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Auto merge of #21876 - nick29581:driver-args, r=huonw

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This allows people to write tools which are drop-in replacements for rustc by implementing `CompilerCalls` and three lines of code, rather than having to copy+paste a bunch of args parsing code.

r? @alexcrichton
This commit is contained in:
bors 2015-02-09 19:01:37 +00:00
commit 134e00be77
6 changed files with 447 additions and 196 deletions
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21
src/librustc/session/config.rs
View File

@ -33,9 +33,10 @@ use syntax::diagnostic::{ColorConfig, Auto, Always, Never, SpanHandler};
use syntax::parse;
use syntax::parse::token::InternedString;
use getopts;
use std::collections::HashMap;
use std::collections::hash_map::Entry::{Occupied, Vacant};
use getopts;
use std::env;
use std::fmt;
use llvm;
@ -821,7 +822,6 @@ pub fn parse_cfgspecs(cfgspecs: Vec<String> ) -> ast::CrateConfig {
}
pub fn build_session_options(matches: &getopts::Matches) -> Options {
let unparsed_crate_types = matches.opt_strs("crate-type");
let crate_types = parse_crate_types_from_list(unparsed_crate_types)
.unwrap_or_else(|e| early_error(&e[]));
@ -1041,7 +1041,22 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
crate_name: crate_name,
alt_std_name: None,
libs: libs,
unstable_features: UnstableFeatures::Disallow
unstable_features: get_unstable_features_setting(),
}
}
pub fn get_unstable_features_setting() -> UnstableFeatures {
// Whether this is a feature-staged build, i.e. on the beta or stable channel
let disable_unstable_features = option_env!("CFG_DISABLE_UNSTABLE_FEATURES").is_some();
// The secret key needed to get through the rustc build itself by
// subverting the unstable features lints
let bootstrap_secret_key = option_env!("CFG_BOOTSTRAP_KEY");
// The matching key to the above, only known by the build system
let bootstrap_provided_key = env::var_string("RUSTC_BOOTSTRAP_KEY").ok();
match (disable_unstable_features, bootstrap_secret_key, bootstrap_provided_key) {
(_, Some(ref s), Some(ref p)) if s == p => UnstableFeatures::Cheat,
(true, _, _) => UnstableFeatures::Disallow,
(false, _, _) => UnstableFeatures::Default
}
}

9
src/librustc_driver/driver.rs
View File

@ -1,4 +1,4 @@
// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
@ -27,6 +27,7 @@ use rustc_trans::back::write;
use rustc_trans::trans;
use rustc_typeck as typeck;
use rustc_privacy;
use super::Compilation;
use serialize::json;
@ -55,7 +56,7 @@ pub fn compile_input(sess: Session,
let state = $make_state;
(control.$point.callback)(state);
}
if control.$point.stop {
if control.$point.stop == Compilation::Stop {
return;
}
})}
@ -206,14 +207,14 @@ impl<'a> CompileController<'a> {
}
pub struct PhaseController<'a> {
pub stop: bool,
pub stop: Compilation,
pub callback: Box<Fn(CompileState) -> () + 'a>,
}
impl<'a> PhaseController<'a> {
pub fn basic() -> PhaseController<'a> {
PhaseController {
stop: false,
stop: Compilation::Continue,
callback: box |_| {},
}
}

