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poor_mans_clone.go
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/
poor_mans_clone.go
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package git
import (
"github.com/fluxcd/go-git/v5"
"github.com/fluxcd/go-git/v5/config"
cp "github.com/otiai10/copy"
"os"
"path/filepath"
"runtime"
)
// PoorMansCloneCommit poor mans clone from a local repo, which does not rely on go-git using git-upload-pack
func PoorMansClone(sourceDir string, targetDir string, coOptions *git.CheckoutOptions) error {
err := os.MkdirAll(targetDir, 0o700)
if err != nil {
return err
}
err = os.Mkdir(filepath.Join(targetDir, ".git"), 0o700)
if err != nil {
return err
}
des, err := os.ReadDir(sourceDir)
if err != nil {
return err
}
for _, de := range des {
s := filepath.Join(sourceDir, de.Name())
d := filepath.Join(targetDir, ".git", de.Name())
if de.Name() == ".cache.lock" {
continue
}
if de.Name() == "objects" {
err = os.Symlink(s, d)
if err != nil && runtime.GOOS == "windows" {
// Windows 10 does not support symlinks as unprivileged users, so we revert to deep copying
err = cp.Copy(s, d, cp.Options{OnSymlink: func(src string) cp.SymlinkAction {
return cp.Deep
}})
}
} else {
err = cp.Copy(s, d)
}
if err != nil {
return err
}
}
gitConfigReader, err := os.Open(filepath.Join(targetDir, ".git", "config"))
if err != nil {
return err
}
defer gitConfigReader.Close()
gitConfig, err := config.ReadConfig(gitConfigReader)
if err != nil {
return err
}
gitConfig.Core.IsBare = false
b, err := gitConfig.Marshal()
if err != nil {
return err
}
err = os.WriteFile(filepath.Join(targetDir, ".git", "config"), b, 0o600)
if err != nil {
return err
}
r, err := git.PlainOpen(targetDir)
if err != nil {
return err
}
wt, err := r.Worktree()
if err != nil {
return err
}
err = wt.Checkout(coOptions)
if err != nil {
return err
}
return nil
}