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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/bootstrap/flags.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/bootstrap/flags.rs | 817 |
1 files changed, 817 insertions, 0 deletions
diff --git a/src/bootstrap/flags.rs b/src/bootstrap/flags.rs new file mode 100644 index 000000000..80b3bcce8 --- /dev/null +++ b/src/bootstrap/flags.rs @@ -0,0 +1,817 @@ +//! Command-line interface of the rustbuild build system. +//! +//! This module implements the command-line parsing of the build system which +//! has various flags to configure how it's run. + +use std::path::PathBuf; + +use getopts::Options; + +use crate::builder::{Builder, Kind}; +use crate::config::{Config, TargetSelection}; +use crate::setup::Profile; +use crate::util::t; +use crate::{Build, DocTests}; + +#[derive(Copy, Clone)] +pub enum Color { + Always, + Never, + Auto, +} + +impl Default for Color { + fn default() -> Self { + Self::Auto + } +} + +impl std::str::FromStr for Color { + type Err = (); + + fn from_str(s: &str) -> Result<Self, Self::Err> { + match s.to_lowercase().as_str() { + "always" => Ok(Self::Always), + "never" => Ok(Self::Never), + "auto" => Ok(Self::Auto), + _ => Err(()), + } + } +} + +/// Deserialized version of all flags for this compile. +pub struct Flags { + pub verbose: usize, // number of -v args; each extra -v after the first is passed to Cargo + pub on_fail: Option<String>, + pub stage: Option<u32>, + pub keep_stage: Vec<u32>, + pub keep_stage_std: Vec<u32>, + + pub host: Option<Vec<TargetSelection>>, + pub target: Option<Vec<TargetSelection>>, + pub config: Option<PathBuf>, + pub build_dir: Option<PathBuf>, + pub jobs: Option<u32>, + pub cmd: Subcommand, + pub incremental: bool, + pub exclude: Vec<PathBuf>, + pub include_default_paths: bool, + pub rustc_error_format: Option<String>, + pub json_output: bool, + pub dry_run: bool, + pub color: Color, + + // This overrides the deny-warnings configuration option, + // which passes -Dwarnings to the compiler invocations. + // + // true => deny, false => warn + pub deny_warnings: Option<bool>, + + pub llvm_skip_rebuild: Option<bool>, + + pub rust_profile_use: Option<String>, + pub rust_profile_generate: Option<String>, + + pub llvm_profile_use: Option<String>, + // LLVM doesn't support a custom location for generating profile + // information. + // + // llvm_out/build/profiles/ is the location this writes to. + pub llvm_profile_generate: bool, +} + +#[cfg_attr(test, derive(Clone))] +pub enum Subcommand { + Build { + paths: Vec<PathBuf>, + }, + Check { + paths: Vec<PathBuf>, + }, + Clippy { + fix: bool, + paths: Vec<PathBuf>, + clippy_lint_allow: Vec<String>, + clippy_lint_deny: Vec<String>, + clippy_lint_warn: Vec<String>, + clippy_lint_forbid: Vec<String>, + }, + Fix { + paths: Vec<PathBuf>, + }, + Format { + paths: Vec<PathBuf>, + check: bool, + }, + Doc { + paths: Vec<PathBuf>, + open: bool, + }, + Test { + paths: Vec<PathBuf>, + /// Whether to automatically update stderr/stdout files + bless: bool, + force_rerun: bool, + compare_mode: Option<String>, + pass: Option<String>, + run: Option<String>, + skip: Vec<String>, + test_args: Vec<String>, + rustc_args: Vec<String>, + fail_fast: bool, + doc_tests: DocTests, + rustfix_coverage: bool, + }, + Bench { + paths: Vec<PathBuf>, + test_args: Vec<String>, + }, + Clean { + all: bool, + }, + Dist { + paths: Vec<PathBuf>, + }, + Install { + paths: Vec<PathBuf>, + }, + Run { + paths: Vec<PathBuf>, + }, + Setup { + profile: Profile, + }, +} + +impl Default for Subcommand { + fn default() -> Subcommand { + Subcommand::Build { paths: vec![PathBuf::from("nowhere")] } + } +} + +impl Flags { + pub fn parse(args: &[String]) -> Flags { + let mut subcommand_help = String::from( + "\ +Usage: x.py <subcommand> [options] [<paths>...] + +Subcommands: + build, b Compile either the compiler or