1 files changed, 187 insertions, 0 deletions
diff --git a/third_party/rust/dirs-sys/src/lib.rs b/third_party/rust/dirs-sys/src/lib.rs
new file mode 100644
index 0000000000..50d321e273
--- /dev/null
+++ b/third_party/rust/dirs-sys/src/lib.rs
@@ -0,0 +1,187 @@
+#[macro_use]
+extern crate cfg_if;
+
+use std::ffi::OsString;
+use std::path::PathBuf;
+use std::env;
+
+// we don't need to explicitly handle empty strings in the code above,
+// because an empty string is not considered to be a absolute path here.
+pub fn is_absolute_path(path: OsString) -> Option<PathBuf> {
+    let path = PathBuf::from(path);
+    if path.is_absolute() {
+        Some(path)
+    } else {
+        None
+    }
+}
+
+
+cfg_if! { if #[cfg(all(unix, not(target_os = "redox")))] {
+
+extern crate libc;
+
+use std::ffi::CStr;
+use std::mem;
+use std::os::unix::ffi::OsStringExt;
+use std::ptr;
+
+// https://github.com/rust-lang/rust/blob/master/src/libstd/sys/unix/os.rs#L498
+pub fn home_dir() -> Option<PathBuf> {
+    return env::var_os("HOME")
+        .and_then(|h| if h.is_empty() { None } else { Some(h) })
+        .or_else(|| unsafe { fallback() })
+        .map(PathBuf::from);
+
+    #[cfg(any(target_os = "android", target_os = "ios", target_os = "emscripten"))]
+    unsafe fn fallback() -> Option<OsString> {
+        None
+    }
+    #[cfg(not(any(target_os = "android", target_os = "ios", target_os = "emscripten")))]
+    unsafe fn fallback() -> Option<OsString> {
+        let amt = match libc::sysconf(libc::_SC_GETPW_R_SIZE_MAX) {
+            n if n < 0 => 512 as usize,
+            n => n as usize,
+        };
+        let mut buf = Vec::with_capacity(amt);
+        let mut passwd: libc::passwd = mem::zeroed();
+        let mut result = ptr::null_mut();
+        match libc::getpwuid_r(
+            libc::getuid(),
+            &mut passwd,
+            buf.as_mut_ptr(),
+            buf.capacity(),
+            &mut result,
+        ) {
+            0 if !result.is_null() => {
+                let ptr = passwd.pw_dir as *const _;
+                let bytes = CStr::from_ptr(ptr).to_bytes();
+                if bytes.is_empty() {
+                    None
+                } else {
+                    Some(OsStringExt::from_vec(bytes.to_vec()))
+                }
+            }
+            _ => None,
+        }
+    }
+}
+
+}}
+
+
+cfg_if! { if #[cfg(target_os = "redox")] {
+
+extern crate redox_users;
+
+use self::redox_users::All;
+use self::redox_users::AllUsers;
+use self::redox_users::Config;
+
+pub fn home_dir() -> Option<PathBuf> {
+    let current_uid = redox_users::get_uid().ok()?;
+    let users = AllUsers::new(Config::default()).ok()?;
+    let user = users.get_by_id(current_uid)?;
+
+    Some(PathBuf::from(user.home.clone()))
+}
+
+}}
+
+cfg_if! { if #[cfg(all(unix, not(any(target_os = "macos", target_os = "ios"))))] {
+
+mod xdg_user_dirs;
+
+use std::path::Path;
+
+use std::collections::HashMap;
+
+fn user_dir_file(home_dir: &Path) -> PathBuf {
+    env::var_os("XDG_CONFIG_HOME").and_then(is_absolute_path).unwrap_or_else(|| home_dir.join(".config")).join("user-dirs.dirs")
+}
+
+// this could be optimized further to not create a map and instead retrieve the requested path only
+pub fn user_dir(user_dir_name: &str) -> Option<PathBuf> {
+    if let Some(home_dir) = home_dir() {
+        xdg_user_dirs::single(&home_dir, &user_dir_file(&home_dir), user_dir_name).remove(user_dir_name)
+    } else {
+        None
+    }
+}
+
+pub fn user_dirs(home_dir_path: &Path) -> HashMap<String, PathBuf> {
+    xdg_user_dirs::all(home_dir_path, &user_dir_file(home_dir_path))
+}
+}}
+
+
+cfg_if! { if #[cfg(target_os = "windows")] {
+
+extern crate winapi;
+use self::winapi::shared::winerror;
+use self::winapi::um::combaseapi;
+use self::winapi::um::knownfolders;
+use self::winapi::um::shlobj;
+use self::winapi::um::shtypes;
+use self::winapi::um::winbase;
+use self::winapi::um::winnt;
+
+pub fn known_folder(folder_id: shtypes::REFKNOWNFOLDERID) -> Option<PathBuf> {
+    unsafe {
+        let mut path_ptr: winnt::PWSTR = std::ptr::null_mut();
+        let result = shlobj::SHGetKnownFolderPath(folder_id, 0, std::ptr::null_mut(), &mut path_ptr);
+        if result == winerror::S_OK {
+            let len = winbase::lstrlenW(path_ptr) as usize;
+            let path = std::slice::from_raw_parts(path_ptr, len);
+            let ostr: std::ffi::OsString = std::os::windows::ffi::OsStringExt::from_wide(path);
+            combaseapi::CoTaskMemFree(path_ptr as *mut winapi::ctypes::c_void);
+            Some(PathBuf::from(ostr))
+        } else {
+            None
+        }
+    }
+}
+
+pub fn known_folder_profile() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_Profile)
+}
+
+pub fn known_folder_roaming_app_data() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_RoamingAppData)
+}
+
+pub fn known_folder_local_app_data() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_LocalAppData)
+}
+
+pub fn known_folder_music() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_Music)
+}
+
+pub fn known_folder_desktop() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_Desktop)
+}
+
+pub fn known_folder_documents() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_Documents)
+}
+
+pub fn known_folder_downloads() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_Downloads)
+}
+
+pub fn known_folder_pictures() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_Pictures)
+}
+
+pub fn known_folder_public() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_Public)
+}
+pub fn known_folder_templates() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_Templates)
+}
+pub fn known_folder_videos() -> Option<PathBuf> {
+    known_folder(&knownfolders::FOLDERID_Videos)
+}
+
+}}