mugit/internal/git/repo.go (view raw)
| 1 | package git |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "fmt" |
| 7 | "path/filepath" |
| 8 | "strings" |
| 9 | "time" |
| 10 | |
| 11 | "github.com/go-git/go-git/v5" |
| 12 | "github.com/go-git/go-git/v5/plumbing" |
| 13 | "github.com/go-git/go-git/v5/plumbing/object" |
| 14 | "github.com/go-git/go-git/v5/plumbing/transport" |
| 15 | "github.com/go-git/go-git/v5/plumbing/transport/http" |
| 16 | ) |
| 17 | |
| 18 | // Thanks https://git.icyphox.sh/legit/blob/master/git/git.go |
| 19 | |
| 20 | var ( |
| 21 | ErrEmptyRepo = errors.New("repository has no commits") |
| 22 | ErrFileNotFound = errors.New("file not found") |
| 23 | ErrPrivate = errors.New("repository is private") |
| 24 | ) |
| 25 | |
| 26 | type Repo struct { |
| 27 | path string |
| 28 | r *git.Repository |
| 29 | h plumbing.Hash |
| 30 | } |
| 31 | |
| 32 | // Open opens a git repository at path. If ref is empty, HEAD is used. |
| 33 | func Open(path, ref string) (*Repo, error) { |
| 34 | var err error |
| 35 | g := Repo{} |
| 36 | g.path = path |
| 37 | g.r, err = git.PlainOpen(path) |
| 38 | if err != nil { |
| 39 | return nil, fmt.Errorf("opening %s: %w", path, err) |
| 40 | } |
| 41 | |
| 42 | if ref == "" { |
| 43 | head, err := g.r.Head() |
| 44 | if err != nil { |
| 45 | if errors.Is(err, plumbing.ErrReferenceNotFound) { |
| 46 | return &g, nil |
| 47 | } |
| 48 | return nil, fmt.Errorf("getting head of %s: %w", path, err) |
| 49 | } |
| 50 | g.h = head.Hash() |
| 51 | } else { |
| 52 | hash, err := g.r.ResolveRevision(plumbing.Revision(ref)) |
| 53 | if err != nil { |
| 54 | return nil, fmt.Errorf("resolving rev %s for %s: %w", ref, path, err) |
| 55 | } |
| 56 | g.h = *hash |
| 57 | } |
| 58 | return &g, nil |
| 59 | } |
| 60 | |
| 61 | // OpenPublic opens a repository, returns [ErrPrivate] if it's private. |
| 62 | func OpenPublic(path, ref string) (*Repo, error) { |
| 63 | r, err := Open(path, ref) |
| 64 | if err != nil { |
| 65 | return nil, err |
| 66 | } |
| 67 | |
| 68 | isPrivate, err := r.IsPrivate() |
| 69 | if err != nil { |
| 70 | return nil, err |
| 71 | } |
| 72 | |
| 73 | if isPrivate { |
| 74 | return nil, ErrPrivate |
| 75 | } |
| 76 | |
| 77 | return r, nil |
| 78 | } |
| 79 | |
| 80 | func (g *Repo) IsEmpty() bool { |
| 81 | return g.h == plumbing.ZeroHash |
| 82 | } |
| 83 | |
| 84 | // Init initializes a bare repo in path. |
| 85 | func Init(path string) error { |
| 86 | if _, err := git.PlainInit(path, true); err != nil { |
| 87 | return fmt.Errorf("failed to initialize repo: %w", err) |
| 88 | } |
| 89 | return nil |
| 90 | } |
| 91 | |
| 92 | func (g *Repo) Name() string { |
| 93 | name := filepath.Base(g.path) |
| 94 | return strings.TrimSuffix(name, ".git") |
| 95 | } |
| 96 | |
| 97 | type Commit struct { |
| 98 | Message string |
| 99 | AuthorEmail string |
| 100 | AuthorName string |
| 101 | ChangeID string |
| 102 | Committed time.Time |
| 103 | Hash string |
| 104 | HashShort string |
| 105 | } |
| 106 | |
| 107 | func newShortHash(h plumbing.Hash) string { return h.String()[:7] } |
| 108 | func newCommit(c *object.Commit) *Commit { |
| 109 | var changeID string |
| 110 | for _, header := range c.ExtraHeaders { |
| 111 | if header.Key == "change-id" { |
| 112 | changeID = header.Value |
| 113 | break |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | return &Commit{ |
| 118 | Message: c.Message, |
| 119 | AuthorEmail: c.Author.Email, |
| 120 | AuthorName: c.Author.Name, |
| 121 | ChangeID: changeID, |
| 122 | Committed: c.Committer.When, |
| 123 | Hash: c.Hash.String(), |
| 124 | HashShort: newShortHash(c.Hash), |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | func (g *Repo) Commits() ([]*Commit, error) { |
| 129 | if g.IsEmpty() { |
