787 lines
28 KiB
Rust
787 lines
28 KiB
Rust
// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use back::link;
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use back::write;
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use driver::session::Session;
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use driver::config;
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use front;
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use lint;
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use llvm::{ContextRef, ModuleRef};
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use metadata::common::LinkMeta;
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use metadata::creader;
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use middle::{trans, freevars, stability, kind, ty, typeck, reachable};
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use middle::dependency_format;
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use middle;
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use plugin::load::Plugins;
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use plugin::registry::Registry;
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use plugin;
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use util::common::time;
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use util::nodemap::{NodeSet};
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use serialize::{json, Encodable};
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use std::io;
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use std::io::fs;
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use syntax::ast;
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use syntax::attr;
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use syntax::attr::{AttrMetaMethods};
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use syntax::diagnostics;
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use syntax::parse;
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use syntax::parse::token;
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use syntax;
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pub fn host_triple() -> &'static str {
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// Get the host triple out of the build environment. This ensures that our
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// idea of the host triple is the same as for the set of libraries we've
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// actually built. We can't just take LLVM's host triple because they
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// normalize all ix86 architectures to i386.
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//
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// Instead of grabbing the host triple (for the current host), we grab (at
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// compile time) the target triple that this rustc is built with and
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// calling that (at runtime) the host triple.
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(option_env!("CFG_COMPILER_HOST_TRIPLE")).
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expect("CFG_COMPILER_HOST_TRIPLE")
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}
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pub fn compile_input(sess: Session,
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cfg: ast::CrateConfig,
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input: &Input,
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outdir: &Option<Path>,
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output: &Option<Path>,
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addl_plugins: Option<Plugins>) {
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// We need nested scopes here, because the intermediate results can keep
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// large chunks of memory alive and we want to free them as soon as
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// possible to keep the peak memory usage low
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let (outputs, trans, sess) = {
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let (outputs, expanded_crate, ast_map, id) = {
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let krate = phase_1_parse_input(&sess, cfg, input);
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if stop_after_phase_1(&sess) { return; }
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let outputs = build_output_filenames(input,
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outdir,
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output,
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krate.attrs.as_slice(),
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&sess);
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let id = link::find_crate_name(Some(&sess), krate.attrs.as_slice(),
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input);
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let (expanded_crate, ast_map)
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= match phase_2_configure_and_expand(&sess, krate, id.as_slice(),
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addl_plugins) {
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None => return,
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Some(p) => p,
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};
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(outputs, expanded_crate, ast_map, id)
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};
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write_out_deps(&sess, input, &outputs, id.as_slice());
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if stop_after_phase_2(&sess) { return; }
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let analysis = phase_3_run_analysis_passes(sess, &expanded_crate,
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ast_map, id);
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phase_save_analysis(&analysis.ty_cx.sess, &expanded_crate, &analysis, outdir);
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if stop_after_phase_3(&analysis.ty_cx.sess) { return; }
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let (tcx, trans) = phase_4_translate_to_llvm(expanded_crate, analysis);
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// Discard interned strings as they are no longer required.
