Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 856 insertions, 0 deletions

diff --git a/third_party/rust/dirs/.cargo-checksum.json b/third_party/rust/dirs/.cargo-checksum.json
new file mode 100644
index 0000000000..c2d4c80af9
--- /dev/null
+++ b/third_party/rust/dirs/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"5bb02a35a3ac857c60ab16972decfea610ec3bed296a41d0235dc663a64495f6","LICENSE-APACHE":"d3174ad63e721d4c9dccb8ad4320848992d314369bc46319720b5802c9153fe9","LICENSE-MIT":"6a2e0ade09a7d5f816f11566fee2b151b32235a7fad52b41d49cce96f833c1a9","README.md":"84fdbe7a22dd22574249330ce2146d4237391989e66377f087f66eca6313c032","src/lib.rs":"d0c92741b50d0b793591e9731a71053b88a8a6e8d0e808f2d3afb127eab04b6f","src/lin.rs":"4b556c3f8a02571cd62756ff542172e5c438395c600582abb76be049c3d570c8","src/mac.rs":"4ee036a83508eae7c51ae9ccdb8165603df96a580501c11c9c2d98cd672e7940","src/wasm.rs":"6b7edb4a708fef10d95ac32aa4f7a81d465794edeb805dc7c2168e351daaca2c","src/win.rs":"8296c5f68e85ba456b48a5153cffded163d12e431a0929daa873ae09e5ce3d10"},"package":"ca3aa72a6f96ea37bbc5aa912f6788242832f75369bdfdadcb0e38423f100059"}
\ No newline at end of file
diff --git a/third_party/rust/dirs/Cargo.toml b/third_party/rust/dirs/Cargo.toml
new file mode 100644
index 0000000000..b6151d10b4
--- /dev/null
+++ b/third_party/rust/dirs/Cargo.toml
@@ -0,0 +1,22 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+name = "dirs"
+version = "4.0.0"
+authors = ["Simon Ochsenreither <simon@ochsenreither.de>"]
+description = "A tiny low-level library that provides platform-specific standard locations of directories for config, cache and other data on Linux, Windows, macOS and Redox by leveraging the mechanisms defined by the XDG base/user directory specifications on Linux, the Known Folder API on Windows, and the Standard Directory guidelines on macOS."
+readme = "README.md"
+keywords = ["xdg", "basedir", "app_dirs", "path", "folder"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/soc/dirs-rs"
+[dependencies.dirs-sys]
+version = "0.3.6"
diff --git a/third_party/rust/dirs/LICENSE-APACHE b/third_party/rust/dirs/LICENSE-APACHE
new file mode 100644
index 0000000000..91e18a62b6
--- /dev/null
+++ b/third_party/rust/dirs/LICENSE-APACHE
@@ -0,0 +1,174 @@
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diff --git a/third_party/rust/dirs/LICENSE-MIT b/third_party/rust/dirs/LICENSE-MIT
new file mode 100644
index 0000000000..1452dc1432
--- /dev/null
+++ b/third_party/rust/dirs/LICENSE-MIT
@@ -0,0 +1,19 @@
+Copyright (c) 2018-2019 dirs-rs contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
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+SOFTWARE.
diff --git a/third_party/rust/dirs/README.md b/third_party/rust/dirs/README.md
new file mode 100644
index 0000000000..c1458bf863
--- /dev/null
+++ b/third_party/rust/dirs/README.md
@@ -0,0 +1,218 @@
+[![crates.io](https://img.shields.io/crates/v/dirs.svg)](https://crates.io/crates/dirs)
+[![API documentation](https://docs.rs/dirs/badge.svg)](https://docs.rs/dirs/)
+![actively developed](https://img.shields.io/badge/maintenance-actively--developed-brightgreen.svg)
+[![TravisCI status](https://img.shields.io/travis/dirs-dev/dirs-rs/master.svg?label=Linux/macOS%20build)](https://travis-ci.org/dirs-dev/dirs-rs)
+[![AppVeyor status](https://img.shields.io/appveyor/ci/soc/dirs-rs/master.svg?label=Windows%20build)](https://ci.appveyor.com/project/soc/dirs-rs/branch/master)
+![License: MIT/Apache-2.0](https://img.shields.io/badge/license-MIT%2FApache--2.0-orange.svg)
+
+# `dirs`
+
+## Introduction
+
+- a tiny low-level library with a minimal API
+- that provides the platform-specific, user-accessible locations
+- for retrieving and storing configuration, cache and other data
+- on Linux, Redox, Windows (≥ Vista), macOS and other platforms.
+
+The library provides the location of these directories by leveraging the mechanisms defined by
+- the [XDG base directory](https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html) and
+  the [XDG user directory](https://www.freedesktop.org/wiki/Software/xdg-user-dirs/) specifications on Linux and Redox
+- the [Known Folder](https://msdn.microsoft.com/en-us/library/windows/desktop/dd378457.aspx) API on Windows
+- the [Standard Directories](https://developer.apple.com/library/content/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/FileSystemOverview/FileSystemOverview.html#//apple_ref/doc/uid/TP40010672-CH2-SW6)
+  guidelines on macOS
+
+## Platforms
+
+This library is written in Rust, and supports Linux, Redox, macOS and Windows.
