Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

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

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+[![crates.io](https://img.shields.io/crates/v/dirs-next.svg)](https://crates.io/crates/dirs-next)
+[![API documentation](https://docs.rs/dirs-next/badge.svg)](https://docs.rs/dirs-next/)
+
+# `dirs-next`
+
+**Note**: This is a fork of once-abandoned `dirs` crate.
+
+There is a mid-level sister library, [directories-next].
+
+## 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.
+
+## Minimum Rust version policy
+
+The minimal required version of Rust is `1.34.0`.
+
+We may bump the Rust version in major and minor releases (`x`/`y` in `x.y.z`).
+Changing the Rust version will be written in the CHANGELOG.
+
+## Example
+
+Library run by user Alice:
+
+```rust
+dirs_next::home_dir();
+// Lin: Some(/home/alice)
+// Win: Some(C:\Users\Alice)
+// Mac: Some(/Users/Alice)
+
+dirs_next::audio_dir();
+// Lin: Some(/home/alice/Music)
+// Win: Some(C:\Users\Alice\Music)
+// Mac: Some(/Users/Alice/Music)
+
+dirs_next::config_dir();
+// Lin: Some(/home/alice/.config)
+// Win: Some(C:\Users\Alice\AppData\Roaming)
+// Mac: Some(/Users/Alice/Library/Application Support)
+
+dirs_next::executable_dir();
+// Lin: Some(/home/alice/.local/bin)
+// Win: None
+// Mac: None
+```
+
+## Design Goals
+
+- The _dirs-next_ library is a low-level crate designed to provide the paths to standard directories
+  as defined by operating systems rules or conventions. If your requirements are more complex,
+  e. g. computing cache, config, etc. paths for specific applications or projects, consider using
+  [directories-next] 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. 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.
+  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, that would
+  outweigh the confusion and unexpected failures such an approach would cause.
+  - `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-next] 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($XDG_BIN_HOME`/../bin`)`  or `Some($XDG_DATA_HOME`/../bin`)` or `Some($HOME`/.local/bin`)` | `None`                            | `None`                                      |
+| `runtime_dir`    | `Some($XDG_RUNTIME_DIR)`        or `None`                                                        | `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.
+
+| Library               | Status         | Lin | Mac | Win |Base|User|Proj|Conv|
+| --------------------- | -------------- |:---:|:---:|:---:|:--:|:--:|:--:|:--:|
+| `app_dirs`            | Unmaintained   |  ✔  |  ✔  |  ✔  | 🞈  | ✖  | ✔  | ✖  |
+| `app_dirs2`           | Maintained     |  ✔  |  ✔  |  ✔  | 🞈  | ✖  | ✔  | ✖  |
+| **dirs-next**         | **Developed**  |  ✔  |  ✔  |  ✔  | ✔  | ✔  | ✖  | ✔  |
+| `directories-next`    | Developed      |  ✔  |  ✔  |  ✔  | ✔  | ✔  | ✔  | ✔  |
+| `s_app_dir`           | Unmaintained?  |  ✔  |  ✖  |  🞈  | ✖  | ✖  | 🞈  | ✖  |
+| `standard_paths`      | Maintained     |  ✔  |  ✖  |  ✔  | ✔  | ✔  | ✔  | ✖  |
+| `xdg`                 | Maintained     |  ✔  |  ✖  |  ✖  | ✔  | ✖  | ✔  | 🞈  |
+| `xdg-basedir`         | Unmaintained?  |  ✔  |  ✖  |  ✖  | ✔  | ✖  | ✖  | 🞈  |
+| `xdg-rs`              | Obsolete       |  ✔  |  ✖  |  ✖  | ✔  | ✖  | ✖  | 🞈  |
+
+- Lin: Linux support
+- Mac: macOS support
+- Win: Windows support
+- Base: Supports [generic base directories](https://github.com/xdg-rs/dirs/tree/master/directories#basedirs)
+- User: Supports [user directories](https://github.com/xdg-rs/dirs/tree/master/directories#userdirs)
+- Proj: Supports [project-specific base directories](https://github.com/xdg-rs/dirs/tree/master/directories#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:
+
+```console
+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
+```
+
+## 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.
+
+[directories-next]: https://github.com/xdg-rs/dirs/tree/master/directories