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token::get_ident_interner().clear();
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(outputs, trans, tcx.sess)
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};
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phase_5_run_llvm_passes(&sess, &trans, &outputs);
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if stop_after_phase_5(&sess) { return; }
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phase_6_link_output(&sess, &trans, &outputs);
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}
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/**
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* The name used for source code that doesn't originate in a file
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* (e.g. source from stdin or a string)
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*/
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pub fn anon_src() -> String {
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"<anon>".to_string()
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}
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pub fn source_name(input: &Input) -> String {
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match *input {
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// FIXME (#9639): This needs to handle non-utf8 paths
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FileInput(ref ifile) => ifile.as_str().unwrap().to_string(),
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StrInput(_) => anon_src()
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}
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}
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pub enum Input {
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/// Load source from file
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FileInput(Path),
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/// The string is the source
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StrInput(String)
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}
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impl Input {
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fn filestem(&self) -> String {
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match *self {
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FileInput(ref ifile) => ifile.filestem_str().unwrap().to_string(),
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StrInput(_) => "rust_out".to_string(),
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}
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}
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}
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pub fn phase_1_parse_input(sess: &Session, cfg: ast::CrateConfig, input: &Input)
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-> ast::Crate {
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let krate = time(sess.time_passes(), "parsing", (), |_| {
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match *input {
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FileInput(ref file) => {
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parse::parse_crate_from_file(&(*file), cfg.clone(), &sess.parse_sess)
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}
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StrInput(ref src) => {
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parse::parse_crate_from_source_str(anon_src().to_string(),
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src.to_string(),
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cfg.clone(),
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&sess.parse_sess)
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}
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}
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});
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if sess.opts.debugging_opts & config::AST_JSON_NOEXPAND != 0 {
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let mut stdout = io::BufferedWriter::new(io::stdout());
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let mut json = json::PrettyEncoder::new(&mut stdout);
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// unwrapping so IoError isn't ignored
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krate.encode(&mut json).unwrap();
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}
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if sess.show_span() {
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front::show_span::run(sess, &krate);
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}
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krate
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}
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// For continuing compilation after a parsed crate has been
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// modified
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/// Run the "early phases" of the compiler: initial `cfg` processing,
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/// loading compiler plugins (including those from `addl_plugins`),
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/// syntax expansion, secondary `cfg` expansion, synthesis of a test
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/// harness if one is to be provided and injection of a dependency on the
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/// standard library and prelude.
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///
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/// Returns `None` if we're aborting after handling -W help.
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pub fn phase_2_configure_and_expand(sess: &Session,
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mut krate: ast::Crate,
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crate_name: &str,
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addl_plugins: Option<Plugins>)
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-> Option<(ast::Crate, syntax::ast_map::Map)> {
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let time_passes = sess.time_passes();
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*sess.crate_types.borrow_mut() =
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collect_crate_types(sess, krate.attrs.as_slice());
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*sess.crate_metadata.borrow_mut() =
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collect_crate_metadata(sess, krate.attrs.as_slice());
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time(time_passes, "gated feature checking", (), |_|
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front::feature_gate::check_crate(sess, &krate));
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krate = time(time_passes, "crate injection", krate, |krate|
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front::std_inject::maybe_inject_crates_ref(sess, krate));
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// strip before expansion to allow macros to depend on
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// configuration variables e.g/ in
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//
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// #[macro_escape] #[cfg(foo)]
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// mod bar { macro_rules! baz!(() => {{}}) }
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//
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// baz! should not use this definition unless foo is enabled.
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krate = time(time_passes, "configuration 1", krate, |krate|
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front::config::strip_unconfigured_items(krate));
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let mut addl_plugins = Some(addl_plugins);
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let Plugins { macros, registrars }
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= time(time_passes, "plugin loading", (), |_|
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plugin::load::load_plugins(sess, &krate, addl_plugins.take().unwrap()));
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let mut registry = Registry::new(&krate);
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time(time_passes, "plugin registration", (), |_| {
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if sess.features.rustc_diagnostic_macros.get() {
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registry.register_macro("__diagnostic_used",
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diagnostics::plugin::expand_diagnostic_used);
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registry.register_macro("__register_diagnostic",
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diagnostics::plugin::expand_register_diagnostic);
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registry.register_macro("__build_diagnostic_array",
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diagnostics::plugin::expand_build_diagnostic_array);
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}
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for ®istrar in registrars.iter() {
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registrar(&mut registry);
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}
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});
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let Registry { syntax_exts, lint_passes, lint_groups, .. } = registry;
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{
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let mut ls = sess.lint_store.borrow_mut();
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for pass in lint_passes.move_iter() {
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ls.register_pass(Some(sess), true, pass);
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}
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for (name, to) in lint_groups.move_iter() {
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ls.register_group(Some(sess), true, name, to);
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}
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}
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// Lint plugins are registered; now we can process command line flags.