+Other platforms are also supported; they use the Linux conventions.
+
+The minimal required version of Rust is 1.13 except for Redox, where the minimum Rust version
+depends on the [`redox_users`](https://crates.io/crates/redox_users) crate.
+
+It's mid-level sister library, _directories_, is available for Rust ([directories-rs](https://github.com/dirs-dev/directories-rs))
+and on the JVM ([directories-jvm](https://github.com/dirs-dev/directories-jvm)).
+
+## Usage
+
+#### Dependency
+
+Add the library as a dependency to your project by inserting
+
+```toml
+dirs = "4.0"
+```
+
+into the `[dependencies]` section of your Cargo.toml file.
+
+If you are upgrading from version 2, please read the [section on breaking changes](#3) first.
+
+#### Example
+
+Library run by user Alice:
+
+```rust
+extern crate dirs;
+
+dirs::home_dir();
+// Lin: Some(/home/alice)
+// Win: Some(C:\Users\Alice)
+// Mac: Some(/Users/Alice)
+
+dirs::audio_dir();
+// Lin: Some(/home/alice/Music)
+// Win: Some(C:\Users\Alice\Music)
+// Mac: Some(/Users/Alice/Music)
+
+dirs::config_dir();
+// Lin: Some(/home/alice/.config)
+// Win: Some(C:\Users\Alice\AppData\Roaming)
+// Mac: Some(/Users/Alice/Library/Application Support)
+
+dirs::executable_dir();
+// Lin: Some(/home/alice/.local/bin)
+// Win: None
+// Mac: None
+```
+
+## Design Goals
+
+- The _dirs_ library is a low-level crate designed to provide the paths to standard directories
+  as defined by operating systems rules or conventions.<br/>
+  If your requirements are more complex, e. g. computing cache, config, etc. paths for specific
+  applications or projects, consider using [directories](https://github.com/dirs-dev/directories-rs)
+  instead.
+- This library does not create directories or check for their existence. The library only provides
+  information on what the path to a certain directory _should_ be.<br/>
+  How this information is used is a decision that developers need to make based on the requirements
+  of each individual application.
+- This library is intentionally focused on providing information on user-writable directories only,
+  as there is no discernible benefit in returning a path that points to a user-level, writable
+  directory on one operating system, but a system-level, read-only directory on another.<br/>
+  The confusion and unexpected failure modes of such an approach would be immense.
+  - `executable_dir` is specified to provide the path to a user-writable directory for binaries.<br/>
+    As such a directory only commonly exists on Linux, it returns `None` on macOS and Windows.
+  - `font_dir` is specified to provide the path to a user-writable directory for fonts.<br/>
+    As such a directory only exists on Linux and macOS, it returns `None` on Windows.
+  - `runtime_dir` is specified to provide the path to a directory for non-essential runtime data.
+    It is required that this directory is created when the user logs in, is only accessible by the
+    user itself, is deleted when the user logs out, and supports all filesystem features of the
+    operating system.<br/>
+    As such a directory only commonly exists on Linux, it returns `None` on macOS and Windows.
+
+## Features
+
+**If you want to compute the location of cache, config or data directories for your own application or project,
+use `ProjectDirs` of the [directories](https://github.com/dirs-dev/directories-rs) project instead.**
+
+| Function name    | Value on Linux/Redox                                                   | Value on Windows                  | Value on macOS                              |
+| ---------------- | ---------------------------------------------------------------------- | --------------------------------- | ------------------------------------------- |
+| `home_dir`       | `Some($HOME)`                                                          | `Some({FOLDERID_Profile})`        | `Some($HOME)`                               |
+| `cache_dir`      | `Some($XDG_CACHE_HOME)`         or `Some($HOME`/.cache`)`              | `Some({FOLDERID_LocalAppData})`   | `Some($HOME`/Library/Caches`)`              |
+| `config_dir`     | `Some($XDG_CONFIG_HOME)`        or `Some($HOME`/.config`)`             | `Some({FOLDERID_RoamingAppData})` | `Some($HOME`/Library/Application Support`)` |
+| `data_dir`       | `Some($XDG_DATA_HOME)`          or `Some($HOME`/.local/share`)`        | `Some({FOLDERID_RoamingAppData})` | `Some($HOME`/Library/Application Support`)` |
+| `data_local_dir` | `Some($XDG_DATA_HOME)`          or `Some($HOME`/.local/share`)`        | `Some({FOLDERID_LocalAppData})`   | `Some($HOME`/Library/Application Support`)` |
