1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
package main
import (
"bufio"
"fmt"
"log"
"os"
"os/exec"
"regexp"
"strings"
)
var preferredRemotes = []string{"origin", "github", "work"}
type GitRepository struct {
WorkingDirectory string
RemoteName string
RemoteURL string
PrimaryBranch string
}
func NewGitRepository(workingDir string) (*GitRepository, error) {
repo := &GitRepository{
WorkingDirectory: workingDir,
}
if err := repo.isGitRepository(); err != nil {
return nil, err
}
if err := repo.workdirIsClean(); err != nil {
return nil, err
}
if err := repo.guessRemote(); err != nil {
return nil, err
}
if err := repo.guessPrimaryBranch(); err != nil {
return nil, err
}
return repo, nil
}
func (r *GitRepository) runGitCommand(args ...string) ([]byte, error) {
cmd := exec.Command("git", append([]string{"-C", r.WorkingDirectory}, args...)...)
return cmd.Output()
}
func (r *GitRepository) guessPrimaryBranch() error {
output, err := r.runGitCommand("ls-remote", "--symref", r.RemoteName, "HEAD")
if err != nil {
return fmt.Errorf("failed to run git ls-remote: %w", err)
}
re := regexp.MustCompile(`ref: refs/heads/(\S+)\s+HEAD`)
matches := re.FindStringSubmatch(string(output))
if len(matches) < 2 {
return fmt.Errorf("could not determine primary branch")
}
r.PrimaryBranch = matches[1]
return nil
}
func (r *GitRepository) guessRemote() error {
output, err := r.runGitCommand("config", "--get-regexp", `remote\.[a-z0-9]+\.url`)
if err != nil {
return fmt.Errorf("failed to run git config: %w", err)
}
remotes := make(map[string]string)
scanner := bufio.NewScanner(strings.NewReader(string(output)))
for scanner.Scan() {
line := scanner.Text()
parts := strings.Fields(line)
if len(parts) < 2 {
continue
}
configParts := strings.Split(parts[0], ".")
if len(configParts) < 2 {
continue
}
remoteName := configParts[1]
remoteURL := parts[1]
remotes[remoteName] = remoteURL
}
for _, preferred := range preferredRemotes {
if url, exists := remotes[preferred]; exists {
r.RemoteName = preferred
r.RemoteURL = url
return nil
}
}
return fmt.Errorf("no preferred remote configured")
}
func (r *GitRepository) isGitRepository() error {
_, err := r.runGitCommand("rev-parse", "--show-toplevel")
if err != nil {
return fmt.Errorf("%s is not a git repository", r.WorkingDirectory)
}
return nil
}
func (r *GitRepository) workdirIsClean() error {
_, err := r.runGitCommand("diff", "--quiet", "--exit-code")
if err != nil {
return fmt.Errorf("%s has unstaged changes, commit or stash them first", r.WorkingDirectory)
}
return nil
}
// getMergedBranches returns a list of local branches that have been merged into the primary branch
func (r *GitRepository) getMergedBranches() ([]string, error) {
output, err := r.runGitCommand("branch", "--merged", r.PrimaryBranch)
if err != nil {
return nil, fmt.Errorf("failed to get merged branches: %w", err)
}
var branches []string
scanner := bufio.NewScanner(strings.NewReader(string(output)))
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
// Skip current branch indicator and the primary branch itself
if strings.HasPrefix(line, "*") {
line = strings.TrimSpace(line[1:])
}
// Don't delete the primary branch
if line != r.PrimaryBranch && line != "" {
branches = append(branches, line)
}
}
return branches, scanner.Err()
}
// deleteBranch deletes a local branch
func (r *GitRepository) deleteBranch(branch string) error {
_, err := r.runGitCommand("branch", "-d", branch)
if err != nil {
// Try force delete if normal delete fails
_, forceErr := r.runGitCommand("branch", "-D", branch)
if forceErr != nil {
return fmt.Errorf("failed to delete branch %s: %w", branch, err)
}
log.Printf("Force deleted branch: %s", branch)
return nil
}
log.Printf("Deleted branch: %s", branch)
return nil
}
// cleanupMergedBranches deletes all local branches that have been merged into the primary branch
func (r *GitRepository) cleanupMergedBranches(dryRun bool) error {
mergedBranches, err := r.getMergedBranches()
if err != nil {
return err
}
if len(mergedBranches) == 0 {
log.Println("No merged branches to clean up")
return nil
}
log.Printf("Found %d merged branches:", len(mergedBranches))
for _, branch := range mergedBranches {
if dryRun {
log.Printf("Would delete: %s", branch)
} else {
if err := r.deleteBranch(branch); err != nil {
log.Printf("Error deleting branch %s: %v", branch, err)
}
}
}
return nil
}
func main() {
wd, err := os.Getwd()
if err != nil {
log.Fatalf("Failed to get working directory: %v", err)
}
repo, err := NewGitRepository(wd)
if err != nil {
log.Fatalf("Error: %v", err)
}
log.Printf("Working in: %s", repo.WorkingDirectory)
log.Printf("Main branch is: %s", repo.PrimaryBranch)
log.Printf("Remote is named %s and is at %s", repo.RemoteName, repo.RemoteURL)
dryRun := len(os.Args) > 1 && os.Args[1] == "--dry-run"
if dryRun {
log.Println("Running in dry-run mode")
}
if err := repo.cleanupMergedBranches(dryRun); err != nil {
log.Fatalf("Failed to cleanup merged branches: %v", err)
}
}
|
