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Refactor if-available setting to work in CI

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This verifies if the HEAD sha matches with the detected LLVM SHA, and if not,
permits usage of the detected LLVM. Otherwise, we fallback on regular
non-downloaded LLVM (currently still cached with sccache, though that's still
10+ minutes on macOS).
This commit is contained in:
Mark Rousskov 2022-07-30 17:11:50 -04:00
parent 2769d6b9cc
commit 8ca14aa7ff
3 changed files with 79 additions and 44 deletions
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36
src/bootstrap/config.rs
View file

@ -990,41 +990,7 @@ pub fn parse(args: &[String]) -> Config {
config.llvm_from_ci = match llvm.download_ci_llvm {
Some(StringOrBool::String(s)) => {
assert!(s == "if-available", "unknown option `{}` for download-ci-llvm", s);
// This is currently all tier 1 targets and tier 2 targets with host tools
// (since others may not have CI artifacts)
// https://doc.rust-lang.org/rustc/platform-support.html#tier-1
let supported_platforms = [
// tier 1
"aarch64-unknown-linux-gnu",
"i686-pc-windows-gnu",
"i686-pc-windows-msvc",
"i686-unknown-linux-gnu",
"x86_64-unknown-linux-gnu",
"x86_64-apple-darwin",
"x86_64-pc-windows-gnu",
"x86_64-pc-windows-msvc",
// tier 2 with host tools
"aarch64-apple-darwin",
"aarch64-pc-windows-msvc",
"aarch64-unknown-linux-musl",
"arm-unknown-linux-gnueabi",
"arm-unknown-linux-gnueabihf",
"armv7-unknown-linux-gnueabihf",
"mips-unknown-linux-gnu",
"mips64-unknown-linux-gnuabi64",
"mips64el-unknown-linux-gnuabi64",
"mipsel-unknown-linux-gnu",
"powerpc-unknown-linux-gnu",
"powerpc64-unknown-linux-gnu",
"powerpc64le-unknown-linux-gnu",
"riscv64gc-unknown-linux-gnu",
"s390x-unknown-linux-gnu",
"x86_64-unknown-freebsd",
"x86_64-unknown-illumos",
"x86_64-unknown-linux-musl",
"x86_64-unknown-netbsd",
];
supported_platforms.contains(&&*config.build.triple)
crate::native::is_ci_llvm_available(&config)
}
Some(StringOrBool::Bool(b)) => b,
None => false,

83
src/bootstrap/native.rs
View file

@ -114,23 +114,20 @@ pub fn prebuilt_llvm_config(
Err(Meta { stamp, build_llvm_config, out_dir, root: root.into() })
}
pub(crate) fn maybe_download_ci_llvm(builder: &Builder<'_>) {
let config = &builder.config;
if !config.llvm_from_ci {
return;
}
/// This retrieves the LLVM sha we *want* to use, according to git history.
pub(crate) fn detect_llvm_sha(config: &crate::config::Config) -> String {
let mut rev_list = config.git();
rev_list.args(&[
PathBuf::from("rev-list"),
format!("--author={}", builder.config.stage0_metadata.config.git_merge_commit_email).into(),
format!("--author={}", config.stage0_metadata.config.git_merge_commit_email).into(),
"-n1".into(),
"--first-parent".into(),
"HEAD".into(),
"--".into(),
builder.src.join("src/llvm-project"),
builder.src.join("src/bootstrap/download-ci-llvm-stamp"),
config.src.join("src/llvm-project"),
config.src.join("src/bootstrap/download-ci-llvm-stamp"),
// the LLVM shared object file is named `LLVM-12-rust-{version}-nightly`
builder.src.join("src/version"),
config.src.join("src/version"),
]);
let llvm_sha = output(&mut rev_list);
let llvm_sha = llvm_sha.trim();
@ -143,8 +140,76 @@ pub(crate) fn maybe_download_ci_llvm(builder: &Builder<'_>) {
panic!();
}
llvm_sha.to_owned()
}
/// Returns whether the CI-found LLVM is currently usable.
///
/// This checks both the build triple platform to confirm we're usable at all,
/// and then verifies if the current HEAD matches the detected LLVM SHA head,
/// in which case LLVM is indicated as not available.
pub(crate) fn is_ci_llvm_available(config: &crate::config::Config) -> bool {
// This is currently all tier 1 targets and tier 2 targets with host tools
// (since others may not have CI artifacts)
// https://doc.rust-lang.org/rustc/platform-support.html#tier-1
let supported_platforms = [
// tier 1
"aarch64-unknown-linux-gnu",
"i686-pc-windows-gnu",
"i686-pc-windows-msvc",
"i686-unknown-linux-gnu",
"x86_64-unknown-linux-gnu",
"x86_64-apple-darwin",
"x86_64-pc-windows-gnu",
"x86_64-pc-windows-msvc",
// tier 2 with host tools
"aarch64-apple-darwin",
"aarch64-pc-windows-msvc",
"aarch64-unknown-linux-musl",
"arm-unknown-linux-gnueabi",
"arm-unknown-linux-gnueabihf",
"armv7-unknown-linux-gnueabihf",
"mips-unknown-linux-gnu",
"mips64-unknown-linux-gnuabi64",
"mips64el-unknown-linux-gnuabi64",
"mipsel-unknown-linux-gnu",
"powerpc-unknown-linux-gnu",
"powerpc64-unknown-linux-gnu",
"powerpc64le-unknown-linux-gnu",
"riscv64gc-unknown-linux-gnu",
"s390x-unknown-linux-gnu",
"x86_64-unknown-freebsd",
"x86_64-unknown-illumos",
"x86_64-unknown-linux-musl",
"x86_64-unknown-netbsd",
];
if !supported_platforms.contains(&&*config.build.triple) {
return false;
}
if crate::util::CiEnv::is_ci() {
let llvm_sha = detect_llvm_sha(config);
let head_sha = output(config.git().arg("rev-parse").arg("HEAD"));
let head_sha = head_sha.trim();
if llvm_sha == head_sha {
eprintln!(
"Detected LLVM as non-available: running in CI and modified LLVM in this change"
);
return false;
}
}
true
}
pub(crate) fn maybe_download_ci_llvm(builder: &Builder<'_>) {
let config = &builder.config;
if !config.llvm_from_ci {
return;
}
let llvm_root = config.ci_llvm_root();
let llvm_stamp = llvm_root.join(".llvm-stamp");
let llvm_sha = detect_llvm_sha(&config);
let key = format!("{}{}", llvm_sha, config.llvm_assertions);
if program_out_of_date(&llvm_stamp, &key) && !config.dry_run {
download_ci_llvm(builder, &llvm_sha);

4
src/bootstrap/util.rs
View file

@ -258,6 +258,10 @@ pub fn current() -> CiEnv {
}
}
pub fn is_ci() -> bool {
Self::current() != CiEnv::None
}
/// If in a CI environment, forces the command to run with colors.
pub fn force_coloring_in_ci(self, cmd: &mut Command) {
if self != CiEnv::None {