| //! Runs rustfmt on the repository. |
| |
| use crate::Build; |
| use build_helper::{output, t}; |
| use ignore::WalkBuilder; |
| use std::path::Path; |
| use std::process::{Command, Stdio}; |
| |
| fn rustfmt(src: &Path, rustfmt: &Path, path: &Path, check: bool) { |
| let mut cmd = Command::new(&rustfmt); |
| // avoid the submodule config paths from coming into play, |
| // we only allow a single global config for the workspace for now |
| cmd.arg("--config-path").arg(&src.canonicalize().unwrap()); |
| cmd.arg("--edition").arg("2018"); |
| cmd.arg("--unstable-features"); |
| cmd.arg("--skip-children"); |
| if check { |
| cmd.arg("--check"); |
| } |
| cmd.arg(&path); |
| let cmd_debug = format!("{:?}", cmd); |
| let status = cmd.status().expect("executing rustfmt"); |
| if !status.success() { |
| eprintln!( |
| "Running `{}` failed.\nIf you're running `tidy`, \ |
| try again with `--bless`. Or, if you just want to format \ |
| code, run `./x.py fmt` instead.", |
| cmd_debug, |
| ); |
| std::process::exit(1); |
| } |
| } |
| |
| #[derive(serde::Deserialize)] |
| struct RustfmtConfig { |
| ignore: Vec<String>, |
| } |
| |
| pub fn format(build: &Build, check: bool) { |
| if build.config.dry_run { |
| return; |
| } |
| let mut builder = ignore::types::TypesBuilder::new(); |
| builder.add_defaults(); |
| builder.select("rust"); |
| let matcher = builder.build().unwrap(); |
| let rustfmt_config = build.src.join("rustfmt.toml"); |
| if !rustfmt_config.exists() { |
| eprintln!("Not running formatting checks; rustfmt.toml does not exist."); |
| eprintln!("This may happen in distributed tarballs."); |
| return; |
| } |
| let rustfmt_config = t!(std::fs::read_to_string(&rustfmt_config)); |
| let rustfmt_config: RustfmtConfig = t!(toml::from_str(&rustfmt_config)); |
| let mut ignore_fmt = ignore::overrides::OverrideBuilder::new(&build.src); |
| for ignore in rustfmt_config.ignore { |
| ignore_fmt.add(&format!("!{}", ignore)).expect(&ignore); |
| } |
| let git_available = match Command::new("git") |
| .arg("--version") |
| .stdout(Stdio::null()) |
| .stderr(Stdio::null()) |
| .status() |
| { |
| Ok(status) => status.success(), |
| Err(_) => false, |
| }; |
| if git_available { |
| let in_working_tree = match Command::new("git") |
| .arg("rev-parse") |
| .arg("--is-inside-work-tree") |
| .stdout(Stdio::null()) |
| .stderr(Stdio::null()) |
| .status() |
| { |
| Ok(status) => status.success(), |
| Err(_) => false, |
| }; |
| if in_working_tree { |
| let untracked_paths_output = output( |
| Command::new("git") |
| .arg("status") |
| .arg("--porcelain") |
| .arg("--untracked-files=normal"), |
| ); |
| let untracked_paths = untracked_paths_output |
| .lines() |
| .filter(|entry| entry.starts_with("??")) |
| .map(|entry| { |
| entry.split(' ').nth(1).expect("every git status entry should list a path") |
| }); |
| for untracked_path in untracked_paths { |
| eprintln!("skip untracked path {} during rustfmt invocations", untracked_path); |
| ignore_fmt.add(&format!("!{}", untracked_path)).expect(&untracked_path); |
| } |
| } else { |
| eprintln!("Not in git tree. Skipping git-aware format checks"); |
| } |
| } else { |
| eprintln!("Could not find usable git. Skipping git-aware format checks"); |
| } |
| let ignore_fmt = ignore_fmt.build().unwrap(); |
| |
| let rustfmt_path = build.config.initial_rustfmt.as_ref().unwrap_or_else(|| { |
| eprintln!("./x.py fmt is not supported on this channel"); |
| std::process::exit(1); |
| }); |
| let src = &build.src; |
| let walker = WalkBuilder::new(src).types(matcher).overrides(ignore_fmt).build_parallel(); |
| walker.run(|| { |
| Box::new(move |entry| { |
| let entry = t!(entry); |
| if entry.file_type().map_or(false, |t| t.is_file()) { |
| rustfmt(src, &rustfmt_path, &entry.path(), check); |
| } |
| ignore::WalkState::Continue |
| }) |
| }); |
| } |