From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- src/bootstrap/config.rs | 1668 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1668 insertions(+) create mode 100644 src/bootstrap/config.rs (limited to 'src/bootstrap/config.rs') diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs new file mode 100644 index 000000000..4325a237c --- /dev/null +++ b/src/bootstrap/config.rs @@ -0,0 +1,1668 @@ +//! Serialized configuration of a build. +//! +//! This module implements parsing `config.toml` configuration files to tweak +//! how the build runs. + +use std::cell::{Cell, RefCell}; +use std::cmp; +use std::collections::{HashMap, HashSet}; +use std::env; +use std::ffi::OsStr; +use std::fmt; +use std::fs; +use std::path::{Path, PathBuf}; +use std::process::Command; +use std::str::FromStr; + +use crate::builder::{Builder, TaskPath}; +use crate::cache::{Interned, INTERNER}; +use crate::channel::GitInfo; +pub use crate::flags::Subcommand; +use crate::flags::{Color, Flags}; +use crate::util::{exe, output, program_out_of_date, t}; +use once_cell::sync::OnceCell; +use serde::{Deserialize, Deserializer}; + +macro_rules! check_ci_llvm { + ($name:expr) => { + assert!( + $name.is_none(), + "setting {} is incompatible with download-ci-llvm.", + stringify!($name) + ); + }; +} + +/// Global configuration for the entire build and/or bootstrap. +/// +/// This structure is derived from a combination of both `config.toml` and +/// `config.mk`. As of the time of this writing it's unlikely that `config.toml` +/// is used all that much, so this is primarily filled out by `config.mk` which +/// is generated from `./configure`. +/// +/// Note that this structure is not decoded directly into, but rather it is +/// filled out from the decoded forms of the structs below. For documentation +/// each field, see the corresponding fields in +/// `config.toml.example`. +#[derive(Default)] +#[cfg_attr(test, derive(Clone))] +pub struct Config { + pub changelog_seen: Option, + pub ccache: Option, + /// Call Build::ninja() instead of this. + pub ninja_in_file: bool, + pub verbose: usize, + pub submodules: Option, + pub compiler_docs: bool, + pub docs_minification: bool, + pub docs: bool, + pub locked_deps: bool, + pub vendor: bool, + pub target_config: HashMap, + pub full_bootstrap: bool, + pub extended: bool, + pub tools: Option>, + pub sanitizers: bool, + pub profiler: bool, + pub ignore_git: bool, + pub exclude: Vec, + pub include_default_paths: bool, + pub rustc_error_format: Option, + pub json_output: bool, + pub test_compare_mode: bool, + pub color: Color, + pub patch_binaries_for_nix: bool, + pub stage0_metadata: Stage0Metadata, + + pub on_fail: Option, + pub stage: u32, + pub keep_stage: Vec, + pub keep_stage_std: Vec, + pub src: PathBuf, + /// defaults to `config.toml` + pub config: PathBuf, + pub jobs: Option, + pub cmd: Subcommand, + pub incremental: bool, + pub dry_run: bool, + /// `None` if we shouldn't download CI compiler artifacts, or the commit to download if we should. + #[cfg(not(test))] + download_rustc_commit: Option, + #[cfg(test)] + pub download_rustc_commit: Option, + + pub deny_warnings: bool, + pub backtrace_on_ice: bool, + + // llvm codegen options + pub llvm_skip_rebuild: bool, + pub llvm_assertions: bool, + pub llvm_tests: bool, + pub llvm_plugins: bool, + pub llvm_optimize: bool, + pub llvm_thin_lto: bool, + pub llvm_release_debuginfo: bool, + pub llvm_version_check: bool, + pub llvm_static_stdcpp: bool, + /// `None` if `llvm_from_ci` is true and we haven't yet downloaded llvm. + #[cfg(not(test))] + llvm_link_shared: Cell>, + #[cfg(test)] + pub llvm_link_shared: Cell>, + pub llvm_clang_cl: Option, + pub llvm_targets: Option, + pub llvm_experimental_targets: Option, + pub llvm_link_jobs: Option, + pub llvm_version_suffix: Option, + pub llvm_use_linker: Option, + pub llvm_allow_old_toolchain: bool, + pub llvm_polly: bool, + pub llvm_clang: bool, + pub llvm_from_ci: bool, + pub llvm_build_config: HashMap, + + pub use_lld: bool, + pub lld_enabled: bool, + pub llvm_tools_enabled: bool, + + pub llvm_cflags: Option, + pub llvm_cxxflags: Option, + pub llvm_ldflags: Option, + pub llvm_use_libcxx: bool, + + // rust codegen options + pub rust_optimize: bool, + pub rust_codegen_units: Option, + pub rust_codegen_units_std: Option, + pub rust_debug_assertions: bool, + pub rust_debug_assertions_std: bool, + pub rust_overflow_checks: bool, + pub rust_overflow_checks_std: bool, + pub rust_debug_logging: bool, + pub rust_debuginfo_level_rustc: u32, + pub rust_debuginfo_level_std: u32, + pub rust_debuginfo_level_tools: u32, + pub rust_debuginfo_level_tests: u32, + pub rust_split_debuginfo: SplitDebuginfo, + pub rust_rpath: bool, + pub rustc_parallel: bool, + pub rustc_default_linker: Option, + pub rust_optimize_tests: bool, + pub rust_dist_src: bool, + pub rust_codegen_backends: Vec>, + pub rust_verify_llvm_ir: bool, + pub rust_thin_lto_import_instr_limit: Option, + pub rust_remap_debuginfo: bool, + pub rust_new_symbol_mangling: Option, + pub rust_profile_use: Option, + pub rust_profile_generate: Option, + pub llvm_profile_use: Option, + pub llvm_profile_generate: bool, + pub llvm_libunwind_default: Option, + + pub build: TargetSelection, + pub hosts: Vec, + pub targets: Vec, + pub local_rebuild: bool, + pub jemalloc: bool, + pub control_flow_guard: bool, + + // dist misc + pub dist_sign_folder: Option, + pub dist_upload_addr: Option, + pub dist_compression_formats: Option>, + + // libstd features + pub backtrace: bool, // support for RUST_BACKTRACE + + // misc + pub low_priority: bool, + pub channel: String, + pub description: Option, + pub verbose_tests: bool, + pub save_toolstates: Option, + pub print_step_timings: bool, + pub print_step_rusage: bool, + pub missing_tools: bool, + + // Fallback musl-root for all targets + pub musl_root: Option, + pub prefix: Option, + pub sysconfdir: Option, + pub datadir: Option, + pub docdir: Option, + pub bindir: PathBuf, + pub libdir: Option, + pub mandir: Option, + pub codegen_tests: bool, + pub nodejs: Option, + pub npm: Option, + pub gdb: Option, + pub python: Option, + pub cargo_native_static: bool, + pub configure_args: Vec, + + // These are either the stage0 downloaded binaries or the locally installed ones. + pub initial_cargo: PathBuf, + pub initial_rustc: PathBuf, + #[cfg(not(test))] + initial_rustfmt: RefCell, + #[cfg(test)] + pub initial_rustfmt: RefCell, + pub out: PathBuf, +} + +#[derive(Default, Deserialize)] +#[cfg_attr(test, derive(Clone))] +pub struct Stage0Metadata { + pub config: Stage0Config, + pub checksums_sha256: HashMap, + pub rustfmt: