Vendor dependencies

Let's see how I like this workflow.

vendor/android_system_properties/.cargo-checksum.json

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+{"files":{"CONTRIBUTING.md":"0834cb3b5e092977688d73d219a05bed23ae0ecb54b6d6e5d866ce07f6583b5e","Cargo.lock":"37ffc00dbbbec58fd27b4f4cb597e5402d6cf615ce0458f62a73a7f0d987e5bd","Cargo.toml":"e9e8c037cdef7adc9794b17c13e5a014421524d67ea5048bc09cf70ef13c782c","LICENSE-APACHE":"216486f29671a4262efe32af6d84a75bef398127f8c5f369b5c8305983887a06","LICENSE-MIT":"80f275e90d799911ed3830a7f242a2ef5a4ade2092fe0aa07bfb2d2cf2f2b95e","README.md":"aba8ff5dbd0712326d97d32bc6a3b66b24d1980a446c238f7e14b96784766cd1","examples/time_zone.rs":"8edb32a946ef2680146ba9ac16c233dd94391ac9f98464e9fb6f87d3954b72a9","src/lib.rs":"0004133d6c3805bf449e7183d2931e9640167511bea6cd12b400805073c4305d"},"package":"819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"}

vendor/android_system_properties/CONTRIBUTING.md

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+# Contributing
+
+Contributions are very much welcome. Here are the guidelines if you are thinking of helping us:
+
+## Contributions
+
+Contributions should be made in the form of GitHub pull requests.
+Each pull request will be reviewed by a core contributor (someone with
+permission to land patches) and either landed in the main tree or
+given feedback for changes that would be required.
+
+Should you wish to work on an issue, please claim it first by commenting on
+the GitHub issue that you want to work on it. This is to prevent duplicated
+efforts from contributors on the same issue.
+
+## Pull Request Checklist
+
+- Branch from the master branch and, if needed, rebase to the current master
+  branch before submitting your pull request. If it doesn't merge cleanly with
+  master you may be asked to rebase your changes.
+
+- Commits should be as small as possible, while ensuring that each commit is
+  correct independently (i.e., each commit should compile and pass tests).
+
+- If your patch is not getting reviewed or you need a specific person to review
+  it, you can @-reply a reviewer asking for a review in the pull request or a
+  comment.
+
+- Whenever applicable, add tests relevant to the fixed bug or new feature.
+
+For specific git instructions, see [GitHub workflow 101](https://github.com/servo/servo/wiki/Github-workflow).
+
+## Conduct
+
+We follow the [Rust Code of Conduct](http://www.rust-lang.org/conduct.html).
+For escalation or moderation issues, please contact Nical (nical@fastmail.com) instead of the Rust moderation team.
+
+## License
+
+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 licensed dual MIT/Apache 2, without any additional terms or conditions.

vendor/android_system_properties/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.126"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"

vendor/android_system_properties/Cargo.toml

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+# 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]
+edition = "2018"
+name = "android_system_properties"
+version = "0.1.5"
+authors = ["Nicolas Silva <nical@fastmail.com>"]
+description = "Minimal Android system properties wrapper"
+homepage = "https://github.com/nical/android_system_properties"
+documentation = "https://docs.rs/android_system_properties"
+readme = "README.md"
+keywords = ["android"]
+license = "MIT/Apache-2.0"
+repository = "https://github.com/nical/android_system_properties"
+
+[package.metadata.docs.rs]
+targets = [
+    "arm-linux-androideabi",
+    "armv7-linux-androideabi",
+    "aarch64-linux-android",
+    "i686-linux-android",
+    "x86_64-linux-android",
+    "x86_64-unknown-linux-gnu",
+]
+
+[dependencies.libc]
+version = "0.2.126"

vendor/android_system_properties/LICENSE-APACHE

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+Copyright 2016 Nicolas Silva
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

vendor/android_system_properties/LICENSE-MIT

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+The MIT License (MIT)
+
+Copyright (c) 2013 Nicolas Silva
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/android_system_properties/README.md

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+# android_system_properties
+
+A thin rust wrapper for Android system properties.
+
+This crate is similar to the `android-properties` crate with the exception that
+the necessary Android libc symbols are loaded dynamically instead of linked
+statically. In practice this means that the same binary will work with old and
+new versions of Android, even though the API for reading system properties changed
+around Android L.
+
+## Example
+
+```rust
+use android_system_properties::AndroidSystemProperties;
+
+let properties = AndroidSystemProperties::new();
+
+if let Some(value) = properties.get("persist.sys.timezone") {
+   println!("{}", value);
+}
+```
+
+## Listing and setting properties
+
+For the sake of simplicity this crate currently only contains what's needed by wgpu.
+The implementations for listing and setting properties can be added back if anyone needs
+them (let me know by filing an issue).
+
+## 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.

