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Simplify command-line-option declarations in the compiler

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This commit is contained in:
Zalathar 2024-11-07 22:47:15 +11:00
parent 584c8200de
commit 001013c63c
1 changed files with 147 additions and 117 deletions
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264
compiler/rustc_session/src/config.rs
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@ -12,7 +12,7 @@
use std::path::{Path, PathBuf};
use std::str::{self, FromStr};
use std::sync::LazyLock;
use std::{fmt, fs, iter};
use std::{cmp, fmt, fs, iter};
use rustc_data_structures::fx::{FxHashSet, FxIndexMap};
use rustc_data_structures::stable_hasher::{StableOrd, ToStableHashKey};
@ -1367,11 +1367,36 @@ pub fn build_target_config(early_dcx: &EarlyDiagCtxt, opts: &Options, sysroot: &
}
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
enum OptionStability {
pub enum OptionStability {
Stable,
Unstable,
}
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
pub enum OptionKind {
/// An option that takes a value, and cannot appear more than once (e.g. `--out-dir`).
///
/// Corresponds to [`getopts::Options::optopt`].
Opt,
/// An option that takes a value, and can appear multiple times (e.g. `--emit`).
///
/// Corresponds to [`getopts::Options::optmulti`].
Multi,
/// An option that does not take a value, and cannot appear more than once (e.g. `--help`).
///
/// Corresponds to [`getopts::Options::optflag`].
/// The `hint` string must be empty.
Flag,
/// An option that does not take a value, and can appear multiple times (e.g. `-O`).
///
/// Corresponds to [`getopts::Options::optflagmulti`].
/// The `hint` string must be empty.
FlagMulti,
}
pub struct RustcOptGroup {
apply: Box<dyn Fn(&mut getopts::Options) -> &mut getopts::Options>,
pub name: &'static str,
@ -1402,58 +1427,37 @@ pub fn unstable<F>(name: &'static str, f: F) -> RustcOptGroup
}
}
// The `opt` local module holds wrappers around the `getopts` API that
// adds extra rustc-specific metadata to each option; such metadata
// is exposed by . The public
// functions below ending with `_u` are the functions that return
// *unstable* options, i.e., options that are only enabled when the
// user also passes the `-Z unstable-options` debugging flag.
mod opt {
// The `fn flag*` etc below are written so that we can use them
// in the future; do not warn about them not being used right now.
#![allow(dead_code)]
use super::RustcOptGroup;
type R = RustcOptGroup;
type S = &'static str;
fn stable<F>(name: S, f: F) -> R
where
F: Fn(&mut getopts::Options) -> &mut getopts::Options + 'static,
{
RustcOptGroup::stable(name, f)
}
fn unstable<F>(name: S, f: F) -> R
where
F: Fn(&mut getopts::Options) -> &mut getopts::Options + 'static,
{
RustcOptGroup::unstable(name, f)
}
fn longer(a: S, b: S) -> S {
if a.len() > b.len() { a } else { b }
}
pub(crate) fn opt_s(a: S, b: S, c: S, d: S) -> R {
stable(longer(a, b), move |opts| opts.optopt(a, b, c, d))
}
pub(crate) fn multi_s(a: S, b: S, c: S, d: S) -> R {
stable(longer(a, b), move |opts| opts.optmulti(a, b, c, d))
}
pub(crate) fn flag_s(a: S, b: S, c: S) -> R {
stable(longer(a, b), move |opts| opts.optflag(a, b, c))
}
pub(crate) fn flagmulti_s(a: S, b: S, c: S) -> R {
stable(longer(a, b), move |opts| opts.optflagmulti(a, b, c))
}
fn opt(a: S, b: S, c: S, d: S) -> R {
unstable(longer(a, b), move |opts| opts.optopt(a, b, c, d))
}
pub(crate) fn multi(a: S, b: S, c: S, d: S) -> R {
unstable(longer(a, b), move |opts| opts.optmulti(a, b, c, d))
pub fn make_opt(
stability: OptionStability,
kind: OptionKind,
short_name: &'static str,
long_name: &'static str,
desc: &'static str,
hint: &'static str,
) -> RustcOptGroup {
RustcOptGroup {
name: cmp::max_by_key(short_name, long_name, |s| s.len()),
stability,
apply: match kind {
OptionKind::Opt => Box::new(move |opts: &mut getopts::Options| {
opts.optopt(short_name, long_name, desc, hint)
}),
OptionKind::Multi => Box::new(move |opts: &mut getopts::Options| {
opts.optmulti(short_name, long_name, desc, hint)
}),
OptionKind::Flag => {
assert_eq!(hint, "");
Box::new(move |opts: &mut getopts::Options| {
opts.optflag(short_name, long_name, desc)
})
}
OptionKind::FlagMulti => {
assert_eq!(hint, "");
Box::new(move |opts: &mut getopts::Options| {
opts.optflagmulti(short_name, long_name, desc)
})
}
},
}
}
@ -1468,46 +1472,60 @@ pub(crate) fn multi(a: S, b: S, c: S, d: S) -> R {
/// including metadata for each option, such as whether the option is
/// part of the stable long-term interface for rustc.