Option, +} +#[derive(Default, Deserialize)] +#[cfg_attr(test, derive(Clone))] +pub struct Stage0Config { + pub dist_server: String, + pub artifacts_server: String, + pub artifacts_with_llvm_assertions_server: String, + pub git_merge_commit_email: String, + pub nightly_branch: String, +} +#[derive(Default, Deserialize)] +#[cfg_attr(test, derive(Clone))] +pub struct RustfmtMetadata { + pub date: String, + pub version: String, +} + +#[derive(Clone, Debug)] +pub enum RustfmtState { + SystemToolchain(PathBuf), + Downloaded(PathBuf), + Unavailable, + LazyEvaluated, +} + +impl Default for RustfmtState { + fn default() -> Self { + RustfmtState::LazyEvaluated + } +} + +#[derive(Debug, Clone, Copy, PartialEq)] +pub enum LlvmLibunwind { + No, + InTree, + System, +} + +impl Default for LlvmLibunwind { + fn default() -> Self { + Self::No + } +} + +impl FromStr for LlvmLibunwind { + type Err = String; + + fn from_str(value: &str) -> Result { + match value { + "no" => Ok(Self::No), + "in-tree" => Ok(Self::InTree), + "system" => Ok(Self::System), + invalid => Err(format!("Invalid value '{}' for rust.llvm-libunwind config.", invalid)), + } + } +} + +#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)] +pub enum SplitDebuginfo { + Packed, + Unpacked, + Off, +} + +impl Default for SplitDebuginfo { + fn default() -> Self { + SplitDebuginfo::Off + } +} + +impl std::str::FromStr for SplitDebuginfo { + type Err = (); + + fn from_str(s: &str) -> Result { + match s { + "packed" => Ok(SplitDebuginfo::Packed), + "unpacked" => Ok(SplitDebuginfo::Unpacked), + "off" => Ok(SplitDebuginfo::Off), + _ => Err(()), + } + } +} + +impl SplitDebuginfo { + /// Returns the default `-Csplit-debuginfo` value for the current target. See the comment for + /// `rust.split-debuginfo` in `config.toml.example`. + fn default_for_platform(target: &str) -> Self { + if target.contains("apple") { + SplitDebuginfo::Unpacked + } else if target.contains("windows") { + SplitDebuginfo::Packed + } else { + SplitDebuginfo::Off + } + } +} + +#[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)] +pub struct TargetSelection { + pub triple: Interned, + file: Option>, +} + +impl TargetSelection { + pub fn from_user(selection: &str) -> Self { + let path = Path::new(selection); + + let (triple, file) = if path.exists() { + let triple = path + .file_stem() + .expect("Target specification file has no file stem") + .to_str() + .expect("Target specification file stem is not UTF-8"); + + (triple, Some(selection)) + } else { + (selection, None) + }; + + let triple = INTERNER.intern_str(triple); + let file = file.map(|f| INTERNER.intern_str(f)); + + Self { triple, file } + } + + pub fn rustc_target_arg(&self) -> &str { + self.file.as_ref().unwrap_or(&self.triple) + } + + pub fn contains(&self, needle: &str) -> bool { + self.triple.contains(needle) + } + + pub fn starts_with(&self, needle: &str) -> bool { + self.triple.starts_with(needle) + } + + pub fn ends_with(&self, needle: &str) -> bool { + self.triple.ends_with(needle) + } +} + +impl fmt::Display for TargetSelection { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "{}", self.triple)?; + if let Some(file) = self.file { + write!(f, "({})", file)?; + } + Ok(()) + } +} + +impl fmt::Debug for TargetSelection { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "{}", self) + } +} + +impl PartialEq<&str> for TargetSelection { + fn eq(&self, other: &&str) -> bool { + self.triple == *other + } +} + +/// Per-target configuration stored in the global configuration structure. +#[derive(Default)] +#[cfg_attr(test, derive(Clone))] +pub struct Target { + /// Some(path to llvm-config) if using an external LLVM. + pub llvm_config: Option, + /// Some(path to FileCheck) if one was specified. + pub llvm_filecheck: Option, + pub llvm_libunwind: Option, + pub cc: Option, + pub cxx: Option, + pub ar: Option, + pub ranlib: Option, + pub default_linker: Option, + pub linker: Option, + pub ndk: Option, + pub sanitizers: Option, + pub profiler: Option, + pub crt_static: Option, + pub musl_root: Option, + pub musl_libdir: Option, + pub wasi_root: Option, + pub qemu_rootfs: Option, + pub no_std: bool, +} + +impl Target { + pub fn from_triple(triple: &str) -> Self { + let mut target: Self = Default::default(); + if triple.contains("-none") + || triple.contains("nvptx") + || triple.contains("switch") + || triple.contains("-uefi") + { + target.no_std = true; + } + target + } +} +/// Structure of the `config.toml` file that configuration is read from. +/// +/// This structure uses `Decodable` to automatically decode a TOML configuration +/// file into this format, and then this is traversed and written into the above +/// `Config` structure. +#[derive(Deserialize, Default)] +#[serde(deny_unknown_fields, rename_all = "kebab-case")] +struct TomlConfig { + changelog_seen: Option, + build: Option, + install: Option, + llvm: Option, + rust: Option, + target: Option>, + dist: Option, + profile: Option, +} + +trait Merge { + fn merge(&mut self, other: Self); +} + +impl Merge for TomlConfig { + fn merge( + &mut self, + TomlConfig { build, install, llvm, rust, dist, target, profile: _, changelog_seen: _ }: Self, + ) { + fn do_merge(x: &mut Option, y: Option) { + if let Some(new) = y { + if let Some(original) = x { + original.merge(new); + } else { + *x = Some(new); + } + } + } + do_merge(&mut self.build, build); + do_merge(&mut self.install, install); + do_merge(&mut self.llvm, llvm); + do_merge(&mut self.rust, rust); + do_merge(&mut self.dist, dist); + assert!(target.is_none(), "merging target-specific config is not currently supported"); + } +} + +// We are using a decl macro instead of a derive proc macro here to reduce the compile time of +// rustbuild. +macro_rules! define_config { + ($(#[$attr:meta])* struct $name:ident { + $($field:ident: Option<$field_ty:ty> = $field_key:literal,)* + }) => { + $(#[$attr])* + struct $name { + $($field: Option<$field_ty>,)* + } + + impl Merge for $name { + fn merge(&mut self, other: Self) { + $( + if !self.$field.is_some() { + self.$field = other.$field; + } + )* + } + } + + // The following is a trimmed version of what serde_derive generates. All parts not relevant + // for toml deserialization have been removed. This reduces the binary size and improves + // compile time of rustbuild. + impl<'de> Deserialize<'de> for $name { + fn deserialize(deserializer: D) -> Result + where + D: Deserializer<'de>, + { + struct Field; + impl<'de> serde::de::Visitor<'de> for Field { + type Value = $name; + fn expecting(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + f.write_str(concat!("struct ", stringify!