| 130 | return []*Commit{}, nil |
| 131 | } |
| 132 | |
| 133 | ci, err := g.r.Log(&git.LogOptions{ |
| 134 | From: g.h, |
| 135 | Order: git.LogOrderCommitterTime, |
| 136 | }) |
| 137 | if err != nil { |
| 138 | return nil, fmt.Errorf("commits from ref: %w", err) |
| 139 | } |
| 140 | |
| 141 | var commits []*Commit |
| 142 | ci.ForEach(func(c *object.Commit) error { |
| 143 | commits = append(commits, newCommit(c)) |
| 144 | return nil |
| 145 | }) |
| 146 | |
| 147 | return commits, nil |
| 148 | } |
| 149 | |
| 150 | func (g *Repo) LastCommit() (*Commit, error) { |
| 151 | if g.IsEmpty() { |
| 152 | return &Commit{}, nil |
| 153 | } |
| 154 | |
| 155 | c, err := g.r.CommitObject(g.h) |
| 156 | if err != nil { |
| 157 | return nil, fmt.Errorf("last commit: %w", err) |
| 158 | } |
| 159 | |
| 160 | return newCommit(c), nil |
| 161 | } |
| 162 | |
| 163 | type Branch struct { |
| 164 | Name string |
| 165 | LastUpdate time.Time |
| 166 | } |
| 167 | |
| 168 | func (g *Repo) Branches() ([]*Branch, error) { |
| 169 | bi, err := g.r.Branches() |
| 170 | if err != nil { |
| 171 | return nil, fmt.Errorf("branch: %w", err) |
| 172 | } |
| 173 | |
| 174 | var branches []*Branch |
| 175 | err = bi.ForEach(func(r *plumbing.Reference) error { |
| 176 | cmt, cerr := g.r.CommitObject(r.Hash()) |
| 177 | if cerr != nil { |
| 178 | return cerr |
| 179 | } |
| 180 | |
| 181 | branches = append(branches, &Branch{ |
| 182 | Name: r.Name().Short(), |
| 183 | LastUpdate: cmt.Committer.When, |
| 184 | }) |
| 185 | return nil |
| 186 | }) |
| 187 | return branches, err |
| 188 | } |
| 189 | |
| 190 | func (g *Repo) IsGoMod() bool { |
| 191 | _, err := g.FileContent("go.mod") |
| 192 | return err == nil |
| 193 | } |
| 194 | |
| 195 | func (g *Repo) FindMasterBranch(masters []string) (string, error) { |
| 196 | if g.IsEmpty() { |
| 197 | return "", ErrEmptyRepo |
| 198 | } |
| 199 | |
| 200 | for _, b := range masters { |
| 201 | if _, err := g.r.ResolveRevision(plumbing.Revision(b)); err == nil { |
| 202 | return b, nil |
| 203 | } |
| 204 | } |
| 205 | return "", fmt.Errorf("unable to find master branch") |
| 206 | } |
| 207 | |
| 208 | func (g *Repo) Fetch(ctx context.Context) error { |
| 209 | return g.fetch(ctx, nil) |
| 210 | } |
| 211 | |
| 212 | func (g *Repo) FetchFromGithubWithToken(ctx context.Context, token string) error { |
| 213 | return g.fetch(ctx, &http.BasicAuth{ |
| 214 | Username: "x-access-token", // this can be anything but empty |
| 215 | Password: token, |
| 216 | }) |
| 217 | } |
| 218 | |
| 219 | func (g *Repo) fetch(ctx context.Context, auth transport.AuthMethod) error { |
| 220 | rmt, err := g.r.Remote(originRemote) |
| 221 | if err != nil { |
| 222 | return fmt.Errorf("failed to get remote: %w", err) |
| 223 | } |
| 224 | |
| 225 | if err = rmt.FetchContext(ctx, &git.FetchOptions{ |
| 226 | Auth: auth, |
| 227 | Tags: git.AllTags, |
| 228 | Prune: true, |
| 229 | Force: true, |
| 230 | }); err != nil && !errors.Is(err, git.NoErrAlreadyUpToDate) { |
| 231 | return fmt.Errorf("failed to fetch: %w", err) |
| 232 | } |
| 233 | |
| 234 | // for some reason fetch doesn't change head for empty repos |
| 235 | if !g.IsEmpty() { |
| 236 | return nil |
| 237 | } |
| 238 | |
| 239 | refs, err := rmt.List(&git.ListOptions{Auth: auth}) |
| 240 | if err != nil { |
| 241 | return fmt.Errorf("failed to list references: %w", err) |
| 242 | } |
| 243 | |
| 244 | for _, ref := range refs { |
| 245 | if ref.Name() == plumbing.HEAD { |
| 246 | if err := g.r.Storer.SetReference( |
| 247 | plumbing.NewSymbolicReference(plumbing.HEAD, ref.Target()), |
| 248 | ); err != nil { |
| 249 | return fmt.Errorf("failed to set HEAD: %w", err) |
| 250 | } |
| 251 | break |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | return nil |
| 256 | } |