+| `executable_dir` | `Some($XDG_BIN_HOME)`           or `Some($HOME`/.local/bin`)`          | `None`                            | `None`                                      |
+| `preference_dir` | `Some($XDG_CONFIG_HOME)`        or `Some($HOME`/.config`)`             | `Some({FOLDERID_RoamingAppData})` | `Some($HOME`/Library/Preferences`)`         |
+| `runtime_dir`    | `Some($XDG_RUNTIME_DIR)`        or `None`                              | `None`                            | `None`                                      |
+| `state_dir`      | `Some($XDG_STATE_HOME)`         or `Some($HOME`/.local/state`)`        | `None`                            | `None`                                      |
+| `audio_dir`      | `Some(XDG_MUSIC_DIR)`           or `None`                              | `Some({FOLDERID_Music})`          | `Some($HOME`/Music/`)`                      |
+| `desktop_dir`    | `Some(XDG_DESKTOP_DIR)`         or `None`                              | `Some({FOLDERID_Desktop})`        | `Some($HOME`/Desktop/`)`                    |
+| `document_dir`   | `Some(XDG_DOCUMENTS_DIR)`       or `None`                              | `Some({FOLDERID_Documents})`      | `Some($HOME`/Documents/`)`                  |
+| `download_dir`   | `Some(XDG_DOWNLOAD_DIR)`        or `None`                              | `Some({FOLDERID_Downloads})`      | `Some($HOME`/Downloads/`)`                  |
+| `font_dir`       | `Some($XDG_DATA_HOME`/fonts/`)` or `Some($HOME`/.local/share/fonts/`)` | `None`                            | `Some($HOME`/Library/Fonts/`)`              |
+| `picture_dir`    | `Some(XDG_PICTURES_DIR)`        or `None`                              | `Some({FOLDERID_Pictures})`       | `Some($HOME`/Pictures/`)`                   |
+| `public_dir`     | `Some(XDG_PUBLICSHARE_DIR)`     or `None`                              | `Some({FOLDERID_Public})`         | `Some($HOME`/Public/`)`                     |
+| `template_dir`   | `Some(XDG_TEMPLATES_DIR)`       or `None`                              | `Some({FOLDERID_Templates})`      | `None`                                      |
+| `video_dir`      | `Some(XDG_VIDEOS_DIR)`          or `None`                              | `Some({FOLDERID_Videos})`         | `Some($HOME`/Movies/`)`                     |
+
+## Comparison
+
+There are other crates in the Rust ecosystem that try similar or related things.
+Here is an overview of them, combined with ratings on properties that guided the design of this crate.
+
+Please take this table with a grain of salt: a different crate might very well be more suitable for your specific use case.
+(Of course _my_ crate achieves _my_ design goals better than other crates, which might have had different design goals.)
+
+| Library                                                   | Status         | Lin | Mac | Win |Base|User|Proj|Conv|
+| --------------------------------------------------------- | -------------- |:---:|:---:|:---:|:--:|:--:|:--:|:--:|
+| [app_dirs](https://crates.io/crates/app_dirs)             | Unmaintained   |  ✔  |  ✔  |  ✔  | 🞈  | ✖  | ✔  | ✖  |
+| [app_dirs2](https://crates.io/crates/app_dirs2)           | Maintained     |  ✔  |  ✔  |  ✔  | 🞈  | ✖  | ✔  | ✖  |
+| **dirs**                                                  | **Developed**  |  ✔  |  ✔  |  ✔  | ✔  | ✔  | ✖  | ✔  |
+| [directories](https://crates.io/crates/directories)       | Developed      |  ✔  |  ✔  |  ✔  | ✔  | ✔  | ✔  | ✔  |
+| [s_app_dir](https://crates.io/crates/s_app_dir)           | Unmaintained?  |  ✔  |  ✖  |  🞈  | ✖  | ✖  | 🞈  | ✖  |
+| [standard_paths](https://crates.io/crates/standard_paths) | Maintained     |  ✔  |  ✖  |  ✔  | ✔  | ✔  | ✔  | ✖  |
+| [xdg](https://crates.io/crates/xdg)                       | Maintained     |  ✔  |  ✖  |  ✖  | ✔  | ✖  | ✔  | 🞈  |
+| [xdg-basedir](https://crates.io/crates/xdg-basedir)       | Unmaintained?  |  ✔  |  ✖  |  ✖  | ✔   | ✖  | ✖  | 🞈  |
+| [xdg-rs](https://crates.io/crates/xdg-rs)                 | Obsolete       |  ✔  |  ✖  |  ✖  | ✔   | ✖  | ✖  | 🞈  |
+
+- Lin: Linux support
+- Mac: macOS support
+- Win: Windows support
+- Base: Supports [generic base directories](https://github.com/dirs-dev/directories-rs#basedirs)
+- User: Supports [user directories](https://github.com/dirs-dev/directories-rs#userdirs)
+- Proj: Supports [project-specific base directories](https://github.com/dirs-dev/directories-rs#projectdirs)
+- Conv: Follows naming conventions of the operating system it runs on
+
+## Build
+
+It's possible to cross-compile this library if the necessary toolchains are installed with rustup.
+This is helpful to ensure a change hasn't broken code on a different platform.
