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| 1 | +// Copyright 2020 The Gogs Authors. All rights reserved. |
| 2 | +// Use of this source code is governed by a MIT-style |
| 3 | +// license that can be found in the LICENSE file. |
| 4 | + |
| 5 | +package git |
| 6 | + |
| 7 | +import ( |
| 8 | + "bufio" |
| 9 | + "bytes" |
| 10 | + "strconv" |
| 11 | + "strings" |
| 12 | + "time" |
| 13 | +) |
| 14 | + |
| 15 | +type ( |
| 16 | + Blame struct { |
| 17 | + commits map[int]*Commit |
| 18 | + } |
| 19 | + BlameOptions struct { |
| 20 | + } |
| 21 | +) |
| 22 | + |
| 23 | +// BlameFile returns map of line number and the Commit changed that line. |
| 24 | +func (r *Repository) BlameFile(rev, file string, opts ...BlameOptions) (*Blame, error) { |
| 25 | + cmd := NewCommand("blame", "-p", rev, "--", file) |
| 26 | + stdout, err := cmd.RunInDir(r.path) |
| 27 | + if err != nil { |
| 28 | + return nil, err |
| 29 | + } |
| 30 | + return BlameContent(stdout) |
| 31 | +} |
| 32 | + |
| 33 | +// BlameContent parse content of `git blame` in porcelain format |
| 34 | +func BlameContent(content []byte) (*Blame, error) { |
| 35 | + var commits = make(map[[20]byte]*Commit) |
| 36 | + var commit = &Commit{} |
| 37 | + var details = make(map[string]string) |
| 38 | + var result = createBlame() |
| 39 | + scanner := bufio.NewScanner(bytes.NewReader(content)) |
| 40 | + for scanner.Scan() { |
| 41 | + line := scanner.Text() |
| 42 | + if string(line[0]) != "\t" { |
| 43 | + words := strings.Fields(line) |
| 44 | + sha, err := NewIDFromString(words[0]) |
| 45 | + if err == nil { |
| 46 | + // SHA and rows numbers line |
| 47 | + commit = getCommit(sha, commits) |
| 48 | + commit.fill(details) |
| 49 | + details = make(map[string]string) // empty all details |
| 50 | + i, err := strconv.Atoi(words[2]) |
| 51 | + if err != nil { |
| 52 | + return nil, err |
| 53 | + } |
| 54 | + result.commits[i] = commit |
| 55 | + } else { |
| 56 | + // commit details line |
| 57 | + switch words[0] { |
| 58 | + case "summary": |
| 59 | + commit.Message = line[len(words[0])+1:] |
| 60 | + case "previous": |
| 61 | + commit.parents = []*SHA1{MustIDFromString(words[1])} |
| 62 | + default: |
| 63 | + if len(words) > 1 { |
| 64 | + details[words[0]] = line[len(words[0])+1:] |
| 65 | + } |
| 66 | + } |
| 67 | + } |
| 68 | + } else { |
| 69 | + // needed for last line in blame |
| 70 | + commit.fill(details) |
| 71 | + } |
| 72 | + } |
| 73 | + |
| 74 | + return result, nil |
| 75 | +} |
| 76 | + |
| 77 | +func createBlame() *Blame { |
| 78 | + var blame = Blame{} |
| 79 | + blame.commits = make(map[int]*Commit) |
| 80 | + return &blame |
| 81 | +} |
| 82 | + |
| 83 | +// Return commit from map or creates a new one |
| 84 | +func getCommit(sha *SHA1, commits map[[20]byte]*Commit) *Commit { |
| 85 | + commit, ok := commits[sha.bytes] |
| 86 | + if !ok { |
| 87 | + commit = &Commit{ |
| 88 | + ID: sha, |
| 89 | + } |
| 90 | + commits[sha.bytes] = commit |
| 91 | + } |
| 92 | + |
| 93 | + return commit |
| 94 | +} |
| 95 | + |
| 96 | +func (c *Commit) fill(data map[string]string) { |
| 97 | + author, ok := data["author"] |
| 98 | + if ok && c.Author == nil { |
| 99 | + t, err := parseBlameTime(data, "author") |
| 100 | + if err != nil { |
| 101 | + c.Author = &Signature{ |
| 102 | + Name: author, |
| 103 | + Email: data["author-mail"], |
| 104 | + } |
| 105 | + } else { |
| 106 | + c.Author = &Signature{ |
| 107 | + Name: author, |
| 108 | + Email: data["author-mail"], |
| 109 | + When: t, |
| 110 | + } |
| 111 | + } |
| 112 | + } |
| 113 | + committer, ok := data["committer"] |
| 114 | + if ok && c.Committer == nil { |
| 115 | + t, err := parseBlameTime(data, "committer") |
| 116 | + if err != nil { |
| 117 | + c.Committer = &Signature{ |
| 118 | + Name: committer, |
| 119 | + Email: data["committer-mail"], |
| 120 | + } |
| 121 | + } else { |
| 122 | + c.Committer = &Signature{ |
| 123 | + Name: committer, |
| 124 | + Email: data["committer-mail"], |
| 125 | + When: t, |
| 126 | + } |
| 127 | + } |
| 128 | + } |
| 129 | +} |
| 130 | + |
| 131 | +func parseBlameTime(data map[string]string, prefix string) (time.Time, error) { |
| 132 | + atoi, err := strconv.ParseInt(data[prefix+"-time"], 10, 64) |
| 133 | + if err != nil { |
| 134 | + return time.Time{}, err |
| 135 | + } |
| 136 | + t := time.Unix(atoi, 0) |
| 137 | + |
| 138 | + if len(data["author-tz"]) == 5 { |
| 139 | + hours, ok1 := strconv.ParseInt(data[prefix+"-tz"][:3], 10, 0) |
| 140 | + mins, ok2 := strconv.ParseInt(data[prefix+"-tz"][3:5], 10, 0) |
| 141 | + if ok1 == nil && ok2 == nil { |
| 142 | + t = t.In(time.FixedZone("Fixed", int((hours*60+mins)*60))) |
| 143 | + } |
| 144 | + } |
| 145 | + return t, nil |
| 146 | +} |
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