vendor/android_system_properties/examples/time_zone.rs

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+/// Prints the current time zone, e.g. "Europe/Paris".
+
+use android_system_properties::AndroidSystemProperties;
+
+fn main() {
+    let android_system_properties = AndroidSystemProperties::new();
+    let tz = android_system_properties.get("persist.sys.timezone");
+    println!("Your time zone is: {}", tz.as_deref().unwrap_or("<unknown>"));
+}

vendor/android_system_properties/src/lib.rs

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+//! A thin rust wrapper for Android system properties.
+//!
+//! This crate is similar to the `android-properties` crate with the exception that
+//! the necessary Android libc symbols are loaded dynamically instead of linked
+//! statically. In practice this means that the same binary will work with old and
+//! new versions of Android, even though the API for reading system properties changed
+//! around Android L.
+//!
+//! ## Example
+//!
+//! ```rust
+//! use android_system_properties::AndroidSystemProperties;
+//!
+//! let properties = AndroidSystemProperties::new();
+//!
+//! if let Some(value) = properties.get("persist.sys.timezone") {
+//!    println!("{}", value);
+//! }
+//! ```
+//!
+//! ## Listing and setting properties
+//!
+//! For the sake of simplicity this crate currently only contains what's needed by wgpu.
+//! The implementations for listing and setting properties can be added back if anyone needs
+//! them (let me know by filing an issue).
+//!
+//! ## License
+//!
+//! Licensed under either of
+//!
+//!  * Apache License, Version 2.0 ([LICENSE-APACHE] or <http://www.apache.org/licenses/LICENSE-2.0>)
+//!  * MIT license ([LICENSE-MIT] or <http://opensource.org/licenses/MIT>)
+//!
+//! at your option.
+//!
+//! [LICENSE-APACHE]: https://github.com/nical/android_system_properties/blob/804681c5c1c93d4fab29c1a2f47b7d808dc70fd3/LICENSE-APACHE
+//! [LICENSE-MIT]: https://github.com/nical/android_system_properties/blob/804681c5c1c93d4fab29c1a2f47b7d808dc70fd3/LICENSE-MIT
+
+use std::{
+    ffi::{CStr, CString},
+    os::raw::{c_char, c_int, c_void},
+};
+
+#[cfg(target_os = "android")]
+use std::mem;
+
+unsafe fn property_callback(payload: *mut String, _name: *const c_char, value: *const c_char, _serial: u32) {
+    let cvalue = CStr::from_ptr(value);
+    (*payload) = cvalue.to_str().unwrap().to_string();
+}
+
+type Callback = unsafe fn(*mut String, *const c_char, *const c_char, u32);
+
+type SystemPropertyGetFn = unsafe extern "C" fn(*const c_char, *mut c_char) -> c_int;
+type SystemPropertyFindFn = unsafe extern "C" fn(*const c_char) -> *const c_void;
+type SystemPropertyReadCallbackFn = unsafe extern "C" fn(*const c_void, Callback, *mut String) -> *const c_void;
+
+#[derive(Debug)]
+/// An object that can retrieve android system properties.
+///
+/// ## Example
+///
+/// ```
+/// use android_system_properties::AndroidSystemProperties;
+///
+/// let properties = AndroidSystemProperties::new();
+///
+/// if let Some(value) = properties.get("persist.sys.timezone") {
+///    println!("{}", value);
+/// }
+/// ```
+pub struct AndroidSystemProperties {
+    libc_so: *mut c_void,
+    get_fn: Option<SystemPropertyGetFn>,
+    find_fn: Option<SystemPropertyFindFn>,
+    read_callback_fn: Option<SystemPropertyReadCallbackFn>,
+}
+
+unsafe impl Send for AndroidSystemProperties {}
+unsafe impl Sync for AndroidSystemProperties {}
+
+impl AndroidSystemProperties {
+    #[cfg(not(target_os = "android"))]
+    /// Create an entry point for accessing Android properties.
+    pub fn new() -> Self {
+        AndroidSystemProperties {
+            libc_so: std::ptr::null_mut(),
+            find_fn: None,
+            read_callback_fn: None,
+            get_fn: None,
+        }
+    }
+
+    #[cfg(target_os = "android")]
+    /// Create an entry point for accessing Android properties.
+    pub fn new() -> Self {
+        let libc_so = unsafe { libc::dlopen(b"libc.so\0".as_ptr().cast(), libc::RTLD_NOLOAD) };