525
src/librustc_driver/lib.rs
View File

@ -1,4 +1,4 @@
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
@ -60,12 +60,13 @@ extern crate "rustc_llvm" as llvm;
pub use syntax::diagnostic;
use driver::CompileController;
use pretty::{PpMode, UserIdentifiedItem};
use rustc_resolve as resolve;
use rustc_trans::back::link;
use rustc_trans::save;
use rustc::session::{config, Session, build_session};
use rustc::session::config::{Input, PrintRequest, UnstableFeatures};
use rustc::session::config::{Input, PrintRequest};
use rustc::lint::Lint;
use rustc::lint;
use rustc::metadata;
@ -92,95 +93,59 @@ pub mod test;
pub mod driver;
pub mod pretty;
pub fn run(args: Vec<String>) -> int {
monitor(move || run_compiler(&args));
0
}
static BUG_REPORT_URL: &'static str =
"http://doc.rust-lang.org/complement-bugreport.html";
fn run_compiler(args: &[String]) {
pub fn run(args: Vec<String>) -> int {
monitor(move || run_compiler(&args, &mut RustcDefaultCalls));
0
}
// Parse args and run the compiler. This is the primary entry point for rustc.
// See comments on CompilerCalls below for details about the callbacks argument.
pub fn run_compiler<'a>(args: &[String],
callbacks: &mut CompilerCalls<'a>) {
macro_rules! do_or_return {($expr: expr) => {
match $expr {
Compilation::Stop => return,
Compilation::Continue => {}
}
}}
let matches = match handle_options(args.to_vec()) {
Some(matches) => matches,
None => return
};
let descriptions = diagnostics_registry();
match matches.opt_str("explain") {
Some(ref code) => {
match descriptions.find_description(&code[]) {
Some(ref description) => {
println!("{}", description);
}
None => {
early_error(&format!("no extended information for {}", code)[]);
}
}
return;
},
None => ()
}
do_or_return!(callbacks.early_callback(&matches, &descriptions));
let sopts = config::build_session_options(&matches);
let odir = matches.opt_str("out-dir").map(|o| Path::new(o));
let ofile = matches.opt_str("o").map(|o| Path::new(o));
let (input, input_file_path) = match matches.free.len() {
0 => {
if sopts.describe_lints {
let mut ls = lint::LintStore::new();
ls.register_builtin(None);
describe_lints(&ls, false);
return;
}
let sess = build_session(sopts, None, descriptions);
if print_crate_info(&sess, None, &odir, &ofile) {
return;
}
early_error("no input filename given");
}
1 => {
let ifile = &matches.free[0][];
if ifile == "-" {
let contents = old_io::stdin().read_to_end().unwrap();
let src = String::from_utf8(contents).unwrap();
(Input::Str(src), None)
} else {
(Input::File(Path::new(ifile)), Some(Path::new(ifile)))
}
}
_ => early_error("multiple input filenames provided")
};
let mut sopts = sopts;
sopts.unstable_features = get_unstable_features_setting();
let (odir, ofile) = make_output(&matches);
let (input, input_file_path) = match make_input(&matches.free[]) {
Some((input, input_file_path)) => callbacks.some_input(input, input_file_path),
None => match callbacks.no_input(&matches, &sopts, &odir, &ofile, &descriptions) {
Some((input, input_file_path)) => (input, input_file_path),
None => return
}
};
let mut sess = build_session(sopts, input_file_path, descriptions);
let cfg = config::build_configuration(&sess);
if print_crate_info(&sess, Some(&input), &odir, &ofile) {
return
if sess.unstable_options() {
sess.opts.show_span = matches.opt_str("show-span");
}
let cfg = config::build_configuration(&sess);
let pretty = if sess.opts.debugging_opts.unstable_options {
matches.opt_default("pretty", "normal").map(|a| {
// stable pretty-print variants only
pretty::parse_pretty(&sess, &a, false)
})
} else {
None
};
let pretty = if pretty.is_none() &&
sess.unstable_options() {
matches.opt_str("xpretty").map(|a| {
// extended with unstable pretty-print variants
pretty::parse_pretty(&sess, &a, true)
})
} else {
pretty
};
do_or_return!(callbacks.late_callback(&matches, &sess, &input, &odir, &ofile));
match pretty.into_iter().next() {
// It is somewhat unfortunate that this is hardwired in - this is forced by
// the fact that pretty_print_input requires the session by value.
let pretty = callbacks.parse_pretty(&sess, &matches);
match pretty {
Some((ppm, opt_uii)) => {
pretty::pretty_print_input(sess, cfg, &input, ppm, opt_uii, ofile);
