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Diffstat (limited to 'src/bootstrap/sanity.rs')
| -rw-r--r-- | src/bootstrap/sanity.rs | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/src/bootstrap/sanity.rs b/src/bootstrap/sanity.rs new file mode 100644 index 000000000..cae41286f --- /dev/null +++ b/src/bootstrap/sanity.rs @@ -0,0 +1,242 @@ +//! Sanity checking performed by rustbuild before actually executing anything. +//! +//! This module contains the implementation of ensuring that the build +//! environment looks reasonable before progressing. This will verify that +//! various programs like git and python exist, along with ensuring that all C +//! compilers for cross-compiling are found. +//! +//! In theory if we get past this phase it's a bug if a build fails, but in +//! practice that's likely not true! + +use std::collections::HashMap; +use std::env; +use std::ffi::{OsStr, OsString}; +use std::fs; +use std::path::PathBuf; +use std::process::Command; + +use crate::cache::INTERNER; +use crate::config::Target; +use crate::util::output; +use crate::Build; + +pub struct Finder { + cache: HashMap<OsString, Option<PathBuf>>, + path: OsString, +} + +impl Finder { + pub fn new() -> Self { + Self { cache: HashMap::new(), path: env::var_os("PATH").unwrap_or_default() } + } + + pub fn maybe_have<S: Into<OsString>>(&mut self, cmd: S) -> Option<PathBuf> { + let cmd: OsString = cmd.into(); + let path = &self.path; + self.cache + .entry(cmd.clone()) + .or_insert_with(|| { + for path in env::split_paths(path) { + let target = path.join(&cmd); + let mut cmd_exe = cmd.clone(); + cmd_exe.push(".exe"); + + if target.is_file() // some/path/git + || path.join(&cmd_exe).exists() // some/path/git.exe + || target.join(&cmd_exe).exists() + // some/path/git/git.exe + { + return Some(target); + } + } + None + }) + .clone() + } + + pub fn must_have<S: AsRef<OsStr>>(&mut self, cmd: S) -> PathBuf { + self.maybe_have(&cmd).unwrap_or_else(|| { + panic!("\n\ncouldn't find required command: {:?}\n\n", cmd.as_ref()); + }) + } +} + +pub fn check(build: &mut Build) { + let path = env::var_os("PATH").unwrap_or_default(); + // On Windows, quotes are invalid characters for filename paths, and if + // one is present as part of the PATH then that can lead to the system + // being unable to identify the files properly. See + // https://github.com/rust-lang/rust/issues/34959 for more details. + if cfg!(windows) && path.to_string_lossy().contains('\"') { + panic!("PATH contains invalid character '\"'"); + } + + let mut cmd_finder = Finder::new(); + // If we've got a git directory we're gonna need git to update + // submodules and learn about various other aspects. + if build.rust_info.is_git() { + cmd_finder.must_have("git"); + } + + // We need cmake, but only if we're actually building LLVM or sanitizers. + let building_llvm = build.config.rust_codegen_backends.contains(&INTERNER.intern_str("llvm")) + && build + .hosts + .iter() + .map(|host| { + build + .config + .target_config + .get(host) + .map(|config| config.llvm_config.is_none()) + .unwrap_or(true) + }) + .any(|build_llvm_ourselves| build_llvm_ourselves); + let need_cmake = building_llvm || build.config.any_sanitizers_enabled(); + if need_cmake { + if cmd_finder.maybe_have("cmake").is_none() { + eprintln!( + " +Couldn't find required command: cmake + +You should install cmake, or set `download-ci-llvm = true` in the +`[llvm]` section section of `config.toml` to download LLVM rather +than building it. +" + ); + crate::detail_exit(1); + } + } + + build.config.python = build + .config + .python + .take() + .map(|p| cmd_finder.must_have(p)) + .or_else(|| env::var_os("BOOTSTRAP_PYTHON").map(PathBuf::from)) // set by bootstrap.py + .or_else(|| cmd_finder.maybe_have("python")) + .or_else(|| cmd_finder.maybe_have("python3")) + .or_else(|| cmd_finder.maybe_have("python2")); + + build.config.nodejs = build + .config + .nodejs + .take() + .map(|p| cmd_finder.must_have(p)) + .or_else(|| cmd_finder.maybe_have("node")) + .or_else(|| cmd_finder.maybe_have("nodejs")); + + build.config.npm = build + .config + .npm + .take() + .map(|p| cmd_finder.must_have(p)) + .or_else(|| cmd_finder.maybe_have("npm")); + + build.config.gdb = build + .config + .gdb + .take() + .map(|p| cmd_finder.must_have(p)) + .or_else(|| cmd_finder.maybe_have("gdb")); + + // We're gonna build some custom C code here and there, host triples + // also build some C++ shims for LLVM so we need a C++ compiler. + for target in &build.targets { + // On emscripten we don't actually need the C compiler to just + // build the target artifacts, only for testing. For the sake + // of easier bot configuration, just skip detection. + if target.contains("emscripten") { + continue; + } + + // We don't use a C compiler on wasm32 + if target.contains("wasm32") { + continue; + } + + if !build.config.dry_run { + cmd_finder.must_have(build.cc(*target)); + if let Some(ar) = build.ar(*target) { + cmd_finder.must_have(ar); + } + } + } + + for host in &build.hosts { + if !build.config.dry_run { + cmd_finder.must_have(build.cxx(*host).unwrap()); + } + } + + if build.config.rust_codegen_backends.contains(&INTERNER.intern_str("llvm")) { + // Externally configured LLVM requires FileCheck to exist + let filecheck = build.llvm_filecheck(build.build); + if !filecheck.starts_with(&build.out) && !filecheck.exists() && build.config.codegen_tests { + panic!("FileCheck executable {:?} does not exist", filecheck); + } + } + + for target in &build.targets { + build + .config + .target_config + .entry(*target) + .or_insert_with(|| Target::from_triple(&target.triple)); + + if target.contains("-none-") || target.contains("nvptx") { + if build.no_std(*target) == Some(false) { + panic!("All the *-none-* and nvptx* targets are no-std targets") + } + } + + // Make sure musl-root is valid + if target.contains("musl") { + // If this is a native target (host is also musl) and no musl-root is given, + // fall back to the system toolchain in /usr before giving up + if build.musl_root(*target).is_none() && build.config.build == *target { + let target = build.config.target_config.entry(*target).or_default(); + target.musl_root = Some("/usr".into()); + } + match build.musl_libdir(*target) { + Some(libdir) => { + if fs::metadata(libdir.join("libc.a")).is_err() { + panic!("couldn't find libc.a in musl libdir: {}", libdir.display()); + } + } + None => panic!( + "when targeting MUSL either the rust.musl-root \ + option or the target.$TARGET.musl-root option must \ + be specified in config.toml" + ), + } + } + + if need_cmake && target.contains("msvc") { + // There are three builds of cmake on windows: MSVC, MinGW, and + // Cygwin. The Cygwin build does not have generators for Visual + // Studio, so detect that here and error. + let out = output(Command::new("cmake").arg("--help")); + if !out.contains("Visual Studio") { + panic!( + " +cmake does not support Visual Studio generators. + +This is likely due to it being an msys/cygwin build of cmake, +rather than the required windows version, built using MinGW +or Visual Studio. + +If you are building under msys2 try installing the mingw-w64-x86_64-cmake +package instead of cmake: + +$ pacman -R cmake && pacman -S mingw-w64-x86_64-cmake +" + ); + } + } + } + + if let Some(ref s) = build.config.ccache { + cmd_finder.must_have(s); + } +} |