mugit/internal/git/pack.go (view raw)
Oleksandr Smirnov
Oleksandr Smirnov
olexsmir@gmail.com git: improve ergonomics of method that is only used 4 times, 2 months ago
olexsmir@gmail.com git: improve ergonomics of method that is only used 4 times, 2 months ago
| 1 | package git |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "io" |
| 7 | "strings" |
| 8 | ) |
| 9 | |
| 10 | // InfoRefs executes git-upload-pack --advertise-refs for smart-HTTP discovery. |
| 11 | func (g *Repo) InfoRefs(ctx context.Context, protocol string, out io.Writer) error { |
| 12 | if !strings.Contains(protocol, "version=2") { |
| 13 | if err := PackLine(out, "# service=git-upload-pack\n"); err != nil { |
| 14 | return fmt.Errorf("write pack line: %w", err) |
| 15 | } |
| 16 | if err := PackFlush(out); err != nil { |
| 17 | return fmt.Errorf("flush pack: %w", err) |
| 18 | } |
| 19 | } |
| 20 | |
| 21 | if err := g.gitCmd(ctx, cmdOpts{ |
| 22 | GitProtocol: protocol, |
| 23 | Cmd: []string{ |
| 24 | "-c", "uploadpack.allowFilter=true", |
| 25 | "upload-pack", "--stateless-rpc", "--advertise-refs", |
| 26 | }, |
| 27 | Stdout: out, |
| 28 | Stderr: out, // TODO: Check if this is correct. |
| 29 | }); err != nil { |
| 30 | return fmt.Errorf("git-upload-pack: %w", err) |
| 31 | } |
| 32 | return nil |
| 33 | } |
| 34 | |
| 35 | // UploadPack executes git-upload-pack for smart-HTTP git fetch/clone. |
| 36 | // StatelessRPC should be true in case it's used over http, and false for ssh. |
| 37 | func (g *Repo) UploadPack(ctx context.Context, statelessRPC bool, protocol string, in io.Reader, out io.Writer) error { |
| 38 | cmd := []string{"-c", "uploadpack.allowFilter=true", "upload-pack"} |
| 39 | if statelessRPC { |
| 40 | cmd = append(cmd, "--stateless-rpc") |
| 41 | } |
| 42 | |
| 43 | if err := g.gitCmd(ctx, cmdOpts{ |
| 44 | Cmd: cmd, |
| 45 | GitProtocol: protocol, |
| 46 | Stdin: in, |
| 47 | Stdout: out, |
| 48 | Stderr: out, // TODO: Check if this is correct. |
| 49 | }); err != nil { |
| 50 | return fmt.Errorf("git-upload-pack: %w", err) |
| 51 | } |
| 52 | return nil |
| 53 | } |
| 54 | |
| 55 | // ReceivePack executes git-receive-pack for git push. |
| 56 | func (g *Repo) ReceivePack(ctx context.Context, in io.Reader, out, errout io.Writer) error { |
| 57 | if err := g.gitCmd(ctx, cmdOpts{ |
| 58 | Cmd: []string{"receive-pack"}, |
| 59 | Stdin: in, |
| 60 | Stdout: out, |
| 61 | Stderr: errout, |
| 62 | }); err != nil { |
| 63 | return fmt.Errorf("git-receive-pack: %w", err) |
| 64 | } |
| 65 | return nil |
| 66 | } |
| 67 | |
| 68 | // PackLine writes a pkt-line formatted string. |
| 69 | func PackLine(w io.Writer, s string) error { |
| 70 | _, err := fmt.Fprintf(w, "%04x%s", len(s)+4, s) |
| 71 | return err |
| 72 | } |
| 73 | |
| 74 | // PackFlush writes a flush packet. |
| 75 | func PackFlush(w io.Writer) error { |
| 76 | _, err := fmt.Fprint(w, "0000") |
| 77 | return err |
| 78 | } |
| 79 | |
| 80 | // PackError writes an ERR packet for protocol-level errors. |
| 81 | // Git displays this as: fatal: remote error: <msg> |
| 82 | func PackError(w io.Writer, msg string) error { |
| 83 | return PackLine(w, "ERR "+msg) |
| 84 | } |