+
+The following commands will build this library on Linux, macOS and Windows:
+
+```
+cargo build --target=x86_64-unknown-linux-gnu
+cargo build --target=x86_64-pc-windows-gnu
+cargo build --target=x86_64-apple-darwin
+cargo build --target=x86_64-unknown-redox
+```
+
+## Changelog
+
+### 4
+
+- **BREAKING CHANGE** The behavior of `executable_dir` has been adjusted to not depend on `$XDG_DATA_HOME`.
+  Code, which assumed that setting the `$XDG_DATA_HOME` environment variable also impacted `executable_dir` if
+  the `$XDG_BIN_HOME` environment variable was not set, requires adjustment.
+- Add support for `XDG_STATE_HOME`.
+
+### 3
+
+- **BREAKING CHANGE** The behavior of `config_dir` on macOS has been adjusted
+  (thanks to [everyone involved](https://github.com/dirs-dev/directories-rs/issues/62)):
+  - The existing `config_dir` function has been changed to return the `Application Support`
+    directory on macOS, as suggested by Apple documentation.
+  - The behavior of the `config_dir` function on non-macOS platforms has not been changed.
+  - If you have used the `config_dir` function to store files, it may be necessary to write code
+    that migrates the files to the new location on macOS.<br/>
+    (Alternative: change uses of the `config_dir` function to uses of the `preference_dir` function
+    to retain the old behavior.)
+- The newly added `preference_dir` function returns the `Preferences` directory on macOS now,
+  which – according to Apple documentation – shall only be used to store .plist files using
+  Apple-proprietary APIs.
+  – `preference_dir` and `config_dir` behave identical on non-macOS platforms.
+
+### 2
+
+**BREAKING CHANGE** The behavior of deactivated, missing or invalid [_XDG User Dirs_](https://www.freedesktop.org/wiki/Software/xdg-user-dirs/)
+entries on Linux has been improved (contributed by @tmiasko, thank you!):
+
+- Version 1 returned the user's home directory (`Some($HOME)`) for such faulty entries, except for a faulty `XDG_DESKTOP_DIR` entry which returned (`Some($HOME/Desktop)`).
+- Version 2 returns `None` for such entries.
+
+## License
+
+Licensed under either of
+
+ * Apache License, Version 2.0
+   ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license
+   ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+## Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
diff --git a/third_party/rust/dirs/src/lib.rs b/third_party/rust/dirs/src/lib.rs
new file mode 100644
index 0000000000..3828b4fe73
--- /dev/null
+++ b/third_party/rust/dirs/src/lib.rs
@@ -0,0 +1,316 @@
+//! The _dirs_ crate is
+//!
+//! - a tiny library with a minimal API (18 public functions)
+//! - that provides the platform-specific, user-accessible locations
+//! - for finding and storing configuration, cache and other data
+//! - on Linux, Redox, Windows (≥ Vista) and macOS.
+//!
+//! The library provides the location of these directories by leveraging the mechanisms defined by
+//!
+//! - the [XDG base directory](https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html) and the [XDG user directory](https://www.freedesktop.org/wiki/Software/xdg-user-dirs/) specifications on Linux,
+//! - the [Known Folder](https://msdn.microsoft.com/en-us/library/windows/desktop/bb776911(v=vs.85).aspx) system on Windows, and
+//! - the [Standard Directories](https://developer.apple.com/library/content/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/FileSystemOverview/FileSystemOverview.html#//apple_ref/doc/uid/TP40010672-CH2-SW6) on macOS.
+
+#![deny(missing_docs)]
+
+use std::path::PathBuf;
+
+#[cfg(target_os = "windows")]
+mod win;
+#[cfg(target_os = "windows")]
+use win as sys;
+
+#[cfg(any(target_os = "macos", target_os = "ios"))]
+mod mac;
+#[cfg(any(target_os = "macos", target_os = "ios"))]
+use mac as sys;
+
+#[cfg(target_arch = "wasm32")]
+mod wasm;
+#[cfg(target_arch = "wasm32")]
+use wasm as sys;
+
+#[cfg(not(any(
+    target_os = "windows",
+    target_os = "macos", target_os = "ios",
+    target_arch = "wasm32"
+)))]
+mod lin;
+#[cfg(not(any(
+    target_os = "windows",
+    target_os = "macos", target_os = "ios",
+    target_arch = "wasm32"
+)))]
+use lin as sys;
+
+/// Returns the path to the user's home directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                | Example        |
+/// | ------- | -------------------- | -------------- |
+/// | Linux   | `$HOME`              | /home/alice    |
+/// | macOS   | `$HOME`              | /Users/Alice   |
+/// | Windows | `{FOLDERID_Profile}` | C:\Users\Alice |
+///
+/// ### Linux and macOS:
+///
+/// - Use `$HOME` if it is set and not empty.
+/// - If `$HOME` is not set or empty, then the function `getpwuid_r` is used to determine
+///   the home directory of the current user.
+/// - If `getpwuid_r` lacks an entry for the current user id or the home directory field is empty,
+///   then the function returns `None`.
