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util.rs
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util.rs
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// Copyright 2012-2013 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.
#[allow(dead_code)];
use std::cell::RefCell;
use std::libc;
use std::os;
use std::io;
use std::io::fs;
use extra::workcache;
use rustc::driver::{driver, session};
use extra::getopts::groups::getopts;
use syntax::ast_util::*;
use syntax::codemap::{dummy_sp, Spanned};
use syntax::ext::base::ExtCtxt;
use syntax::{ast, attr, codemap, diagnostic, fold, visit};
use syntax::attr::AttrMetaMethods;
use syntax::fold::ast_fold;
use syntax::visit::Visitor;
use syntax::util::small_vector::SmallVector;
use rustc::back::link::output_type_exe;
use rustc::back::link;
use context::{in_target, StopBefore, Link, Assemble, BuildContext};
use crate_id::CrateId;
use package_source::PkgSrc;
use workspace::pkg_parent_workspaces;
use path_util::{system_library, target_build_dir};
use path_util::{default_workspace, built_library_in_workspace};
pub use target::{OutputType, Main, Lib, Bench, Test, JustOne, lib_name_of, lib_crate_filename};
pub use target::{Target, Build, Install};
use extra::treemap::TreeMap;
pub use target::{lib_name_of, lib_crate_filename, WhatToBuild, MaybeCustom, Inferred};
use workcache_support::{digest_file_with_date, digest_only_date};
use messages::error;
// It would be nice to have the list of commands in just one place -- for example,
// you could update the match in rustpkg.rc but forget to update this list. I think
// that should be fixed.
static COMMANDS: &'static [&'static str] =
&["build", "clean", "do", "info", "init", "install", "list", "prefer", "test", "uninstall",
"unprefer"];
pub type ExitCode = int; // For now
pub struct Pkg {
id: CrateId,
bins: ~[~str],
libs: ~[~str],
}
impl ToStr for Pkg {
fn to_str(&self) -> ~str {
self.id.to_str()
}
}
pub fn is_cmd(cmd: &str) -> bool {
COMMANDS.iter().any(|&c| c == cmd)
}
struct ListenerFn {
cmds: ~[~str],
span: codemap::Span,
path: ~[ast::Ident]
}
struct ReadyCtx {
sess: session::Session,
ext_cx: ExtCtxt,
path: ~[ast::Ident],
fns: ~[ListenerFn]
}
fn fold_mod(_ctx: @mut ReadyCtx, m: &ast::_mod, fold: &mut CrateSetup)
-> ast::_mod {
fn strip_main(item: @ast::item) -> @ast::item {
@ast::item {
attrs: item.attrs.iter().filter_map(|attr| {
if "main" != attr.name() {
Some(*attr)
} else {
None
}
}).collect(),
.. (*item).clone()
}
}
fold::noop_fold_mod(&ast::_mod {
items: m.items.map(|item| strip_main(*item)),
.. (*m).clone()
}, fold)
}
fn fold_item(ctx: @mut ReadyCtx, item: @ast::item, fold: &mut CrateSetup)
-> SmallVector<@ast::item> {
ctx.path.push(item.ident);
let mut cmds = ~[];
let mut had_pkg_do = false;
for attr in item.attrs.iter() {
if "pkg_do" == attr.name() {
had_pkg_do = true;
match attr.node.value.node {
ast::MetaList(_, ref mis) => {
for mi in mis.iter() {
match mi.node {
ast::MetaWord(cmd) => cmds.push(cmd.to_owned()),
_ => {}
};
}
}
_ => cmds.push(~"build")
}
}
}
if had_pkg_do {
ctx.fns.push(ListenerFn {
cmds: cmds,
span: item.span,
path: /*bad*/ctx.path.clone()
});
}
let res = fold::noop_fold_item(item, fold);
ctx.path.pop();
res
}
struct CrateSetup {
ctx: @mut ReadyCtx,
}
impl fold::ast_fold for CrateSetup {
fn fold_item(&mut self, item: @ast::item) -> SmallVector<@ast::item> {
fold_item(self.ctx, item, self)
}
fn fold_mod(&mut self, module: &ast::_mod) -> ast::_mod {
fold_mod(self.ctx, module, self)
}
}
/// Generate/filter main function, add the list of commands, etc.