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if sess.opts.describe_lints {
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super::describe_lints(&*sess.lint_store.borrow(), true);
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return None;
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}
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sess.lint_store.borrow_mut().process_command_line(sess);
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// Abort if there are errors from lint processing or a plugin registrar.
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sess.abort_if_errors();
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krate = time(time_passes, "expansion", (krate, macros, syntax_exts),
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|(krate, macros, syntax_exts)| {
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// Windows dlls do not have rpaths, so they don't know how to find their
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// dependencies. It's up to us to tell the system where to find all the
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// dependent dlls. Note that this uses cfg!(windows) as opposed to
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// targ_cfg because syntax extensions are always loaded for the host
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// compiler, not for the target.
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if cfg!(windows) {
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sess.host_filesearch().add_dylib_search_paths();
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}
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let cfg = syntax::ext::expand::ExpansionConfig {
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deriving_hash_type_parameter: sess.features.default_type_params.get(),
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crate_name: crate_name.to_string(),
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};
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syntax::ext::expand::expand_crate(&sess.parse_sess,
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cfg,
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macros,
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syntax_exts,
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krate)
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}
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);
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// JBC: make CFG processing part of expansion to avoid this problem:
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// strip again, in case expansion added anything with a #[cfg].
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krate = time(time_passes, "configuration 2", krate, |krate|
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front::config::strip_unconfigured_items(krate));
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krate = time(time_passes, "maybe building test harness", krate, |krate|
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front::test::modify_for_testing(sess, krate));
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krate = time(time_passes, "prelude injection", krate, |krate|
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front::std_inject::maybe_inject_prelude(sess, krate));
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let (krate, map) = time(time_passes, "assigning node ids and indexing ast", krate, |krate|
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front::assign_node_ids_and_map::assign_node_ids_and_map(sess, krate));
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if sess.opts.debugging_opts & config::AST_JSON != 0 {
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let mut stdout = io::BufferedWriter::new(io::stdout());
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let mut json = json::PrettyEncoder::new(&mut stdout);
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// unwrapping so IoError isn't ignored
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krate.encode(&mut json).unwrap();
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}
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time(time_passes, "checking that all macro invocations are gone", &krate, |krate|
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syntax::ext::expand::check_for_macros(&sess.parse_sess, krate));
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Some((krate, map))
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}
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pub struct CrateAnalysis {
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pub exp_map2: middle::resolve::ExportMap2,
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pub exported_items: middle::privacy::ExportedItems,
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pub public_items: middle::privacy::PublicItems,
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pub ty_cx: ty::ctxt,
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pub reachable: NodeSet,
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pub name: String,
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}
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/// Run the resolution, typechecking, region checking and other
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/// miscellaneous analysis passes on the crate. Return various
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/// structures carrying the results of the analysis.
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pub fn phase_3_run_analysis_passes(sess: Session,
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krate: &ast::Crate,
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ast_map: syntax::ast_map::Map,
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name: String) -> CrateAnalysis {
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let time_passes = sess.time_passes();
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time(time_passes, "external crate/lib resolution", (), |_|
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creader::read_crates(&sess, krate));
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let lang_items = time(time_passes, "language item collection", (), |_|
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middle::lang_items::collect_language_items(krate, &sess));
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let middle::resolve::CrateMap {
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def_map: def_map,
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exp_map2: exp_map2,
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trait_map: trait_map,
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external_exports: external_exports,
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last_private_map: last_private_map
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} =
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time(time_passes, "resolution", (), |_|
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middle::resolve::resolve_crate(&sess, &lang_items, krate));
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// Discard MTWT tables that aren't required past resolution.
