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|
use crate::splicing::SourceInfo;
use anyhow::{Context, Result};
use crates_index::IndexConfig;
use hex::ToHex;
pub(crate) enum CrateIndexLookup {
Git(crates_index::GitIndex),
Http(crates_index::SparseIndex),
}
impl CrateIndexLookup {
pub(crate) fn get_source_info(&self, pkg: &cargo_lock::Package) -> Result<Option<SourceInfo>> {
let index_config = self
.index_config()
.context("Failed to get crate index config")?;
let crate_ = match self {
// The crates we care about should all be in the cache already,
// because `cargo metadata` ran which should have fetched them.
Self::Http(index) => Some(
index
.crate_from_cache(pkg.name.as_str())
.with_context(|| format!("Failed to get crate from cache for {pkg:?}"))?,
),
Self::Git(index) => index.crate_(pkg.name.as_str()),
};
let source_info = crate_.and_then(|crate_idx| {
crate_idx
.versions()
.iter()
.find(|v| v.version() == pkg.version.to_string())
.and_then(|v| {
v.download_url(&index_config).map(|url| {
let sha256 = pkg
.checksum
.as_ref()
.and_then(|sum| sum.as_sha256().map(|sum| sum.encode_hex::<String>()))
.unwrap_or_else(|| v.checksum().encode_hex::<String>());
SourceInfo { url, sha256 }
})
})
});
Ok(source_info)
}
#[allow(clippy::result_large_err)]
fn index_config(&self) -> Result<IndexConfig, crates_index::Error> {
match self {
Self::Git(index) => index.index_config(),
Self::Http(index) => index.index_config(),
}
}
}
#[cfg(test)]
mod test {
use crate::splicing::crate_index_lookup::CrateIndexLookup;
use semver::Version;
use std::ffi::OsString;
// TODO: Avoid global state (env vars) in these tests.
// TODO: These should be separate tests methods but they have conflicting state.
#[test]
fn sparse_index() {
let runfiles = runfiles::Runfiles::create().unwrap();
{
let _e = EnvVarResetter::set(
"CARGO_HOME",
runfiles.rlocation(
"rules_rust/crate_universe/test_data/crate_indexes/lazy_static/cargo_home",
),
);
let index = CrateIndexLookup::Http(
crates_index::SparseIndex::from_url("sparse+https://index.crates.io/").unwrap(),
);
let source_info = index
.get_source_info(&cargo_lock::Package {
name: "lazy_static".parse().unwrap(),
version: Version::parse("1.4.0").unwrap(),
source: None,
checksum: None,
dependencies: Vec::new(),
replace: None,
})
.unwrap()
.unwrap();
assert_eq!(
source_info.url,
"https://crates.io/api/v1/crates/lazy_static/1.4.0/download"
);
assert_eq!(
source_info.sha256,
"e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
);
}
{
let _e = EnvVarResetter::set("CARGO_HOME", runfiles.rlocation("rules_rust/crate_universe/test_data/crate_indexes/rewritten_lazy_static/cargo_home"));
let index = CrateIndexLookup::Http(
crates_index::SparseIndex::from_url("sparse+https://index.crates.io/").unwrap(),
);
let source_info = index
.get_source_info(&cargo_lock::Package {
name: "lazy_static".parse().unwrap(),
version: Version::parse("1.4.0").unwrap(),
source: None,
checksum: None,
dependencies: Vec::new(),
replace: None,
})
.unwrap()
.unwrap();
assert_eq!(
source_info.url,
"https://some-mirror.com/api/v1/crates/lazy_static/1.4.0/download"
);
assert_eq!(
source_info.sha256,
"fffffffffbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
);
}
}
struct EnvVarResetter {
key: OsString,
value: Option<OsString>,
}
impl EnvVarResetter {
fn set<K: Into<OsString>, V: Into<OsString>>(key: K, value: V) -> EnvVarResetter {
let key = key.into();
let value = value.into();
let old_value = std::env::var_os(&key);
std::env::set_var(&key, value);
EnvVarResetter {
key,
value: old_value,
}
}
}
impl Drop for EnvVarResetter {
fn drop(&mut self) {
if let Some(old_value) = self.value.as_ref() {
std::env::set_var(&self.key, old_value);
} else {
std::env::remove_var(&self.key);
}
}
}
}
|