($name))) + } + + #[inline] + fn visit_map(self, mut map: A) -> Result + where + A: serde::de::MapAccess<'de>, + { + $(let mut $field: Option<$field_ty> = None;)* + while let Some(key) = + match serde::de::MapAccess::next_key::(&mut map) { + Ok(val) => val, + Err(err) => { + return Err(err); + } + } + { + match &*key { + $($field_key => { + if $field.is_some() { + return Err(::duplicate_field( + $field_key, + )); + } + $field = match serde::de::MapAccess::next_value::<$field_ty>( + &mut map, + ) { + Ok(val) => Some(val), + Err(err) => { + return Err(err); + } + }; + })* + key => { + return Err(serde::de::Error::unknown_field(key, FIELDS)); + } + } + } + Ok($name { $($field),* }) + } + } + const FIELDS: &'static [&'static str] = &[ + $($field_key,)* + ]; + Deserializer::deserialize_struct( + deserializer, + stringify!($name), + FIELDS, + Field, + ) + } + } + } +} + +define_config! { + /// TOML representation of various global build decisions. + #[derive(Default)] + struct Build { + build: Option = "build", + host: Option> = "host", + target: Option> = "target", + build_dir: Option = "build-dir", + cargo: Option = "cargo", + rustc: Option = "rustc", + rustfmt: Option = "rustfmt", + docs: Option = "docs", + compiler_docs: Option = "compiler-docs", + docs_minification: Option = "docs-minification", + submodules: Option = "submodules", + gdb: Option = "gdb", + nodejs: Option = "nodejs", + npm: Option = "npm", + python: Option = "python", + locked_deps: Option = "locked-deps", + vendor: Option = "vendor", + full_bootstrap: Option = "full-bootstrap", + extended: Option = "extended", + tools: Option> = "tools", + verbose: Option = "verbose", + sanitizers: Option = "sanitizers", + profiler: Option = "profiler", + cargo_native_static: Option = "cargo-native-static", + low_priority: Option = "low-priority", + configure_args: Option> = "configure-args", + local_rebuild: Option = "local-rebuild", + print_step_timings: Option = "print-step-timings", + print_step_rusage: Option = "print-step-rusage", + check_stage: Option = "check-stage", + doc_stage: Option = "doc-stage", + build_stage: Option = "build-stage", + test_stage: Option = "test-stage", + install_stage: Option = "install-stage", + dist_stage: Option = "dist-stage", + bench_stage: Option = "bench-stage", + patch_binaries_for_nix: Option = "patch-binaries-for-nix", + metrics: Option = "metrics", + } +} + +define_config! { + /// TOML representation of various global install decisions. + struct Install { + prefix: Option = "prefix", + sysconfdir: Option = "sysconfdir", + docdir: Option = "docdir", + bindir: Option = "bindir", + libdir: Option = "libdir", + mandir: Option = "mandir", + datadir: Option = "datadir", + } +} + +define_config! { + /// TOML representation of how the LLVM build is configured. + struct Llvm { + skip_rebuild: Option = "skip-rebuild", + optimize: Option = "optimize", + thin_lto: Option = "thin-lto", + release_debuginfo: Option = "release-debuginfo", + assertions: Option = "assertions", + tests: Option = "tests", + plugins: Option = "plugins", + ccache: Option = "ccache", + version_check: Option = "version-check", + static_libstdcpp: Option = "static-libstdcpp", + ninja: Option = "ninja", + targets: Option = "targets", + experimental_targets: Option = "experimental-targets", + link_jobs: Option = "link-jobs", + link_shared: Option = "link-shared", + version_suffix: Option = "version-suffix", + clang_cl: Option = "clang-cl", + cflags: Option = "cflags", + cxxflags: Option = "cxxflags", + ldflags: Option = "ldflags", + use_libcxx: Option = "use-libcxx", + use_linker: Option = "use-linker", + allow_old_toolchain: Option = "allow-old-toolchain", + polly: Option = "polly", + clang: Option = "clang", + download_ci_llvm: Option = "download-ci-llvm", + build_config: Option> = "build-config", + } +} + +define_config! { + struct Dist { + sign_folder: Option = "sign-folder", + gpg_password_file: Option = "gpg-password-file", + upload_addr: Option = "upload-addr", + src_tarball: Option = "src-tarball", + missing_tools: Option = "missing-tools", + compression_formats: Option> = "compression-formats", + } +} + +#[derive(Deserialize)] +#[serde(untagged)] +enum StringOrBool { + String(String), + Bool(bool), +} + +impl Default for StringOrBool { + fn default() -> StringOrBool { + StringOrBool::Bool(false) + } +} + +define_config! { + /// TOML representation of how the Rust build is configured. + struct Rust { + optimize: Option = "optimize", + debug: Option = "debug", + codegen_units: Option = "codegen-units", + codegen_units_std: Option = "codegen-units-std", + debug_assertions: Option = "debug-assertions", + debug_assertions_std: Option = "debug-assertions-std", + overflow_checks: Option = "overflow-checks", + overflow_checks_std: Option = "overflow-checks-std", + debug_logging: Option = "debug-logging", + debuginfo_level: Option = "debuginfo-level", + debuginfo_level_rustc: Option = "debuginfo-level-rustc", + debuginfo_level_std: Option = "debuginfo-level-std", + debuginfo_level_tools: Option = "debuginfo-level-tools", + debuginfo_level_tests: Option = "debuginfo-level-tests", + split_debuginfo: Option = "split-debuginfo", + run_dsymutil: Option = "run-dsymutil", + backtrace: Option = "backtrace", + incremental: Option = "incremental", + parallel_compiler: Option = "parallel-compiler", + default_linker: Option = "default-linker", + channel: Option = "channel", + description: Option = "description", + musl_root: Option = "musl-root", + rpath: Option = "rpath", + verbose_tests: Option = "verbose-tests", + optimize_tests: Option = "optimize-tests", + codegen_tests: Option = "codegen-tests", + ignore_git: Option = "ignore-git", + dist_src: Option = "dist-src", + save_toolstates: Option = "save-toolstates", + codegen_backends: Option> = "codegen-backends", + lld: Option = "lld", + use_lld: Option = "use-lld", + llvm_tools: Option = "llvm-tools", + deny_warnings: Option = "deny-warnings", + backtrace_on_ice: Option = "backtrace-on-ice", + verify_llvm_ir: Option = "verify-llvm-ir", + thin_lto_import_instr_limit: Option = "thin-lto-import-instr-limit", + remap_debuginfo: Option = "remap-debuginfo", + jemalloc: Option = "jemalloc", + test_compare_mode: Option = "test-compare-mode", + llvm_libunwind: Option = "llvm-libunwind", + control_flow_guard: Option = "control-flow-guard", + new_symbol_mangling: Option = "new-symbol-mangling", + profile_generate: Option = "profile-generate", + profile_use: Option = "profile-use", + // ignored; this is set from an env var set by bootstrap.py + download_rustc: Option = "download-rustc", + } +} + +define_config! { + /// TOML