return;
@ -188,76 +153,313 @@ fn run_compiler(args: &[String]) {
None => {/* continue */ }
}
if sess.unstable_options() {
sess.opts.show_span = matches.opt_str("show-span");
}
let r = matches.opt_strs("Z");
if r.contains(&("ls".to_string())) {
match input {
Input::File(ref ifile) => {
let mut stdout = old_io::stdout();
list_metadata(&sess, &(*ifile), &mut stdout).unwrap();
}
Input::Str(_) => {
early_error("cannot list metadata for stdin");
}
}
return;
}
let plugins = sess.opts.debugging_opts.extra_plugins.clone();
let control = build_controller(&sess);
let control = callbacks.build_controller(&sess);
driver::compile_input(sess, cfg, &input, &odir, &ofile, Some(plugins), control);
}
fn build_controller<'a>(sess: &Session) -> CompileController<'a> {
let mut control = CompileController::basic();
if sess.opts.parse_only ||
sess.opts.show_span.is_some() ||
sess.opts.debugging_opts.ast_json_noexpand {
control.after_parse.stop = true;
}
if sess.opts.no_analysis || sess.opts.debugging_opts.ast_json {
control.after_write_deps.stop = true;
}
if sess.opts.no_trans {
control.after_analysis.stop = true;
}
if !sess.opts.output_types.iter().any(|&i| i == config::OutputTypeExe) {
control.after_llvm.stop = true;
}
if sess.opts.debugging_opts.save_analysis {
control.after_analysis.callback = box |state| {
time(state.session.time_passes(), "save analysis", state.krate.unwrap(), |krate|
save::process_crate(state.session,
krate,
state.analysis.unwrap(),
state.out_dir));
};
control.make_glob_map = resolve::MakeGlobMap::Yes;
}
control
// Extract output directory and file from matches.
fn make_output(matches: &getopts::Matches) -> (Option<Path>, Option<Path>) {
let odir = matches.opt_str("out-dir").map(|o| Path::new(o));
let ofile = matches.opt_str("o").map(|o| Path::new(o));
(odir, ofile)
}
pub fn get_unstable_features_setting() -> UnstableFeatures {
// Whether this is a feature-staged build, i.e. on the beta or stable channel
let disable_unstable_features = option_env!("CFG_DISABLE_UNSTABLE_FEATURES").is_some();
// The secret key needed to get through the rustc build itself by
// subverting the unstable features lints
let bootstrap_secret_key = option_env!("CFG_BOOTSTRAP_KEY");
// The matching key to the above, only known by the build system
let bootstrap_provided_key = env::var_string("RUSTC_BOOTSTRAP_KEY").ok();
match (disable_unstable_features, bootstrap_secret_key, bootstrap_provided_key) {
(_, Some(ref s), Some(ref p)) if s == p => UnstableFeatures::Cheat,
(true, _, _) => UnstableFeatures::Disallow,
(false, _, _) => UnstableFeatures::Default
// Extract input (string or file and optional path) from matches.
fn make_input(free_matches: &[String]) -> Option<(Input, Option<Path>)> {
if free_matches.len() == 1 {
let ifile = &free_matches[0][];
if ifile == "-" {
let contents = old_io::stdin().read_to_end().unwrap();
let src = String::from_utf8(contents).unwrap();
Some((Input::Str(src), None))
} else {
Some((Input::File(Path::new(ifile)), Some(Path::new(ifile))))
}
} else {
None
}
}
// Whether to stop or continue compilation.
#[derive(Copy, Debug, Eq, PartialEq)]
pub enum Compilation {
Stop,
Continue,
}
impl Compilation {
pub fn and_then<F: FnOnce() -> Compilation>(self, next: F) -> Compilation {
match self {
Compilation::Stop => Compilation::Stop,
Compilation::Continue => next()
}
}
}
// A trait for customising the compilation process. Offers a number of hooks for
// executing custom code or customising input.
pub trait CompilerCalls<'a> {
// Hook for a callback early in the process of handling arguments. This will
// be called straight after options have been parsed but before anything
// else (e.g., selecting input and output).
fn early_callback(&mut self,
&getopts::Matches,
&diagnostics::registry::Registry)
-> Compilation;
// Hook for a callback late in the process of handling arguments. This will
// be called just before actual compilation starts (and before build_controller
// is called), after all arguments etc. have been completely handled.
fn late_callback(&mut self,
&getopts::Matches,
&Session,
&Input,
&Option<Path>,
&Option<Path>)
-> Compilation;
// Called after we extract the input from the arguments. Gives the implementer
