girt 0.17.0

An incremental, idiomatic Rust implementation of Git
Documentation 
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

use std::ops::ControlFlow;
use std::process::Command;
use std::sync::atomic::AtomicBool;
use std::time::{Duration, Instant};

use rstest::rstest;

use super::receive_server;
use crate::fetch::{FetchError, FetchLimits};
use crate::transport::TransportControl;

#[rstest]
#[case::advertisement("sleep 3")]
#[case::after_advertisement("printf 0000; read request; sleep 3")]
#[case::exit_wait("printf 0000; dd bs=1 count=4 of=/dev/null 2>/dev/null; exec 1>&-; sleep 3")]
fn deadline_interrupts_fetch_phases(#[case] script: &str) {
    let mut command = Command::new("/bin/sh");
    command.arg("-c").arg(format!(
        "(sleep 8; kill -KILL -$$) </dev/null >/dev/null 2>&1 &\n{script}"
    ));
    let cancel = AtomicBool::new(false);
    let result = receive_server(
        &mut command,
        |_| vec![],
        FetchLimits::default(),
        TransportControl {
            cancel: &cancel,
            deadline: Some(Instant::now() + Duration::from_millis(500)),
        },
        |_| ControlFlow::Continue(()),
    );
    assert!(matches!(result, Err(FetchError::Deadline)));
}

#[rstest]
#[case::sha1("sha1")]
#[case::sha256("sha256")]
fn native_wants_match_git_upload_pack_in_selection_order(#[case] format: &str) {
    let root = tempfile::tempdir().unwrap();
    let git = |args: &[&str]| {
        let output = Command::new("git")
            .current_dir(root.path())
            .env("GIT_CONFIG_NOSYSTEM", "1")
            .env("GIT_CONFIG_GLOBAL", root.path().join("absent-config"))
            .args(args)
            .output()
            .unwrap();
        assert!(output.status.success(), "{output:?}");
        output.stdout
    };
    git(&[
        "init",
        "--bare",
        "--template=",
        "--initial-branch=main",
        &format!("--object-format={format}"),
        ".",
    ]);
    let parse = |bytes: Vec<u8>| -> crate::ObjectId {
        std::str::from_utf8(&bytes).unwrap().trim().parse().unwrap()
    };
    let tree = git(&["mktree"]);
    let tree = std::str::from_utf8(&tree).unwrap().trim();
    let one = parse(git(&[
        "-c",
        "user.name=Fetch Test",
        "-c",
        "user.email=fetch@example.invalid",
        "commit-tree",
        tree,
        "-m",
        "one",
    ]));
    let two = parse(git(&[
        "-c",
        "user.name=Fetch Test",
        "-c",
        "user.email=fetch@example.invalid",
        "commit-tree",
        tree,
        "-m",
        "two",
    ]));
    git(&["update-ref", "refs/heads/main", &one.to_string()]);
    git(&["update-ref", "refs/heads/two", &two.to_string()]);
    let cancel = AtomicBool::new(false);
    for (selection, expected) in [
        (vec![one, one], vec![one]),
        (vec![two, one, two, one], vec![two, one]),
    ] {
        for max_wants in [selection.len(), selection.len() - 1] {
            let limits = FetchLimits::default().with_max_wants(max_wants);
            let native = crate::fetch::receive_local(
                root.path(),
                |_| selection.clone(),
                crate::fetch::LocalFetchRequest::new(limits),
                TransportControl::new(&cancel),
                crate::fetch::LocalFetchObserver::default(),
            );
            let mut command = Command::new("git");
            command.arg("upload-pack").arg(root.path());
            let wire = receive_server(
                &mut command,
                |_| selection.clone(),
                limits,
                TransportControl::new(&cancel),
                |_| ControlFlow::Continue(()),
            );
            if max_wants < selection.len() {
                assert!(matches!(native, Err(FetchError::Limit("wants"))));
                assert!(matches!(wire, Err(FetchError::Limit("wants"))));
            } else {
                assert_eq!(wire.unwrap().wants(), expected);
                assert_eq!(native.unwrap().wants(), expected);
            }
        }
    }
    let source = crate::Repository::open(root.path()).unwrap();
    for (selection, accepted) in [(vec![one, one], true), (vec![one, two], false)] {
        let result = crate::fetch::local_native::receive_depth(
            &source,
            |_| selection,
            &crate::fetch::KnownHistory::default(),
            std::num::NonZeroU32::new(1),
            FetchLimits::default(),
            TransportControl::new(&cancel),
            |_| ControlFlow::Continue(()),
            |_| {},
        );
        if accepted {
            assert_eq!(result.unwrap().wants(), [one]);
        } else {
            assert!(matches!(
                result,
                Err(FetchError::Unsupported("native local depth selection"))
            ));
        }
    }
}