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syntax::ext::mtwt::clear_tables();
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let named_region_map = time(time_passes, "lifetime resolution", (),
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|_| middle::resolve_lifetime::krate(&sess, krate));
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time(time_passes, "looking for entry point", (),
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|_| middle::entry::find_entry_point(&sess, krate, &ast_map));
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sess.plugin_registrar_fn.set(
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time(time_passes, "looking for plugin registrar", (), |_|
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plugin::build::find_plugin_registrar(
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sess.diagnostic(), krate)));
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let (freevars, capture_modes) =
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time(time_passes, "freevar finding", (), |_|
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freevars::annotate_freevars(&def_map, krate));
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let region_map = time(time_passes, "region resolution", (), |_|
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middle::region::resolve_crate(&sess, krate));
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time(time_passes, "loop checking", (), |_|
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middle::check_loop::check_crate(&sess, krate));
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let stability_index = time(time_passes, "stability index", (), |_|
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stability::Index::build(krate));
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let ty_cx = ty::mk_ctxt(sess,
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def_map,
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named_region_map,
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ast_map,
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freevars,
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capture_modes,
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region_map,
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lang_items,
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stability_index);
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// passes are timed inside typeck
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typeck::check_crate(&ty_cx, trait_map, krate);
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time(time_passes, "check static items", (), |_|
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middle::check_static::check_crate(&ty_cx, krate));
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// These next two const passes can probably be merged
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time(time_passes, "const marking", (), |_|
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middle::const_eval::process_crate(krate, &ty_cx));
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time(time_passes, "const checking", (), |_|
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middle::check_const::check_crate(krate, &ty_cx));
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let maps = (external_exports, last_private_map);
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let (exported_items, public_items) =
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time(time_passes, "privacy checking", maps, |(a, b)|
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middle::privacy::check_crate(&ty_cx, &exp_map2, a, b, krate));
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time(time_passes, "intrinsic checking", (), |_|
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middle::intrinsicck::check_crate(&ty_cx, krate));
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time(time_passes, "effect checking", (), |_|
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middle::effect::check_crate(&ty_cx, krate));
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time(time_passes, "match checking", (), |_|
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middle::check_match::check_crate(&ty_cx, krate));
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time(time_passes, "liveness checking", (), |_|
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middle::liveness::check_crate(&ty_cx, krate));
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time(time_passes, "borrow checking", (), |_|
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middle::borrowck::check_crate(&ty_cx, krate));
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time(time_passes, "rvalue checking", (), |_|
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middle::check_rvalues::check_crate(&ty_cx, krate));
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time(time_passes, "kind checking", (), |_|
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kind::check_crate(&ty_cx, krate));
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let reachable_map =
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time(time_passes, "reachability checking", (), |_|
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reachable::find_reachable(&ty_cx, &exported_items));
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time(time_passes, "death checking", (), |_| {
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middle::dead::check_crate(&ty_cx,
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&exported_items,
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&reachable_map,
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krate)
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});
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time(time_passes, "lint checking", (), |_|
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lint::check_crate(&ty_cx, krate, &exported_items));
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CrateAnalysis {
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exp_map2: exp_map2,
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ty_cx: ty_cx,
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exported_items: exported_items,
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public_items: public_items,
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reachable: reachable_map,
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name: name,
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}
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}
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pub fn phase_save_analysis(sess: &Session,
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krate: &ast::Crate,
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analysis: &CrateAnalysis,
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odir: &Option<Path>) {
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if (sess.opts.debugging_opts & config::SAVE_ANALYSIS) == 0 {
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return;
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}
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time(sess.time_passes(), "save analysis", krate, |krate|
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middle::save::process_crate(sess, krate, analysis, odir));
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}
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pub struct ModuleTranslation {
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pub llcx: ContextRef,
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pub llmod: ModuleRef,
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}
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pub struct CrateTranslation {
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pub modules: Vec<ModuleTranslation>,
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pub metadata_module: ModuleTranslation,
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pub link: LinkMeta,
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pub metadata: Vec<u8>,
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pub reachable: Vec<String>,
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pub crate_formats: dependency_format::Dependencies,
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pub no_builtins: bool,
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}
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|
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/// Run the translation phase to LLVM, after which the AST and analysis can
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/// be discarded.
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pub fn phase_4_translate_to_llvm(krate: ast::Crate,
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analysis: CrateAnalysis) -> (ty::ctxt, CrateTranslation) {
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let time_passes = analysis.ty_cx.sess.time_passes();
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time(time_passes, "resolving dependency formats", (), |_|
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dependency_format::calculate(&analysis.ty_cx));
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|
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// Option dance to work around the lack of stack once closures.
