:len(fn)-2]
+ f := b.obj + cgoRe.ReplaceAllString(fn[:len(fn)-2], "_")
gofiles = append(gofiles, f+"cgo1.go")
cfiles = append(cfiles, f+"cgo2.c")
}
defunC := b.obj + "_cgo_defun.c"
- output := append([]string{defunC}, gofiles...)
- output = append(output, cfiles...)
+ output := append([]string{defunC}, cfiles...)
+ output = append(output, gofiles...)
b.add(Cmd{
Args: append([]string{"cgo", "--"}, cgofiles...),
+ Dir: b.path,
+ Env: append(os.Environ(), "GOARCH="+b.goarch),
Input: cgofiles,
Output: output,
})
outGo = append(outGo, gofiles...)
+ exportH := filepath.Join(b.path, "_cgo_export.h")
+ b.script.addIntermediate(defunC, exportH, b.obj+"_cgo_flags")
+ b.script.addIntermediate(cfiles...)
// cc _cgo_defun.c
defunObj := b.obj + "_cgo_defun." + b.arch
@@ -249,10 +401,13 @@ func (b *build) cgo(cgofiles []string) (outGo, outObj []string) {
linkobj = append(linkobj, ofile)
if !strings.HasSuffix(ofile, "_cgo_main.o") {
outObj = append(outObj, ofile)
+ } else {
+ b.script.addIntermediate(ofile)
}
}
- dynObj := b.obj + "_cgo1_.o"
+ dynObj := b.obj + "_cgo_.o"
b.gccLink(dynObj, linkobj...)
+ b.script.addIntermediate(dynObj)
// cgo -dynimport
importC := b.obj + "_cgo_import.c"
@@ -262,6 +417,7 @@ func (b *build) cgo(cgofiles []string) (outGo, outObj []string) {
Input: []string{dynObj},
Output: []string{importC},
})
+ b.script.addIntermediate(importC)
// cc _cgo_import.ARCH
importObj := b.obj + "_cgo_import." + b.arch
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-25 19:26:02 +0000