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doc.rs
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//! Documentation generation for rustbuilder.
//!
//! This module implements generation for all bits and pieces of documentation
//! for the Rust project. This notably includes suites like the rust book, the
//! nomicon, rust by example, standalone documentation, etc.
//!
//! Everything here is basically just a shim around calling either `rustbook` or
//! `rustdoc`.
use std::collections::HashSet;
use std::fs;
use std::io;
use std::path::{Path, PathBuf};
use crate::Mode;
use build_helper::{t, up_to_date};
use crate::builder::{Builder, Compiler, RunConfig, ShouldRun, Step};
use crate::cache::{Interned, INTERNER};
use crate::compile;
use crate::config::{Config, TargetSelection};
use crate::tool::{self, prepare_tool_cargo, SourceType, Tool};
use crate::util::symlink_dir;
macro_rules! submodule_helper {
($path:expr, submodule) => {
$path
};
($path:expr, submodule = $submodule:literal) => {
$submodule
};
}
macro_rules! book {
($($name:ident, $path:expr, $book_name:expr $(, submodule $(= $submodule:literal)? )? ;)+) => {
$(
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct $name {
target: TargetSelection,
}
impl Step for $name {
type Output = ();
const DEFAULT: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
let builder = run.builder;
run.path($path).default_condition(builder.config.docs)
}
fn make_run(run: RunConfig<'_>) {
run.builder.ensure($name {
target: run.target,
});
}
fn run(self, builder: &Builder<'_>) {
$(
let path = Path::new(submodule_helper!( $path, submodule $( = $submodule )? ));
builder.update_submodule(&path);
)?
builder.ensure(RustbookSrc {
target: self.target,
name: INTERNER.intern_str($book_name),
src: INTERNER.intern_path(builder.src.join($path)),
})
}
}
)+
}
}
// NOTE: When adding a book here, make sure to ALSO build the book by
// adding a build step in `src/bootstrap/builder.rs`!
// NOTE: Make sure to add the corresponding submodule when adding a new book.
// FIXME: Make checking for a submodule automatic somehow (maybe by having a list of all submodules
// and checking against it?).
book!(
CargoBook, "src/tools/cargo/src/doc", "cargo", submodule = "src/tools/cargo";
EditionGuide, "src/doc/edition-guide", "edition-guide", submodule;
EmbeddedBook, "src/doc/embedded-book", "embedded-book", submodule;
Nomicon, "src/doc/nomicon", "nomicon", submodule;
Reference, "src/doc/reference", "reference", submodule;
RustByExample, "src/doc/rust-by-example", "rust-by-example", submodule;
RustdocBook, "src/doc/rustdoc", "rustdoc";
);
fn open(builder: &Builder<'_>, path: impl AsRef<Path>) {
if builder.config.dry_run || !builder.config.cmd.open() {
return;
}
let path = path.as_ref();
builder.info(&format!("Opening doc {}", path.display()));
if let Err(err) = opener::open(path) {
builder.info(&format!("{}\n", err));
}
}
// "library/std" -> ["library", "std"]
//
// Used for deciding whether a particular step is one requested by the user on
// the `x.py doc` command line, which determines whether `--open` will open that
// page.
pub(crate) fn components_simplified(path: &PathBuf) -> Vec<&str> {
path.iter().map(|component| component.to_str().unwrap_or("???")).collect()
}
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct UnstableBook {
target: TargetSelection,
}
impl Step for UnstableBook {
type Output = ();
const DEFAULT: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
let builder = run.builder;
run.path("src/doc/unstable-book").default_condition(builder.config.docs)
}
fn make_run(run: RunConfig<'_>) {
run.builder.ensure(UnstableBook { target: run.target });
}
fn run(self, builder: &Builder<'_>) {
builder.ensure(UnstableBookGen { target: self.target });
builder.ensure(RustbookSrc {
target: self.target,
name: INTERNER.intern_str("unstable-book"),
src: INTERNER.intern_path(builder.md_doc_out(self.target).join("unstable-book")),
})
}
}
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
struct RustbookSrc {
target: TargetSelection,
name: Interned<String>,
src: Interned<PathBuf>,
}
impl Step for RustbookSrc {
type Output = ();
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
run.never()
}
/// Invoke `rustbook` for `target` for the doc book `name` from the `src` path.