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time(time_passes, "translation", (krate, analysis), |(krate, analysis)|
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trans::base::trans_crate(krate, analysis))
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}
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/// Run LLVM itself, producing a bitcode file, assembly file or object file
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/// as a side effect.
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pub fn phase_5_run_llvm_passes(sess: &Session,
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trans: &CrateTranslation,
|
|
outputs: &OutputFilenames) {
|
|
if sess.opts.cg.no_integrated_as {
|
|
let output_type = write::OutputTypeAssembly;
|
|
|
|
time(sess.time_passes(), "LLVM passes", (), |_|
|
|
write::run_passes(sess, trans, [output_type], outputs));
|
|
|
|
write::run_assembler(sess, outputs);
|
|
|
|
// Remove assembly source, unless --save-temps was specified
|
|
if !sess.opts.cg.save_temps {
|
|
fs::unlink(&outputs.temp_path(write::OutputTypeAssembly)).unwrap();
|
|
}
|
|
} else {
|
|
time(sess.time_passes(), "LLVM passes", (), |_|
|
|
write::run_passes(sess,
|
|
trans,
|
|
sess.opts.output_types.as_slice(),
|
|
outputs));
|
|
}
|
|
}
|
|
|
|
/// Run the linker on any artifacts that resulted from the LLVM run.
|
|
/// This should produce either a finished executable or library.
|
|
pub fn phase_6_link_output(sess: &Session,
|
|
trans: &CrateTranslation,
|
|
outputs: &OutputFilenames) {
|
|
time(sess.time_passes(), "linking", (), |_|
|
|
link::link_binary(sess,
|
|
trans,
|
|
outputs,
|
|
trans.link.crate_name.as_slice()));
|
|
}
|
|
|
|
pub fn stop_after_phase_3(sess: &Session) -> bool {
|
|
if sess.opts.no_trans {
|
|
debug!("invoked with --no-trans, returning early from compile_input");
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
pub fn stop_after_phase_1(sess: &Session) -> bool {
|
|
if sess.opts.parse_only {
|
|
debug!("invoked with --parse-only, returning early from compile_input");
|
|
return true;
|
|
}
|
|
if sess.show_span() {
|
|
return true;
|
|
}
|
|
return sess.opts.debugging_opts & config::AST_JSON_NOEXPAND != 0;
|
|
}
|
|
|
|
pub fn stop_after_phase_2(sess: &Session) -> bool {
|
|
if sess.opts.no_analysis {
|
|
debug!("invoked with --no-analysis, returning early from compile_input");
|
|
return true;
|
|
}
|
|
return sess.opts.debugging_opts & config::AST_JSON != 0;
|
|
}
|
|
|
|
pub fn stop_after_phase_5(sess: &Session) -> bool {
|
|
if !sess.opts.output_types.iter().any(|&i| i == write::OutputTypeExe) {
|
|
debug!("not building executable, returning early from compile_input");
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
fn write_out_deps(sess: &Session,
|
|
input: &Input,
|
|
outputs: &OutputFilenames,
|
|
id: &str) {
|
|
|
|
let mut out_filenames = Vec::new();
|
|
for output_type in sess.opts.output_types.iter() {
|
|
let file = outputs.path(*output_type);
|
|
match *output_type {
|
|
write::OutputTypeExe => {
|
|