+///
+/// ### Windows:
+///
+/// This function retrieves the user profile folder using `SHGetKnownFolderPath`.
+///
+/// All the examples on this page mentioning `$HOME` use this behavior.
+///
+/// _Note:_ This function's behavior differs from [`std::env::home_dir`],
+/// which works incorrectly on Linux, macOS and Windows.
+///
+/// [`std::env::home_dir`]: https://doc.rust-lang.org/std/env/fn.home_dir.html
+pub fn home_dir() -> Option<PathBuf> {
+    sys::home_dir()
+}
+/// Returns the path to the user's cache directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                               | Example                      |
+/// | ------- | ----------------------------------- | ---------------------------- |
+/// | Linux   | `$XDG_CACHE_HOME` or `$HOME`/.cache | /home/alice/.cache           |
+/// | macOS   | `$HOME`/Library/Caches              | /Users/Alice/Library/Caches  |
+/// | Windows | `{FOLDERID_LocalAppData}`           | C:\Users\Alice\AppData\Local |
+pub fn cache_dir() -> Option<PathBuf> {
+    sys::cache_dir()
+}
+/// Returns the path to the user's config directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                                 | Example                                  |
+/// | ------- | ------------------------------------- | ---------------------------------------- |
+/// | Linux   | `$XDG_CONFIG_HOME` or `$HOME`/.config | /home/alice/.config                      |
+/// | macOS   | `$HOME`/Library/Application Support   | /Users/Alice/Library/Application Support |
+/// | Windows | `{FOLDERID_RoamingAppData}`           | C:\Users\Alice\AppData\Roaming           |
+pub fn config_dir() -> Option<PathBuf> {
+    sys::config_dir()
+}
+/// Returns the path to the user's data directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                                    | Example                                  |
+/// | ------- | ---------------------------------------- | ---------------------------------------- |
+/// | Linux   | `$XDG_DATA_HOME` or `$HOME`/.local/share | /home/alice/.local/share                 |
+/// | macOS   | `$HOME`/Library/Application Support      | /Users/Alice/Library/Application Support |
+/// | Windows | `{FOLDERID_RoamingAppData}`              | C:\Users\Alice\AppData\Roaming           |
+pub fn data_dir() -> Option<PathBuf> {
+    sys::data_dir()
+}
+/// Returns the path to the user's local data directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                                    | Example                                  |
+/// | ------- | ---------------------------------------- | ---------------------------------------- |
+/// | Linux   | `$XDG_DATA_HOME` or `$HOME`/.local/share | /home/alice/.local/share                 |
+/// | macOS   | `$HOME`/Library/Application Support      | /Users/Alice/Library/Application Support |
+/// | Windows | `{FOLDERID_LocalAppData}`                | C:\Users\Alice\AppData\Local             |
+pub fn data_local_dir() -> Option<PathBuf> {
+    sys::data_local_dir()
+}
+/// Returns the path to the user's executable directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                                                            | Example                |
+/// | ------- | ---------------------------------------------------------------- | ---------------------- |
+/// | Linux   | `$XDG_BIN_HOME` or `$XDG_DATA_HOME`/../bin or `$HOME`/.local/bin | /home/alice/.local/bin |
+/// | macOS   | –                                                                | –                      |
+/// | Windows | –                                                                | –                      |
+pub fn executable_dir() -> Option<PathBuf> {
+    sys::executable_dir()
+}
+/// Returns the path to the user's preference directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                                 | Example                          |
+/// | ------- | ------------------------------------- | -------------------------------- |
+/// | Linux   | `$XDG_CONFIG_HOME` or `$HOME`/.config | /home/alice/.config              |
+/// | macOS   | `$HOME`/Library/Preferences           | /Users/Alice/Library/Preferences |
+/// | Windows | `{FOLDERID_RoamingAppData}`           | C:\Users\Alice\AppData\Roaming   |
+pub fn preference_dir() -> Option<PathBuf> {
+    sys::preference_dir()
+}
+/// Returns the path to the user's runtime directory.
+///
+/// The runtime directory contains transient, non-essential data (like sockets or named pipes) that
+/// is expected to be cleared when the user's session ends.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value              | Example         |
+/// | ------- | ------------------ | --------------- |
+/// | Linux   | `$XDG_RUNTIME_DIR` | /run/user/1001/ |
+/// | macOS   | –                  | –               |
+/// | Windows | –                  | –               |
+pub fn runtime_dir() -> Option<PathBuf> {
+    sys::runtime_dir()
+}
+/// Returns the path to the user's state directory.
+///
+/// The state directory contains data that should be retained between sessions (unlike the runtime
+/// directory), but may not be important/portable enough to be synchronized across machines (unlike
+/// the config/preferences/data directories).