///
/// This will not actually generate any documentation if the documentation has
/// already been generated.
fn run(self, builder: &Builder<'_>) {
let target = self.target;
let name = self.name;
let src = self.src;
let out = builder.doc_out(target);
t!(fs::create_dir_all(&out));
let out = out.join(name);
let index = out.join("index.html");
let rustbook = builder.tool_exe(Tool::Rustbook);
let mut rustbook_cmd = builder.tool_cmd(Tool::Rustbook);
if builder.config.dry_run || up_to_date(&src, &index) && up_to_date(&rustbook, &index) {
return;
}
builder.info(&format!("Rustbook ({}) - {}", target, name));
let _ = fs::remove_dir_all(&out);
builder.run(rustbook_cmd.arg("build").arg(&src).arg("-d").arg(out));
}
}
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct TheBook {
compiler: Compiler,
target: TargetSelection,
}
impl Step for TheBook {
type Output = ();
const DEFAULT: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
let builder = run.builder;
run.path("src/doc/book").default_condition(builder.config.docs)
}
fn make_run(run: RunConfig<'_>) {
run.builder.ensure(TheBook {
compiler: run.builder.compiler(run.builder.top_stage, run.builder.config.build),
target: run.target,
});
}
/// Builds the book and associated stuff.
///
/// We need to build:
///
/// * Book
/// * Older edition redirects
/// * Version info and CSS
/// * Index page
/// * Redirect pages
fn run(self, builder: &Builder<'_>) {
let relative_path = Path::new("src").join("doc").join("book");
builder.update_submodule(&relative_path);
let compiler = self.compiler;
let target = self.target;
// build book
builder.ensure(RustbookSrc {
target,
name: INTERNER.intern_str("book"),
src: INTERNER.intern_path(builder.src.join(&relative_path)),
});
// building older edition redirects
for edition in &["first-edition", "second-edition", "2018-edition"] {
builder.ensure(RustbookSrc {
target,
name: INTERNER.intern_string(format!("book/{}", edition)),
src: INTERNER.intern_path(builder.src.join(&relative_path).join(edition)),
});
}
// build the version info page and CSS
builder.ensure(Standalone { compiler, target });
// build the redirect pages
builder.info(&format!("Documenting book redirect pages ({})", target));
for file in t!(fs::read_dir(builder.src.join(&relative_path).join("redirects"))) {
let file = t!(file);
let path = file.path();
let path = path.to_str().unwrap();
invoke_rustdoc(builder, compiler, target, path);
}
if builder.was_invoked_explicitly::<Self>() {
let out = builder.doc_out(target);
let index = out.join("book").join("index.html");
open(builder, &index);
}
}
}
fn invoke_rustdoc(
builder: &Builder<'_>,
compiler: Compiler,
target: TargetSelection,
markdown: &str,
) {
let out = builder.doc_out(target);
let path = builder.src.join("src/doc").join(markdown);
let header = builder.src.join("src/doc/redirect.inc");
let footer = builder.src.join("src/doc/footer.inc");
let version_info = out.join("version_info.html");
let mut cmd = builder.rustdoc_cmd(compiler);
let out = out.join("book");
cmd.arg("--html-after-content")
.arg(&footer)
.arg("--html-before-content")
.arg(&version_info)
.arg("--html-in-header")
.arg(&header)
.arg("--markdown-no-toc")
.arg("--markdown-playground-url")
.arg("https://play.rust-lang.org/")
.arg("-o")
.arg(&out)
.arg(&path)
.arg("--markdown-css")
.arg("../rust.css");
if !builder.config.docs_minification {
cmd.arg("-Z").arg("unstable-options").arg("--disable-minification");
}
builder.run(&mut cmd);
}
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct Standalone {
compiler: Compiler,
target: TargetSelection,
}
impl Step for Standalone {
type Output = ();
const DEFAULT: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
let builder = run.builder;
run.path("src/doc").default_condition(builder.config.docs)
}
fn make_run(run: RunConfig<'_>) {
run.builder.ensure(Standalone {
compiler: run.builder.compiler(run.builder.top_stage, run.builder.config.build),
target: run.target,
});
}
/// Generates all standalone documentation as compiled by the rustdoc in `stage`
/// for the `target` into `out`.