pub fn ready_crate(sess: session::Session,
crate: ast::Crate) -> ast::Crate {
let ctx = @mut ReadyCtx {
sess: sess,
ext_cx: ExtCtxt::new(sess.parse_sess, sess.opts.cfg.clone()),
path: ~[],
fns: ~[]
};
let mut fold = CrateSetup {
ctx: ctx,
};
fold.fold_crate(crate)
}
pub fn compile_input(context: &BuildContext,
exec: &mut workcache::Exec,
pkg_id: &CrateId,
in_file: &Path,
workspace: &Path,
deps: &mut DepMap,
flags: &[~str],
cfgs: &[~str],
opt: session::OptLevel,
what: OutputType) -> Option<Path> {
assert!(in_file.components().nth(1).is_some());
let input = driver::file_input(in_file.clone());
debug!("compile_input: {} / {:?}", in_file.display(), what);
// tjc: by default, use the package ID name as the link name
// not sure if we should support anything else
let mut out_dir = target_build_dir(workspace);
out_dir.push(&pkg_id.path);
// Make the output directory if it doesn't exist already
fs::mkdir_recursive(&out_dir, io::UserRWX);
let binary = os::args()[0].to_managed();
debug!("flags: {}", flags.connect(" "));
debug!("cfgs: {}", cfgs.connect(" "));
let csysroot = context.sysroot();
debug!("compile_input's sysroot = {}", csysroot.display());
let crate_type = match what {
Lib => session::OutputDylib,
Test | Bench | Main => session::OutputExecutable,
};
let matches = getopts(debug_flags()
+ match what {
Lib => ~[~"--lib"],
// --test compiles both #[test] and #[bench] fns
Test | Bench => ~[~"--test"],
Main => ~[]
}
+ flags
+ context.flag_strs()
+ cfgs.flat_map(|c| { ~[~"--cfg", (*c).clone()] }),
driver::optgroups()).unwrap();
debug!("rustc flags: {:?}", matches);
// Hack so that rustpkg can run either out of a rustc target dir,
// or the host dir
let sysroot_to_use = @if !in_target(&context.sysroot()) {
context.sysroot()
}
else {
let mut p = context.sysroot().clone();
p.pop();
p.pop();
p.pop();
p
};
let csysroot = context.sysroot();
debug!("compile_input's sysroot = {}", csysroot.display());
debug!("sysroot_to_use = {}", sysroot_to_use.display());
let output_type = match context.compile_upto() {
Assemble => link::output_type_assembly,
Link => link::output_type_object,
Pretty | Trans | Analysis => link::output_type_none,
LLVMAssemble => link::output_type_llvm_assembly,
LLVMCompileBitcode => link::output_type_bitcode,
Nothing => link::output_type_exe
};
debug!("Output type = {:?}", output_type);
let options = @session::options {
outputs: ~[crate_type],
optimize: opt,
test: what == Test || what == Bench,
maybe_sysroot: Some(sysroot_to_use),
addl_lib_search_paths:
@RefCell::new(context.additional_library_paths()),
output_type: output_type,
.. (*driver::build_session_options(binary,
&matches,
@diagnostic::DefaultEmitter as
@diagnostic::Emitter)).clone()
};
debug!("Created options...");
let addl_lib_search_paths = @RefCell::new(options.addl_lib_search_paths);
// Make sure all the library directories actually exist, since the linker will complain
// otherwise
{
let mut addl_lib_search_paths = addl_lib_search_paths.borrow_mut();
let addl_lib_search_paths = addl_lib_search_paths.get();
let mut addl_lib_search_paths = addl_lib_search_paths.borrow_mut();
for p in addl_lib_search_paths.get().iter() {
if p.exists() {
assert!(p.is_dir())
}
else {
fs::mkdir_recursive(p, io::UserRWX);
}
}
}
debug!("About to build session...");
let sess = driver::build_session(options,
@diagnostic::DefaultEmitter as
@diagnostic::Emitter);
debug!("About to build config...");
// Infer dependencies that rustpkg needs to build, by scanning for
// `extern mod` directives.
