about summary refs log tree commit diff
path: root/tvix/nix-compat/src/derivation/tests/mod.rs
blob: f3dcb318c9ccebf4bb08110be4406f5b96810992 (plain) (blame)
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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
use crate::derivation::output::Output;
use crate::derivation::Derivation;
use crate::nixhash::NixHash;
use crate::store_path::StorePath;
use bstr::{BStr, BString};
use std::collections::{BTreeMap, BTreeSet};
use std::fs::File;
use std::io::Read;
use std::path::Path;
use std::str::FromStr;
use test_case::test_case;
use test_generator::test_resources;

const RESOURCES_PATHS: &str = "src/derivation/tests/derivation_tests";

fn read_file(path: &str) -> BString {
    let path = Path::new(path);
    let mut file = File::open(path).unwrap();
    let mut file_contents = Vec::new();

    file.read_to_end(&mut file_contents).unwrap();

    file_contents.into()
}

#[test_resources("src/derivation/tests/derivation_tests/*.drv")]
fn check_serizaliation(path_to_drv_file: &str) {
    // skip JSON files known to fail parsing
    if path_to_drv_file.ends_with("cp1252.drv") || path_to_drv_file.ends_with("latin1.drv") {
        return;
    }
    let json_bytes = read_file(&format!("{}.json", path_to_drv_file));
    let derivation: Derivation =
        serde_json::from_slice(&json_bytes).expect("JSON was not well-formatted");

    let mut serialized_derivation = Vec::new();
    derivation.serialize(&mut serialized_derivation).unwrap();

    let expected = read_file(path_to_drv_file);

    assert_eq!(expected, BStr::new(&serialized_derivation));
}

#[test_resources("src/derivation/tests/derivation_tests/*.drv")]
fn validate(path_to_drv_file: &str) {
    // skip JSON files known to fail parsing
    if path_to_drv_file.ends_with("cp1252.drv") || path_to_drv_file.ends_with("latin1.drv") {
        return;
    }
    let json_bytes = read_file(&format!("{}.json", path_to_drv_file));
    let derivation: Derivation =
        serde_json::from_slice(&json_bytes).expect("JSON was not well-formatted");

    derivation
        .validate(true)
        .expect("derivation failed to validate")
}

#[test_resources("src/derivation/tests/derivation_tests/*.drv")]
fn check_to_aterm_bytes(path_to_drv_file: &str) {
    // skip JSON files known to fail parsing
    if path_to_drv_file.ends_with("cp1252.drv") || path_to_drv_file.ends_with("latin1.drv") {
        return;
    }
    let json_bytes = read_file(&format!("{}.json", path_to_drv_file));
    let derivation: Derivation =
        serde_json::from_slice(&json_bytes).expect("JSON was not well-formatted");

    let expected = read_file(path_to_drv_file);

    assert_eq!(expected, BStr::new(&derivation.to_aterm_bytes()));
}

#[test_case("bar","0hm2f1psjpcwg8fijsmr4wwxrx59s092-bar.drv"; "fixed_sha256")]
#[test_case("foo", "4wvvbi4jwn0prsdxb7vs673qa5h9gr7x-foo.drv"; "simple-sha256")]
#[test_case("bar", "ss2p4wmxijn652haqyd7dckxwl4c7hxx-bar.drv"; "fixed-sha1")]
#[test_case("foo", "ch49594n9avinrf8ip0aslidkc4lxkqv-foo.drv"; "simple-sha1")]
#[test_case("has-multi-out", "h32dahq0bx5rp1krcdx3a53asj21jvhk-has-multi-out.drv"; "multiple-outputs")]
#[test_case("structured-attrs", "9lj1lkjm2ag622mh4h9rpy6j607an8g2-structured-attrs.drv"; "structured-attrs")]
#[test_case("unicode", "52a9id8hx688hvlnz4d1n25ml1jdykz0-unicode.drv"; "unicode")]
fn derivation_path(name: &str, expected_path: &str) {
    let json_bytes = read_file(&format!("{}/{}.json", RESOURCES_PATHS, expected_path));
    let derivation: Derivation =
        serde_json::from_slice(&json_bytes).expect("JSON was not well-formatted");

    assert_eq!(
        derivation.calculate_derivation_path(name).unwrap(),
        StorePath::from_str(expected_path).unwrap()
    );
}