libraries + check, c Compile either the compiler or libraries, using cargo check + clippy Run clippy (uses rustup/cargo-installed clippy binary) + fix Run cargo fix + fmt Run rustfmt + test, t Build and run some test suites + bench Build and run some benchmarks + doc, d Build documentation + clean Clean out build directories + dist Build distribution artifacts + install Install distribution artifacts + run, r Run tools contained in this repository + setup Create a config.toml (making it easier to use `x.py` itself) + +To learn more about a subcommand, run `./x.py <subcommand> -h`", + ); + + let mut opts = Options::new(); + // Options common to all subcommands + opts.optflagmulti("v", "verbose", "use verbose output (-vv for very verbose)"); + opts.optflag("i", "incremental", "use incremental compilation"); + opts.optopt("", "config", "TOML configuration file for build", "FILE"); + opts.optopt( + "", + "build-dir", + "Build directory, overrides `build.build-dir` in `config.toml`", + "DIR", + ); + opts.optopt("", "build", "build target of the stage0 compiler", "BUILD"); + opts.optmulti("", "host", "host targets to build", "HOST"); + opts.optmulti("", "target", "target targets to build", "TARGET"); + opts.optmulti("", "exclude", "build paths to exclude", "PATH"); + opts.optflag( + "", + "include-default-paths", + "include default paths in addition to the provided ones", + ); + opts.optopt("", "on-fail", "command to run on failure", "CMD"); + opts.optflag("", "dry-run", "dry run; don't build anything"); + opts.optopt( + "", + "stage", + "stage to build (indicates compiler to use/test, e.g., stage 0 uses the \ + bootstrap compiler, stage 1 the stage 0 rustc artifacts, etc.)", + "N", + ); + opts.optmulti( + "", + "keep-stage", + "stage(s) to keep without recompiling \ + (pass multiple times to keep e.g., both stages 0 and 1)", + "N", + ); + opts.optmulti( + "", + "keep-stage-std", + "stage(s) of the standard library to keep without recompiling \ + (pass multiple times to keep e.g., both stages 0 and 1)", + "N", + ); + opts.optopt("", "src", "path to the root of the rust checkout", "DIR"); + let j_msg = format!( + "number of jobs to run in parallel; \ + defaults to {} (this host's logical CPU count)", + num_cpus::get() + ); + opts.optopt("j", "jobs", &j_msg, "JOBS"); + opts.optflag("h", "help", "print this help message"); + opts.optopt( + "", + "warnings", + "if value is deny, will deny warnings, otherwise use default", + "VALUE", + ); + opts.optopt("", "error-format", "rustc error format", "FORMAT"); + opts.optflag("", "json-output", "use message-format=json"); + opts.optopt("", "color", "whether to use color in cargo and rustc output", "STYLE"); + opts.optopt( + "", + "llvm-skip-rebuild", + "whether rebuilding llvm should be skipped \ + a VALUE of TRUE indicates that llvm will not be rebuilt \ + VALUE overrides the skip-rebuild option in config.toml.", + "VALUE", + ); + opts.optopt( + "", + "rust-profile-generate", + "generate PGO profile with rustc build", + "PROFILE", + ); + opts.optopt("", "rust-profile-use", "use PGO profile for rustc build", "PROFILE"); + opts.optflag("", "llvm-profile-generate", "generate PGO profile with llvm built for rustc"); + opts.optopt("", "llvm-profile-use", "use PGO profile for llvm build", "PROFILE"); + opts.optmulti("A", "", "allow certain clippy lints", "OPT"); + opts.optmulti("D", "", "deny certain clippy lints", "OPT"); + opts.optmulti("W", "", "warn about certain clippy lints", "OPT"); + opts.optmulti("F", "", "forbid certain clippy lints", "OPT"); + + // We can't use getopt to parse the options until we have completed specifying which + // options are valid, but under the current implementation, some options are conditional on + // the subcommand. Therefore we must manually identify the subcommand first, so that we can + // complete the definition of the options. Then we can use the getopt::Matches object from + // there on out. + let subcommand = match args.iter().find_map(|s| Kind::parse(&s)) { + Some(s) => s, + None => { + // No or an invalid subcommand -- show the general usage and subcommand help + // An exit code will be 0 when no subcommand is given, and 1 in case of an invalid + // subcommand. + println!