///
/// This will list all of `src/doc` looking for markdown files and appropriately
/// perform transformations like substituting `VERSION`, `SHORT_HASH`, and
/// `STAMP` along with providing the various header/footer HTML we've customized.
///
/// In the end, this is just a glorified wrapper around rustdoc!
fn run(self, builder: &Builder<'_>) {
let target = self.target;
let compiler = self.compiler;
builder.info(&format!("Documenting standalone ({})", target));
let out = builder.doc_out(target);
t!(fs::create_dir_all(&out));
let favicon = builder.src.join("src/doc/favicon.inc");
let footer = builder.src.join("src/doc/footer.inc");
let full_toc = builder.src.join("src/doc/full-toc.inc");
t!(fs::copy(builder.src.join("src/doc/rust.css"), out.join("rust.css")));
let version_input = builder.src.join("src/doc/version_info.html.template");
let version_info = out.join("version_info.html");
if !builder.config.dry_run && !up_to_date(&version_input, &version_info) {
let info = t!(fs::read_to_string(&version_input))
.replace("VERSION", &builder.rust_release())
.replace("SHORT_HASH", builder.rust_info.sha_short().unwrap_or(""))
.replace("STAMP", builder.rust_info.sha().unwrap_or(""));
t!(fs::write(&version_info, &info));
}
for file in t!(fs::read_dir(builder.src.join("src/doc"))) {
let file = t!(file);
let path = file.path();
let filename = path.file_name().unwrap().to_str().unwrap();
if !filename.ends_with(".md") || filename == "README.md" {
continue;
}
let html = out.join(filename).with_extension("html");
let rustdoc = builder.rustdoc(compiler);
if up_to_date(&path, &html)
&& up_to_date(&footer, &html)
&& up_to_date(&favicon, &html)
&& up_to_date(&full_toc, &html)
&& (builder.config.dry_run || up_to_date(&version_info, &html))
&& (builder.config.dry_run || up_to_date(&rustdoc, &html))
{
continue;
}
let mut cmd = builder.rustdoc_cmd(compiler);
// Needed for --index-page flag
cmd.arg("-Z").arg("unstable-options");
cmd.arg("--html-after-content")
.arg(&footer)
.arg("--html-before-content")
.arg(&version_info)
.arg("--html-in-header")
.arg(&favicon)
.arg("--markdown-no-toc")
.arg("--index-page")
.arg(&builder.src.join("src/doc/index.md"))
.arg("--markdown-playground-url")
.arg("https://play.rust-lang.org/")
.arg("-o")
.arg(&out)
.arg(&path);
if !builder.config.docs_minification {
cmd.arg("--disable-minification");
}
if filename == "not_found.md" {
cmd.arg("--markdown-css")
.arg(format!("https://doc.rust-lang.org/rustdoc{}.css", &builder.version))
.arg("--markdown-css")
.arg("https://doc.rust-lang.org/rust.css");
} else {
cmd.arg("--markdown-css")
.arg(format!("rustdoc{}.css", &builder.version))
.arg("--markdown-css")
.arg("rust.css");
}
builder.run(&mut cmd);
}
// We open doc/index.html as the default if invoked as `x.py doc --open`
// with no particular explicit doc requested (e.g. library/core).
if builder.paths.is_empty() || builder.was_invoked_explicitly::<Self>() {
let index = out.join("index.html");
open(builder, &index);
}
}
}
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct Std {
pub stage: u32,
pub target: TargetSelection,
}
impl Step for Std {
type Output = ();
const DEFAULT: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
let builder = run.builder;
run.all_krates("test").default_condition(builder.config.docs)
}
fn make_run(run: RunConfig<'_>) {
run.builder.ensure(Std { stage: run.builder.top_stage, target: run.target });
}
/// Compile all standard library documentation.
