mirror of
https://github.com/rust-lang/cargo
synced 2024-10-31 08:59:36 +00:00
5217280ee3
This commit updates the locking strategy in Cargo handle the recent addition of creating a cache of the on-disk index also on disk. The goal here is reduce the overhead of locking both cognitively when reading but also performance wise by requiring fewer locks. Previously Cargo had a bunch of fine-grained locks throughout the index and git repositories, but after this commit there's just one global "package cache" lock. This global lock now serves to basically synchronize the entire crate graph resolution step. This shouldn't really take that long unless it's downloading, in which case there's not a ton of benefit to running in parallel anyway. The other intention of this single global lock is to make it much easier on the sources to not worry so much about lock ordering or when to acquire locks, but rather they just assert in their various operations that they're locked. Cargo now has a few coarse-grained locations where locks are held (for example during resolution and during package downloading). These locks are a bit sprinkled about but they have in-code asserts which assert that they're held, so we'll find bugs quickly if any lock isn't held (before a race condition is hit that is)
216 lines
6.1 KiB
Rust
216 lines
6.1 KiB
Rust
use std::collections::HashSet;
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use std::fs::{self, File};
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use std::io::prelude::*;
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use std::path::Path;
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use crate::support::cargo_process;
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use crate::support::git::repo;
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use crate::support::paths;
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use crate::support::registry::{api_path, registry_path, registry_url};
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use url::Url;
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fn api() -> Url {
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Url::from_file_path(&*api_path()).ok().unwrap()
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}
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fn write_crates(dest: &Path) {
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let content = r#"{
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"crates": [{
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"created_at": "2014-11-16T20:17:35Z",
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"description": "Design by contract style assertions for Rust",
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"documentation": null,
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"downloads": 2,
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"homepage": null,
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"id": "hoare",
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"keywords": [],
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"license": null,
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"links": {
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"owners": "/api/v1/crates/hoare/owners",
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"reverse_dependencies": "/api/v1/crates/hoare/reverse_dependencies",
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"version_downloads": "/api/v1/crates/hoare/downloads",
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"versions": "/api/v1/crates/hoare/versions"
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},
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"max_version": "0.1.1",
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"name": "hoare",
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"repository": "https://github.com/nick29581/libhoare",
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"updated_at": "2014-11-20T21:49:21Z",
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"versions": null
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}],
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"meta": {
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"total": 1
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}
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}"#;
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// Older versions of curl don't peel off query parameters when looking for
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// filenames, so just make both files.
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//
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// On windows, though, `?` is an invalid character, but we always build curl
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// from source there anyway!
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File::create(&dest)
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.unwrap()
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.write_all(content.as_bytes())
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.unwrap();
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if !cfg!(windows) {
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File::create(&dest.with_file_name("crates?q=postgres&per_page=10"))
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.unwrap()
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.write_all(content.as_bytes())
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.unwrap();
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}
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}
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fn setup() {
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let cargo_home = paths::root().join(".cargo");
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fs::create_dir_all(cargo_home).unwrap();
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fs::create_dir_all(&api_path().join("api/v1")).unwrap();
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// Init a new registry
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let _ = repo(®istry_path())
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.file(
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"config.json",
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&format!(r#"{{"dl":"{0}","api":"{0}"}}"#, api()),
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)
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.build();
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let base = api_path().join("api/v1/crates");
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write_crates(&base);
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}
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fn set_cargo_config() {
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let config = paths::root().join(".cargo/config");
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File::create(&config)
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.unwrap()
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.write_all(
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format!(
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r#"
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[source.crates-io]
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registry = 'https://wut'
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replace-with = 'dummy-registry'
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[source.dummy-registry]
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registry = '{reg}'
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"#,
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reg = registry_url(),
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)
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.as_bytes(),
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)
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.unwrap();
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}
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#[test]
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fn not_update() {
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setup();
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set_cargo_config();
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use cargo::core::{Shell, Source, SourceId};
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use cargo::sources::RegistrySource;
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use cargo::util::Config;
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let sid = SourceId::for_registry(®istry_url()).unwrap();
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let cfg = Config::new(Shell::new(), paths::root(), paths::home().join(".cargo"));
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let lock = cfg.acquire_package_cache_lock().unwrap();
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let mut regsrc = RegistrySource::remote(sid, &HashSet::new(), &cfg);
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regsrc.update().unwrap();
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drop(lock);
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cargo_process("search postgres")
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.with_stdout_contains("hoare = \"0.1.1\" # Design by contract style assertions for Rust")
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.with_stderr("") // without "Updating ... index"
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.run();
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}
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#[test]
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fn replace_default() {
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setup();
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set_cargo_config();
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cargo_process("search postgres")
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.with_stdout_contains("hoare = \"0.1.1\" # Design by contract style assertions for Rust")
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.with_stderr_contains("[..]Updating [..] index")
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.run();
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}
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#[test]
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fn simple() {
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setup();
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cargo_process("search postgres --index")
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.arg(registry_url().to_string())
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.with_stdout_contains("hoare = \"0.1.1\" # Design by contract style assertions for Rust")
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.run();
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}
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// TODO: Deprecated
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// remove once it has been decided '--host' can be safely removed
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#[test]
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fn simple_with_host() {
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setup();
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cargo_process("search postgres --host")
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.arg(registry_url().to_string())
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.with_stderr(
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"\
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[WARNING] The flag '--host' is no longer valid.
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Previous versions of Cargo accepted this flag, but it is being
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deprecated. The flag is being renamed to 'index', as the flag
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wants the location of the index. Please use '--index' instead.
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This will soon become a hard error, so it's either recommended
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to update to a fixed version or contact the upstream maintainer
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about this warning.
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[UPDATING] `[CWD]/registry` index
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",
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)
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.with_stdout_contains("hoare = \"0.1.1\" # Design by contract style assertions for Rust")
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.run();
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}
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// TODO: Deprecated
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// remove once it has been decided '--host' can be safely removed
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#[test]
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fn simple_with_index_and_host() {
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setup();
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cargo_process("search postgres --index")
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.arg(registry_url().to_string())
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.arg("--host")
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.arg(registry_url().to_string())
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.with_stderr(
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"\
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[WARNING] The flag '--host' is no longer valid.
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Previous versions of Cargo accepted this flag, but it is being
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deprecated. The flag is being renamed to 'index', as the flag
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wants the location of the index. Please use '--index' instead.
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This will soon become a hard error, so it's either recommended
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to update to a fixed version or contact the upstream maintainer
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about this warning.
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[UPDATING] `[CWD]/registry` index
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",
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)
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.with_stdout_contains("hoare = \"0.1.1\" # Design by contract style assertions for Rust")
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.run();
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}
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#[test]
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fn multiple_query_params() {
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setup();
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cargo_process("search postgres sql --index")
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.arg(registry_url().to_string())
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.with_stdout_contains("hoare = \"0.1.1\" # Design by contract style assertions for Rust")
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.run();
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}
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#[test]
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fn help() {
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cargo_process("search -h").run();
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cargo_process("help search").run();
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// Ensure that help output goes to stdout, not stderr.
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cargo_process("search --help").with_stderr("").run();
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cargo_process("search --help")
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.with_stdout_contains("[..] --frozen [..]")
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.run();
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}
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