zccache 1.12.9

Local-first compiler cache for C/C++/Rust/Emscripten
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

use std::fs;
use std::thread;
use std::time::Duration;

fn libclang_available() -> bool {
    zccache::compiler::arduino::can_load_libclang()
}

#[test]
fn cached_ino_conversion_skips_rewriting_unchanged_output() {
    if !libclang_available() {
        return;
    }

    let dir = tempfile::tempdir().unwrap();
    let ino = dir.path().join("CacheMe.ino");
    let out = dir.path().join("CacheMe.ino.cpp");
    fs::write(
        &ino,
        r#"
void setup() {}
void loop() {}

int helper(int value) {
    return value + 1;
}
"#,
    )
    .unwrap();

    let first = zccache::cli::run_ino_convert_cached(
        &ino,
        &out,
        &zccache::cli::InoConvertOptions::default(),
    )
    .unwrap();
    assert!(out.exists());
    assert!(
        !first.cache_hit,
        "first conversion should populate the cache"
    );

    let first_mtime = fs::metadata(&out).unwrap().modified().unwrap();
    thread::sleep(Duration::from_millis(1100));

    let second = zccache::cli::run_ino_convert_cached(
        &ino,
        &out,
        &zccache::cli::InoConvertOptions::default(),
    )
    .unwrap();
    let second_mtime = fs::metadata(&out).unwrap().modified().unwrap();

    assert!(second.cache_hit, "second conversion should come from cache");
    assert!(
        second.skipped_write,
        "second conversion should preserve the existing output file when unchanged"
    );
    assert_eq!(
        first_mtime, second_mtime,
        "unchanged cached output should not be rewritten"
    );
}