///
/// This will generate all documentation for the standard library and its
/// dependencies. This is largely just a wrapper around `cargo doc`.
fn run(self, builder: &Builder<'_>) {
let stage = self.stage;
let target = self.target;
builder.info(&format!("Documenting stage{} std ({})", stage, target));
let out = builder.doc_out(target);
t!(fs::create_dir_all(&out));
let compiler = builder.compiler(stage, builder.config.build);
builder.ensure(compile::Std { compiler, target });
let out_dir = builder.stage_out(compiler, Mode::Std).join(target.triple).join("doc");
t!(fs::copy(builder.src.join("src/doc/rust.css"), out.join("rust.css")));
let run_cargo_rustdoc_for = |package: &str| {
let mut cargo =
builder.cargo(compiler, Mode::Std, SourceType::InTree, target, "rustdoc");
compile::std_cargo(builder, target, compiler.stage, &mut cargo);
cargo
.arg("-p")
.arg(package)
.arg("-Zskip-rustdoc-fingerprint")
.arg("--")
.arg("--markdown-css")
.arg("rust.css")
.arg("--markdown-no-toc")
.arg("-Z")
.arg("unstable-options")
.arg("--resource-suffix")
.arg(&builder.version)
.arg("--index-page")
.arg(&builder.src.join("src/doc/index.md"));
if !builder.config.docs_minification {
cargo.arg("--disable-minification");
}
builder.run(&mut cargo.into());
};
let paths = builder
.paths
.iter()
.map(components_simplified)
.filter_map(|path| {
if path.get(0) == Some(&"library") {
Some(path[1].to_owned())
} else if !path.is_empty() {
Some(path[0].to_owned())
} else {
None
}
})
.collect::<Vec<_>>();
// Only build the following crates. While we could just iterate over the
// folder structure, that would also build internal crates that we do
// not want to show in documentation. These crates will later be visited
// by the rustc step, so internal documentation will show them.
//
// Note that the order here is important! The crates need to be
// processed starting from the leaves, otherwise rustdoc will not
// create correct links between crates because rustdoc depends on the
// existence of the output directories to know if it should be a local
// or remote link.
let krates = ["core", "alloc", "std", "proc_macro", "test"];
for krate in &krates {
run_cargo_rustdoc_for(krate);
if paths.iter().any(|p| p == krate) {
// No need to document more of the libraries if we have the one we want.
break;
}
}
builder.cp_r(&out_dir, &out);
// Look for library/std, library/core etc in the `x.py doc` arguments and
// open the corresponding rendered docs.
for requested_crate in paths {
if krates.iter().any(|k| *k == requested_crate.as_str()) {
let index = out.join(requested_crate).join("index.html");
open(builder, &index);
}
}
}
}
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct Rustc {
pub stage: u32,
pub target: TargetSelection,
}
impl Step for Rustc {
type Output = ();
const DEFAULT: bool = true;
const ONLY_HOSTS: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
let builder = run.builder;
run.krate("rustc-main").path("compiler").default_condition(builder.config.docs)
}
fn make_run(run: RunConfig<'_>) {
run.builder.ensure(Rustc { stage: run.builder.top_stage, target: run.target });
}
/// Generates compiler documentation.
///
/// This will generate all documentation for compiler and dependencies.