representation of how each build target is configured. + struct TomlTarget { + cc: Option = "cc", + cxx: Option = "cxx", + ar: Option = "ar", + ranlib: Option = "ranlib", + default_linker: Option = "default-linker", + linker: Option = "linker", + llvm_config: Option = "llvm-config", + llvm_filecheck: Option = "llvm-filecheck", + llvm_libunwind: Option = "llvm-libunwind", + android_ndk: Option = "android-ndk", + sanitizers: Option = "sanitizers", + profiler: Option = "profiler", + crt_static: Option = "crt-static", + musl_root: Option = "musl-root", + musl_libdir: Option = "musl-libdir", + wasi_root: Option = "wasi-root", + qemu_rootfs: Option = "qemu-rootfs", + no_std: Option = "no-std", + } +} + +impl Config { + pub fn default_opts() -> Config { + let mut config = Config::default(); + config.llvm_optimize = true; + config.ninja_in_file = true; + config.llvm_version_check = true; + config.llvm_static_stdcpp = true; + config.backtrace = true; + config.rust_optimize = true; + config.rust_optimize_tests = true; + config.submodules = None; + config.docs = true; + config.docs_minification = true; + config.rust_rpath = true; + config.channel = "dev".to_string(); + config.codegen_tests = true; + config.rust_dist_src = true; + config.rust_codegen_backends = vec![INTERNER.intern_str("llvm")]; + config.deny_warnings = true; + config.bindir = "bin".into(); + + // set by build.rs + config.build = TargetSelection::from_user(&env!("BUILD_TRIPLE")); + let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR")); + // Undo `src/bootstrap` + config.src = manifest_dir.parent().unwrap().parent().unwrap().to_owned(); + config.out = PathBuf::from("build"); + + config.initial_cargo = PathBuf::from(env!("CARGO")); + config.initial_rustc = PathBuf::from(env!("RUSTC")); + + config + } + + pub fn parse(args: &[String]) -> Config { + let flags = Flags::parse(&args); + + let mut config = Config::default_opts(); + config.exclude = flags.exclude.into_iter().map(|path| TaskPath::parse(path)).collect(); + config.include_default_paths = flags.include_default_paths; + config.rustc_error_format = flags.rustc_error_format; + config.json_output = flags.json_output; + config.on_fail = flags.on_fail; + config.jobs = flags.jobs.map(threads_from_config); + config.cmd = flags.cmd; + config.incremental = flags.incremental; + config.dry_run = flags.dry_run; + config.keep_stage = flags.keep_stage; + config.keep_stage_std = flags.keep_stage_std; + config.color = flags.color; + if let Some(value) = flags.deny_warnings { + config.deny_warnings = value; + } + config.llvm_profile_use = flags.llvm_profile_use; + config.llvm_profile_generate = flags.llvm_profile_generate; + + let stage0_json = t!(std::fs::read(&config.src.join("src").join("stage0.json"))); + config.stage0_metadata = t!(serde_json::from_slice::(&stage0_json)); + + #[cfg(test)] + let get_toml = |_| TomlConfig::default(); + #[cfg(not(test))] + let get_toml = |file: &Path| { + let contents = + t!(fs::read_to_string(file), format!("config file {} not found", file.display())); + // Deserialize to Value and then TomlConfig to prevent the Deserialize impl of + // TomlConfig and sub types to be monomorphized 5x by toml. + match toml::from_str(&contents) + .and_then(|table: toml::Value| TomlConfig::deserialize(table)) + { + Ok(table) => table, + Err(err) => { + eprintln!("failed to parse TOML configuration '{}': {}", file.display(), err); + crate::detail_exit(2); + } + } + }; + + // Read from `--config`, then `RUST_BOOTSTRAP_CONFIG`, then `./config.toml`, then `config.toml` in the root directory. + let toml_path = flags + .config + .clone() + .or_else(|| env::var_os("RUST_BOOTSTRAP_CONFIG").map(PathBuf::from)); + let using_default_path = toml_path.is_none(); + let mut toml_path = toml_path.unwrap_or_else(|| PathBuf::from("config.toml")); + if using_default_path && !toml_path.exists() { + toml_path = config.src.join(toml_path); + } + + // Give a hard error if `--config` or `RUST_BOOTSTRAP_CONFIG` are set to a missing path, + // but not if `config.toml` hasn't been created. + let mut toml = if !using_default_path || toml_path.exists() { + get_toml(&toml_path) + } else { + TomlConfig::default() + }; + + if let Some(include) = &toml.profile { + let mut include_path = config.src.clone(); + include_path.push("src"); + include_path.push("bootstrap"); + include_path.push("defaults"); + include_path.push(format!("config.{}.toml", include)); + let included_toml = get_toml(&include_path); + toml.merge(included_toml); + } + + config.changelog_seen = toml.changelog_seen; + config.config = toml_path; + + let build = toml.build.unwrap_or_default(); + + set(&mut config.initial_rustc, build.rustc.map(PathBuf::from)); + set(&mut config.out, flags.build_dir.or_else(|| build.build_dir.map(PathBuf::from))); + // NOTE: Bootstrap spawns various commands with different working directories. + // To avoid writing to random places on the file system, `config.out` needs to be an absolute path. + if !config.out.is_absolute() { + // `canonicalize` requires the path to already exist. Use our vendored copy of `absolute` instead. + config.out = crate::util::absolute(&config.out); + } + + if config.dry_run { + let dir = config.out.join("tmp-dry-run"); + t!(fs::create_dir_all(&dir)); + config.out = dir; + } + + config.hosts = if let Some(arg_host) = flags.host { + arg_host + } else if let Some(file_host) = build.host { + file_host.iter().map(|h| TargetSelection::from_user(h)).collect() + } else { + vec![config.build] + }; + config.targets = if let Some(arg_target) = flags.target { + arg_target + } else if let Some(file_target) = build.target { + file_target.iter().map(|h| TargetSelection::from_user(h)).collect() + } else { + // If target is *not* configured, then default to the host + // toolchains. + config.hosts.clone() + }; + + config.nodejs = build.nodejs.map(PathBuf::from); + config.npm = build.npm.map(PathBuf::from); + config.gdb = build.gdb.map(PathBuf::from); + config.python = build.python.map(PathBuf::from); + config.submodules = build.submodules; + set(&mut config.low_priority, build.low_priority); + set(&mut config.compiler_docs, build.compiler_docs); + set(&mut config.docs_minification, build.docs_minification); + set(&mut config.docs, build.docs); + set(&mut config.locked_deps, build.locked_deps); + set(&mut config.vendor, build.vendor); + set(&mut config.full_bootstrap, build.full_bootstrap); + set(&mut config.extended, build.extended); + config.tools = build.tools; + set(&mut config.verbose, build.verbose); + set(&mut config.sanitizers, build.sanitizers); + set(&mut config.profiler, build.profiler); + set(&mut