pub fn rustc_short_optgroups() -> Vec<RustcOptGroup> {
use OptionKind::{Flag, FlagMulti, Multi, Opt};
use OptionStability::Stable;
use self::make_opt as opt;
vec![
opt::flag_s("h", "help", "Display this message"),
opt::multi_s("", "cfg", "Configure the compilation environment.
SPEC supports the syntax `NAME[=\"VALUE\"]`.", "SPEC"),
opt::multi_s("", "check-cfg", "Provide list of expected cfgs for checking", "SPEC"),
opt::multi_s(
opt(Stable, Flag, "h", "help", "Display this message", ""),
opt(
Stable,
Multi,
"",
"cfg",
"Configure the compilation environment.\n\
SPEC supports the syntax `NAME[=\"VALUE\"]`.",
"SPEC",
),
opt(Stable, Multi, "", "check-cfg", "Provide list of expected cfgs for checking", "SPEC"),
opt(
Stable,
Multi,
"L",
"",
"Add a directory to the library search path. The
optional KIND can be one of dependency, crate, native,
framework, or all (the default).",
"Add a directory to the library search path. \
The optional KIND can be one of dependency, crate, native, framework, or all (the default).",
"[KIND=]PATH",
),
opt::multi_s(
opt(
Stable,
Multi,
"l",
"",
"Link the generated crate(s) to the specified native
library NAME. The optional KIND can be one of
static, framework, or dylib (the default).
Optional comma separated MODIFIERS (bundle|verbatim|whole-archive|as-needed)
may be specified each with a prefix of either '+' to
enable or '-' to disable.",
"Link the generated crate(s) to the specified native\n\
library NAME. The optional KIND can be one of\n\
static, framework, or dylib (the default).\n\
Optional comma separated MODIFIERS\n\
(bundle|verbatim|whole-archive|as-needed)\n\
may be specified each with a prefix of either '+' to\n\
enable or '-' to disable.",
"[KIND[:MODIFIERS]=]NAME[:RENAME]",
),
make_crate_type_option(),
opt::opt_s("", "crate-name", "Specify the name of the crate being built", "NAME"),
opt::opt_s(
"",
"edition",
&EDITION_STRING,
EDITION_NAME_LIST,
),
opt::multi_s(
opt(Stable, Opt, "", "crate-name", "Specify the name of the crate being built", "NAME"),
opt(Stable, Opt, "", "edition", &EDITION_STRING, EDITION_NAME_LIST),
opt(
Stable,
Multi,
"",
"emit",
"Comma separated list of types of output for \
the compiler to emit",
"Comma separated list of types of output for the compiler to emit",
"[asm|llvm-bc|llvm-ir|obj|metadata|link|dep-info|mir]",
),
opt::multi_s(
opt(
Stable,
Multi,
"",
"print",
"Compiler information to print on stdout",
@ -1516,41 +1534,36 @@ pub fn rustc_short_optgroups() -> Vec<RustcOptGroup> {
tls-models|target-spec-json|all-target-specs-json|native-static-libs|\
stack-protector-strategies|link-args|deployment-target]",
),
opt::flagmulti_s("g", "", "Equivalent to -C debuginfo=2"),
opt::flagmulti_s("O", "", "Equivalent to -C opt-level=2"),
opt::opt_s("o", "", "Write output to <filename>", "FILENAME"),
opt::opt_s(
"",
"out-dir",
"Write output to compiler-chosen filename \
in <dir>",
"DIR",
),
opt::opt_s(
opt(Stable, FlagMulti, "g", "", "Equivalent to -C debuginfo=2", ""),
opt(Stable, FlagMulti, "O", "", "Equivalent to -C opt-level=2", ""),
opt(Stable, Opt, "o", "", "Write output to <filename>", "FILENAME"),
opt(Stable, Opt, "", "out-dir", "Write output to compiler-chosen filename in <dir>", "DIR"),
opt(
Stable,
Opt,
"",
"explain",
"Provide a detailed explanation of an error \
message",
"Provide a detailed explanation of an error message",
"OPT",
),
opt::flag_s("", "test", "Build a test harness"),
opt::opt_s("", "target", "Target triple for which the code is compiled", "TARGET"),