let cfg = driver::build_configuration(sess);
let mut crate = driver::phase_1_parse_input(sess, cfg.clone(), &input);
crate = driver::phase_2_configure_and_expand(sess, cfg.clone(), crate);
debug!("About to call find_and_install_dependencies...");
find_and_install_dependencies(context, pkg_id, in_file, sess, exec, &crate, deps,
|p| {
debug!("a dependency: {}", p.display());
let mut addl_lib_search_paths =
addl_lib_search_paths.borrow_mut();
let addl_lib_search_paths =
addl_lib_search_paths.get();
let mut addl_lib_search_paths =
addl_lib_search_paths.borrow_mut();
// Pass the directory containing a dependency
// as an additional lib search path
addl_lib_search_paths.get().insert(p);
});
// Inject the crate_id attribute so we get the right package name and version
if !attr::contains_name(crate.attrs, "crate_id") {
// FIXME (#9639): This needs to handle non-utf8 paths
let crateid_attr =
attr::mk_name_value_item_str(@"crate_id",
format!("{}\\#{}",
pkg_id.path.as_str().unwrap(),
pkg_id.version.to_str()).to_managed());
debug!("crateid attr: {:?}", crateid_attr);
crate.attrs.push(attr::mk_attr(crateid_attr));
}
debug!("calling compile_crate_from_input, workspace = {},
building_library = {:?}", out_dir.display(), sess.building_library);
let result = compile_crate_from_input(in_file,
exec,
context.compile_upto(),
&out_dir,
sess,
crate,
what);
// Discover the output
let discovered_output = if what == Lib {
built_library_in_workspace(pkg_id, workspace) // Huh???
}
else {
result
};
for p in discovered_output.iter() {
debug!("About to discover output {}", p.display());
if p.exists() {
debug!("4. discovering output {}", p.display());
// FIXME (#9639): This needs to handle non-utf8 paths
exec.discover_output("binary", p.as_str().unwrap(), digest_only_date(p));
}
// Nothing to do if it doesn't exist -- that could happen if we had the
// -S or -emit-llvm flags, etc.
}
discovered_output
}
// Should use workcache to avoid recompiling when not necessary
// Should also rename this to something better
// If crate_opt is present, then finish compilation. If it's None, then
// call compile_upto and return the crate
// also, too many arguments
// Returns list of discovered dependencies
pub fn compile_crate_from_input(input: &Path,
exec: &mut workcache::Exec,
stop_before: StopBefore,
// should be of the form <workspace>/build/<pkg id's path>
out_dir: &Path,
sess: session::Session,
// Returns None if one of the flags that suppresses compilation output was
// given
crate: ast::Crate,
what: OutputType) -> Option<Path> {
debug!("Calling build_output_filenames with {}, building library? {:?}",
out_dir.display(), sess.building_library);
// bad copy
debug!("out_dir = {}", out_dir.display());
let file_input = driver::file_input(input.clone());
let mut outputs = driver::build_output_filenames(&file_input,
&Some(out_dir.clone()), &None,
crate.attrs, sess);
match what {
Lib | Main => {}
Test => {
let mut ofile = outputs.out_filename.filename_str().unwrap().to_owned();
ofile.push_str("test");
outputs.out_filename.set_filename(ofile);
}
Bench => {
let mut ofile = outputs.out_filename.filename_str().unwrap().to_owned();
ofile.push_str("bench");
outputs.out_filename.set_filename(ofile);
}
};
debug!("Outputs are out_filename: {} and obj_filename: {} and output type = {:?}",
outputs.out_filename.display(),
outputs.obj_filename.display(),
sess.opts.output_type);
debug!("additional libraries:");
{
let addl_lib_search_paths = sess.opts.addl_lib_search_paths.borrow();
for lib in addl_lib_search_paths.get().iter() {
debug!("an additional library: {}", lib.display());
}
}
let analysis = driver::phase_3_run_analysis_passes(sess, &crate);
if driver::stop_after_phase_3(sess) { return None; }
let translation = driver::phase_4_translate_to_llvm(sess, crate,
&analysis,
outputs);
driver::phase_5_run_llvm_passes(sess, &translation, outputs);
// The second check shouldn't be necessary, but rustc seems to ignore
// -c
if driver::stop_after_phase_5(sess)
|| stop_before == Link || stop_before == Assemble { return Some(outputs.out_filename); }
driver::phase_6_link_output(sess, &translation, outputs);
// Register dependency on the source file
// FIXME (#9639): This needs to handle non-utf8 paths
exec.discover_input("file", input.as_str().unwrap(), digest_file_with_date(input));
debug!("Built {}, date = {:?}", outputs.out_filename.display(),
datestamp(&outputs.out_filename));