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                                     | Example                  |
+/// | ------- | ----------------------------------------- | ------------------------ |
+/// | Linux   | `$XDG_STATE_HOME` or `$HOME`/.local/state | /home/alice/.local/state |
+/// | macOS   | –                                         | –                        |
+/// | Windows | –                                         | –                        |
+pub fn state_dir() -> Option<PathBuf> {
+    sys::state_dir()
+}
+
+/// Returns the path to the user's audio directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value              | Example              |
+/// | ------- | ------------------ | -------------------- |
+/// | Linux   | `XDG_MUSIC_DIR`    | /home/alice/Music    |
+/// | macOS   | `$HOME`/Music      | /Users/Alice/Music   |
+/// | Windows | `{FOLDERID_Music}` | C:\Users\Alice\Music |
+pub fn audio_dir() -> Option<PathBuf> {
+    sys::audio_dir()
+}
+/// Returns the path to the user's desktop directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                | Example                |
+/// | ------- | -------------------- | ---------------------- |
+/// | Linux   | `XDG_DESKTOP_DIR`    | /home/alice/Desktop    |
+/// | macOS   | `$HOME`/Desktop      | /Users/Alice/Desktop   |
+/// | Windows | `{FOLDERID_Desktop}` | C:\Users\Alice\Desktop |
+pub fn desktop_dir() -> Option<PathBuf> {
+    sys::desktop_dir()
+}
+/// Returns the path to the user's document directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                  | Example                  |
+/// | ------- | ---------------------- | ------------------------ |
+/// | Linux   | `XDG_DOCUMENTS_DIR`    | /home/alice/Documents    |
+/// | macOS   | `$HOME`/Documents      | /Users/Alice/Documents   |
+/// | Windows | `{FOLDERID_Documents}` | C:\Users\Alice\Documents |
+pub fn document_dir() -> Option<PathBuf> {
+    sys::document_dir()
+}
+/// Returns the path to the user's download directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                  | Example                  |
+/// | ------- | ---------------------- | ------------------------ |
+/// | Linux   | `XDG_DOWNLOAD_DIR`     | /home/alice/Downloads    |
+/// | macOS   | `$HOME`/Downloads      | /Users/Alice/Downloads   |
+/// | Windows | `{FOLDERID_Downloads}` | C:\Users\Alice\Downloads |
+pub fn download_dir() -> Option<PathBuf> {
+    sys::download_dir()
+}
+/// Returns the path to the user's font directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                                                | Example                        |
+/// | ------- | ---------------------------------------------------- | ------------------------------ |
+/// | Linux   | `$XDG_DATA_HOME`/fonts or `$HOME`/.local/share/fonts | /home/alice/.local/share/fonts |
+/// | macOS   | `$HOME/Library/Fonts`                                | /Users/Alice/Library/Fonts     |
+/// | Windows | –                                                    | –                              |
+pub fn font_dir() -> Option<PathBuf> {
+    sys::font_dir()
+}
+/// Returns the path to the user's picture directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                 | Example                 |
+/// | ------- | --------------------- | ----------------------- |
+/// | Linux   | `XDG_PICTURES_DIR`    | /home/alice/Pictures    |
+/// | macOS   | `$HOME`/Pictures      | /Users/Alice/Pictures   |
+/// | Windows | `{FOLDERID_Pictures}` | C:\Users\Alice\Pictures |
+pub fn picture_dir() -> Option<PathBuf> {
+    sys::picture_dir()
+}
+/// Returns the path to the user's public directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                 | Example             |
+/// | ------- | --------------------- | ------------------- |
+/// | Linux   | `XDG_PUBLICSHARE_DIR` | /home/alice/Public  |
+/// | macOS   | `$HOME`/Public        | /Users/Alice/Public |
+/// | Windows | `{FOLDERID_Public}`   | C:\Users\Public     |
+pub fn public_dir() -> Option<PathBuf> {
+    sys::public_dir()
+}
+/// Returns the path to the user's template directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value                  | Example                                                    |
+/// | ------- | ---------------------- | ---------------------------------------------------------- |
+/// | Linux   | `XDG_TEMPLATES_DIR`    | /home/alice/Templates                                      |
+/// | macOS   | –                      | –                                                          |
+/// | Windows | `{FOLDERID_Templates}` | C:\Users\Alice\AppData\Roaming\Microsoft\Windows\Templates |
+pub fn template_dir() -> Option<PathBuf> {
+    sys::template_dir()
+}
+
+/// Returns the path to the user's video directory.
+///
+/// The returned value depends on the operating system and is either a `Some`, containing a value from the following table, or a `None`.
