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,
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();
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);