zccache 1.11.5

Local-first compiler cache for C/C++/Rust/Emscripten
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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165

//! Inline-fixture tests for `cache_ops::warm_target` — focused on the
//! restoration mechanics (file paths, mtime, missing-payload handling,
//! missing-index error). Lockfile-driven filtering is exercised in
//! `warm_lockfile.rs`.

use super::super::cache_ops::warm_target;

#[test]
fn warm_restores_rust_artifacts_to_correct_paths() {
    let dir = tempfile::tempdir().unwrap();
    let cache_dir = dir.path().join("cache");
    let artifact_dir = cache_dir.join("artifacts");
    let index_path = cache_dir.join("index.bin");
    let target_dir = dir.path().join("target");

    std::fs::create_dir_all(&artifact_dir).unwrap();

    // Create a fake artifact store with two Rust crates
    let store = crate::artifact::ArtifactStore::open(&index_path).unwrap();

    // Artifact 1: libserde-abc123.rlib + libserde-abc123.rmeta + serde-abc123.d
    let key1 = "aaaaaaaabbbbbbbb";
    let idx1 = crate::artifact::ArtifactIndex::new(
        vec![
            "libserde-abc123.rlib".to_string(),
            "libserde-abc123.rmeta".to_string(),
            "serde-abc123.d".to_string(),
        ],
        vec![100, 50, 10],
        vec![],
        vec![],
        0,
    );
    store.insert(key1, &idx1);
    // Write payload files on disk
    std::fs::write(artifact_dir.join(format!("{key1}_0")), b"rlib-content").unwrap();
    std::fs::write(artifact_dir.join(format!("{key1}_1")), b"rmeta-content").unwrap();
    std::fs::write(artifact_dir.join(format!("{key1}_2")), b"dep-info").unwrap();

    // Artifact 2: libproc_macro2-def456.rlib
    let key2 = "ccccccccdddddddd";
    let idx2 = crate::artifact::ArtifactIndex::new(
        vec!["libproc_macro2-def456.rlib".to_string()],
        vec![200],
        vec![],
        vec![],
        0,
    );
    store.insert(key2, &idx2);
    std::fs::write(artifact_dir.join(format!("{key2}_0")), b"proc-macro2-rlib").unwrap();

    // Artifact 3: NOT Rust (C++ object file) — should be filtered out
    let key3 = "eeeeeeeeffffffff";
    let idx3 = crate::artifact::ArtifactIndex::new(
        vec!["foo.o".to_string()],
        vec![300],
        vec![],
        vec![],
        0,
    );
    store.insert(key3, &idx3);
    std::fs::write(artifact_dir.join(format!("{key3}_0")), b"object-file").unwrap();

    store.flush().unwrap();
    store.flush().unwrap();
    drop(store);

    // Run warm
    let (restored, skipped, errors) =
        warm_target(&index_path, &artifact_dir, &target_dir, "debug", None).unwrap();

    // Verify counts
    assert_eq!(errors, 0, "should have 0 errors");
    assert_eq!(
        restored, 5,
        "should restore all 5 files (3 serde + 1 proc_macro2 + 1 C++ .o)"
    );
    assert_eq!(skipped, 0, "all payloads exist on disk");

    // Verify files exist at correct paths
    let deps = target_dir.join("debug").join("deps");
    assert!(
        deps.join("libserde-abc123.rlib").exists(),
        "serde rlib missing"
    );
    assert!(
        deps.join("libserde-abc123.rmeta").exists(),
        "serde rmeta missing"
    );
    assert!(
        deps.join("serde-abc123.d").exists(),
        "serde dep-info missing"
    );
    assert!(
        deps.join("libproc_macro2-def456.rlib").exists(),
        "proc_macro2 rlib missing"
    );

    // Verify content is correct
    assert_eq!(
        std::fs::read(deps.join("libserde-abc123.rlib")).unwrap(),
        b"rlib-content"
    );
    assert_eq!(
        std::fs::read(deps.join("libproc_macro2-def456.rlib")).unwrap(),
        b"proc-macro2-rlib"
    );

    // Verify C++ artifact IS restored (warm restores everything, not just Rust)
    assert!(
        deps.join("foo.o").exists(),
        "C++ .o file should also be in deps/"
    );
    assert_eq!(std::fs::read(deps.join("foo.o")).unwrap(), b"object-file");

    // Verify mtime is recent (within 5 seconds)
    let meta = std::fs::metadata(deps.join("libserde-abc123.rlib")).unwrap();
    let age = meta.modified().unwrap().elapsed().unwrap();
    assert!(age.as_secs() < 5, "mtime should be fresh, got {age:?}");
}

#[test]
fn warm_skips_missing_payloads() {
    let dir = tempfile::tempdir().unwrap();
    let cache_dir = dir.path().join("cache");
    let artifact_dir = cache_dir.join("artifacts");
    let index_path = cache_dir.join("index.bin");
    let target_dir = dir.path().join("target");

    std::fs::create_dir_all(&artifact_dir).unwrap();

    let store = crate::artifact::ArtifactStore::open(&index_path).unwrap();
    let key = "1111111122222222";
    let idx = crate::artifact::ArtifactIndex::new(
        vec!["libfoo-xyz.rlib".to_string()],
        vec![100],
        vec![],
        vec![],
        0,
    );
    store.insert(key, &idx);
    // DON'T write the payload file — simulate missing artifact on disk
    store.flush().unwrap();
    drop(store);

    let (restored, skipped, errors) =
        warm_target(&index_path, &artifact_dir, &target_dir, "debug", None).unwrap();

    assert_eq!(restored, 0);
    assert_eq!(skipped, 1, "should skip 1 missing payload");
    assert_eq!(errors, 0);
}

#[test]
fn warm_returns_error_on_missing_index() {
    let dir = tempfile::tempdir().unwrap();
    let result = warm_target(
        &dir.path().join("nonexistent.redb"),
        &dir.path().join("artifacts"),
        &dir.path().join("target"),
        "debug",
        None,
    );
    assert!(result.is_err());
}