+///
+/// |Platform | Value               | Example               |
+/// | ------- | ------------------- | --------------------- |
+/// | Linux   | `XDG_VIDEOS_DIR`    | /home/alice/Videos    |
+/// | macOS   | `$HOME`/Movies      | /Users/Alice/Movies   |
+/// | Windows | `{FOLDERID_Videos}` | C:\Users\Alice\Videos |
+pub fn video_dir() -> Option<PathBuf> {
+    sys::video_dir()
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_dirs() {
+        println!("home_dir:       {:?}", ::home_dir());
+        println!();
+        println!("cache_dir:      {:?}", ::cache_dir());
+        println!("config_dir:     {:?}", ::config_dir());
+        println!("data_dir:       {:?}", ::data_dir());
+        println!("data_local_dir: {:?}", ::data_local_dir());
+        println!("executable_dir: {:?}", ::executable_dir());
+        println!("preference_dir: {:?}", ::preference_dir());
+        println!("runtime_dir:    {:?}", ::runtime_dir());
+        println!("state_dir:      {:?}", ::state_dir());
+        println!();
+        println!("audio_dir:      {:?}", ::audio_dir());
+        println!("desktop_dir:    {:?}", ::desktop_dir());
+        println!("cache_dir:      {:?}", ::document_dir());
+        println!("config_dir:     {:?}", ::download_dir());
+        println!("font_dir:       {:?}", ::font_dir());
+        println!("picture_dir:    {:?}", ::picture_dir());
+        println!("public_dir:     {:?}", ::public_dir());
+        println!("template_dir:   {:?}", ::template_dir());
+        println!("video_dir:      {:?}", ::video_dir());
+    }
+}
diff --git a/third_party/rust/dirs/src/lin.rs b/third_party/rust/dirs/src/lin.rs
new file mode 100644
index 0000000000..fb4fbd9b53
--- /dev/null
+++ b/third_party/rust/dirs/src/lin.rs
@@ -0,0 +1,34 @@
+extern crate dirs_sys;
+
+use std::env;
+use std::path::PathBuf;
+
+pub fn home_dir()       -> Option<PathBuf> { dirs_sys::home_dir() }
+
+pub fn cache_dir()      -> Option<PathBuf> { env::var_os("XDG_CACHE_HOME") .and_then(dirs_sys::is_absolute_path).or_else(|| home_dir().map(|h| h.join(".cache"))) }
+pub fn config_dir()     -> Option<PathBuf> { env::var_os("XDG_CONFIG_HOME").and_then(dirs_sys::is_absolute_path).or_else(|| home_dir().map(|h| h.join(".config"))) }
+pub fn data_dir()       -> Option<PathBuf> { env::var_os("XDG_DATA_HOME")  .and_then(dirs_sys::is_absolute_path).or_else(|| home_dir().map(|h| h.join(".local/share"))) }
+pub fn data_local_dir() -> Option<PathBuf> { data_dir() }
+pub fn preference_dir() -> Option<PathBuf> { config_dir() }
+pub fn runtime_dir()    -> Option<PathBuf> { env::var_os("XDG_RUNTIME_DIR").and_then(dirs_sys::is_absolute_path) }
+pub fn state_dir()      -> Option<PathBuf> { env::var_os("XDG_STATE_HOME") .and_then(dirs_sys::is_absolute_path).or_else(|| home_dir().map(|h| h.join(".local/state"))) }
+pub fn executable_dir() -> Option<PathBuf> { env::var_os("XDG_BIN_HOME")   .and_then(dirs_sys::is_absolute_path).or_else(|| home_dir().map(|h| h.join(".local/bin"))) }
+
+pub fn audio_dir()      -> Option<PathBuf> { dirs_sys::user_dir("MUSIC") }
+pub fn desktop_dir()    -> Option<PathBuf> { dirs_sys::user_dir("DESKTOP") }
+pub fn document_dir()   -> Option<PathBuf> { dirs_sys::user_dir("DOCUMENTS") }
+pub fn download_dir()   -> Option<PathBuf> { dirs_sys::user_dir("DOWNLOAD") }
+pub fn font_dir()       -> Option<PathBuf> { data_dir().map(|d| d.join("fonts")) }
+pub fn picture_dir()    -> Option<PathBuf> { dirs_sys::user_dir("PICTURES") }
+pub fn public_dir()     -> Option<PathBuf> { dirs_sys::user_dir("PUBLICSHARE") }
+pub fn template_dir()   -> Option<PathBuf> { dirs_sys::user_dir("TEMPLATES") }
+pub fn video_dir()      -> Option<PathBuf> { dirs_sys::user_dir("VIDEOS") }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_file_user_dirs_exists() {
+        let user_dirs_file = ::config_dir().unwrap().join("user-dirs.dirs");
+        println!("{:?} exists: {:?}", user_dirs_file, user_dirs_file.exists());
+    }
+}
diff --git a/third_party/rust/dirs/src/mac.rs b/third_party/rust/dirs/src/mac.rs
new file mode 100644
index 0000000000..3d8274ecc7
--- /dev/null
+++ b/third_party/rust/dirs/src/mac.rs
@@ -0,0 +1,24 @@
+extern crate dirs_sys;
+
+use std::path::PathBuf;
+