("{}\n", subcommand_help); + let exit_code = if args.is_empty() { 0 } else { 1 }; + crate::detail_exit(exit_code); + } + }; + + // Some subcommands get extra options + match subcommand { + Kind::Test => { + opts.optflag("", "no-fail-fast", "Run all tests regardless of failure"); + opts.optmulti("", "skip", "skips tests matching SUBSTRING, if supported by test tool. May be passed multiple times", "SUBSTRING"); + opts.optmulti( + "", + "test-args", + "extra arguments to be passed for the test tool being used \ + (e.g. libtest, compiletest or rustdoc)", + "ARGS", + ); + opts.optmulti( + "", + "rustc-args", + "extra options to pass the compiler when running tests", + "ARGS", + ); + opts.optflag("", "no-doc", "do not run doc tests"); + opts.optflag("", "doc", "only run doc tests"); + opts.optflag("", "bless", "update all stderr/stdout files of failing ui tests"); + opts.optflag("", "force-rerun", "rerun tests even if the inputs are unchanged"); + opts.optopt( + "", + "compare-mode", + "mode describing what file the actual ui output will be compared to", + "COMPARE MODE", + ); + opts.optopt( + "", + "pass", + "force {check,build,run}-pass tests to this mode.", + "check | build | run", + ); + opts.optopt("", "run", "whether to execute run-* tests", "auto | always | never"); + opts.optflag( + "", + "rustfix-coverage", + "enable this to generate a Rustfix coverage file, which is saved in \ + `/<build_base>/rustfix_missing_coverage.txt`", + ); + } + Kind::Check => { + opts.optflag("", "all-targets", "Check all targets"); + } + Kind::Bench => { + opts.optmulti("", "test-args", "extra arguments", "ARGS"); + } + Kind::Clippy => { + opts.optflag("", "fix", "automatically apply lint suggestions"); + } + Kind::Doc => { + opts.optflag("", "open", "open the docs in a browser"); + } + Kind::Clean => { + opts.optflag("", "all", "clean all build artifacts"); + } + Kind::Format => { + opts.optflag("", "check", "check formatting instead of applying."); + } + _ => {} + }; + + // fn usage() + let usage = |exit_code: i32, opts: &Options, verbose: bool, subcommand_help: &str| -> ! { + let config = Config::parse(&["build".to_string()]); + let build = Build::new(config); + let paths = Builder::get_help(&build, subcommand); + + println!("{}", opts.usage(subcommand_help)); + if let Some(s) = paths { + if verbose { + println!("{}", s); + } else { + println!( + "Run `./x.py {} -h -v` to see a list of available paths.", + subcommand.as_str() + ); + } + } else if verbose { + panic!("No paths available for subcommand `{}`", subcommand.as_str()); + } + crate::detail_exit(exit_code); + }; + + // Done specifying what options are possible, so do the getopts parsing + let matches = opts.parse(args).unwrap_or_else(|e| { + // Invalid argument/option format + println!("\n{}\n", e); + usage(1, &opts, false, &subcommand_help); + }); + + // Extra sanity check to make sure we didn't hit this crazy corner case: + // + // ./x.py --frobulate clean build + // ^-- option ^ ^- actual subcommand + // \_ arg to option could be mistaken as subcommand + let mut pass_sanity_check = true; + match matches.free.get(0).and_then(|s| Kind::parse(&s)) { + Some(check_subcommand) => { + if check_subcommand != subcommand { + pass_sanity_check = false; + } + } + None => { + pass_sanity_check = false; + } + } + if !pass_sanity_check { + eprintln!("{}\n", subcommand_help); + eprintln!( + "Sorry, I couldn't figure out which subcommand you were trying to specify.\n\ + You may need to move some options to after the subcommand.