96 lines
2.3 KiB
Go
96 lines
2.3 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gccgoimporter
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import (
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"bufio"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"golang.org/x/tools/go/types"
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)
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// Information about a specific installation of gccgo.
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type GccgoInstallation struct {
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// Version of gcc (e.g. 4.8.0).
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GccVersion string
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// Target triple (e.g. x86_64-unknown-linux-gnu).
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TargetTriple string
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// Built-in library paths used by this installation.
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LibPaths []string
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}
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// Ask the driver at the given path for information for this GccgoInstallation.
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func (inst *GccgoInstallation) InitFromDriver(gccgoPath string) (err error) {
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cmd := exec.Command(gccgoPath, "-###", "-S", "-x", "go", "-")
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stderr, err := cmd.StderrPipe()
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if err != nil {
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return
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}
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err = cmd.Start()
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if err != nil {
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return
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}
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scanner := bufio.NewScanner(stderr)
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for scanner.Scan() {
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line := scanner.Text()
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switch {
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case strings.HasPrefix(line, "Target: "):
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inst.TargetTriple = line[8:]
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case line[0] == ' ':
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args := strings.Fields(line)
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for _, arg := range args[1:] {
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if strings.HasPrefix(arg, "-L") {
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inst.LibPaths = append(inst.LibPaths, arg[2:])
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}
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}
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}
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}
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stdout, err := exec.Command(gccgoPath, "-dumpversion").Output()
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if err != nil {
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return
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}
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inst.GccVersion = strings.TrimSpace(string(stdout))
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return
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}
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// Return the list of export search paths for this GccgoInstallation.
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func (inst *GccgoInstallation) SearchPaths() (paths []string) {
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for _, lpath := range inst.LibPaths {
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spath := filepath.Join(lpath, "go", inst.GccVersion)
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fi, err := os.Stat(spath)
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if err != nil || !fi.IsDir() {
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continue
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}
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paths = append(paths, spath)
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spath = filepath.Join(spath, inst.TargetTriple)
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fi, err = os.Stat(spath)
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if err != nil || !fi.IsDir() {
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continue
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}
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paths = append(paths, spath)
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}
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paths = append(paths, inst.LibPaths...)
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return
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}
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// Return an importer that searches incpaths followed by the gcc installation's
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// built-in search paths and the current directory.
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func (inst *GccgoInstallation) GetImporter(incpaths []string, initmap map[*types.Package]InitData) types.Importer {
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return GetImporter(append(append(incpaths, inst.SearchPaths()...), "."), initmap)
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}
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