for output in sess.crate_types.borrow().iter() {
|
|
let p = link::filename_for_input(sess, *output,
|
|
id, &file);
|
|
out_filenames.push(p);
|
|
}
|
|
}
|
|
_ => { out_filenames.push(file); }
|
|
}
|
|
}
|
|
|
|
// Write out dependency rules to the dep-info file if requested with
|
|
// --dep-info
|
|
let deps_filename = match sess.opts.write_dependency_info {
|
|
// Use filename from --dep-file argument if given
|
|
(true, Some(ref filename)) => filename.clone(),
|
|
// Use default filename: crate source filename with extension replaced
|
|
// by ".d"
|
|
(true, None) => match *input {
|
|
FileInput(..) => outputs.with_extension("d"),
|
|
StrInput(..) => {
|
|
sess.warn("can not write --dep-info without a filename \
|
|
when compiling stdin.");
|
|
return
|
|
},
|
|
},
|
|
_ => return,
|
|
};
|
|
|
|
let result = (|| {
|
|
// Build a list of files used to compile the output and
|
|
// write Makefile-compatible dependency rules
|
|
let files: Vec<String> = sess.codemap().files.borrow()
|
|
.iter().filter(|fmap| fmap.is_real_file())
|
|
.map(|fmap| fmap.name.to_string())
|
|
.collect();
|
|
let mut file = try!(io::File::create(&deps_filename));
|
|
for path in out_filenames.iter() {
|
|
try!(write!(&mut file as &mut Writer,
|
|
"{}: {}\n\n", path.display(), files.connect(" ")));
|
|
}
|
|
Ok(())
|
|
})();
|
|
|
|
match result {
|
|
Ok(()) => {}
|
|
Err(e) => {
|
|
sess.fatal(format!("error writing dependencies to `{}`: {}",
|
|
deps_filename.display(), e).as_slice());
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn collect_crate_types(session: &Session,
|
|
attrs: &[ast::Attribute]) -> Vec<config::CrateType> {
|
|
// Unconditionally collect crate types from attributes to make them used
|
|
let attr_types: Vec<config::CrateType> = attrs.iter().filter_map(|a| {
|
|
if a.check_name("crate_type") {
|
|
match a.value_str() {
|
|
Some(ref n) if n.equiv(&("rlib")) => {
|
|
Some(config::CrateTypeRlib)
|
|
}
|
|
Some(ref n) if n.equiv(&("dylib")) => {
|
|
Some(config::CrateTypeDylib)
|
|
}
|
|
Some(ref n) if n.equiv(&("lib")) => {
|
|
Some(config::default_lib_output())
|
|
}
|
|
Some(ref n) if n.equiv(&("staticlib")) => {
|
|
Some(config::CrateTypeStaticlib)
|
|
}
|
|
Some(ref n) if n.equiv(&("bin")) => Some(config::CrateTypeExecutable),
|
|
Some(_) => {
|
|
session.add_lint(lint::builtin::UNKNOWN_CRATE_TYPE,
|
|
ast::CRATE_NODE_ID,
|
|
a.span,
|
|
"invalid `crate_type` \
|
|
value".to_string());
|
|
None
|
|
}
|
|
_ => {
|
|
session.add_lint(lint::builtin::UNKNOWN_CRATE_TYPE,
|
|
ast::CRATE_NODE_ID,
|
|
a.span,
|
|
"`crate_type` requires a \
|
|
value".to_string());
|
|
None
|
|
}
|
|
}
|
|
} else {
|
|
None
|
|
}
|
|
}).collect();
|
|
|
|
// If we're generating a test executable, then ignore all other output
|
|
// styles at all other locations
|
|
if session.opts.test {
|
|
return vec!(config::CrateTypeExecutable)
|
|
}
|
|
|
|
// Only check command line flags if present. If no types are specified by
|
|
// command line, then reuse the empty `base` Vec to hold the types that
|
|
// will be found in crate attributes.
