feat: add stash command

- Add stash push
- List
- Show

repo_stash.go

@@ -0,0 +1,130 @@
+package git
+
+import (
+	"bytes"
+	"io"
+	stdlog "log"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+// Stash represents a stash in the repository.
+type Stash struct {
+	// Index is the index of the stash.
+	Index int
+
+	// Message is the message of the stash.
+	Message string
+
+	// Files is the list of files in the stash.
+	Files []string
+}
+
+// StashListOptions describes the options for the StashList function.
+type StashListOptions struct {
+	// CommandOptions describes the options for the command.
+	CommandOptions
+}
+
+var stashLineRegexp = regexp.MustCompile(`^stash@\{(\d+)\}: (.*)$`)
+
+// StashList returns a list of stashes in the repository.
+// This must be run in a work tree.
+func (r *Repository) StashList(opts ...StashListOptions) ([]*Stash, error) {
+	var opt StashListOptions
+	if len(opts) > 0 {
+		opt = opts[0]
+	}
+
+	stash := make([]*Stash, 0)
+	cmd := NewCommand("stash", "list", "--name-only").AddOptions(opt.CommandOptions)
+	stdout, stderr := new(bytes.Buffer), new(bytes.Buffer)
+	if err := cmd.RunInDirPipeline(stdout, stderr, r.path); err != nil {
+		return nil, concatenateError(err, stderr.String())
+	}
+
+	var entry *Stash
+	lines := strings.Split(stdout.String(), "\n")
+	for i := 0; i < len(lines); i++ {
+		// Init entry
+		if match := stashLineRegexp.FindStringSubmatch(lines[i]); len(match) == 3 {
+			stdlog.Printf("match: %v", match)
+			if entry != nil {
+				stdlog.Printf("stash: %v", entry)
+				stash = append(stash, entry)
+			}
+
+			idx, err := strconv.Atoi(match[1])
+			if err != nil {
+				idx = -1
+			}
+			entry = &Stash{
+				Index:   idx,
+				Message: match[2],
+				Files:   make([]string, 0),
+			}
+		} else if entry != nil && lines[i] != "" {
+			stdlog.Printf("file: %s", lines[i])
+			entry.Files = append(entry.Files, lines[i])
+		} else {
+			stdlog.Printf("skip: %s", lines[i])
+			continue
+		}
+	}
+
+	if entry != nil {
+		stdlog.Printf("stash: %v", entry)
+		stash = append(stash, entry)
+	}
+
+	return stash, nil
+}
+
+// StashDiff returns a parsed diff object for the given stash index.
+// This must be run in a work tree.
+func (r *Repository) StashDiff(index int, maxFiles, maxFileLines, maxLineChars int, opts ...DiffOptions) (*Diff, error) {
+	var opt DiffOptions
+	if len(opts) > 0 {
+		opt = opts[0]
+	}
+
+	cmd := NewCommand("stash", "show", "-p", "--full-index", "-M", strconv.Itoa(index)).AddOptions(opt.CommandOptions)
+	stdout, w := io.Pipe()
+	done := make(chan SteamParseDiffResult)
+	go StreamParseDiff(stdout, done, maxFiles, maxFileLines, maxLineChars)
+
+	stderr := new(bytes.Buffer)
+	err := cmd.RunInDirPipelineWithTimeout(opt.Timeout, w, stderr, r.path)
+	_ = w.Close() // Close writer to exit parsing goroutine
+	if err != nil {
+		return nil, concatenateError(err, stderr.String())
+	}
+
+	result := <-done
+	return result.Diff, result.Err
+}
+
+// StashPushOptions describes the options for the StashPush function.
+type StashPushOptions struct {
+	// CommandOptions describes the options for the command.
+	CommandOptions
+}
+
+// StashPush pushes the current worktree to the stash.
+// This must be run in a work tree.
+func (r *Repository) StashPush(msg string, opts ...StashPushOptions) error {
+	var opt StashPushOptions
+	if len(opts) > 0 {
+		opt = opts[0]
+	}
+
+	cmd := NewCommand("stash", "push")
+	if msg != "" {
+		cmd.AddArgs("-m", msg)
+	}
+	cmd.AddOptions(opt.CommandOptions)
+
+	_, err := cmd.RunInDir(r.path)
+	return err
+}

