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// A module for searching for libraries
// FIXME: I'm not happy how this module turned out. Should probably
// just be folded into cstore.
import core::option;
import std::fs;
import vec;
import std::os;
import result;
import std::generic_os;
export filesearch;
export mk_filesearch;
export pick;
export pick_file;
export search;
export relative_target_lib_path;
export get_cargo_root;
export libdir;
type pick<T> = block(path: fs::path) -> option::t<T>;
fn pick_file(file: fs::path, path: fs::path) -> option::t<fs::path> {
if fs::basename(path) == file { option::some(path) }
else { option::none }
}
iface filesearch {
fn sysroot() -> fs::path;
fn lib_search_paths() -> [fs::path];
fn get_target_lib_path() -> fs::path;
fn get_target_lib_file_path(file: fs::path) -> fs::path;
}
fn mk_filesearch(maybe_sysroot: option::t<fs::path>,
target_triple: str,
addl_lib_search_paths: [fs::path]) -> filesearch {
type filesearch_impl = {sysroot: fs::path,
addl_lib_search_paths: [fs::path],
target_triple: str};
impl of filesearch for filesearch_impl {
fn sysroot() -> fs::path { self.sysroot }
fn lib_search_paths() -> [fs::path] {
self.addl_lib_search_paths
+ [make_target_lib_path(self.sysroot, self.target_triple)]
+ alt get_cargo_lib_path() {
result::ok(p) { [p] }
result::err(p) { [] }
}
}
fn get_target_lib_path() -> fs::path {
make_target_lib_path(self.sysroot, self.target_triple)
}
fn get_target_lib_file_path(file: fs::path) -> fs::path {
fs::connect(self.get_target_lib_path(), file)
}
}
let sysroot = get_sysroot(maybe_sysroot);
#debug("using sysroot = %s", sysroot);
{sysroot: sysroot,
addl_lib_search_paths: addl_lib_search_paths,
target_triple: target_triple} as filesearch
}
// FIXME #1001: This can't be an obj method
fn search<T: copy>(filesearch: filesearch, pick: pick<T>) -> option::t<T> {
for lib_search_path in filesearch.lib_search_paths() {
#debug("searching %s", lib_search_path);
for path in fs::list_dir(lib_search_path) {
#debug("testing %s", path);
let maybe_picked = pick(path);
if option::is_some(maybe_picked) {
#debug("picked %s", path);
ret maybe_picked;
} else {
#debug("rejected %s", path);
}
}
}
ret option::none;
}
fn relative_target_lib_path(target_triple: str) -> [fs::path] {
[libdir(), "rustc", target_triple, libdir()]
}
fn make_target_lib_path(sysroot: fs::path,
target_triple: str) -> fs::path {
let path = [sysroot] + relative_target_lib_path(target_triple);
check vec::is_not_empty(path);
let path = fs::connect_many(path);
ret path;
}
fn get_default_sysroot() -> fs::path {
alt os::get_exe_path() {
option::some(p) { fs::normalize(fs::connect(p, "..")) }
option::none {
fail "can't determine value for sysroot";
}
}
}
fn get_sysroot(maybe_sysroot: option::t<fs::path>) -> fs::path {
alt maybe_sysroot {
option::some(sr) { sr }
option::none { get_default_sysroot() }
}
}
fn get_cargo_root() -> result::t<fs::path, str> {
alt generic_os::getenv("CARGO_ROOT") {
some(_p) { result::ok(_p) }
none {
alt fs::homedir() {
some(_q) { result::ok(fs::connect(_q, ".cargo")) }
none { result::err("no CARGO_ROOT or home directory") }
}
}
}
}
fn get_cargo_lib_path() -> result::t<fs::path, str> {
result::chain(get_cargo_root()) { |p|
result::ok(fs::connect(p, libdir()))
}
}
// The name of the directory rustc expects libraries to be located.
// On Unix should be "lib", on windows "bin"
fn libdir() -> str {
let libdir = #env("CFG_LIBDIR");
if str::is_empty(libdir) {
fail "rustc compiled without CFG_LIBDIR environment variable";
}
libdir
}
|
