Files
llgo/internal/crosscompile/fetch.go
Li Jie 3ac881b191 feat(crosscompile): add wasi-libc support with LLGoROOT priority
- Check LLGoROOT/crosscompile/wasi-libc first before downloading
- Fallback to cached wasi-sdk download if not found locally
- Update downloadAndExtract to return wasiSdkRoot path directly

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-08-02 20:18:37 +08:00

111 lines
2.5 KiB
Go

package crosscompile
import (
"archive/tar"
"compress/gzip"
"fmt"
"io"
"net/http"
"os"
"path/filepath"
"strings"
)
func downloadAndExtract(url, dir string) (wasiSdkRoot string, err error) {
if _, err = os.Stat(dir); err == nil {
os.RemoveAll(dir)
}
tempDir := dir + ".temp"
os.RemoveAll(tempDir)
if err := os.MkdirAll(tempDir, 0755); err != nil {
return "", fmt.Errorf("failed to create temporary directory: %w", err)
}
urlPath := strings.Split(url, "/")
filename := urlPath[len(urlPath)-1]
localFile := filepath.Join(tempDir, filename)
if err = downloadFile(url, localFile); err != nil {
return "", fmt.Errorf("failed to download file: %w", err)
}
defer os.Remove(localFile)
if strings.HasSuffix(filename, ".tar.gz") || strings.HasSuffix(filename, ".tgz") {
err = extractTarGz(localFile, tempDir)
} else {
return "", fmt.Errorf("unsupported archive format: %s", filename)
}
if err != nil {
return "", fmt.Errorf("failed to extract archive: %w", err)
}
if err = os.Rename(tempDir, dir); err != nil {
return "", fmt.Errorf("failed to rename directory: %w", err)
}
wasiSdkRoot = filepath.Join(dir, "wasi-sdk-25.0-x86_64-macos")
return
}
func downloadFile(url, filepath string) error {
out, err := os.Create(filepath)
if err != nil {
return err
}
defer out.Close()
resp, err := http.Get(url)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("bad status: %s", resp.Status)
}
_, err = io.Copy(out, resp.Body)
return err
}
func extractTarGz(tarGzFile, dest string) error {
file, err := os.Open(tarGzFile)
if err != nil {
return err
}
defer file.Close()
gzr, err := gzip.NewReader(file)
if err != nil {
return err
}
defer gzr.Close()
tr := tar.NewReader(gzr)
for {
header, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
return err
}
target := filepath.Join(dest, header.Name)
if !strings.HasPrefix(target, filepath.Clean(dest)+string(os.PathSeparator)) {
return fmt.Errorf("%s: illegal file path", target)
}
switch header.Typeflag {
case tar.TypeDir:
if err := os.MkdirAll(target, 0755); err != nil {
return err
}
case tar.TypeReg:
if err := os.MkdirAll(filepath.Dir(target), 0755); err != nil {
return err
}
f, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
if err != nil {
return err
}
if _, err := io.Copy(f, tr); err != nil {
f.Close()
return err
}
f.Close()
}
}
return nil
}