|
|
let mut base = session.opts.crate_types.clone();
|
|
if base.len() == 0 {
|
|
base.extend(attr_types.move_iter());
|
|
if base.len() == 0 {
|
|
base.push(link::default_output_for_target(session));
|
|
}
|
|
base.as_mut_slice().sort();
|
|
base.dedup();
|
|
}
|
|
|
|
base.move_iter().filter(|crate_type| {
|
|
let res = !link::invalid_output_for_target(session, *crate_type);
|
|
|
|
if !res {
|
|
session.warn(format!("dropping unsupported crate type `{}` \
|
|
for target os `{}`",
|
|
*crate_type, session.targ_cfg.os).as_slice());
|
|
}
|
|
|
|
res
|
|
}).collect()
|
|
}
|
|
|
|
pub fn collect_crate_metadata(session: &Session,
|
|
_attrs: &[ast::Attribute]) -> Vec<String> {
|
|
session.opts.cg.metadata.clone()
|
|
}
|
|
|
|
#[deriving(Clone)]
|
|
pub struct OutputFilenames {
|
|
pub out_directory: Path,
|
|
pub out_filestem: String,
|
|
pub single_output_file: Option<Path>,
|
|
extra: String,
|
|
}
|
|
|
|
impl OutputFilenames {
|
|
pub fn path(&self, flavor: write::OutputType) -> Path {
|
|
match self.single_output_file {
|
|
Some(ref path) => return path.clone(),
|
|
None => {}
|
|
}
|
|
self.temp_path(flavor)
|
|
}
|
|
|
|
pub fn temp_path(&self, flavor: write::OutputType) -> Path {
|
|
let base = self.out_directory.join(self.filestem());
|
|
match flavor {
|
|
write::OutputTypeBitcode => base.with_extension("bc"),
|
|
write::OutputTypeAssembly => base.with_extension("s"),
|
|
write::OutputTypeLlvmAssembly => base.with_extension("ll"),
|
|
write::OutputTypeObject => base.with_extension("o"),
|
|
write::OutputTypeExe => base,
|
|
}
|
|
}
|
|
|
|
pub fn with_extension(&self, extension: &str) -> Path {
|
|
self.out_directory.join(self.filestem()).with_extension(extension)
|
|
}
|
|
|
|
fn filestem(&self) -> String {
|
|
format!("{}{}", self.out_filestem, self.extra)
|
|
}
|
|
}
|
|
|
|
pub fn build_output_filenames(input: &Input,
|
|
odir: &Option<Path>,
|
|
ofile: &Option<Path>,
|
|
attrs: &[ast::Attribute],
|
|
sess: &Session)
|
|
-> OutputFilenames {
|
|
match *ofile {
|
|
None => {
|
|
// "-" as input file will cause the parser to read from stdin so we
|
|
// have to make up a name
|
|
// We want to toss everything after the final '.'
|
|
let dirpath = match *odir {
|
|
Some(ref d) => d.clone(),
|
|
None => Path::new(".")
|
|
};
|
|
|
|
// If a crate name is present, we use it as the link name
|
|
let stem = sess.opts.crate_name.clone().or_else(|| {
|
|
attr::find_crate_name(attrs).map(|n| n.get().to_string())
|
|
}).or_else(|| {
|
|
// NB: this clause can be removed once #[crate_id] is no longer
|
|
// deprecated.
|
|
//
|
|
// Also note that this will be warned about later so we don't
|
|
// warn about it here.
|
|
use syntax::crateid::CrateId;
|
|
attrs.iter().find(|at| at.check_name("crate_id"))
|
|
.and_then(|at| at.value_str())
|
|
.and_then(|s| from_str::<CrateId>(s.get()))
|
|
.map(|id| id.name)
|
|
}).unwrap_or(input.filestem());
|
|
|
|
OutputFilenames {
|
|
out_directory: dirpath,
|
|
out_filestem: stem,
|
|
single_output_file: None,
|
|
extra: sess.opts.cg.extra_filename.clone(),
|
|
}
|
|
}
|
|
|
|
Some(ref out_file) => {
|
|
let ofile = if sess.opts.output_types.len() > 1 {
|
|
sess.warn("ignoring specified output filename because multiple \
|
|
outputs were requested");
|
|
None
|
|
} else {
|
|
Some(out_file.clone())
|
|
};
|
|
if *odir != None {
|
|
sess.warn("ignoring --out-dir flag due to -o flag.");
|
|
}
|
|
OutputFilenames {
|
|
out_directory: out_file.dir_path(),
|
|
out_filestem: out_file.filestem_str().unwrap().to_string(),
|
|
single_output_file: ofile,
|
|
extra: sess.opts.cg.extra_filename.clone(),
|
|
}
|
|
}
|
|
}
|
|
}
|