config.cargo_native_static, build.cargo_native_static); + set(&mut config.configure_args, build.configure_args); + set(&mut config.local_rebuild, build.local_rebuild); + set(&mut config.print_step_timings, build.print_step_timings); + set(&mut config.print_step_rusage, build.print_step_rusage); + set(&mut config.patch_binaries_for_nix, build.patch_binaries_for_nix); + + config.verbose = cmp::max(config.verbose, flags.verbose); + + if let Some(install) = toml.install { + config.prefix = install.prefix.map(PathBuf::from); + config.sysconfdir = install.sysconfdir.map(PathBuf::from); + config.datadir = install.datadir.map(PathBuf::from); + config.docdir = install.docdir.map(PathBuf::from); + set(&mut config.bindir, install.bindir.map(PathBuf::from)); + config.libdir = install.libdir.map(PathBuf::from); + config.mandir = install.mandir.map(PathBuf::from); + } + + // We want the llvm-skip-rebuild flag to take precedence over the + // skip-rebuild config.toml option so we store it separately + // so that we can infer the right value + let mut llvm_skip_rebuild = flags.llvm_skip_rebuild; + + // Store off these values as options because if they're not provided + // we'll infer default values for them later + let mut llvm_assertions = None; + let mut llvm_tests = None; + let mut llvm_plugins = None; + let mut debug = None; + let mut debug_assertions = None; + let mut debug_assertions_std = None; + let mut overflow_checks = None; + let mut overflow_checks_std = None; + let mut debug_logging = None; + let mut debuginfo_level = None; + let mut debuginfo_level_rustc = None; + let mut debuginfo_level_std = None; + let mut debuginfo_level_tools = None; + let mut debuginfo_level_tests = None; + let mut optimize = None; + let mut ignore_git = None; + + if let Some(llvm) = toml.llvm { + match llvm.ccache { + Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()), + Some(StringOrBool::Bool(true)) => { + config.ccache = Some("ccache".to_string()); + } + Some(StringOrBool::Bool(false)) | None => {} + } + set(&mut config.ninja_in_file, llvm.ninja); + llvm_assertions = llvm.assertions; + llvm_tests = llvm.tests; + llvm_plugins = llvm.plugins; + llvm_skip_rebuild = llvm_skip_rebuild.or(llvm.skip_rebuild); + set(&mut config.llvm_optimize, llvm.optimize); + set(&mut config.llvm_thin_lto, llvm.thin_lto); + set(&mut config.llvm_release_debuginfo, llvm.release_debuginfo); + set(&mut config.llvm_version_check, llvm.version_check); + set(&mut config.llvm_static_stdcpp, llvm.static_libstdcpp); + if let Some(v) = llvm.link_shared { + config.llvm_link_shared.set(Some(v)); + } + config.llvm_targets = llvm.targets.clone(); + config.llvm_experimental_targets = llvm.experimental_targets.clone(); + config.llvm_link_jobs = llvm.link_jobs; + config.llvm_version_suffix = llvm.version_suffix.clone(); + config.llvm_clang_cl = llvm.clang_cl.clone(); + + config.llvm_cflags = llvm.cflags.clone(); + config.llvm_cxxflags = llvm.cxxflags.clone(); + config.llvm_ldflags = llvm.ldflags.clone(); + set(&mut config.llvm_use_libcxx, llvm.use_libcxx); + config.llvm_use_linker = llvm.use_linker.clone(); + config.llvm_allow_old_toolchain = llvm.allow_old_toolchain.unwrap_or(false); + config.llvm_polly = llvm.polly.unwrap_or(false); + config.llvm_clang = llvm.clang.unwrap_or(false); + config.llvm_build_config = llvm.build_config.clone().unwrap_or(Default::default()); + 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 + // FIXME: this is duplicated in bootstrap.py + 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) + } + Some(StringOrBool::Bool(b)) => b, + None => false, + }; + + if config.llvm_from_ci { + // None of the LLVM options, except assertions, are supported + // when using downloaded LLVM. We could just ignore these but + // that's potentially confusing, so force them to not be + // explicitly set. The defaults and CI defaults don't + // necessarily match but forcing people to match (somewhat + // arbitrary) CI configuration locally seems bad/hard. + check_ci_llvm!(llvm.optimize); + check_ci_llvm!(llvm.thin_lto); + check_ci_llvm!(llvm.release_debuginfo); + // CI-built LLVM can be either dynamic or static. We won't know until we download it. + check_ci_llvm!(llvm.link_shared); + check_ci_llvm!(llvm.static_libstdcpp); + check_ci_llvm!(llvm.targets); + check_ci_llvm!(llvm.experimental_targets); + check_ci_llvm!(llvm.link_jobs); + check_ci_llvm!(llvm.clang_cl); + check_ci_llvm!(llvm.version_suffix); + check_ci_llvm!(llvm.cflags); + check_ci_llvm!(llvm.cxxflags); + check_ci_llvm!(llvm.ldflags); + check_ci_llvm!(llvm.use_libcxx); + check_ci_llvm!(llvm.use_linker); + check_ci_llvm!(llvm.allow_old_toolchain); + check_ci_llvm!(llvm.polly); + check_ci_llvm!(llvm.clang); + check_ci_llvm!(llvm.build_config); + check_ci_llvm!(llvm.plugins); + } + + // NOTE: can never be hit when downloading from CI, since we call `check_ci_llvm!(thin_lto)` above. + if config.llvm_thin_lto && llvm.link_shared.is_none() { + // If we're building with ThinLTO on, by default we want to link + // to LLVM shared, to avoid re-doing ThinLTO (which happens in + // the link step) with each stage. + config.llvm_link_shared.set(Some(true)); + } + } + + if let Some(rust) = toml.rust { + debug = rust.debug; + debug_assertions = rust.debug_assertions; + debug_assertions_std = rust.debug_assertions_std; + overflow_checks = rust.overflow_checks; + overflow_checks_std = rust.overflow_checks_std; + debug_logging = rust.debug_logging; + debuginfo_level = rust.debuginfo_level; + debuginfo_level_rustc = rust.debuginfo_level_rustc; + debuginfo_level_std = rust.debuginfo_level_std; + debuginfo_level_tools = rust.debuginfo_level_tools; + debuginfo_level_tests = rust.debuginfo_level_tests; + config.rust_split_debuginfo = rust + .split_debuginfo + .as_deref() + .map(SplitDebuginfo::from_str) + .map(|v| v.expect("invalid value for rust.split_debuginfo")) + .unwrap_or(SplitDebuginfo::default_for_platform(&config.build.triple)); + optimize = rust.optimize; + ignore_git = rust.ignore_git; + config.rust_new_symbol_mangling = rust.new_symbol_mangling; + set(&mut config.rust_optimize_tests, rust.optimize_tests); + set(&mut config.codegen_tests, rust.codegen_tests); + set(&mut config.rust_rpath, rust.rpath); + set(&mut config.jemalloc, rust.jemalloc); + set(&mut config.test_compare_mode, rust.test_compare_mode); + set(&mut config.backtrace, rust.backtrace); + set(&mut config.channel, rust.channel); + config.description = rust.description; + set(&mut config.rust_dist_src, rust.dist_src); + set(&mut config.verbose_tests, rust.verbose_tests); + // in the case "false" is set