\n" + ); + crate::detail_exit(1); + } + // Extra help text for some commands + match subcommand { + Kind::Build => { + subcommand_help.push_str( + "\n +Arguments: + This subcommand accepts a number of paths to directories to the crates + and/or artifacts to compile. For example, for a quick build of a usable + compiler: + + ./x.py build --stage 1 library/std + + This will build a compiler and standard library from the local source code. + Once this is done, build/$ARCH/stage1 contains a usable compiler. + + If no arguments are passed then the default artifacts for that stage are + compiled. For example: + + ./x.py build --stage 0 + ./x.py build ", + ); + } + Kind::Check => { + subcommand_help.push_str( + "\n +Arguments: + This subcommand accepts a number of paths to directories to the crates + and/or artifacts to compile. For example: + + ./x.py check library/std + + If no arguments are passed then many artifacts are checked.", + ); + } + Kind::Clippy => { + subcommand_help.push_str( + "\n +Arguments: + This subcommand accepts a number of paths to directories to the crates + and/or artifacts to run clippy against. For example: + + ./x.py clippy library/core + ./x.py clippy library/core library/proc_macro", + ); + } + Kind::Fix => { + subcommand_help.push_str( + "\n +Arguments: + This subcommand accepts a number of paths to directories to the crates + and/or artifacts to run `cargo fix` against. For example: + + ./x.py fix library/core + ./x.py fix library/core library/proc_macro", + ); + } + Kind::Format => { + subcommand_help.push_str( + "\n +Arguments: + This subcommand optionally accepts a `--check` flag which succeeds if formatting is correct and + fails if it is not. For example: + + ./x.py fmt + ./x.py fmt --check", + ); + } + Kind::Test => { + subcommand_help.push_str( + "\n +Arguments: + This subcommand accepts a number of paths to test directories that + should be compiled and run. For example: + + ./x.py test src/test/ui + ./x.py test library/std --test-args hash_map + ./x.py test library/std --stage 0 --no-doc + ./x.py test src/test/ui --bless + ./x.py test src/test/ui --compare-mode chalk + + Note that `test src/test/* --stage N` does NOT depend on `build compiler/rustc --stage N`; + just like `build library/std --stage N` it tests the compiler produced by the previous + stage. + + Execute tool tests with a tool name argument: + + ./x.py test tidy + + If no arguments are passed then the complete artifacts for that stage are + compiled and tested. + + ./x.py test + ./x.py test --stage 1", + ); + } + Kind::Doc => { + subcommand_help.push_str( + "\n +Arguments: + This subcommand accepts a number of paths to directories of documentation + to build. For example: + + ./x.py doc src/doc/book + ./x.py doc src/doc/nomicon + ./x.py doc src/doc/book library/std + ./x.py doc library/std --open + + If no arguments are passed then everything is documented: + + ./x.py doc + ./x.py doc --stage 1", + ); + } + Kind::Run => { + subcommand_help.push_str( + "\n +Arguments: + This subcommand accepts a number of paths to tools to build and run. For + example: + + ./x.py run src/tools/expand-yaml-anchors + + At least a tool needs to be called.", + ); + } + Kind::Setup => { + subcommand_help.push_str(&format!( + "\n +x.py setup creates a `config.toml` which changes the defaults for x.py itself. + +Arguments: + This subcommand accepts a 'profile' to use for builds. For example: + + ./x.py setup library + + The profile is optional and you will be prompted interactively if it is not given. + The following profiles are available: + +{}", + Profile::all_for_help(" ").trim_end() + )); + } + Kind::Bench | Kind::Clean | Kind::Dist | Kind::Install => {} + }; + // Get any optional paths which occur after the subcommand + let mut paths = matches.free[1..].iter().map(|p| p.into()).collect::<Vec<PathBuf>>(); + + let verbose = matches.opt_present("verbose"); + + // User passed in -h/--help? + if matches.opt_present("help") { + usage(0, &opts, verbose, &subcommand_help); + } + + let cmd = match subcommand { + Kind::Build => Subcommand::Build { paths }, + Kind::Check => { + if matches.opt_present("all-targets") { + println!