/// Compiler documentation is distributed separately, so we make sure
/// we do not merge it with the other documentation from std, test and
/// proc_macros. This is largely just a wrapper around `cargo doc`.
fn run(self, builder: &Builder<'_>) {
let stage = self.stage;
let target = self.target;
builder.info(&format!("Documenting stage{} compiler ({})", stage, target));
let paths = builder
.paths
.iter()
.map(components_simplified)
.filter_map(|path| {
if path.get(0) == Some(&"compiler") {
path.get(1).map(|p| p.to_owned())
} else {
None
}
})
.collect::<Vec<_>>();
if !builder.config.compiler_docs && !builder.was_invoked_explicitly::<Self>() {
builder.info("\tskipping - compiler/librustdoc docs disabled");
return;
}
// This is the intended out directory for compiler documentation.
let out = builder.compiler_doc_out(target);
t!(fs::create_dir_all(&out));
// Build rustc.
let compiler = builder.compiler(stage, builder.config.build);
builder.ensure(compile::Rustc { compiler, target });
// This uses a shared directory so that librustdoc documentation gets
// correctly built and merged with the rustc documentation. This is
// needed because rustdoc is built in a different directory from
// rustc. rustdoc needs to be able to see everything, for example when
// merging the search index, or generating local (relative) links.
let out_dir = builder.stage_out(compiler, Mode::Rustc).join(target.triple).join("doc");
t!(symlink_dir_force(&builder.config, &out, &out_dir));
// Cargo puts proc macros in `target/doc` even if you pass `--target`
// explicitly (https://github.com/rust-lang/cargo/issues/7677).
let proc_macro_out_dir = builder.stage_out(compiler, Mode::Rustc).join("doc");
t!(symlink_dir_force(&builder.config, &out, &proc_macro_out_dir));
// Build cargo command.
let mut cargo = builder.cargo(compiler, Mode::Rustc, SourceType::InTree, target, "doc");
cargo.rustdocflag("--document-private-items");
// Since we always pass --document-private-items, there's no need to warn about linking to private items.
cargo.rustdocflag("-Arustdoc::private-intra-doc-links");
cargo.rustdocflag("--enable-index-page");
cargo.rustdocflag("-Zunstable-options");
cargo.rustdocflag("-Znormalize-docs");
cargo.rustdocflag("--show-type-layout");
cargo.rustdocflag("--generate-link-to-definition");
compile::rustc_cargo(builder, &mut cargo, target);
cargo.arg("-Zunstable-options");
cargo.arg("-Zskip-rustdoc-fingerprint");
// Only include compiler crates, no dependencies of those, such as `libc`.
// Do link to dependencies on `docs.rs` however using `rustdoc-map`.
cargo.arg("--no-deps");
cargo.arg("-Zrustdoc-map");
// FIXME: `-Zrustdoc-map` does not yet correctly work for transitive dependencies,
// once this is no longer an issue the special case for `ena` can be removed.
cargo.rustdocflag("--extern-html-root-url");
cargo.rustdocflag("ena=https://docs.rs/ena/latest/");
let mut compiler_crates = HashSet::new();
if paths.is_empty() {
// Find dependencies for top level crates.
for root_crate in &["rustc_driver", "rustc_codegen_llvm", "rustc_codegen_ssa"] {
compiler_crates.extend(
builder
.in_tree_crates(root_crate, Some(target))
.into_iter()
.map(|krate| krate.name),
);
}
} else {
for root_crate in paths {
if !builder.src.join("compiler").join(&root_crate).exists() {
builder.info(&format!(
"\tskipping - compiler/{} (unknown compiler crate)",
root_crate
));
} else {
compiler_crates.extend(
builder
.in_tree_crates(root_crate, Some(target))
.into_iter()
.map(|krate| krate.name),
);
}
}
}
let mut to_open = None;
for krate in &compiler_crates {
// Create all crate output directories first to make sure rustdoc uses
// relative links.