explicitly, do not overwrite the command line args + if let Some(true) = rust.incremental { + config.incremental = true; + } + set(&mut config.use_lld, rust.use_lld); + set(&mut config.lld_enabled, rust.lld); + set(&mut config.llvm_tools_enabled, rust.llvm_tools); + config.rustc_parallel = rust.parallel_compiler.unwrap_or(false); + config.rustc_default_linker = rust.default_linker; + config.musl_root = rust.musl_root.map(PathBuf::from); + config.save_toolstates = rust.save_toolstates.map(PathBuf::from); + set(&mut config.deny_warnings, flags.deny_warnings.or(rust.deny_warnings)); + set(&mut config.backtrace_on_ice, rust.backtrace_on_ice); + set(&mut config.rust_verify_llvm_ir, rust.verify_llvm_ir); + config.rust_thin_lto_import_instr_limit = rust.thin_lto_import_instr_limit; + set(&mut config.rust_remap_debuginfo, rust.remap_debuginfo); + set(&mut config.control_flow_guard, rust.control_flow_guard); + config.llvm_libunwind_default = rust + .llvm_libunwind + .map(|v| v.parse().expect("failed to parse rust.llvm-libunwind")); + + if let Some(ref backends) = rust.codegen_backends { + config.rust_codegen_backends = + backends.iter().map(|s| INTERNER.intern_str(s)).collect(); + } + + config.rust_codegen_units = rust.codegen_units.map(threads_from_config); + config.rust_codegen_units_std = rust.codegen_units_std.map(threads_from_config); + config.rust_profile_use = flags.rust_profile_use.or(rust.profile_use); + config.rust_profile_generate = flags.rust_profile_generate.or(rust.profile_generate); + config.download_rustc_commit = download_ci_rustc_commit(&config, rust.download_rustc); + } else { + config.rust_profile_use = flags.rust_profile_use; + config.rust_profile_generate = flags.rust_profile_generate; + } + + if let Some(t) = toml.target { + for (triple, cfg) in t { + let mut target = Target::from_triple(&triple); + + if let Some(ref s) = cfg.llvm_config { + target.llvm_config = Some(config.src.join(s)); + } + if let Some(ref s) = cfg.llvm_filecheck { + target.llvm_filecheck = Some(config.src.join(s)); + } + target.llvm_libunwind = cfg + .llvm_libunwind + .as_ref() + .map(|v| v.parse().expect("failed to parse rust.llvm-libunwind")); + if let Some(ref s) = cfg.android_ndk { + target.ndk = Some(config.src.join(s)); + } + if let Some(s) = cfg.no_std { + target.no_std = s; + } + target.cc = cfg.cc.map(PathBuf::from); + target.cxx = cfg.cxx.map(PathBuf::from); + target.ar = cfg.ar.map(PathBuf::from); + target.ranlib = cfg.ranlib.map(PathBuf::from); + target.linker = cfg.linker.map(PathBuf::from); + target.crt_static = cfg.crt_static; + target.musl_root = cfg.musl_root.map(PathBuf::from); + target.musl_libdir = cfg.musl_libdir.map(PathBuf::from); + target.wasi_root = cfg.wasi_root.map(PathBuf::from); + target.qemu_rootfs = cfg.qemu_rootfs.map(PathBuf::from); + target.sanitizers = cfg.sanitizers; + target.profiler = cfg.profiler; + + config.target_config.insert(TargetSelection::from_user(&triple), target); + } + } + + if config.llvm_from_ci { + let triple = &config.build.triple; + let mut build_target = config + .target_config + .entry(config.build) + .or_insert_with(|| Target::from_triple(&triple)); + + check_ci_llvm!(build_target.llvm_config); + check_ci_llvm!(build_target.llvm_filecheck); + let ci_llvm_bin = config.out.join(&*config.build.triple).join("ci-llvm/bin"); + build_target.llvm_config = Some(ci_llvm_bin.join(exe("llvm-config", config.build))); + build_target.llvm_filecheck = Some(ci_llvm_bin.join(exe("FileCheck", config.build))); + } + + if let Some(t) = toml.dist { + config.dist_sign_folder = t.sign_folder.map(PathBuf::from); + config.dist_upload_addr = t.upload_addr; + config.dist_compression_formats = t.compression_formats; + set(&mut config.rust_dist_src, t.src_tarball); + set(&mut config.missing_tools, t.missing_tools); + } + + if let Some(r) = build.rustfmt { + *config.initial_rustfmt.borrow_mut() = if r.exists() { + RustfmtState::SystemToolchain(r) + } else { + RustfmtState::Unavailable + }; + } else { + // If using a system toolchain for bootstrapping, see if that has rustfmt available. + let host = config.build; + let rustfmt_path = config.initial_rustc.with_file_name(exe("rustfmt", host)); + let bin_root = config.out.join(host.triple).join("stage0"); + if !rustfmt_path.starts_with(&bin_root) { + // Using a system-provided toolchain; we shouldn't download rustfmt. + *config.initial_rustfmt.borrow_mut() = RustfmtState::SystemToolchain(rustfmt_path); + } + } + + // Now that we've reached the end of our configuration, infer the + // default values for all options that we haven't otherwise stored yet. + + config.llvm_skip_rebuild = llvm_skip_rebuild.unwrap_or(false); + config.llvm_assertions = llvm_assertions.unwrap_or(false); + config.llvm_tests = llvm_tests.unwrap_or(false); + config.llvm_plugins = llvm_plugins.unwrap_or(false); + config.rust_optimize = optimize.unwrap_or(true); + + let default = debug == Some(true); + config.rust_debug_assertions = debug_assertions.unwrap_or(default); + config.rust_debug_assertions_std = + debug_assertions_std.unwrap_or(config.rust_debug_assertions); + config.rust_overflow_checks = overflow_checks.unwrap_or(default); + config.rust_overflow_checks_std = + overflow_checks_std.unwrap_or(config.rust_overflow_checks); + + config.rust_debug_logging = debug_logging.unwrap_or(config.rust_debug_assertions); + + let with_defaults = |debuginfo_level_specific: Option| { + debuginfo_level_specific.or(debuginfo_level).unwrap_or(if debug == Some(true) { + 1 + } else { + 0 + }) + }; + config.rust_debuginfo_level_rustc = with_defaults(debuginfo_level_rustc); + config.rust_debuginfo_level_std = with_defaults(debuginfo_level_std); + config.rust_debuginfo_level_tools = with_defaults(debuginfo_level_tools); + config.rust_debuginfo_level_tests = debuginfo_level_tests.unwrap_or(0); + + let default = config.channel == "dev"; + config.ignore_git = ignore_git.unwrap_or(default); + + let download_rustc = config.download_rustc_commit.is_some(); + // See https://github.com/rust-lang/compiler-team/issues/326 + config.stage = match config.cmd { + Subcommand::Check { .. } => flags.stage.or(build.check_stage).unwrap_or(0), + // `download-rustc` only has a speed-up for stage2 builds. Default to stage2 unless explicitly overridden. + Subcommand::Doc { .. } => { + flags.stage.or(build.doc_stage).unwrap_or(if download_rustc { 2 } else { 0 }) + } + Subcommand::Build { .. } => { + flags.stage.or(build.build_stage).unwrap_or(if download_rustc { 2 } else { 1 }) + } + Subcommand::Test { .. } => { + flags.stage.or(build.test_stage).unwrap_or(if download_rustc { 2 } else { 1 }) + } + Subcommand::Bench { .. } => flags.stage.or(build.bench_stage).unwrap_or(2), + Subcommand::Dist { .. } => flags.stage.or(build.dist_stage).unwrap_or(2), + Subcommand::Install { .. } => flags.stage.or(build.install_stage).unwrap_or(2), + // These are all bootstrap tools, which don't depend on the compiler. + // The stage we pass shouldn't matter, but use 0 just in case. + Subcommand::Clean { .. } + | Subcommand::Clippy { .. } + | Subcommand::Fix { .. } + | Subcommand::Run { .. } + | Subcommand::Setup { .. } + | Subcommand::Format { .. } => flags.stage.unwrap_or(0), + }; + + // CI should always run stage 2 builds, unless it specifically states otherwise + #[cfg(not(test))] + if flags.stage.is_none() && crate::CiEnv::current() != crate::CiEnv::None { + match config.cmd { + Subcommand::Test { .. } + | Subcommand::Doc { .. } + | Subcommand::Build { .. } + | Subcommand::Bench { .. } + | Subcommand::Dist { .. } + | Subcommand::Install { .. } => { + assert_eq!