/// This trims all output paths from a Derivation struct,
/// by setting outputs[$outputName].path and environment[$outputName] to the empty string.
fn derivation_with_trimmed_output_paths(derivation: &Derivation) -> Derivation {
    let mut trimmed_env = derivation.environment.clone();
    let mut trimmed_outputs = derivation.outputs.clone();

    for (output_name, output) in &derivation.outputs {
        trimmed_env.insert(output_name.clone(), "".into());
        assert!(trimmed_outputs.contains_key(output_name));
        trimmed_outputs.insert(
            output_name.to_string(),
            Output {
                path: "".to_string(),
                ..output.clone()
            },
        );
    }

    // replace environment and outputs with the trimmed variants
    Derivation {
        environment: trimmed_env,
        outputs: trimmed_outputs,
        ..derivation.clone()
    }
}

#[test_case("0hm2f1psjpcwg8fijsmr4wwxrx59s092-bar.drv", "sha256:724f3e3634fce4cbbbd3483287b8798588e80280660b9a63fd13a1bc90485b33"; "fixed_sha256")]
#[test_case("ss2p4wmxijn652haqyd7dckxwl4c7hxx-bar.drv", "sha256:c79aebd0ce3269393d4a1fde2cbd1d975d879b40f0bf40a48f550edc107fd5df";"fixed-sha1")]
fn derivation_or_fod_hash(drv_path: &str, expected_nix_hash_string: &str) {
    // read in the fixture
    let json_bytes = read_file(&format!("{}/{}.json", RESOURCES_PATHS, drv_path));
    let drv: Derivation = serde_json::from_slice(&json_bytes).expect("must deserialize");

    let actual = drv.derivation_or_fod_hash(|_| panic!("must not be called"));

    assert_eq!(expected_nix_hash_string, actual.to_nix_hash_string());
}

#[test_case("bar","0hm2f1psjpcwg8fijsmr4wwxrx59s092-bar.drv"; "fixed_sha256")]
#[test_case("foo", "4wvvbi4jwn0prsdxb7vs673qa5h9gr7x-foo.drv"; "simple-sha256")]
#[test_case("bar", "ss2p4wmxijn652haqyd7dckxwl4c7hxx-bar.drv"; "fixed-sha1")]
#[test_case("foo", "ch49594n9avinrf8ip0aslidkc4lxkqv-foo.drv"; "simple-sha1")]
#[test_case("has-multi-out", "h32dahq0bx5rp1krcdx3a53asj21jvhk-has-multi-out.drv"; "multiple-outputs")]
#[test_case("structured-attrs", "9lj1lkjm2ag622mh4h9rpy6j607an8g2-structured-attrs.drv"; "structured-attrs")]
#[test_case("unicode", "52a9id8hx688hvlnz4d1n25ml1jdykz0-unicode.drv"; "unicode")]
fn output_paths(name: &str, drv_path: &str) {
    // read in the fixture
    let json_bytes = read_file(&format!("{}/{}.json", RESOURCES_PATHS, drv_path));
    let expected_derivation: Derivation =
        serde_json::from_slice(&json_bytes).expect("must deserialize");

    let mut derivation = derivation_with_trimmed_output_paths(&expected_derivation);

    // calculate the derivation_or_fod_hash of derivation
    // We don't expect the lookup function to be called for most derivations.
    let calculated_derivation_or_fod_hash = derivation.derivation_or_fod_hash(|parent_drv_path| {
        // 4wvvbi4jwn0prsdxb7vs673qa5h9gr7x-foo.drv may lookup /nix/store/0hm2f1psjpcwg8fijsmr4wwxrx59s092-bar.drv
        // ch49594n9avinrf8ip0aslidkc4lxkqv-foo.drv may lookup /nix/store/ss2p4wmxijn652haqyd7dckxwl4c7hxx-bar.drv
        if name == "foo"
            && ((drv_path == "4wvvbi4jwn0prsdxb7vs673qa5h9gr7x-foo.drv"
                && parent_drv_path == "/nix/store/0hm2f1psjpcwg8fijsmr4wwxrx59s092-bar.drv")
                || (drv_path == "ch49594n9avinrf8ip0aslidkc4lxkqv-foo.drv"
                    && parent_drv_path == "/nix/store/ss2p4wmxijn652haqyd7dckxwl4c7hxx-bar.drv"))
        {
            // do the lookup, by reading in the fixture of the requested
            // drv_name, and calculating its drv replacement (on the non-stripped version)
            // In a real-world scenario you would have already done this during construction.

            let json_bytes = read_file(&format!(
                "{}/{}.json",
                RESOURCES_PATHS,
                Path::new(parent_drv_path)
                    .file_name()
                    .unwrap()
                    .to_string_lossy()
            ));

            let drv: Derivation = serde_json::from_slice(&json_bytes).expect("must deserialize");