( + "Warning: --all-targets is now on by default and does not need to be passed explicitly." + ); + } + Subcommand::Check { paths } + } + Kind::Clippy => Subcommand::Clippy { + paths, + fix: matches.opt_present("fix"), + clippy_lint_allow: matches.opt_strs("A"), + clippy_lint_warn: matches.opt_strs("W"), + clippy_lint_deny: matches.opt_strs("D"), + clippy_lint_forbid: matches.opt_strs("F"), + }, + Kind::Fix => Subcommand::Fix { paths }, + Kind::Test => Subcommand::Test { + paths, + bless: matches.opt_present("bless"), + force_rerun: matches.opt_present("force-rerun"), + compare_mode: matches.opt_str("compare-mode"), + pass: matches.opt_str("pass"), + run: matches.opt_str("run"), + skip: matches.opt_strs("skip"), + test_args: matches.opt_strs("test-args"), + rustc_args: matches.opt_strs("rustc-args"), + fail_fast: !matches.opt_present("no-fail-fast"), + rustfix_coverage: matches.opt_present("rustfix-coverage"), + doc_tests: if matches.opt_present("doc") { + DocTests::Only + } else if matches.opt_present("no-doc") { + DocTests::No + } else { + DocTests::Yes + }, + }, + Kind::Bench => Subcommand::Bench { paths, test_args: matches.opt_strs("test-args") }, + Kind::Doc => Subcommand::Doc { paths, open: matches.opt_present("open") }, + Kind::Clean => { + if !paths.is_empty() { + println!("\nclean does not take a path argument\n"); + usage(1, &opts, verbose, &subcommand_help); + } + + Subcommand::Clean { all: matches.opt_present("all") } + } + Kind::Format => Subcommand::Format { check: matches.opt_present("check"), paths }, + Kind::Dist => Subcommand::Dist { paths }, + Kind::Install => Subcommand::Install { paths }, + Kind::Run => { + if paths.is_empty() { + println!("\nrun requires at least a path!\n"); + usage(1, &opts, verbose, &subcommand_help); + } + Subcommand::Run { paths } + } + Kind::Setup => { + let profile = if paths.len() > 1 { + println!("\nat most one profile can be passed to setup\n"); + usage(1, &opts, verbose, &subcommand_help) + } else if let Some(path) = paths.pop() { + let profile_string = t!(path.into_os_string().into_string().map_err( + |path| format!("{} is not a valid UTF8 string", path.to_string_lossy()) + )); + + profile_string.parse().unwrap_or_else(|err| { + eprintln!("error: {}", err); + eprintln!("help: the available profiles are:"); + eprint!("{}", Profile::all_for_help("- ")); + crate::detail_exit(1); + }) + } else { + t!(crate::setup::interactive_path()) + }; + Subcommand::Setup { profile } + } + }; + + Flags { + verbose: matches.opt_count("verbose"), + stage: matches.opt_str("stage").map(|j| j.parse().expect("`stage` should be a number")), + dry_run: matches.opt_present("dry-run"), + on_fail: matches.opt_str("on-fail"), + rustc_error_format: matches.opt_str("error-format"), + json_output: matches.opt_present("json-output"), + keep_stage: matches + .opt_strs("keep-stage") + .into_iter() + .map(|j| j.parse().expect("`keep-stage` should be a number")) + .collect(), + keep_stage_std: matches + .opt_strs("keep-stage-std") + .into_iter() + .map(|j| j.parse().expect("`keep-stage-std` should be a number")) + .collect(), + host: if matches.opt_present("host") { + Some( + split(&matches.opt_strs("host")) + .into_iter() + .map(|x| TargetSelection::from_user(&x)) + .collect::<Vec<_>>(), + ) + } else { + None + }, + target: if matches.opt_present("target") { + Some( + split(&matches.opt_strs("target")) + .into_iter() + .map(|x| TargetSelection::from_user(&x)) + .collect::<Vec<_>>(), + ) + } else { + None + }, + config: matches.opt_str("config").map(PathBuf::from), + build_dir: matches.opt_str("build-dir").map(PathBuf::from), + jobs: matches.opt_str("jobs").map(|j| j.parse().expect("`jobs` should be a number")), + cmd, + incremental: matches.opt_present("incremental"), + exclude: split(&matches.opt_strs("exclude")) + .into_iter() + .map(|p| p.into()) + .collect::<Vec<_>>(), + include_default_paths: matches.opt_present("include-default-paths"), + deny_warnings: parse_deny_warnings(&matches), + llvm_skip_rebuild: matches.opt_str("llvm-skip-rebuild").map(|s| s.to_lowercase()).map( + |s| s.parse::<bool>().expect("`llvm-skip-rebuild` should be either true or false"), + ), + color: matches + .opt_get_default("color", Color::Auto) + .expect("`color` should be `always`, `never`, or `auto`"), + rust_profile_use: matches.opt_str("rust-profile-use"), + rust_profile_generate: matches.opt_str("rust-profile-generate"), + llvm_profile_use: matches.opt_str("llvm-profile-use"), + llvm_profile_generate: matches.opt_present("llvm-profile-generate"), + } + } +} + +impl Subcommand { + pub fn kind(&self) -> Kind { + match self { + Subcommand::Bench { .. } => Kind::Bench, + Subcommand::Build { .. } => Kind::Build, + Subcommand::Check { .. } => Kind::Check, + Subcommand::Clippy { .. } => Kind::Clippy, + Subcommand::Doc { .. } => Kind::Doc, + Subcommand::Fix { .. } => Kind::Fix, + Subcommand::Format { .. } => Kind::Format, + Subcommand::Test { .. } => Kind::Test, + Subcommand::Clean { .. } => Kind::Clean, + Subcommand::Dist { .. } => Kind::Dist, + Subcommand::Install { .. } => Kind::Install, + Subcommand::Run { .. } => Kind::Run, + Subcommand::Setup { .. } => Kind::Setup, + } + } + + pub fn test_args(&self) -> Vec<&str> { + let mut args = vec![]; + + match *self { + Subcommand::Test { ref skip, .. } => { + for s in skip { + args.push("--skip"); + args.push(s.as_str()); + } + } + _ => (), + }; + + match *self { + Subcommand::Test { ref test_args, .. } | Subcommand::Bench { ref test_args, .. } => { + args.extend(test_args.iter().flat_map(|s| s.split_whitespace())) + } + _ => (), + } + + args + } + + pub fn rustc_args(&self) -> Vec<&str> { + match *self { + Subcommand::Test { ref rustc_args, .. } => { + rustc_args.iter().flat_map(|s| s.split_whitespace()).collect() + } + _ => Vec::new(), + } + } + + pub fn fail_fast(&self) -> bool { + match *self { + Subcommand::Test { fail_fast, .. } => fail_fast, + _ => false, + } + } + + pub fn doc_tests(&self) -> DocTests { + match *self { + Subcommand::Test { doc_tests, .. } => doc_tests, + _ => DocTests::Yes, + } + } + + pub fn bless(&self) -> bool { + match *self { + Subcommand::Test { bless, .. } => bless, + _ => false, + } + } + + pub fn force_rerun(&self) -> bool { + match *self { + Subcommand::Test { force_rerun, .. } => force_rerun, + _ => false, + } + } + + pub fn rustfix_coverage(&self) -> bool { + match *self { + Subcommand::Test { rustfix_coverage, .. } => rustfix_coverage, + _ => false, + } + } + + pub fn compare_mode(&self) -> Option<&str> { + match *self { + Subcommand::Test { ref compare_mode, .. } => compare_mode.as_ref().map(|s| &s[..]), + _ => None, + } + } + + pub fn pass(&self) -> Option<&str> { + match *self { + Subcommand::Test { ref pass, .. } => pass.as_ref().map(|s| &s[..]), + _ => None, + } + } + + pub fn run(&self) -> Option<&str> { + match *self { + Subcommand::Test { ref run, .. } => run.as_ref().map(|s| &s[..]), + _ => None, + } + } + + pub fn open(&self) -> bool { + match *self { + Subcommand::Doc { open, .. } => open, + _ => false, + } + } +} + +fn split(s: &[String]) -> Vec<String> { + s.iter().flat_map(|s| s.split(',')).filter(|s| !s.is_empty()).map(|s| s.to_string()).collect() +} + +fn parse_deny_warnings(matches: &getopts::Matches) -> Option<bool> { + match matches.opt_str("warnings").as_deref() { + Some("deny") => Some(true), + Some("warn") => Some(false), + Some(value) => { + eprintln!(r#"invalid value for --warnings: {:?}, expected "warn" or "deny""#, value,); + crate::detail_exit(1); + } + None => None, + } +} |