( + config.stage, 2, + "x.py should be run with `--stage 2` on CI, but was run with `--stage {}`", + config.stage, + ); + } + Subcommand::Clean { .. } + | Subcommand::Check { .. } + | Subcommand::Clippy { .. } + | Subcommand::Fix { .. } + | Subcommand::Run { .. } + | Subcommand::Setup { .. } + | Subcommand::Format { .. } => {} + } + } + + config + } + + /// A git invocation which runs inside the source directory. + /// + /// Use this rather than `Command::new("git")` in order to support out-of-tree builds. + pub(crate) fn git(&self) -> Command { + let mut git = Command::new("git"); + git.current_dir(&self.src); + git + } + + pub(crate) fn artifact_channel(&self, commit: &str) -> String { + let mut channel = self.git(); + channel.arg("show").arg(format!("{}:src/ci/channel", commit)); + let channel = output(&mut channel); + channel.trim().to_owned() + } + + /// Try to find the relative path of `bindir`, otherwise return it in full. + pub fn bindir_relative(&self) -> &Path { + let bindir = &self.bindir; + if bindir.is_absolute() { + // Try to make it relative to the prefix. + if let Some(prefix) = &self.prefix { + if let Ok(stripped) = bindir.strip_prefix(prefix) { + return stripped; + } + } + } + bindir + } + + /// Try to find the relative path of `libdir`. + pub fn libdir_relative(&self) -> Option<&Path> { + let libdir = self.libdir.as_ref()?; + if libdir.is_relative() { + Some(libdir) + } else { + // Try to make it relative to the prefix. + libdir.strip_prefix(self.prefix.as_ref()?).ok() + } + } + + /// The absolute path to the downloaded LLVM artifacts. + pub(crate) fn ci_llvm_root(&self) -> PathBuf { + assert!(self.llvm_from_ci); + self.out.join(&*self.build.triple).join("ci-llvm") + } + + /// Determine whether llvm should be linked dynamically. + /// + /// If `false`, llvm should be linked statically. + /// This is computed on demand since LLVM might have to first be downloaded from CI. + pub(crate) fn llvm_link_shared(builder: &Builder<'_>) -> bool { + let mut opt = builder.config.llvm_link_shared.get(); + if opt.is_none() && builder.config.dry_run { + // just assume static for now - dynamic linking isn't supported on all platforms + return false; + } + + let llvm_link_shared = *opt.get_or_insert_with(|| { + if builder.config.llvm_from_ci { + crate::native::maybe_download_ci_llvm(builder); + let ci_llvm = builder.config.ci_llvm_root(); + let link_type = t!( + std::fs::read_to_string(ci_llvm.join("link-type.txt")), + format!("CI llvm missing: {}", ci_llvm.display()) + ); + link_type == "dynamic" + } else { + // unclear how thought-through this default is, but it maintains compatibility with + // previous behavior + false + } + }); + builder.config.llvm_link_shared.set(opt); + llvm_link_shared + } + + /// Return whether we will use a downloaded, pre-compiled version of rustc, or just build from source. + pub(crate) fn download_rustc(builder: &Builder<'_>) -> bool { + static DOWNLOAD_RUSTC: OnceCell = OnceCell::new(); + if builder.config.dry_run && DOWNLOAD_RUSTC.get().is_none() { + // avoid trying to actually download the commit + return false; + } + + *DOWNLOAD_RUSTC.get_or_init(|| match &builder.config.download_rustc_commit { + None => false, + Some(commit) => { + download_ci_rustc(builder, commit); + true + } + }) + } + + pub(crate) fn initial_rustfmt(builder: &Builder<'_>) -> Option { + match &mut *builder.config.initial_rustfmt.borrow_mut() { + RustfmtState::SystemToolchain(p) | RustfmtState::Downloaded(p) => Some(p.clone()), + RustfmtState::Unavailable => None, + r @ RustfmtState::LazyEvaluated => { + if builder.config.dry_run { + return Some(PathBuf::new()); + } + let path = maybe_download_rustfmt(builder); + *r = if let Some(p) = &path { + RustfmtState::Downloaded(p.clone()) + } else { + RustfmtState::Unavailable + }; + path + } + } + } + + pub fn verbose(&self) -> bool { + self.verbose > 0 + } + + pub fn sanitizers_enabled(&self, target: TargetSelection) -> bool { + self.target_config.get(&target).map(|t| t.sanitizers).flatten().unwrap_or(self.sanitizers) + } + + pub fn any_sanitizers_enabled(&self) -> bool { + self.target_config.values().any(|t| t.sanitizers == Some(true)) || self.sanitizers + } + + pub fn profiler_enabled(&self, target: TargetSelection) -> bool { + self.target_config.get(&target).map(|t| t.profiler).flatten().unwrap_or(self.profiler) + } + + pub fn any_profiler_enabled(&self) -> bool { + self.target_config.values().any(|t| t.profiler == Some(true)) || self.profiler + } + + pub fn llvm_enabled(&self) -> bool { + self.rust_codegen_backends.contains(&INTERNER.intern_str("llvm")) + } + + pub fn llvm_libunwind(&self, target: TargetSelection) -> LlvmLibunwind { + self.target_config + .get(&target) + .and_then(|t| t.llvm_libunwind) + .or(self.llvm_libunwind_default) + .unwrap_or(LlvmLibunwind::No) + } + + pub fn submodules(&self, rust_info: &GitInfo) -> bool { + self.submodules.unwrap_or(rust_info.is_git()) + } +} + +fn set(field: &mut T, val: Option) { + if let Some(v) = val { + *field = v; + } +} + +fn threads_from_config(v: u32) -> u32 { + match v { + 0 => num_cpus::get() as u32, + n => n, + } +} + +/// Returns the commit to download, or `None` if we shouldn't download CI artifacts. +fn download_ci_rustc_commit( + config: &Config, + download_rustc: Option, +) -> Option { + // If `download-rustc` is not set, default to rebuilding. + let if_unchanged = match download_rustc { + None | Some(StringOrBool::Bool(false)) => return None, + Some(StringOrBool::Bool(true)) => false, + Some(StringOrBool::String(s)) if s == "if-unchanged" => true, + Some(StringOrBool::String(other)) => { + panic!