+pub fn home_dir()       -> Option<PathBuf> { dirs_sys::home_dir() }
+
+pub fn cache_dir()      -> Option<PathBuf> { home_dir().map(|h| h.join("Library/Caches")) }
+pub fn config_dir()     -> Option<PathBuf> { home_dir().map(|h| h.join("Library/Application Support")) }
+pub fn data_dir()       -> Option<PathBuf> { home_dir().map(|h| h.join("Library/Application Support")) }
+pub fn data_local_dir() -> Option<PathBuf> { data_dir() }
+pub fn preference_dir() -> Option<PathBuf> { home_dir().map(|h| h.join("Library/Preferences")) }
+pub fn executable_dir() -> Option<PathBuf> { None }
+pub fn runtime_dir()    -> Option<PathBuf> { None }
+pub fn state_dir()      -> Option<PathBuf> { None }
+
+pub fn audio_dir()      -> Option<PathBuf> { home_dir().map(|h| h.join("Music")) }
+pub fn desktop_dir()    -> Option<PathBuf> { home_dir().map(|h| h.join("Desktop")) }
+pub fn document_dir()   -> Option<PathBuf> { home_dir().map(|h| h.join("Documents")) }
+pub fn download_dir()   -> Option<PathBuf> { home_dir().map(|h| h.join("Downloads")) }
+pub fn font_dir()       -> Option<PathBuf> { home_dir().map(|h| h.join("Library/Fonts")) }
+pub fn picture_dir()    -> Option<PathBuf> { home_dir().map(|h| h.join("Pictures")) }
+pub fn public_dir()     -> Option<PathBuf> { home_dir().map(|h| h.join("Public")) }
+pub fn template_dir()   -> Option<PathBuf> { None }
+pub fn video_dir()      -> Option<PathBuf> { home_dir().map(|h| h.join("Movies")) }
diff --git a/third_party/rust/dirs/src/wasm.rs b/third_party/rust/dirs/src/wasm.rs
new file mode 100644
index 0000000000..b4a8dd2fb5
--- /dev/null
+++ b/third_party/rust/dirs/src/wasm.rs
@@ -0,0 +1,24 @@
+// Stub definitions to make things *compile*.
+
+use std::path::PathBuf;
+
+pub fn home_dir()       -> Option<PathBuf> { None }
+
+pub fn cache_dir()      -> Option<PathBuf> { None }
+pub fn config_dir()     -> Option<PathBuf> { None }
+pub fn data_dir()       -> Option<PathBuf> { None }
+pub fn data_local_dir() -> Option<PathBuf> { None }
+pub fn preference_dir() -> Option<PathBuf> { None }
+pub fn runtime_dir()    -> Option<PathBuf> { None }
+pub fn executable_dir() -> Option<PathBuf> { None }
+pub fn state_dir()      -> Option<PathBuf> { None }
+
+pub fn audio_dir()      -> Option<PathBuf> { None }
+pub fn desktop_dir()    -> Option<PathBuf> { None }
+pub fn document_dir()   -> Option<PathBuf> { None }
+pub fn download_dir()   -> Option<PathBuf> { None }
+pub fn font_dir()       -> Option<PathBuf> { None }
+pub fn picture_dir()    -> Option<PathBuf> { None }
+pub fn public_dir()     -> Option<PathBuf> { None }
+pub fn template_dir()   -> Option<PathBuf> { None }
+pub fn video_dir()      -> Option<PathBuf> { None }
diff --git a/third_party/rust/dirs/src/win.rs b/third_party/rust/dirs/src/win.rs
new file mode 100644
index 0000000000..f28693c01c
--- /dev/null
+++ b/third_party/rust/dirs/src/win.rs
@@ -0,0 +1,24 @@
+extern crate dirs_sys;
+
+use std::path::PathBuf;
+
+pub fn home_dir()       -> Option<PathBuf> { dirs_sys::known_folder_profile() }
+
+pub fn data_dir()       -> Option<PathBuf> { dirs_sys::known_folder_roaming_app_data() }
+pub fn data_local_dir() -> Option<PathBuf> { dirs_sys::known_folder_local_app_data() }
+pub fn cache_dir()      -> Option<PathBuf> { data_local_dir() }
+pub fn config_dir()     -> Option<PathBuf> { data_dir() }
+pub fn executable_dir() -> Option<PathBuf> { None }
+pub fn preference_dir() -> Option<PathBuf> { data_dir() }
+pub fn runtime_dir()    -> Option<PathBuf> { None }
+pub fn state_dir()      -> Option<PathBuf> { None }
+
+pub fn audio_dir()      -> Option<PathBuf> { dirs_sys::known_folder_music() }
+pub fn desktop_dir()    -> Option<PathBuf> { dirs_sys::known_folder_desktop() }
+pub fn document_dir()   -> Option<PathBuf> { dirs_sys::known_folder_documents() }
+pub fn download_dir()   -> Option<PathBuf> { dirs_sys::known_folder_downloads() }
+pub fn font_dir()       -> Option<PathBuf> { None }
+pub fn picture_dir()    -> Option<PathBuf> { dirs_sys::known_folder_pictures() }
+pub fn public_dir()     -> Option<PathBuf> { dirs_sys::known_folder_public()}
+pub fn template_dir()   -> Option<PathBuf> { dirs_sys::known_folder_templates() }
+pub fn video_dir()      -> Option<PathBuf> { dirs_sys::known_folder_videos() }