Some(outputs.out_filename)
}
#[cfg(windows)]
pub fn exe_suffix() -> ~str { ~".exe" }
#[cfg(target_os = "linux")]
#[cfg(target_os = "android")]
#[cfg(target_os = "freebsd")]
#[cfg(target_os = "macos")]
pub fn exe_suffix() -> ~str { ~"" }
// Called by build_crates
pub fn compile_crate(ctxt: &BuildContext,
exec: &mut workcache::Exec,
pkg_id: &CrateId,
crate: &Path,
workspace: &Path,
deps: &mut DepMap,
flags: &[~str],
cfgs: &[~str],
opt: session::OptLevel,
what: OutputType) -> Option<Path> {
debug!("compile_crate: crate={}, workspace={}", crate.display(), workspace.display());
debug!("compile_crate: short_name = {}, flags =...", pkg_id.to_str());
for fl in flags.iter() {
debug!("+++ {}", *fl);
}
compile_input(ctxt, exec, pkg_id, crate, workspace, deps, flags, cfgs, opt, what)
}
struct ViewItemVisitor<'a> {
context: &'a BuildContext,
parent: &'a CrateId,
parent_crate: &'a Path,
sess: session::Session,
exec: &'a mut workcache::Exec,
c: &'a ast::Crate,
save: 'a |Path|,
deps: &'a mut DepMap
}
impl<'a> Visitor<()> for ViewItemVisitor<'a> {
fn visit_view_item(&mut self, vi: &ast::view_item, env: ()) {
use conditions::nonexistent_package::cond;
match vi.node {
// ignore metadata, I guess
ast::view_item_extern_mod(lib_ident, path_opt, _, _) => {
let lib_name = match path_opt {
Some((p, _)) => p,
None => self.sess.str_of(lib_ident)
};
debug!("Finding and installing... {}", lib_name);
// Check standard Rust library path first
let whatever = system_library(&self.context.sysroot(), lib_name);
debug!("system library returned {:?}", whatever);
match whatever {
Some(ref installed_path) => {
debug!("It exists: {}", installed_path.display());
// Say that [path for c] has a discovered dependency on
// installed_path
// For binary files, we only hash the datestamp, not the contents.
// I'm not sure what the right thing is.
// Now we know that this crate has a discovered dependency on
// installed_path
// FIXME (#9639): This needs to handle non-utf8 paths
add_dep(self.deps, self.parent_crate.as_str().unwrap().to_owned(),
(~"binary", installed_path.as_str().unwrap().to_owned()));
self.exec.discover_input("binary",
installed_path.as_str().unwrap(),
digest_only_date(installed_path));
}
None => {
// FIXME #8711: need to parse version out of path_opt
debug!("Trying to install library {}, rebuilding it",
lib_name.to_str());
// Try to install it
let pkg_id = CrateId::new(lib_name);
// Find all the workspaces in the RUST_PATH that contain this package.
let workspaces = pkg_parent_workspaces(&self.context.context,
&pkg_id);
// Three cases:
// (a) `workspaces` is empty. That means there's no local source
// for this package. In that case, we pass the default workspace
// into `PkgSrc::new`, so that if it exists as a remote repository,
// its sources will be fetched into it. We also put the output in the
// same workspace.
// (b) We're using the Rust path hack. In that case, the output goes
// in the destination workspace.
// (c) `workspaces` is non-empty -- we found a local source for this
// package and will build in that workspace.
let (source_workspace, dest_workspace) = if workspaces.is_empty() {
(default_workspace(), default_workspace())
} else {
if self.context.context.use_rust_path_hack {
(workspaces[0], default_workspace())
} else {
(workspaces[0].clone(), workspaces[0])
}
};
// In this case, the source and destination workspaces are the same:
// Either it's a remote package, so the local sources don't exist
// and the `PkgSrc` constructor will detect that;
// or else it's already in a workspace and we'll build into that
// workspace
let pkg_src = cond.trap(|_| {
// Nonexistent package? Then print a better error
error(format!("Package {} depends on {}, but I don't know \
how to find it",
self.parent.path.display(),
pkg_id.path.display()));
fail!()
}).inside(|| {
PkgSrc::new(source_workspace.clone(),
dest_workspace.clone(),
// Use the rust_path_hack to search for dependencies iff
// we were already using it
self.context.context.use_rust_path_hack,
pkg_id.clone())
});
let (outputs_disc, inputs_disc) =
self.context.install(
pkg_src,
&WhatToBuild::new(Inferred,
JustOne(Path::new(lib_crate_filename))));
debug!("Installed {}, returned {:?} dependencies and \
{:?} transitive dependencies",
lib_name, outputs_disc.len(), inputs_disc.len());
debug!("discovered outputs = {:?} discovered_inputs = {:?}",
outputs_disc, inputs_disc);
// It must have installed *something*...