("unrecognized option for download-rustc: {}", other) + } + }; + + // Handle running from a directory other than the top level + let top_level = output(config.git().args(&["rev-parse", "--show-toplevel"])); + let top_level = top_level.trim_end(); + let compiler = format!("{top_level}/compiler/"); + let library = format!("{top_level}/library/"); + + // Look for a version to compare to based on the current commit. + // Only commits merged by bors will have CI artifacts. + let merge_base = output( + config + .git() + .arg("rev-list") + .arg(format!("--author={}", config.stage0_metadata.config.git_merge_commit_email)) + .args(&["-n1", "--first-parent", "HEAD"]), + ); + let commit = merge_base.trim_end(); + if commit.is_empty() { + println!("error: could not find commit hash for downloading rustc"); + println!("help: maybe your repository history is too shallow?"); + println!("help: consider disabling `download-rustc`"); + println!("help: or fetch enough history to include one upstream commit"); + crate::detail_exit(1); + } + + // Warn if there were changes to the compiler or standard library since the ancestor commit. + let has_changes = !t!(config + .git() + .args(&["diff-index", "--quiet", &commit, "--", &compiler, &library]) + .status()) + .success(); + if has_changes { + if if_unchanged { + if config.verbose > 0 { + println!( + "warning: saw changes to compiler/ or library/ since {commit}; \ + ignoring `download-rustc`" + ); + } + return None; + } + println!( + "warning: `download-rustc` is enabled, but there are changes to \ + compiler/ or library/" + ); + } + + Some(commit.to_string()) +} + +fn maybe_download_rustfmt(builder: &Builder<'_>) -> Option { + let RustfmtMetadata { date, version } = builder.config.stage0_metadata.rustfmt.as_ref()?; + let channel = format!("{version}-{date}"); + + let host = builder.config.build; + let rustfmt_path = builder.config.initial_rustc.with_file_name(exe("rustfmt", host)); + let bin_root = builder.config.out.join(host.triple).join("stage0"); + let rustfmt_stamp = bin_root.join(".rustfmt-stamp"); + if rustfmt_path.exists() && !program_out_of_date(&rustfmt_stamp, &channel) { + return Some(rustfmt_path); + } + + let filename = format!("rustfmt-{version}-{build}.tar.xz", build = host.triple); + download_component(builder, DownloadSource::Dist, filename, "rustfmt-preview", &date, "stage0"); + + builder.fix_bin_or_dylib(&bin_root.join("bin").join("rustfmt")); + builder.fix_bin_or_dylib(&bin_root.join("bin").join("cargo-fmt")); + + builder.create(&rustfmt_stamp, &channel); + Some(rustfmt_path) +} + +fn download_ci_rustc(builder: &Builder<'_>, commit: &str) { + builder.verbose(&format!("using downloaded stage2 artifacts from CI (commit {commit})")); + let channel = builder.config.artifact_channel(commit); + let host = builder.config.build.triple; + let bin_root = builder.out.join(host).join("ci-rustc"); + let rustc_stamp = bin_root.join(".rustc-stamp"); + + if !bin_root.join("bin").join("rustc").exists() || program_out_of_date(&rustc_stamp, commit) { + if bin_root.exists() { + t!(fs::remove_dir_all(&bin_root)); + } + let filename = format!("rust-std-{channel}-{host}.tar.xz"); + let pattern = format!("rust-std-{host}"); + download_ci_component(builder, filename, &pattern, commit); + let filename = format!("rustc-{channel}-{host}.tar.xz"); + download_ci_component(builder, filename, "rustc", commit); + // download-rustc doesn't need its own cargo, it can just use beta's. + let filename = format!("rustc-dev-{channel}-{host}.tar.xz"); + download_ci_component(builder, filename, "rustc-dev", commit); + + builder.fix_bin_or_dylib(&bin_root.join("bin").join("rustc")); + builder.fix_bin_or_dylib(&bin_root.join("bin").join("rustdoc")); + let lib_dir = bin_root.join("lib"); + for lib in t!(fs::read_dir(&lib_dir), lib_dir.display().to_string()) { + let lib = t!(lib); + if lib.path().extension() == Some(OsStr::new("so")) { + builder.fix_bin_or_dylib(&lib.path()); + } + } + t!(fs::write(rustc_stamp, commit)); + } +} + +pub(crate) enum DownloadSource { + CI, + Dist, +} + +/// Download a single component of a CI-built toolchain (not necessarily a published nightly). +// NOTE: intentionally takes an owned string to avoid downloading multiple times by accident +fn download_ci_component(builder: &Builder<'_>, filename: String, prefix: &str, commit: &str) { + download_component(builder, DownloadSource::CI, filename, prefix, commit, "ci-rustc") +} + +fn download_component( + builder: &Builder<'_>, + mode: DownloadSource, + filename: String, + prefix: &str, + key: &str, + destination: &str, +) { + let cache_dst = builder.out.join("cache"); + let cache_dir = cache_dst.join(key); + if !cache_dir.exists() { + t!(fs::create_dir_all(&cache_dir)); + } + + let bin_root = builder.out.join(builder.config.build.triple).join(destination); + let tarball = cache_dir.join(&filename); + let (base_url, url, should_verify) = match mode { + DownloadSource::CI => ( + builder.config.stage0_metadata.config.artifacts_server.clone(), + format!("{key}/{filename}"), + false, + ), + DownloadSource::Dist => { + let dist_server = env::var("RUSTUP_DIST_SERVER") + .unwrap_or(builder.config.stage0_metadata.config.dist_server.to_string()); + // NOTE: make `dist` part of the URL because that's how it's stored in src/stage0.json + (dist_server, format!("dist/{key}/{filename}"), true) + } + }; + + // For the beta compiler, put special effort into ensuring the checksums are valid. + // FIXME: maybe we should do this for download-rustc as well? but it would be a pain to update + // this on each and every nightly ... + let checksum = if should_verify { + let error = format!( + "src/stage0.json doesn't contain a checksum for {url}. \ + Pre-built artifacts might not be available for this \ + target at this time, see https://doc.rust-lang.org/nightly\ + /rustc/platform-support.html for more information." + ); + let sha256 = builder.config.stage0_metadata.checksums_sha256.get(&url).expect(&error); + if tarball.exists() { + if builder.verify(&tarball, sha256) { + builder.unpack(&tarball, &bin_root, prefix); + return; + } else { + builder.verbose(&format!( + "ignoring cached file {} due to failed verification", + tarball.display() + )); + builder.remove(&tarball); + } + } + Some(sha256) + } else if tarball.exists() { + builder.unpack(&tarball, &bin_root, prefix); + return; + } else { + None + }; + + builder.download_component(&format!("{base_url}/{url}"), &tarball, ""); + if let Some(sha256) = checksum { + if !builder.verify(&tarball, sha256) { + panic!("failed to verify {}", tarball.display()); + } + } + + builder.unpack(&tarball, &bin_root, prefix); +} -- cgit v1.2.3