// an opportunity to change the inputs or to add some custom input handling.
// The default behaviour is to simply pass through the inputs.
fn some_input(&mut self, input: Input, input_path: Option<Path>) -> (Input, Option<Path>) {
(input, input_path)
}
// Called after we extract the input from the arguments if there is no valid
// input. Gives the implementer an opportunity to supply alternate input (by
// returning a Some value) or to add custom behaviour for this error such as
// emitting error messages. Returning None will cause compilation to stop
// at this point.
fn no_input(&mut self,
&getopts::Matches,
&config::Options,
&Option<Path>,
&Option<Path>,
&diagnostics::registry::Registry)
-> Option<(Input, Option<Path>)>;
// Parse pretty printing information from the arguments. The implementer can
// choose to ignore this (the default will return None) which will skip pretty
// printing. If you do want to pretty print, it is recommended to use the
// implementation of this method from RustcDefaultCalls.
// FIXME, this is a terrible bit of API. Parsing of pretty printing stuff
// should be done as part of the framework and the implementor should customise
// handling of it. However, that is not possible atm because pretty printing
// essentially goes off and takes another path through the compiler which
// means the session is either moved or not depending on what parse_pretty
// returns (we could fix this by cloning, but it's another hack). The proper
// solution is to handle pretty printing as if it were a compiler extension,
// extending CompileController to make this work (see for example the treatment
// of save-analysis in RustcDefaultCalls::build_controller).
fn parse_pretty(&mut self,
_sess: &Session,
_matches: &getopts::Matches)
-> Option<(PpMode, Option<UserIdentifiedItem>)> {
None
}
// Create a CompilController struct for controlling the behaviour of compilation.
fn build_controller(&mut self, &Session) -> CompileController<'a>;
}
// CompilerCalls instance for a regular rustc build.
#[derive(Copy)]
pub struct RustcDefaultCalls;
impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
fn early_callback(&mut self,
matches: &getopts::Matches,
descriptions: &diagnostics::registry::Registry)
-> Compilation {
match matches.opt_str("explain") {
Some(ref code) => {
match descriptions.find_description(&code[]) {
Some(ref description) => {
println!("{}", description);
}
None => {
early_error(&format!("no extended information for {}", code)[]);
}
}
return Compilation::Stop;
},
None => ()
}
return Compilation::Continue;
}
fn no_input(&mut self,
matches: &getopts::Matches,
sopts: &config::Options,
odir: &Option<Path>,
ofile: &Option<Path>,
descriptions: &diagnostics::registry::Registry)
-> Option<(Input, Option<Path>)> {
match matches.free.len() {
0 => {
if sopts.describe_lints {
let mut ls = lint::LintStore::new();
ls.register_builtin(None);
describe_lints(&ls, false);
return None;
}
let sess = build_session(sopts.clone(), None, descriptions.clone());
let should_stop = RustcDefaultCalls::print_crate_info(&sess, None, odir, ofile);
if should_stop == Compilation::Stop {
return None;
}
early_error("no input filename given");
}
1 => panic!("make_input should have provided valid inputs"),
_ => early_error("multiple input filenames provided")
}
None
}
fn parse_pretty(&mut self,
sess: &Session,
matches: &getopts::Matches)
-> Option<(PpMode, Option<UserIdentifiedItem>)> {
let pretty = if sess.opts.debugging_opts.unstable_options {
matches.opt_default("pretty", "normal").map(|a| {
// stable pretty-print variants only
pretty::parse_pretty(sess, &a, false)
})
} else {
None
};
if pretty.is_none() && sess.unstable_options() {
matches.opt_str("xpretty").map(|a| {
// extended with unstable pretty-print variants
pretty::parse_pretty(sess, &a, true)
})
} else {
pretty
}
}
fn late_callback(&mut self,
matches: &getopts::Matches,
sess: &Session,
input: &Input,
odir: &Option<Path>,
ofile: &Option<Path>)
-> Compilation {
RustcDefaultCalls::print_crate_info(sess, Some(input), odir, ofile).and_then(
|| RustcDefaultCalls::list_metadata(sess, matches, input))
}
fn build_controller(&mut self, sess: &Session) -> CompileController<'a> {