+
+        let mut properties = AndroidSystemProperties {
+            libc_so,
+            find_fn: None,
+            read_callback_fn: None,
+            get_fn: None,
+        };
+
+        if libc_so.is_null() {
+            return properties;
+        }
+
+
+        unsafe fn load_fn(libc_so: *mut c_void, name: &[u8]) -> Option<*const c_void> {
+            let fn_ptr = libc::dlsym(libc_so, name.as_ptr().cast());
+
+            if fn_ptr.is_null() {
+                return None;
+            }
+
+            Some(fn_ptr)
+        }
+
+        unsafe {
+            properties.read_callback_fn = load_fn(libc_so, b"__system_property_read_callback\0")
+                .map(|raw| mem::transmute::<*const c_void, SystemPropertyReadCallbackFn>(raw));
+
+            properties.find_fn = load_fn(libc_so, b"__system_property_find\0")
+                .map(|raw| mem::transmute::<*const c_void, SystemPropertyFindFn>(raw));
+
+            // Fallback for old versions of Android.
+            if properties.read_callback_fn.is_none() || properties.find_fn.is_none() {
+                properties.get_fn = load_fn(libc_so, b"__system_property_get\0")
+                    .map(|raw| mem::transmute::<*const c_void, SystemPropertyGetFn>(raw));
+            }
+        }
+
+        properties
+    }
+
+    /// Retrieve a system property.
+    ///
+    /// Returns None if the operation fails.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use android_system_properties::AndroidSystemProperties;
+    /// let properties = AndroidSystemProperties::new();
+    ///
+    /// if let Some(value) = properties.get("persist.sys.timezone") {
+    ///     println!("{}", value);
+    /// }
+    /// ```
+    pub fn get(&self, name: &str) -> Option<String> {
+        let cname = CString::new(name).ok()?;
+        self.get_from_cstr(&cname)
+    }
+
+    /// Retrieve a system property using a [`CStr`] key.
+    ///
+    /// Returns None if the operation fails.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use android_system_properties::AndroidSystemProperties;
+    /// # use std::ffi::CStr;
+    /// let properties = AndroidSystemProperties::new();
+    ///
+    /// let key = unsafe { CStr::from_bytes_with_nul_unchecked(b"persist.sys.timezone\0") };
+    /// if let Some(value) = properties.get_from_cstr(key) {
+    ///     println!("{}", value);
+    /// }
+    /// ```
+    pub fn get_from_cstr(&self, cname: &std::ffi::CStr) -> Option<String> {
+        // If available, use the recommended approach to accessing properties (Android L and onward).
+        if let (Some(find_fn), Some(read_callback_fn)) = (self.find_fn, self.read_callback_fn) {
+            let info = unsafe { (find_fn)(cname.as_ptr()) };
+
+            if info.is_null() {
+                return None;
+            }
+
+            let mut result = String::new();
+
+            unsafe {
+                (read_callback_fn)(info, property_callback, &mut result);
+            }
+
+            return Some(result);
+        }
+
+        // Fall back to the older approach.
+        if let Some(get_fn) = self.get_fn {
+            // The constant is PROP_VALUE_MAX in Android's libc/include/sys/system_properties.h
+            const PROPERTY_VALUE_MAX: usize = 92;
+            let mut buffer: Vec<u8> = Vec::with_capacity(PROPERTY_VALUE_MAX);
+            let raw = buffer.as_mut_ptr() as *mut c_char;
+
+            let len = unsafe { (get_fn)(cname.as_ptr(), raw) };
+
+            if len > 0 {
+                assert!(len as usize <= buffer.capacity());
+                unsafe { buffer.set_len(len as usize); }
+                String::from_utf8(buffer).ok()
+            } else {
+                None
+            }
+        } else {
+            None
+        }
+    }
+}
+
+impl Drop for AndroidSystemProperties {
+    fn drop(&mut self) {
+        if !self.libc_so.is_null() {
+            unsafe {
+                libc::dlclose(self.libc_so);
+            }
+        }
+    }
+}