func compile(bp *build.Package) error {
if ok, err := checkPkg(bp); err != nil {
return err
} else if ok {
return nil
}
if verbosity > 0 {
defer fmt.Println(bp.ImportPath)
}
// Parse
flist := make([]*ast.File, 0, len(bp.GoFiles)+1)
fset := token.NewFileSet()
for _, fname := range bp.GoFiles {
fname = filepath.Join(bp.Dir, fname)
f, err := parser.ParseFile(fset, fname, nil, 0)
if err != nil {
return err
}
flist = append(flist, f)
}
var iimp string
ppath := bp.ImportPath
if bp.Name == "main" {
ppath = "main"
iimp = `_ "runtime";_ "builtin"`
} else if bp.ImportPath != "builtin" {
iimp = `_ "builtin"`
}
f, err := parser.ParseFile(
fset,
"_iimports.go",
"package "+bp.Name+";import("+iimp+")",
0,
)
if err != nil {
return err
}
flist = append(flist, f)
// Type check
tc := &types.Config{
Import: NewImporter().Import,
Sizes: &types.StdSizes{4, 4}, // BUG: set sizes based on EGARCH
}
ti := &types.Info{
Types: make(map[ast.Expr]types.TypeAndValue),
Defs: make(map[*ast.Ident]types.Object),
Uses: make(map[*ast.Ident]types.Object),
Selections: make(map[*ast.SelectorExpr]*types.Selection),
}
pkg, err := tc.Check(ppath, fset, flist, ti)
if err != nil {
return err
}
// Translate to C
work := filepath.Join(tmpDir, ppath)
if err = os.MkdirAll(work, 0700); err != nil {
return err
}
var (
hpath string
objs []string
)
if ppath == "main" {
hpath = filepath.Join(bp.Dir, "_.h")
} else {
hpath = filepath.Join(bp.PkgRoot, buildCtx.GOOS+"_"+buildCtx.GOARCH, ppath+".h")
expath := filepath.Join(work, "__.EXPORTS")
impath := filepath.Join(work, "__.IMPORTS")
objs = append(objs, expath, impath, hpath)
err = os.MkdirAll(filepath.Dir(hpath), 0755)
if err != nil && !os.IsExist(err) {
return err
}
wp, err := os.Create(expath)
if err != nil {
return err
}
edata := importer.ExportData(pkg)
_, err = wp.Write(edata)
if err != nil {
return err
}
wp.Close()
wp, err = os.Create(impath)
if err != nil {
return err
}
for _, p := range pkg.Imports() {
if _, err := io.WriteString(wp, p.Path()+"\n"); err != nil {
return err
}
}
wp.Close()
}
wh, err := os.Create(hpath)
if err != nil {
return err
}
defer wh.Close()
wc, err := os.Create(filepath.Join(bp.Dir, "_.c"))
if err != nil {
return err
}
defer wc.Close()
up := strings.Replace(ppath, "/", "$", -1)
_, err = io.WriteString(wh, "#ifndef "+up+"\n#define "+up+"\n\n")
if err != nil {
return err
}
gtc := gotoc.NewGTC(pkg, ti)
gtc.SetInlineThres(12)
if err = gtc.Translate(wh, wc, flist); err != nil {
return err
}
for _, h := range bp.HFiles {
if !strings.HasSuffix(h, "+.h") {
continue
}
f, err := os.Open(filepath.Join(bp.Dir, h))
if err != nil {
return err
}
if _, err = io.WriteString(wh, "\n// included "+h+"\n"); err != nil {
return err
}
if _, err = bufio.NewReader(f).WriteTo(wh); err != nil {
return err
}
}
if _, err = io.WriteString(wh, "\n#endif\n"); err != nil {
return err
}
var csfiles = []string{"_.c"}
for _, c := range bp.CFiles {
if !strings.HasSuffix(c, "+.c") {
csfiles = append(csfiles, c)
continue
}
f, err := os.Open(filepath.Join(bp.Dir, c))
if err != nil {
return err
}
if _, err = io.WriteString(wc, "\n// included "+c+"\n"); err != nil {
return err
}
if _, err = bufio.NewReader(f).WriteTo(wc); err != nil {
return err
}
}
csfiles = append(csfiles, bp.SFiles...)
// Build (package or binary)
bt, err := NewBuildTools(&buildCtx)
if err != nil {
return err
}
if verbosity > 1 {
bt.Log = os.Stdout
}
for _, c := range csfiles {
// TODO: avoid recompile up to date objects
o := filepath.Join(work, c[:len(c)-1]+"o")
c = filepath.Join(bp.Dir, c)
if err = bt.Compile(o, c); err != nil {
return err
}
objs = append(objs, o)
}
if ppath != "main" {
if err := bt.Archive(hpath[:len(hpath)-1]+"a", objs...); err != nil {
return err
}
now := time.Now()
return os.Chtimes(hpath, now, now)
}
imports := make([]string, len(pkg.Imports()))
for i, p := range pkg.Imports() {
imports[i] = p.Path()
}
return bt.Link(filepath.Join(bp.Dir, mainbin), imports, objs...)
}
// Export generates a file containing package export data
// suitable for importing with Importer.Import.
func Export(ctx *build.Context, pkg *types.Package) error {
exportsPath := packageExportsFile(ctx, pkg.Path())
err := os.MkdirAll(filepath.Dir(exportsPath), 0755)
if err != nil && !os.IsExist(err) {
return err
}
tracef("Writing import data to %q", exportsPath)
return ioutil.WriteFile(exportsPath, importer.ExportData(pkg), 0644)
}