repo_stash_test.go

@@ -0,0 +1,201 @@
+package git
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestStashWorktreeError(t *testing.T) {
+	_, err := testrepo.StashList()
+	if err == nil {
+		t.Errorf("StashList() error = %v, wantErr %v", err, true)
+		return
+	}
+}
+
+func TestStash(t *testing.T) {
+	tmp := t.TempDir()
+	path, err := filepath.Abs(repoPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if err := Clone("file://"+path, tmp); err != nil {
+		t.Fatal(err)
+	}
+
+	repo, err := Open(tmp)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if err := os.WriteFile(tmp+"/resources/newfile", []byte("hello, world!"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	f, err := os.OpenFile(tmp+"/README.txt", os.O_APPEND|os.O_WRONLY, 0o644)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := f.WriteString("\n\ngit-module"); err != nil {
+		t.Fatal(err)
+	}
+
+	f.Close()
+	if err := repo.Add(AddOptions{
+		All: true,
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := repo.StashPush(""); err != nil {
+		t.Fatal(err)
+	}
+
+	f, err = os.OpenFile(tmp+"/README.txt", os.O_APPEND|os.O_WRONLY, 0o644)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := f.WriteString("\n\nstash 1"); err != nil {
+		t.Fatal(err)
+	}
+
+	f.Close()
+	if err := repo.Add(AddOptions{
+		All: true,
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := repo.StashPush("custom message"); err != nil {
+		t.Fatal(err)
+	}
+
+	want := []*Stash{
+		{
+			Index:   0,
+			Message: "On master: custom message",
+			Files:   []string{"README.txt"},
+		},
+		{
+			Index:   1,
+			Message: "WIP on master: cfc3b29 Add files with same SHA",
+			Files:   []string{"README.txt", "resources/newfile"},
+		},
+	}
+
+	stash, err := repo.StashList()
+	require.NoError(t, err)
+	require.Equalf(t, want, stash, "StashList() got = %v, want %v", stash, want)
+
+	wantDiff := &Diff{
+		totalAdditions: 4,
+		totalDeletions: 0,
+		isIncomplete:   false,
+		Files: []*DiffFile{
+			{
+				Name:     "README.txt",
+				Type:     DiffFileChange,
+				Index:    "72e29aca01368bc0aca5d599c31fa8705b11787d",
+				OldIndex: "adfd6da3c0a3fb038393144becbf37f14f780087",
+				Sections: []*DiffSection{
+					{
+						Lines: []*DiffLine{
+							{
+								Type:    DiffLineSection,
+								Content: `@@ -13,3 +13,6 @@ As a quick reminder, this came from one of three locations in either SSH, Git, o`,
+							},
+							{
+								Type:      DiffLinePlain,
+								Content:   " We can, as an example effort, even modify this README and change it as if it were source code for the purposes of the class.",
+								LeftLine:  13,
+								RightLine: 13,
+							},
+							{
+								Type:      DiffLinePlain,
+								Content:   " ",
+								LeftLine:  14,
+								RightLine: 14,
+							},
+							{
+								Type:      DiffLinePlain,
+								Content:   " This demo also includes an image with changes on a branch for examination of image diff on GitHub.",
+								LeftLine:  15,
+								RightLine: 15,
+							},
+							{
+								Type:      DiffLineAdd,
+								Content:   "+",
+								LeftLine:  0,
+								RightLine: 16,
+							},
+							{
+								Type:      DiffLineAdd,
+								Content:   "+",
+								LeftLine:  0,
+								RightLine: 17,
+							},
+							{
+								Type:      DiffLineAdd,
+								Content:   "+git-module",
+								LeftLine:  0,
+								RightLine: 18,
+							},
+						},
+						numAdditions: 3,
+						numDeletions: 0,
+					},
+				},
+				numAdditions: 3,
+				numDeletions: 0,
+				oldName:      "README.txt",
+				mode:         0o100644,
+				oldMode:      0o100644,
+				isBinary:     false,
+				isSubmodule:  false,
+				isIncomplete: false,
+			},
+			{
+				Name:     "resources/newfile",
+				Type:     DiffFileAdd,
+				Index:    "30f51a3fba5274d53522d0f19748456974647b4f",
+				OldIndex: "0000000000000000000000000000000000000000",
+				Sections: []*DiffSection{
+					{
+						Lines: []*DiffLine{
+							{
+								Type:    DiffLineSection,
+								Content: "@@ -0,0 +1 @@",
+							},
+							{
+								Type:      DiffLineAdd,
+								Content:   "+hello, world!",
+								LeftLine:  0,
+								RightLine: 1,
+							},
+						},
+						numAdditions: 1,
+						numDeletions: 0,
+					},
+				},
+				numAdditions: 1,
+				numDeletions: 0,
+				oldName:      "resources/newfile",
+				mode:         0o100644,
+				oldMode:      0o100644,
+				isBinary:     false,
+				isSubmodule:  false,
+				isIncomplete: false,
+			},
+		},
+	}
+
+	diff, err := repo.StashDiff(want[1].Index, 0, 0, 0)
+	require.NoError(t, err)
+	require.Equalf(t, wantDiff, diff, "StashDiff() got = %v, want %v", diff, wantDiff)
+}