            // calculate derivation_or_fod_hash for each parent.
            // This may not trigger subsequent requests, as both parents are FOD.
            drv.derivation_or_fod_hash(|_| panic!("must not lookup"))
        } else {
            // we only expect this to be called in the "foo" testcase, for the "bar derivations"
            panic!("may only be called for foo testcase on bar derivations");
        }
    });

    derivation
        .calculate_output_paths(name, &calculated_derivation_or_fod_hash)
        .unwrap();

    // The derivation should now look like it was before
    assert_eq!(expected_derivation, derivation);
}

/// Exercises the output path calculation functions like a constructing client
/// (an implementation of builtins.derivation) would do:
///
/// ```nix
/// rec {
///   bar = builtins.derivation {
///     name = "bar";
///     builder = ":";
///     system = ":";
///     outputHash = "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba";
///     outputHashAlgo = "sha256";
///     outputHashMode = "recursive";
///   };
///
///   foo = builtins.derivation {
///     name = "foo";
///     builder = ":";
///     system = ":";
///     inherit bar;
///   };
/// }
/// ```
/// It first assembles the bar derivation, does the output path calculation on
/// it, then continues with the foo derivation.
///
/// The code ensures the resulting Derivations match our fixtures.
#[test]
fn output_path_construction() {
    // create the bar derivation
    let mut bar_drv = Derivation {
        builder: ":".to_string(),
        system: ":".to_string(),
        ..Default::default()
    };

    // assemble bar env
    let bar_env = &mut bar_drv.environment;
    bar_env.insert("builder".to_string(), ":".into());
    bar_env.insert("name".to_string(), "bar".into());
    bar_env.insert("out".to_string(), "".into()); // will be calculated
    bar_env.insert(
        "outputHash".to_string(),
        "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba".into(),
    );
    bar_env.insert("outputHashAlgo".to_string(), "sha256".into());
    bar_env.insert("outputHashMode".to_string(), "recursive".into());
    bar_env.insert("system".to_string(), ":".into());

    // assemble bar outputs
    bar_drv.outputs.insert(
        "out".to_string(),
        Output {
            path: "".to_string(), // will be calculated
            hash_with_mode: Some(crate::nixhash::NixHashWithMode::Recursive(NixHash {
                digest: data_encoding::HEXLOWER
                    .decode(
                        "08813cbee9903c62be4c5027726a418a300da4500b2d369d3af9286f4815ceba"
                            .as_bytes(),
                    )
                    .unwrap(),
                algo: crate::nixhash::HashAlgo::Sha256,
            })),
        },
    );

    // calculate bar output paths
    let bar_calc_result = bar_drv.calculate_output_paths(
        "bar",
        &bar_drv.derivation_or_fod_hash(|_| panic!("is FOD, should not lookup")),
    );
    assert!(bar_calc_result.is_ok());

    // ensure it matches our bar fixture
    let bar_json_bytes = read_file(&format!(
        "{}/{}.json",
        RESOURCES_PATHS, "0hm2f1psjpcwg8fijsmr4wwxrx59s092-bar.drv"
    ));
    let bar_drv_expected: Derivation =
        serde_json::from_slice(&bar_json_bytes).expect("must deserialize");
    assert_eq!(bar_drv_expected, bar_drv);

    // now construct foo, which requires bar_drv
    // Note how we refer to the output path, drv name and replacement_str (with calculated output paths) of bar.
    let bar_output_path = &bar_drv.outputs.get("out").expect("must exist").path;
    let bar_drv_derivation_or_fod_hash =
        bar_drv.derivation_or_fod_hash(|_| panic!("is FOD, should not lookup"));

    let bar_drv_path = bar_drv
        .calculate_derivation_path("bar")
        .expect("must succeed");

    // create foo derivation
    let mut foo_drv = Derivation {
        builder: ":".to_string(),
        system: ":".to_string(),
        ..Default::default()
    };

    // assemble foo env
    let foo_env = &mut foo_drv.environment;
    foo_env.insert("bar".to_string(), bar_output_path.to_owned().into());
    foo_env.insert("builder".to_string(), ":".into());
    foo_env.insert("name".to_string(), "foo".into());
    foo_env.insert("out".to_string(), "".into()); // will be calculated
    foo_env.insert("system".to_string(), ":".into());

    // asssemble foo outputs
    foo_drv.outputs.insert(
        "out".to_string(),
        Output {
            path: "".to_string(), // will be calculated
            hash_with_mode: None,
        },
    );

