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add a test for touching fingerprint

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This commit is contained in:
Eh2406 2019-01-12 23:06:47 -05:00
parent 80f7b901cb
commit e31003af8f
1 changed files with 85 additions and 0 deletions
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85
tests/testsuite/freshness.rs
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@ -1257,6 +1257,91 @@ fn simple_deps_cleaner_dose_not_rebuild() {
.run();
}
fn fingerprint_cleaner(mut dir: PathBuf, timestamp: filetime::FileTime) {
// Cargo is experimenting with letting outside projects develop some
// limited forms of GC for target_dir. This is one of the forms.
// Specifically, Cargo is updating the mtime of a file in
// target/profile/.fingerprint each time it uses the fingerprint.
// So a cleaner can remove files associated with a fingerprint
// if all the files in the fingerprint's folder are older then a time stamp without
// effecting any builds that happened since that time stamp.
let mut cleand = false;
dir.push(".fingerprint");
for fing in fs::read_dir(&dir).unwrap() {
let fing = fing.unwrap();
if fs::read_dir(fing.path()).unwrap().all(|f| {
filetime::FileTime::from_last_modification_time(&f.unwrap().metadata().unwrap())
<= timestamp
}) {
fs::remove_dir_all(fing.path()).unwrap();
// a real cleaner would remove the big files in deps and build as well
// but fingerprint is sufficient for our tests
cleand = true;
} else {
}
}
assert!(
cleand,
"called fingerprint_cleaner, but there was nothing to remove"
);
}
#[test]
fn fingerprint_cleaner_dose_not_rebuild() {
let p = project()
.file(
"Cargo.toml",
r#"
[package]
name = "foo"
version = "0.0.1"
[dependencies]
bar = { path = "bar" }
"#,
)
.file("src/lib.rs", "")
.file("bar/Cargo.toml", &basic_manifest("bar", "0.0.1"))
.file("bar/src/lib.rs", "")
.build();
p.cargo("build").run();
p.cargo("build")
.env("RUSTFLAGS", "-C target-cpu=native")
.with_stderr(
"\
[COMPILING] bar v0.0.1 ([..])
[COMPILING] foo v0.0.1 ([..])
[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]",
)
.run();
if is_coarse_mtime() {
sleep_ms(1000);
}
let timestamp = filetime::FileTime::from_system_time(SystemTime::now());
// This dose not make new files, but it dose update the mtime.
p.cargo("build")
.env("RUSTFLAGS", "-C target-cpu=native")
.with_stderr("[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]")
.run();
fingerprint_cleaner(p.target_debug_dir(), timestamp);
// This should not recompile!
p.cargo("build")
.env("RUSTFLAGS", "-C target-cpu=native")
.with_stderr("[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]")
.run();
// But this should be cleaned and so need a rebuild
p.cargo("build")
.with_stderr(
"\
[COMPILING] bar v0.0.1 ([..])
[COMPILING] foo v0.0.1 ([..])
[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]",
)
.run();
}
#[test]
fn reuse_panic_build_dep_test() {
let p = project()