opt::multi_s("A", "allow", "Set lint allowed", "LINT"),
opt::multi_s("W", "warn", "Set lint warnings", "LINT"),
opt::multi_s("", "force-warn", "Set lint force-warn", "LINT"),
opt::multi_s("D", "deny", "Set lint denied", "LINT"),
opt::multi_s("F", "forbid", "Set lint forbidden", "LINT"),
opt::multi_s(
opt(Stable, Flag, "", "test", "Build a test harness", ""),
opt(Stable, Opt, "", "target", "Target triple for which the code is compiled", "TARGET"),
opt(Stable, Multi, "A", "allow", "Set lint allowed", "LINT"),
opt(Stable, Multi, "W", "warn", "Set lint warnings", "LINT"),
opt(Stable, Multi, "", "force-warn", "Set lint force-warn", "LINT"),
opt(Stable, Multi, "D", "deny", "Set lint denied", "LINT"),
opt(Stable, Multi, "F", "forbid", "Set lint forbidden", "LINT"),
opt(
Stable,
Multi,
"",
"cap-lints",
"Set the most restrictive lint level. \
More restrictive lints are capped at this \
level",
"Set the most restrictive lint level. More restrictive lints are capped at this level",
"LEVEL",
),
opt::multi_s("C", "codegen", "Set a codegen option", "OPT[=VALUE]"),
opt::flag_s("V", "version", "Print version info and exit"),
opt::flag_s("v", "verbose", "Use verbose output"),
opt(Stable, Multi, "C", "codegen", "Set a codegen option", "OPT[=VALUE]"),
opt(Stable, Flag, "V", "version", "Print version info and exit", ""),
opt(Stable, Flag, "v", "verbose", "Use verbose output", ""),
]
}
@ -1558,25 +1571,36 @@ pub fn rustc_short_optgroups() -> Vec<RustcOptGroup> {
/// each option, such as whether the option is part of the stable
/// long-term interface for rustc.
pub fn rustc_optgroups() -> Vec<RustcOptGroup> {
use OptionKind::{Multi, Opt};
use OptionStability::{Stable, Unstable};
use self::make_opt as opt;
let mut opts = rustc_short_optgroups();
// FIXME: none of these descriptions are actually used
opts.extend(vec![
opt::multi_s(
opt(
Stable,
Multi,
"",
"extern",
"Specify where an external rust library is located",
"NAME[=PATH]",
),
opt::opt_s("", "sysroot", "Override the system root", "PATH"),
opt::multi("Z", "", "Set unstable / perma-unstable options", "FLAG"),
opt::opt_s(
opt(Stable, Opt, "", "sysroot", "Override the system root", "PATH"),
opt(Unstable, Multi, "Z", "", "Set unstable / perma-unstable options", "FLAG"),
opt(
Stable,
Opt,
"",
"error-format",
"How errors and other messages are produced",
"human|json|short",
),
opt::multi_s("", "json", "Configure the JSON output of the compiler", "CONFIG"),
opt::opt_s(
opt(Stable, Multi, "", "json", "Configure the JSON output of the compiler", "CONFIG"),
opt(
Stable,
Opt,
"",
"color",
"Configure coloring of output:
@ -1585,19 +1609,23 @@ pub fn rustc_optgroups() -> Vec<RustcOptGroup> {
never = never colorize output",
"auto|always|never",
),
opt::opt_s(
opt(
Stable,
Opt,
"",
"diagnostic-width",
"Inform rustc of the width of the output so that diagnostics can be truncated to fit",
"WIDTH",
),
opt::multi_s(
opt(
Stable,
Multi,
"",
"remap-path-prefix",
"Remap source names in all output (compiler messages and output files)",
"FROM=TO",
),
opt::multi("", "env-set", "Inject an environment variable", "VAR=VALUE"),
opt(Unstable, Multi, "", "env-set", "Inject an environment variable", "VAR=VALUE"),
]);
opts
}
@ -2760,7 +2788,9 @@ fn parse_pretty(early_dcx: &EarlyDiagCtxt, unstable_opts: &UnstableOptions) -> O
}
pub fn make_crate_type_option() -> RustcOptGroup {
opt::multi_s(
make_opt(
OptionStability::Stable,
OptionKind::Multi,
"",
"crate-type",
"Comma separated list of types of crates