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|
use std::fs::File;
use std::path::{Path, PathBuf};
use rustc_codegen_ssa::back::archive::{ArchiveBuilder, ArchiveBuilderBuilder};
use rustc_session::Session;
use rustc_session::cstore::DllImport;
struct ArchiveConfig<'a> {
sess: &'a Session,
use_native_ar: bool,
use_gnu_style_archive: bool,
}
#[derive(Debug)]
enum ArchiveEntry {
FromArchive {
archive_index: usize,
entry_index: usize,
},
File(PathBuf),
}
pub struct ArArchiveBuilderBuilder;
impl ArchiveBuilderBuilder for ArArchiveBuilderBuilder {
fn new_archive_builder<'a>(&self, sess: &'a Session) -> Box<dyn ArchiveBuilder<'a> + 'a> {
let config = ArchiveConfig {
sess,
use_native_ar: false,
// FIXME test for linux and System V derivatives instead
use_gnu_style_archive: sess.target.options.archive_format == "gnu",
};
Box::new(ArArchiveBuilder {
config,
src_archives: vec![],
entries: vec![],
})
}
fn create_dll_import_lib(
&self,
_sess: &Session,
_lib_name: &str,
_dll_imports: &[DllImport],
_tmpdir: &Path,
) -> PathBuf {
unimplemented!();
}
}
pub struct ArArchiveBuilder<'a> {
config: ArchiveConfig<'a>,
src_archives: Vec<(PathBuf, ar::Archive<File>)>,
// Don't use `HashMap` here, as the order is important. `rust.metadata.bin` must always be at
// the end of an archive for linkers to not get confused.
entries: Vec<(String, ArchiveEntry)>,
}
impl<'a> ArchiveBuilder<'a> for ArArchiveBuilder<'a> {
fn add_file(&mut self, file: &Path) {
self.entries.push((
file.file_name().unwrap().to_str().unwrap().to_string(),
ArchiveEntry::File(file.to_owned()),
));
}
fn add_archive(
&mut self,
archive_path: &Path,
mut skip: Box<dyn FnMut(&str) -> bool + 'static>,
) -> std::io::Result<()> {
let mut archive = ar::Archive::new(std::fs::File::open(&archive_path)?);
let archive_index = self.src_archives.len();
let mut i = 0;
while let Some(entry) = archive.next_entry() {
let entry = entry?;
let file_name = String::from_utf8(entry.header().identifier().to_vec())
.map_err(|err| std::io::Error::new(std::io::ErrorKind::InvalidData, err))?;
if !skip(&file_name) {
self.entries
.push((file_name, ArchiveEntry::FromArchive { archive_index, entry_index: i }));
}
i += 1;
}
self.src_archives.push((archive_path.to_owned(), archive));
Ok(())
}
fn build(mut self: Box<Self>, output: &Path) -> bool {
use std::process::Command;
fn add_file_using_ar(archive: &Path, file: &Path) {
Command::new("ar")
.arg("r") // add or replace file
.arg("-c") // silence created file message
.arg(archive)
.arg(&file)
.status()
.unwrap();
}
enum BuilderKind<'a> {
Bsd(ar::Builder<File>),
Gnu(ar::GnuBuilder<File>),
NativeAr(&'a Path),
}
let mut builder = if self.config.use_native_ar {
BuilderKind::NativeAr(output)
} else if self.config.use_gnu_style_archive {
BuilderKind::Gnu(ar::GnuBuilder::new(
File::create(output).unwrap(),
self.entries
.iter()
.map(|(name, _)| name.as_bytes().to_vec())
.collect(),
))
} else {
BuilderKind::Bsd(ar::Builder::new(File::create(output).unwrap()))
};
let any_members = !self.entries.is_empty();
// Add all files
for (entry_name, entry) in self.entries.into_iter() {
match entry {
ArchiveEntry::FromArchive {
archive_index,
entry_index,
} => {
let (ref src_archive_path, ref mut src_archive) =
self.src_archives[archive_index];
let entry = src_archive.jump_to_entry(entry_index).unwrap();
let header = entry.header().clone();
match builder {
BuilderKind::Bsd(ref mut builder) => {
builder.append(&header, entry).unwrap()
}
BuilderKind::Gnu(ref mut builder) => {
builder.append(&header, entry).unwrap()
}
BuilderKind::NativeAr(archive_file) => {
Command::new("ar")
.arg("x")
.arg(src_archive_path)
.arg(&entry_name)
.status()
.unwrap();
add_file_using_ar(archive_file, Path::new(&entry_name));
std::fs::remove_file(entry_name).unwrap();
}
}
}
ArchiveEntry::File(file) =>
match builder {
BuilderKind::Bsd(ref mut builder) => {
builder
.append_file(entry_name.as_bytes(), &mut File::open(file).expect("file for bsd builder"))
.unwrap()
},
BuilderKind::Gnu(ref mut builder) => {
builder
.append_file(entry_name.as_bytes(), &mut File::open(&file).expect(&format!("file {:?} for gnu builder", file)))
.unwrap()
},
BuilderKind::NativeAr(archive_file) => add_file_using_ar(archive_file, &file),
},
}
}
// Finalize archive
std::mem::drop(builder);
// Run ranlib to be able to link the archive
let status =
std::process::Command::new("ranlib").arg(output).status().expect("Couldn't run ranlib");
if !status.success() {
self.config.sess.fatal(&format!("Ranlib exited with code {:?}", status.code()));
}
any_members
}
}
|
