fn add_to_sysroot(out_dir: &Path, sysroot_dst: &Path) {
    // Collect the set of all files in the dependencies directory, keyed
    // off the name of the library. We assume everything is of the form
    // `foo-<hash>.{rlib,so,...}`, and there could be multiple different
    // `<hash>` values for the same name (of old builds).
    let mut map = HashMap::new();
    for file in t!(fs::read_dir(out_dir.join("deps"))).map(|f| t!(f)) {
        let filename = file.file_name().into_string().unwrap();

        // We're only interested in linking rlibs + dylibs, other things like
        // unit tests don't get linked in
        if !filename.ends_with(".rlib") &&
           !filename.ends_with(".lib") &&
           !is_dylib(&filename) {
            continue
        }
        let file = file.path();
        let dash = filename.find("-").unwrap();
        let key = (filename[..dash].to_string(),
                   file.extension().unwrap().to_owned());
        map.entry(key).or_insert(Vec::new())
           .push(file.clone());
    }

    // For all hash values found, pick the most recent one to move into the
    // sysroot, that should be the one we just built.
    for (_, paths) in map {
        let (_, path) = paths.iter().map(|path| {
            (mtime(&path).seconds(), path)
        }).max().unwrap();
        copy(&path, &sysroot_dst.join(path.file_name().unwrap()));
    }
}
/// Link some files into a rustc sysroot.
///
/// For a particular stage this will link all of the contents of `out_dir`
/// into the sysroot of the `host` compiler, assuming the artifacts are
/// compiled for the specified `target`.
Link some files into a rustc sysroot.
Link some files into a rustc sysroot .
fn add_to_sysroot(out_dir: &Path, sysroot_dst: &Path) {
    // Collect the set of all files in the dependencies directory, keyed
    // off the name of the library. We assume everything is of the form
    // `foo-<hash>.{rlib,so,...}`, and there could be multiple different
    // `<hash>` values for the same name (of old builds).
    let mut map = HashMap::new();
    for file in t!(fs::read_dir(out_dir.join("deps"))).map(|f| t!(f)) {
        let filename = file.file_name().into_string().unwrap();
        // We're only interested in linking rlibs + dylibs, other things like
        // unit tests don't get linked in
        if !filename.ends_with(".rlib") &&
           !filename.ends_with(".lib") &&
           !is_dylib(&filename) {
            continue
        }
        let file = file.path();
        let dash = filename.find("-").unwrap();
        let key = (filename[..dash].to_string(),
                   file.extension().unwrap().to_owned());
        map.entry(key).or_insert(Vec::new())
           .push(file.clone());
    }
    // For all hash values found, pick the most recent one to move into the
    // sysroot, that should be the one we just built.
    for (_, paths) in map {
        let (_, path) = paths.iter().map(|path| {
            (mtime(&path).seconds(), path)
        }).max().unwrap();
        copy(&path, &sysroot_dst.join(path.file_name().unwrap()));
    }
}
fn add_to_sysroot ( out_dir : & Path , sysroot_dst : & Path ) { // Collect the set of all files in the dependencies directory, keyed // off the name of the library. We assume everything is of the form // `foo-<hash>.{rlib,so,...}`, and there could be multiple different // `<hash>` values for the same name (of old builds). let mut map = HashMap :: new ( ) ; for file in t ! ( fs read_dir ( out_dir join ( " " ) ) ) . map ( | f | t ! ( f ) ) { let filename = file . file_name ( ) . into_string ( ) . unwrap ( ) ; // We're only interested in linking rlibs + dylibs, other things like // unit tests don't get linked in if ! filename . ends_with ( " " ) && ! filename . ends_with ( " " ) && ! is_dylib ( & filename ) { continue } let file = file . path ( ) ; let dash = filename . find ( " " ) . unwrap ( ) ; let key = ( filename [ .. dash ] . to_string ( ) , file . extension ( ) . unwrap ( ) . to_owned ( ) ) ; map . entry ( key ) . or_insert ( Vec :: new ( ) ) . push ( file . clone ( ) ) ; } // For all hash values found, pick the most recent one to move into the // sysroot, that should be the one we just built. for ( _ , paths ) in map { let ( _ , path ) = paths . iter ( ) . map ( | path | { ( mtime ( & path ) . seconds ( ) , path ) } ) . max ( ) . unwrap ( ) ; copy ( & path , & sysroot_dst . join ( path . file_name ( ) . unwrap ( ) ) ) ; } }
Link some files into a rustc sysroot.
Link some files into a rustc sysroot .
out_dir
&Path
sysroot_dst
&Path
out_dir
&Path
sysroot_dst
&Path