    // assemble foo input_derivations
    foo_drv.input_derivations.insert(
        bar_drv_path.to_absolute_path(),
        BTreeSet::from(["out".to_string()]),
    );

    // calculate foo output paths
    let foo_calc_result = foo_drv.calculate_output_paths(
        "foo",
        &foo_drv.derivation_or_fod_hash(|drv_path| {
            if drv_path != "/nix/store/0hm2f1psjpcwg8fijsmr4wwxrx59s092-bar.drv" {
                panic!("lookup called with unexpected drv_path: {}", drv_path);
            }
            bar_drv_derivation_or_fod_hash.clone()
        }),
    );
    assert!(foo_calc_result.is_ok());

    // ensure it matches our foo fixture
    let foo_json_bytes = read_file(&format!(
        "{}/{}.json",
        RESOURCES_PATHS, "4wvvbi4jwn0prsdxb7vs673qa5h9gr7x-foo.drv",
    ));
    let foo_drv_expected: Derivation =
        serde_json::from_slice(&foo_json_bytes).expect("must deserialize");
    assert_eq!(foo_drv_expected, foo_drv);

    assert_eq!(
        StorePath::from_str("4wvvbi4jwn0prsdxb7vs673qa5h9gr7x-foo.drv").expect("must succeed"),
        foo_drv
            .calculate_derivation_path("foo")
            .expect("must succeed")
    );
}

/// This constructs a Derivation using cp1252 encoding and ensures the
/// calculated derivation path matches the one Nix does calculate, as
/// well as the ATerm serialization.
/// We can't add this as a test_case to `output_paths`, as the JSON parser
/// refuses to parse our JSONs.
/// It looks like more recent versions of Nix also seem to not produce these
/// JSON files anymore, however, it still happily produces the .drv files in
/// the store.
#[test_case(
    "cp1252",
    vec![0xc5, 0xc4, 0xd6],
    "/nix/store/drr2mjp9fp9vvzsf5f9p0a80j33dxy7m-cp1252",
    "m1vfixn8iprlf0v9abmlrz7mjw1xj8kp-cp1252.drv";
    "cp1252"
)]
#[test_case(
    "latin1",
    vec![0xc5, 0xc4, 0xd6],
    "/nix/store/x1f6jfq9qgb6i8jrmpifkn9c64fg4hcm-latin1",
    "x6p0hg79i3wg0kkv7699935f7rrj9jf3-latin1.drv";
    "latin1"
)]
fn non_unicode(name: &str, chars: Vec<u8>, exp_output_path: &str, exp_derivation_path: &str) {
    // construct the Derivation
    let mut outputs: BTreeMap<String, Output> = BTreeMap::new();
    outputs.insert(
        "out".to_string(),
        Output {
            path: exp_output_path.to_string(),
            ..Default::default()
        },
    );

    let mut environment: BTreeMap<String, BString> = BTreeMap::new();
    environment.insert("builder".to_string(), ":".into());
    environment.insert("chars".to_string(), chars.into());
    environment.insert("name".to_string(), name.into());
    environment.insert("out".to_string(), exp_output_path.into());
    environment.insert("system".to_string(), ":".into());
    let derivation: Derivation = Derivation {
        builder: ":".to_string(),
        environment,
        outputs,
        system: ":".to_string(),
        ..Default::default()
    };

    // check the derivation_path matches what Nix calculated.
    let actual_drv_path = derivation.calculate_derivation_path(name).unwrap();
    assert_eq!(exp_derivation_path.to_string(), actual_drv_path.to_string());

    // Now wipe the output path info, and ensure we calculate the same output
    // path.
    {
        let mut derivation = derivation_with_trimmed_output_paths(&derivation);
        let calculated_derivation_or_fod_hash = derivation.derivation_or_fod_hash(|_| {
            panic!("No parents expected");
        });
        derivation
            .calculate_output_paths(name, &calculated_derivation_or_fod_hash)
            .unwrap();

        assert_eq!(
            exp_output_path.to_string(),
            derivation.outputs.get("out").unwrap().path,
            "expected calculated output path to match"
        );
    }

    // Construct the ATerm representation and compare with our fixture.
    {
        let aterm_bytes = read_file(&format!("{}/{}", RESOURCES_PATHS, exp_derivation_path));
        assert_eq!(
            aterm_bytes,
            BStr::new(&derivation.to_aterm_bytes()),
            "expected ATerm serialization to match",
        );
    }
}