// FIXME: Cargo should probably do this itself.
t!(fs::create_dir_all(out_dir.join(krate)));
cargo.arg("-p").arg(krate);
if to_open.is_none() {
to_open = Some(krate);
}
}
builder.run(&mut cargo.into());
// Let's open the first crate documentation page:
if let Some(krate) = to_open {
let index = out.join(krate).join("index.html");
open(builder, &index);
}
}
}
macro_rules! tool_doc {
($tool: ident, $should_run: literal, $path: literal, [$($krate: literal),+ $(,)?] $(,)?) => {
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct $tool {
stage: u32,
target: TargetSelection,
}
impl Step for $tool {
type Output = ();
const DEFAULT: bool = true;
const ONLY_HOSTS: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
run.krate($should_run)
}
fn make_run(run: RunConfig<'_>) {
run.builder.ensure($tool { stage: run.builder.top_stage, target: run.target });
}
/// Generates compiler documentation.
///
/// This will generate all documentation for compiler and dependencies.
/// Compiler documentation is distributed separately, so we make sure
/// we do not merge it with the other documentation from std, test and
/// proc_macros. This is largely just a wrapper around `cargo doc`.
fn run(self, builder: &Builder<'_>) {
let stage = self.stage;
let target = self.target;
builder.info(
&format!(
"Documenting stage{} {} ({})",
stage,
stringify!($tool).to_lowercase(),
target,
),
);
// This is the intended out directory for compiler documentation.
let out = builder.compiler_doc_out(target);
t!(fs::create_dir_all(&out));
let compiler = builder.compiler(stage, builder.config.build);
if !builder.config.compiler_docs && !builder.was_invoked_explicitly::<Self>() {
builder.info("\tskipping - compiler/tool docs disabled");
return;
}
// Build rustc docs so that we generate relative links.
builder.ensure(Rustc { stage, target });
// Symlink compiler docs to the output directory of rustdoc documentation.
let out_dir = builder.stage_out(compiler, Mode::ToolRustc).join(target.triple).join("doc");
t!(fs::create_dir_all(&out_dir));
t!(symlink_dir_force(&builder.config, &out, &out_dir));
// Build cargo command.
let mut cargo = prepare_tool_cargo(
builder,
compiler,
Mode::ToolRustc,
target,
"doc",
$path,
SourceType::InTree,
&[],
);
cargo.arg("-Zskip-rustdoc-fingerprint");
// Only include compiler crates, no dependencies of those, such as `libc`.
cargo.arg("--no-deps");
$(
cargo.arg("-p").arg($krate);
)+
cargo.rustdocflag("--document-private-items");
cargo.rustdocflag("--enable-index-page");
cargo.rustdocflag("--show-type-layout");
cargo.rustdocflag("--generate-link-to-definition");
cargo.rustdocflag("-Zunstable-options");
builder.run(&mut cargo.into());
}
}
}
}
tool_doc!(Rustdoc, "rustdoc-tool", "src/tools/rustdoc", ["rustdoc", "rustdoc-json-types"]);
tool_doc!(
Rustfmt,
"rustfmt-nightly",
"src/tools/rustfmt",
["rustfmt-nightly", "rustfmt-config_proc_macro"],
);
#[derive(Ord, PartialOrd, Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct ErrorIndex {
pub target: TargetSelection,
}
impl Step for ErrorIndex {
type Output = ();
const DEFAULT: bool = true;
const ONLY_HOSTS: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
let builder = run.builder;
run.path("src/tools/error_index_generator").default_condition(builder.config.docs)
}
fn make_run(run: RunConfig<'_>) {
let target = run.target;
run.builder.ensure(ErrorIndex { target });
}
/// Generates the HTML rendered error-index by running the
/// `error_index_generator` tool.