let mut control = CompileController::basic();
if sess.opts.parse_only ||
sess.opts.show_span.is_some() ||
sess.opts.debugging_opts.ast_json_noexpand {
control.after_parse.stop = Compilation::Stop;
}
if sess.opts.no_analysis || sess.opts.debugging_opts.ast_json {
control.after_write_deps.stop = Compilation::Stop;
}
if sess.opts.no_trans {
control.after_analysis.stop = Compilation::Stop;
}
if !sess.opts.output_types.iter().any(|&i| i == config::OutputTypeExe) {
control.after_llvm.stop = Compilation::Stop;
}
if sess.opts.debugging_opts.save_analysis {
control.after_analysis.callback = box |state| {
time(state.session.time_passes(), "save analysis", state.krate.unwrap(), |krate|
save::process_crate(state.session,
krate,
state.analysis.unwrap(),
state.out_dir));
};
control.make_glob_map = resolve::MakeGlobMap::Yes;
}
control
}
}
impl RustcDefaultCalls {
pub fn list_metadata(sess: &Session,
matches: &getopts::Matches,
input: &Input)
-> Compilation {
let r = matches.opt_strs("Z");
if r.contains(&("ls".to_string())) {
match input {
&Input::File(ref ifile) => {
let mut stdout = old_io::stdout();
let path = &(*ifile);
metadata::loader::list_file_metadata(sess.target.target.options.is_like_osx,
path,
&mut stdout).unwrap();
}
&Input::Str(_) => {
early_error("cannot list metadata for stdin");
}
}
return Compilation::Stop;
}
return Compilation::Continue;
}
fn print_crate_info(sess: &Session,
input: Option<&Input>,
odir: &Option<Path>,
ofile: &Option<Path>)
-> Compilation {
if sess.opts.prints.len() == 0 {
return Compilation::Continue;
}
let attrs = input.map(|input| parse_crate_attrs(sess, input));
for req in &sess.opts.prints {
match *req {
PrintRequest::Sysroot => println!("{}", sess.sysroot().display()),
PrintRequest::FileNames |
PrintRequest::CrateName => {
let input = match input {
Some(input) => input,
None => early_error("no input file provided"),
};
let attrs = attrs.as_ref().unwrap();
let t_outputs = driver::build_output_filenames(input,
odir,
ofile,
attrs,
sess);
let id = link::find_crate_name(Some(sess),
attrs,
input);
if *req == PrintRequest::CrateName {
println!("{}", id);
continue
}
let crate_types = driver::collect_crate_types(sess, attrs);
let metadata = driver::collect_crate_metadata(sess, attrs);
*sess.crate_metadata.borrow_mut() = metadata;
for &style in &crate_types {
let fname = link::filename_for_input(sess,
style,
&id,
&t_outputs.with_extension(""));
println!("{}", fname.filename_display());
}
}
}
}
return Compilation::Stop;
}
}
@ -535,50 +737,6 @@ pub fn handle_options(mut args: Vec<String>) -> Option<getopts::Matches> {
Some(matches)
}
fn print_crate_info(sess: &Session,
input: Option<&Input>,
odir: &Option<Path>,
ofile: &Option<Path>)
-> bool {
if sess.opts.prints.len() == 0 { return false }
let attrs = input.map(|input| parse_crate_attrs(sess, input));
for req in &sess.opts.prints {
match *req {
PrintRequest::Sysroot => println!("{}", sess.sysroot().display()),
PrintRequest::FileNames |
PrintRequest::CrateName => {
let input = match input {
Some(input) => input,
None => early_error("no input file provided"),
};
let attrs = attrs.as_ref().unwrap();
let t_outputs = driver::build_output_filenames(input,
odir,
ofile,
attrs,
sess);
let id = link::find_crate_name(Some(sess), attrs,
input);
if *req == PrintRequest::CrateName {
println!("{}", id);
continue
}
let crate_types = driver::collect_crate_types(sess, attrs);
let metadata = driver::collect_crate_metadata(sess, attrs);
*sess.crate_metadata.borrow_mut() = metadata;
for &style in &crate_types {
let fname = link::filename_for_input(sess, style,
&id,
&t_outputs.with_extension(""));
println!("{}", fname.filename_display());
}
}
}
}
return true;
}
fn parse_crate_attrs(sess: &Session, input: &Input) ->
Vec<ast::Attribute> {
let result = match *input {
@ -598,11 +756,6 @@ fn parse_crate_attrs(sess: &Session, input: &Input) ->
result.into_iter().collect()
}
pub fn list_metadata(sess: &Session, path: &Path,
out: &mut old_io::Writer) -> old_io::IoResult<()> {
metadata::loader::list_file_metadata(sess.target.target.options.is_like_osx, path, out)
}
/// Run a procedure which will detect panics in the compiler and print nicer
/// error messages rather than just failing the test.
///

