nova28
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
//go:build linux || darwin
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package gitinit
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import (
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"context"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"golang.org/x/sys/unix"
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)
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const inheritedDirectoryFD = 3
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// init handles the explicitly marked helper subprocess before a test binary or
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// another Kandev entry point can interpret the private helper argument.
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func init() {
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if os.Getenv(helperEnvironmentVariable) != "1" {
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return
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}
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if code, handled := runHelper(os.Args[1:]); handled {
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os.Exit(code)
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}
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}
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// CommandContext creates a Git initialization command bound to targetDirectory.
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func CommandContext(ctx context.Context, _ string, targetDirectory *os.File) (*exec.Cmd, error) {
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gitPath, err := exec.LookPath("git")
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if err != nil {
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return nil, fmt.Errorf("find git: %w", err)
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}
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if !filepath.IsAbs(gitPath) {
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gitPath, err = filepath.Abs(gitPath)
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if err != nil {
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return nil, fmt.Errorf("resolve git executable: %w", err)
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}
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}
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executable, err := os.Executable()
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if err != nil {
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return nil, fmt.Errorf("resolve kandev executable: %w", err)
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}
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command := exec.CommandContext(ctx, executable, helperArgument, gitPath)
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command.ExtraFiles = []*os.File{targetDirectory}
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command.Env = withHelperEnvironment(os.Environ())
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return command, nil
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}
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func runInheritedDirectory(gitPath string) int {
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if err := unix.Fchdir(inheritedDirectoryFD); err != nil {
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fmt.Fprintf(os.Stderr, "git init helper: enter inherited directory: %v\n", err)
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return 1
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}
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if err := unix.Exec(
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gitPath,
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[]string{"git", "init", "--initial-branch=main"},
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withoutHelperEnvironment(os.Environ()),
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); err != nil {
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fmt.Fprintf(os.Stderr, "git init helper: execute git: %v\n", err)
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return 1
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}
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return 0
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}
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