fn run(self, builder: &Builder<'_>) {
builder.info(&format!("Documenting error index ({})", self.target));
let out = builder.doc_out(self.target);
t!(fs::create_dir_all(&out));
let mut index = tool::ErrorIndex::command(builder);
index.arg("html");
index.arg(out.join("error-index.html"));
index.arg(&builder.version);
builder.run(&mut index);
}
}
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct UnstableBookGen {
target: TargetSelection,
}
impl Step for UnstableBookGen {
type Output = ();
const DEFAULT: bool = true;
const ONLY_HOSTS: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
let builder = run.builder;
run.path("src/tools/unstable-book-gen").default_condition(builder.config.docs)
}
fn make_run(run: RunConfig<'_>) {
run.builder.ensure(UnstableBookGen { target: run.target });
}
fn run(self, builder: &Builder<'_>) {
let target = self.target;
builder.info(&format!("Generating unstable book md files ({})", target));
let out = builder.md_doc_out(target).join("unstable-book");
builder.create_dir(&out);
builder.remove_dir(&out);
let mut cmd = builder.tool_cmd(Tool::UnstableBookGen);
cmd.arg(builder.src.join("library"));
cmd.arg(builder.src.join("compiler"));
cmd.arg(builder.src.join("src"));
cmd.arg(out);
builder.run(&mut cmd);
}
}
fn symlink_dir_force(config: &Config, src: &Path, dst: &Path) -> io::Result<()> {
if config.dry_run {
return Ok(());
}
if let Ok(m) = fs::symlink_metadata(dst) {
if m.file_type().is_dir() {
fs::remove_dir_all(dst)?;
} else {
// handle directory junctions on windows by falling back to
// `remove_dir`.
fs::remove_file(dst).or_else(|_| fs::remove_dir(dst))?;
}
}
symlink_dir(config, src, dst)
}
#[derive(Ord, PartialOrd, Debug, Copy, Clone, Hash, PartialEq, Eq)]
pub struct RustcBook {
pub compiler: Compiler,
pub target: TargetSelection,
pub validate: bool,
}
impl Step for RustcBook {
type Output = ();
const DEFAULT: bool = true;
const ONLY_HOSTS: bool = true;
fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
let builder = run.builder;
run.path("src/doc/rustc").default_condition(builder.config.docs)
}
fn make_run(run: RunConfig<'_>) {
run.builder.ensure(RustcBook {
compiler: run.builder.compiler(run.builder.top_stage, run.builder.config.build),
target: run.target,
validate: false,
});
}
/// Builds the rustc book.
///
/// The lints are auto-generated by a tool, and then merged into the book
/// in the "md-doc" directory in the build output directory. Then
/// "rustbook" is used to convert it to HTML.
fn run(self, builder: &Builder<'_>) {
let out_base = builder.md_doc_out(self.target).join("rustc");
t!(fs::create_dir_all(&out_base));
let out_listing = out_base.join("src/lints");
builder.cp_r(&builder.src.join("src/doc/rustc"), &out_base);
builder.info(&format!("Generating lint docs ({})", self.target));
let rustc = builder.rustc(self.compiler);
// The tool runs `rustc` for extracting output examples, so it needs a
// functional sysroot.
builder.ensure(compile::Std { compiler: self.compiler, target: self.target });
let mut cmd = builder.tool_cmd(Tool::LintDocs);
cmd.arg("--src");
cmd.arg(builder.src.join("compiler"));
cmd.arg("--out");
cmd.arg(&out_listing);
cmd.arg("--rustc");
cmd.arg(&rustc);
cmd.arg("--rustc-target").arg(&self.target.rustc_target_arg());
if builder.config.verbose() {
cmd.arg("--verbose");
}
if self.validate {
cmd.arg("--validate");
}
// If the lib directories are in an unusual location (changed in
// config.toml), then this needs to explicitly update the dylib search
// path.
builder.add_rustc_lib_path(self.compiler, &mut cmd);
builder.run(&mut cmd);
// Run rustbook/mdbook to generate the HTML pages.
builder.ensure(RustbookSrc {
target: self.target,
name: INTERNER.intern_str("rustc"),
src: INTERNER.intern_path(out_base),
});
if builder.was_invoked_explicitly::<Self>() {
let out = builder.doc_out(self.target);
let index = out.join("rustc").join("index.html");
open(builder, &index);
}
}
}