1 /*
2 * libgit2 "blame" example - shows how to use the blame API
3 *
4 * Written by the libgit2 contributors
5 *
6 * To the extent possible under law, the author(s) have dedicated all copyright
7 * and related and neighboring rights to this software to the public domain
8 * worldwide. This software is distributed without any warranty.
9 *
10 * You should have received a copy of the CC0 Public Domain Dedication along
11 * with this software. If not, see
12 * <http://creativecommons.org/publicdomain/zero/1.0/>.
13 */
14
15 #![deny(warnings)]
16
17 use git2::{BlameOptions, Repository};
18 use std::io::{BufRead, BufReader};
19 use std::path::Path;
20 use structopt::StructOpt;
21
22 #[derive(StructOpt)]
23 #[allow(non_snake_case)]
24 struct Args {
25 #[structopt(name = "path")]
26 arg_path: String,
27 #[structopt(name = "spec")]
28 arg_spec: Option<String>,
29 #[structopt(short = "M")]
30 /// find line moves within and across files
31 flag_M: bool,
32 #[structopt(short = "C")]
33 /// find line copies within and across files
34 flag_C: bool,
35 #[structopt(short = "F")]
36 /// follow only the first parent commits
37 flag_F: bool,
38 }
39
run(args: &Args) -> Result<(), git2::Error>40 fn run(args: &Args) -> Result<(), git2::Error> {
41 let repo = Repository::open(".")?;
42 let path = Path::new(&args.arg_path[..]);
43
44 // Prepare our blame options
45 let mut opts = BlameOptions::new();
46 opts.track_copies_same_commit_moves(args.flag_M)
47 .track_copies_same_commit_copies(args.flag_C)
48 .first_parent(args.flag_F);
49
50 let mut commit_id = "HEAD".to_string();
51
52 // Parse spec
53 if let Some(spec) = args.arg_spec.as_ref() {
54 let revspec = repo.revparse(spec)?;
55
56 let (oldest, newest) = if revspec.mode().contains(git2::RevparseMode::SINGLE) {
57 (None, revspec.from())
58 } else if revspec.mode().contains(git2::RevparseMode::RANGE) {
59 (revspec.from(), revspec.to())
60 } else {
61 (None, None)
62 };
63
64 if let Some(commit) = oldest {
65 opts.oldest_commit(commit.id());
66 }
67
68 if let Some(commit) = newest {
69 opts.newest_commit(commit.id());
70 if !commit.id().is_zero() {
71 commit_id = format!("{}", commit.id())
72 }
73 }
74 }
75
76 let spec = format!("{}:{}", commit_id, path.display());
77 let blame = repo.blame_file(path, Some(&mut opts))?;
78 let object = repo.revparse_single(&spec[..])?;
79 let blob = repo.find_blob(object.id())?;
80 let reader = BufReader::new(blob.content());
81
82 for (i, line) in reader.lines().enumerate() {
83 if let (Ok(line), Some(hunk)) = (line, blame.get_line(i + 1)) {
84 let sig = hunk.final_signature();
85 println!(
86 "{} {} <{}> {}",
87 hunk.final_commit_id(),
88 String::from_utf8_lossy(sig.name_bytes()),
89 String::from_utf8_lossy(sig.email_bytes()),
90 line
91 );
92 }
93 }
94
95 Ok(())
96 }
97
main()98 fn main() {
99 let args = Args::from_args();
100 match run(&args) {
101 Ok(()) => {}
102 Err(e) => println!("error: {}", e),
103 }
104 }
105