6
src/librustdoc/test.rs
View File

@ -21,9 +21,9 @@ use std::thunk::Thunk;
use std::collections::{HashSet, HashMap};
use testing;
use rustc::session::{self, config};
use rustc::session::config::get_unstable_features_setting;
use rustc::session::search_paths::{SearchPaths, PathKind};
use rustc_driver::get_unstable_features_setting;
use rustc_driver::driver;
use rustc_driver::{driver, Compilation};
use syntax::ast;
use syntax::codemap::{CodeMap, dummy_spanned};
use syntax::diagnostic;
@ -178,7 +178,7 @@ fn runtest(test: &str, cratename: &str, libs: SearchPaths,
let libdir = sess.target_filesearch(PathKind::All).get_lib_path();
let mut control = driver::CompileController::basic();
if no_run {
control.after_analysis.stop = true;
control.after_analysis.stop = Compilation::Stop;
}
driver::compile_input(sess, cfg, &input, &out, &None, None, control);

1
src/libsyntax/diagnostics/registry.rs
View File

@ -10,6 +10,7 @@
use std::collections::HashMap;
#[derive(Clone)]
pub struct Registry {
descriptions: HashMap<&'static str, &'static str>
}

81
src/test/run-pass-fulldeps/compiler-calls.rs Normal file
View File

@ -0,0 +1,81 @@
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Test that the CompilerCalls interface to the compiler works.
// ignore-android
#![feature(rustc_private)]
#![feature(core)]
extern crate getopts;
extern crate rustc;
extern crate rustc_driver;
extern crate syntax;
use rustc::session::Session;
use rustc::session::config::{self, Input};
use rustc_driver::{driver, CompilerCalls, Compilation};
use syntax::diagnostics;
struct TestCalls {
count: u32
}
impl<'a> CompilerCalls<'a> for TestCalls {
fn early_callback(&mut self,
_: &getopts::Matches,
_: &diagnostics::registry::Registry)
-> Compilation {
self.count *= 2;
Compilation::Continue
}
fn late_callback(&mut self,
_: &getopts::Matches,
_: &Session,
_: &Input,
_: &Option<Path>,
_: &Option<Path>)
-> Compilation {
self.count *= 3;
Compilation::Stop
}
fn some_input(&mut self, input: Input, input_path: Option<Path>) -> (Input, Option<Path>) {
self.count *= 5;
(input, input_path)
}
fn no_input(&mut self,
_: &getopts::Matches,
_: &config::Options,
_: &Option<Path>,
_: &Option<Path>,
_: &diagnostics::registry::Registry)
-> Option<(Input, Option<Path>)> {
panic!("This shouldn't happen");
}
fn build_controller(&mut self, _: &Session) -> driver::CompileController<'a> {
panic!("This shouldn't be called");
}
}
fn main() {
let mut tc = TestCalls { count: 1 };
// we should never get use this filename, but lets make sure they are valid args.
let args = vec!["compiler-calls".to_string(), "foo.rs".to_string()];
rustc_driver::run_compiler(args.as_slice(), &mut tc);
assert!(tc.count == 30);
}