mirror of
https://github.com/servo/servo.git
synced 2025-08-02 12:10:29 +01:00
71 lines
2.5 KiB
Rust
71 lines
2.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use std::path::{Path, PathBuf};
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use std::process::Command;
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use std::{env, fs};
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fn main() {
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if cfg!(feature = "media-gstreamer") {
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println!("cargo:rerun-if-changed=../../python/servo/gstreamer.py");
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let output = Command::new(find_python())
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.arg("../../python/servo/gstreamer.py")
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.arg(std::env::var_os("TARGET").unwrap())
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.output()
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.unwrap();
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if !output.status.success() {
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eprintln!("{}", String::from_utf8_lossy(&output.stdout));
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eprintln!("{}", String::from_utf8_lossy(&output.stderr));
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std::process::exit(1)
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}
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let path = Path::new(&env::var_os("OUT_DIR").unwrap()).join("gstreamer_plugins.rs");
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fs::write(path, output.stdout).unwrap();
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}
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}
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/// Tries to find a suitable python
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///
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/// Algorithm
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/// 1. Trying to find python3/python in $VIRTUAL_ENV (this should be from servos venv)
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/// 2. Checking PYTHON3 (set by mach)
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/// 3. Falling back to the system installation.
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///
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/// Note: This function should be kept in sync with the version in `components/script/build.rs`
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fn find_python() -> PathBuf {
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let mut candidates = vec![];
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if let Some(venv) = env::var_os("VIRTUAL_ENV") {
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// See: https://docs.python.org/3/library/venv.html#how-venvs-work
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let bin_dir = if cfg!(windows) { "Scripts" } else { "bin" };
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let bin_directory = PathBuf::from(venv).join(bin_dir);
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candidates.push(bin_directory.join("python3"));
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candidates.push(bin_directory.join("python"));
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}
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if let Some(python3) = env::var_os("PYTHON3") {
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candidates.push(PathBuf::from(python3));
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}
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let system_python = ["python3", "python"].map(PathBuf::from);
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candidates.extend_from_slice(&system_python);
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for name in &candidates {
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// Command::new() allows us to omit the `.exe` suffix on windows
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if Command::new(name)
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.arg("--version")
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.output()
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.is_ok_and(|out| out.status.success())
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{
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return name.to_owned();
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}
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}
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let candidates = candidates
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.into_iter()
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.map(|c| c.into_os_string())
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.collect::<Vec<_>>();
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panic!(
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"Can't find python (tried {:?})! Try enabling Servo's Python venv, \
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setting the PYTHON3 env var or adding python3 to PATH.",
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candidates.join(", ".as_ref())
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)
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}
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