assert!(!outputs_disc.is_empty());
for dep in outputs_disc.iter() {
debug!("Discovering a binary input: {}", dep.display());
// FIXME (#9639): This needs to handle non-utf8 paths
self.exec.discover_input("binary",
dep.as_str().unwrap(),
digest_only_date(dep));
add_dep(self.deps,
self.parent_crate.as_str().unwrap().to_owned(),
(~"binary", dep.as_str().unwrap().to_owned()));
// Also, add an additional search path
let dep_dir = dep.dir_path();
debug!("Installed {} into {}", dep.display(), dep_dir.display());
(self.save)(dep_dir);
}
debug!("Installed {}, returned {} dependencies and \
{} transitive dependencies",
lib_name, outputs_disc.len(), inputs_disc.len());
// It must have installed *something*...
assert!(!outputs_disc.is_empty());
let mut target_workspace = outputs_disc[0].clone();
target_workspace.pop();
for &(ref what, ref dep) in inputs_disc.iter() {
if *what == ~"file" {
add_dep(self.deps,
self.parent_crate.as_str().unwrap().to_owned(),
(~"file", dep.clone()));
self.exec.discover_input(*what,
*dep,
digest_file_with_date(
&Path::new(dep.as_slice())));
} else if *what == ~"binary" {
add_dep(self.deps,
self.parent_crate.as_str().unwrap().to_owned(),
(~"binary", dep.clone()));
self.exec.discover_input(*what,
*dep,
digest_only_date(
&Path::new(dep.as_slice())));
} else {
fail!("Bad kind: {}", *what);
}
// Also, add an additional search path
debug!("Installed {} into {}",
lib_name, target_workspace.as_str().unwrap().to_owned());
(self.save)(target_workspace.clone());
}
}
}
}
// Ignore `use`s
_ => ()
}
visit::walk_view_item(self, vi, env)
}
}
/// Collect all `extern mod` directives in `c`, then
/// try to install their targets, failing if any target
/// can't be found.
pub fn find_and_install_dependencies(context: &BuildContext,
parent: &CrateId,
parent_crate: &Path,
sess: session::Session,
exec: &mut workcache::Exec,
c: &ast::Crate,
deps: &mut DepMap,
save: |Path|) {
debug!("In find_and_install_dependencies...");
let mut visitor = ViewItemVisitor {
context: context,
parent: parent,
parent_crate: parent_crate,
sess: sess,
exec: exec,
c: c,
save: save,
deps: deps
};
visit::walk_crate(&mut visitor, c, ())
}
pub fn mk_string_lit(s: @str) -> ast::lit {
Spanned {
node: ast::lit_str(s, ast::CookedStr),
span: dummy_sp()
}
}
#[cfg(test)]
mod test {
use super::is_cmd;
#[test]
fn test_is_cmd() {
assert!(is_cmd("build"));
assert!(is_cmd("clean"));
assert!(is_cmd("do"));
assert!(is_cmd("info"));
assert!(is_cmd("install"));
assert!(is_cmd("prefer"));
assert!(is_cmd("test"));
assert!(is_cmd("uninstall"));
assert!(is_cmd("unprefer"));
}
}
pub fn option_to_vec<T>(x: Option<T>) -> ~[T] {
match x {
Some(y) => ~[y],
None => ~[]
}
}
// tjc: cheesy
fn debug_flags() -> ~[~str] { ~[] }
// static DEBUG_FLAGS: ~[~str] = ~[~"-Z", ~"time-passes"];
/// Returns the last-modified date as an Option
pub fn datestamp(p: &Path) -> Option<libc::time_t> {
debug!("Scrutinizing datestamp for {} - does it exist? {:?}", p.display(),
p.exists());
match io::result(|| p.stat()) {
Ok(s) => {
let out = s.modified;
debug!("Date = {:?}", out);
Some(out as libc::time_t)
}
Err(..) => None,
}
}
pub type DepMap = TreeMap<~str, ~[(~str, ~str)]>;
/// Records a dependency from `parent` to the kind and value described by `info`,
/// in `deps`
fn add_dep(deps: &mut DepMap, parent: ~str, info: (~str, ~str)) {
let mut done = false;
let info_clone = info.clone();
match deps.find_mut(&parent) {
None => { }
Some(v) => { done = true; (*v).push(info) }
};
if !done {
deps.insert(parent, ~[info_clone]);
}
}