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|
// A module for searching for libraries
// FIXME (#2658): I'm not happy how this module turned out. Should
// probably just be folded into cstore.
import result::result;
export filesearch;
export mk_filesearch;
export pick;
export pick_file;
export search;
export relative_target_lib_path;
export get_cargo_sysroot;
export get_cargo_root;
export get_cargo_root_nearest;
export libdir;
import path::path;
type pick<T> = fn(path: path) -> option<T>;
fn pick_file(file: path, path: path) -> option<path> {
if path::basename(path) == file { option::some(path) }
else { option::none }
}
iface filesearch {
fn sysroot() -> path;
fn lib_search_paths() -> ~[path];
fn get_target_lib_path() -> path;
fn get_target_lib_file_path(file: path) -> path;
}
fn mk_filesearch(maybe_sysroot: option<path>,
target_triple: str,
addl_lib_search_paths: ~[path]) -> filesearch {
type filesearch_impl = {sysroot: path,
addl_lib_search_paths: ~[path],
target_triple: str};
impl of filesearch for filesearch_impl {
fn sysroot() -> path { self.sysroot }
fn lib_search_paths() -> ~[path] {
let mut paths = self.addl_lib_search_paths;
vec::push(paths,
make_target_lib_path(self.sysroot, self.target_triple));
alt get_cargo_lib_path_nearest() {
result::ok(p) { vec::push(paths, p) }
result::err(p) { }
}
alt get_cargo_lib_path() {
result::ok(p) { vec::push(paths, p) }
result::err(p) { }
}
paths
}
fn get_target_lib_path() -> path {
make_target_lib_path(self.sysroot, self.target_triple)
}
fn get_target_lib_file_path(file: path) -> path {
path::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
}
fn search<T: copy>(filesearch: filesearch, pick: pick<T>) -> option<T> {
let mut rslt = none;
for filesearch.lib_search_paths().each |lib_search_path| {
#debug("searching %s", lib_search_path);
for os::list_dir_path(lib_search_path).each |path| {
#debug("testing %s", path);
let maybe_picked = pick(path);
if option::is_some(maybe_picked) {
#debug("picked %s", path);
rslt = maybe_picked;
break;
} else {
#debug("rejected %s", path);
}
}
if option::is_some(rslt) { break; }
}
ret rslt;
}
fn relative_target_lib_path(target_triple: str) -> ~[path] {
~[libdir(), "rustc", target_triple, libdir()]
}
fn make_target_lib_path(sysroot: path,
target_triple: str) -> path {
let path = vec::append(~[sysroot],
relative_target_lib_path(target_triple));
let path = path::connect_many(path);
ret path;
}
fn get_default_sysroot() -> path {
alt os::self_exe_path() {
option::some(p) { path::normalize(path::connect(p, "..")) }
option::none {
fail "can't determine value for sysroot";
}
}
}
fn get_sysroot(maybe_sysroot: option<path>) -> path {
alt maybe_sysroot {
option::some(sr) { sr }
option::none { get_default_sysroot() }
}
}
fn get_cargo_sysroot() -> result<path, str> {
let path = ~[get_default_sysroot(), libdir(), "cargo"];
result::ok(path::connect_many(path))
}
fn get_cargo_root() -> result<path, str> {
alt os::getenv("CARGO_ROOT") {
some(_p) { result::ok(_p) }
none {
alt os::homedir() {
some(_q) { result::ok(path::connect(_q, ".cargo")) }
none { result::err("no CARGO_ROOT or home directory") }
}
}
}
}
fn get_cargo_root_nearest() -> result<path, str> {
do result::chain(get_cargo_root()) |p| {
let cwd = os::getcwd();
let mut dirname = path::dirname(cwd);
let mut dirpath = path::split(dirname);
let cwd_cargo = path::connect(cwd, ".cargo");
let mut par_cargo = path::connect(dirname, ".cargo");
let mut rslt = result::ok(cwd_cargo);
if !os::path_is_dir(cwd_cargo) && cwd_cargo != p {
while vec::is_not_empty(dirpath) && par_cargo != p {
if os::path_is_dir(par_cargo) {
rslt = result::ok(par_cargo);
break;
}
vec::pop(dirpath);
dirname = path::dirname(dirname);
par_cargo = path::connect(dirname, ".cargo");
}
}
rslt
}
}
fn get_cargo_lib_path() -> result<path, str> {
do result::chain(get_cargo_root()) |p| {
result::ok(path::connect(p, libdir()))
}
}
fn get_cargo_lib_path_nearest() -> result<path, str> {
do result::chain(get_cargo_root_nearest()) |p| {
result::ok(path::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
}
|
