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/*
* libgit2 "blame" example - shows how to use the blame API
*
* Written by the libgit2 contributors
*
* To the extent possible under law, the author(s) have dedicated all copyright
* and related and neighboring rights to this software to the public domain
* worldwide. This software is distributed without any warranty.
*
* You should have received a copy of the CC0 Public Domain Dedication along
* with this software. If not, see
* <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
#![deny(warnings)]
use git2::{BlameOptions, Repository};
use std::io::{BufRead, BufReader};
use std::path::Path;
use structopt::StructOpt;
#[derive(StructOpt)]
#[allow(non_snake_case)]
struct Args {
#[structopt(name = "path")]
arg_path: String,
#[structopt(name = "spec")]
arg_spec: Option<String>,
#[structopt(short = "M")]
/// find line moves within and across files
flag_M: bool,
#[structopt(short = "C")]
/// find line copies within and across files
flag_C: bool,
#[structopt(short = "F")]
/// follow only the first parent commits
flag_F: bool,
}
fn run(args: &Args) -> Result<(), git2::Error> {
let repo = Repository::open(".")?;
let path = Path::new(&args.arg_path[..]);
// Prepare our blame options
let mut opts = BlameOptions::new();
opts.track_copies_same_commit_moves(args.flag_M)
.track_copies_same_commit_copies(args.flag_C)
.first_parent(args.flag_F);
let mut commit_id = "HEAD".to_string();
// Parse spec
if let Some(spec) = args.arg_spec.as_ref() {
let revspec = repo.revparse(spec)?;
let (oldest, newest) = if revspec.mode().contains(git2::RevparseMode::SINGLE) {
(None, revspec.from())
} else if revspec.mode().contains(git2::RevparseMode::RANGE) {
(revspec.from(), revspec.to())
} else {
(None, None)
};
if let Some(commit) = oldest {
opts.oldest_commit(commit.id());
}
if let Some(commit) = newest {
opts.newest_commit(commit.id());
if !commit.id().is_zero() {
commit_id = format!("{}", commit.id())
}
}
}
let spec = format!("{}:{}", commit_id, path.display());
let blame = repo.blame_file(path, Some(&mut opts))?;
let object = repo.revparse_single(&spec[..])?;
let blob = repo.find_blob(object.id())?;
let reader = BufReader::new(blob.content());
for (i, line) in reader.lines().enumerate() {
if let (Ok(line), Some(hunk)) = (line, blame.get_line(i + 1)) {
let sig = hunk.final_signature();
println!(
"{} {} <{}> {}",
hunk.final_commit_id(),
String::from_utf8_lossy(sig.name_bytes()),
String::from_utf8_lossy(sig.email_bytes()),
line
);
}
}
Ok(())
}
fn main() {
let args = Args::from_args();
match run(&args) {
Ok(()) => {}
Err(e) => println!("error: {}", e),
}
}
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