1 files changed, 90 insertions, 0 deletions
diff --git a/third_party/rust/glean/src/system.rs b/third_party/rust/glean/src/system.rs
new file mode 100644
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+++ b/third_party/rust/glean/src/system.rs
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+// Copyright (c) 2017 The Rust Project Developers
+// Copyright (c) 2018-2020 The Rust Secure Code Working Group
+// Licensed under the MIT License.
+// Original license:
+// https://github.com/rustsec/rustsec/blob/2a080f173ad9d8ac7fa260f0a3a6aebf0000de06/platforms/LICENSE-MIT
+//
+// 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.
+
+//! Detect and expose `target_arch` as a constant
+
+#[cfg(target_arch = "aarch64")]
+/// `target_arch` when building this crate: `aarch64`
+pub const ARCH: &str = "aarch64";
+
+#[cfg(target_arch = "arm")]
+/// `target_arch` when building this crate: `arm`
+pub const ARCH: &str = "arm";
+
+#[cfg(target_arch = "x86")]
+/// `target_arch` when building this crate: `x86`
+pub const ARCH: &str = "x86";
+
+#[cfg(target_arch = "x86_64")]
+/// `target_arch` when building this crate: `x86_64`
+pub const ARCH: &str = "x86_64";
+
+#[cfg(not(any(
+    target_arch = "aarch64",
+    target_arch = "arm",
+    target_arch = "x86",
+    target_arch = "x86_64"
+)))]
+/// `target_arch` when building this crate: unknown!
+pub const ARCH: &str = "Unknown";
+
+#[cfg(any(target_os = "macos", target_os = "windows"))]
+/// Returns Darwin kernel version for MacOS, or NT Kernel version for Windows
+pub fn get_os_version() -> String {
+    whatsys::kernel_version().unwrap_or_else(|| "Unknown".to_owned())
+}
+
+#[cfg(not(any(target_os = "linux", target_os = "macos", target_os = "windows")))]
+/// Returns "Unknown" for platforms other than Linux, MacOS or Windows
+pub fn get_os_version() -> String {
+    "Unknown".to_owned()
+}
+
+#[cfg(target_os = "linux")]
+/// Returns Linux kernel version, in the format of <Major>.<Minor> e.g. 5.8
+pub fn get_os_version() -> String {
+    parse_linux_os_string(whatsys::kernel_version().unwrap_or_else(|| "Unknown".to_owned()))
+}
+
+#[cfg(target_os = "linux")]
+fn parse_linux_os_string(os_str: String) -> String {
+    os_str.split('.').take(2).collect::<Vec<&str>>().join(".")
+}
+
+#[test]
+#[cfg(target_os = "linux")]
+fn parse_fixed_linux_os_string() {
+    let alpine_os_string = "4.12.0-rc6-g48ec1f0-dirty".to_owned();
+    assert_eq!(parse_linux_os_string(alpine_os_string), "4.12");
+    let centos_os_string = "3.10.0-514.16.1.el7.x86_64".to_owned();
+    assert_eq!(parse_linux_os_string(centos_os_string), "3.10");
+    let ubuntu_os_string = "5.8.0-44-generic".to_owned();
+    assert_eq!(parse_linux_os_string(ubuntu_os_string), "5.8");
+}