foster/denoland-rusty-v8
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build: add PYTHON envvar to specify your python binary (#1202)

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Levente Kurusa 2023-03-21 17:11:44 +01:00 committed by GitHub
parent 8216c9e435
commit af75d6d8a2
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2 changed files with 22 additions and 5 deletions
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8
README.md
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@ -98,7 +98,9 @@ cargo build
Use `V8_FROM_SOURCE=1 cargo build -vv` to build the crate completely from
source.
The build scripts require Python 3 to be available as `python` in your `PATH`.
The build scripts require Python 3 to be available as `python3` in your `PATH`.
If you want to specify the exact binary of Python to use, you should use the
`PYTHON` environment variable.
The build also requires `curl` to be installed on your system.
@ -109,6 +111,10 @@ install them.
For Windows builds: the 64-bit toolchain needs to be used. 32-bit targets are
not supported.
For Mac builds: You'll need Xcode and Xcode CLT installed. Recent macOS versions
will also require you to pass PYTHON=python3 because macOS no longer ships with
`python` simlinked to Python 3.
The build depends on several binary tools: `gn`, `ninja` and `clang`. The tools
will automatically be downloaded, if they are not detected in the environment.

19
build.rs
View file

@ -34,6 +34,7 @@ fn main() {
"SCCACHE",
"V8_FORCE_DEBUG",
"V8_FROM_SOURCE",
"PYTHON",
];
for env in envs {
println!("cargo:rerun-if-env-changed={}", env);
@ -215,6 +216,7 @@ fn build_v8() {
fn print_gn_args(gn_out_dir: &Path) {
assert!(Command::new(gn())
.arg(format!("--script-executable={}", python()))
.arg("args")
.arg(gn_out_dir)
.arg("--list")
@ -239,7 +241,7 @@ fn maybe_clone_repo(dest: &str, repo: &str) {
fn maybe_install_sysroot(arch: &str) {
let sysroot_path = format!("build/linux/debian_sid_{}-sysroot", arch);
if !PathBuf::from(sysroot_path).is_dir() {
assert!(Command::new("python")
assert!(Command::new(python())
.arg("./build/linux/sysroot_scripts/install-sysroot.py")
.arg(format!("--arch={}", arch))
.status()
@ -277,7 +279,7 @@ fn download_ninja_gn_binaries() {
let ninja = ninja.with_extension("exe");
if !gn.exists() || !ninja.exists() {
assert!(Command::new("python")
assert!(Command::new(python())
.arg("./tools/ninja_gn_binaries.py")
.arg("--dir")
.arg(&target_dir)
@ -382,7 +384,7 @@ fn download_file(url: String, filename: PathBuf) {
// Try downloading with python first. Python is a V8 build dependency,
// so this saves us from adding a Rust HTTP client dependency.
println!("Downloading {}", url);
let status = Command::new("python")
let status = Command::new(python())
.arg("./tools/download_file.py")
.arg("--url")
.arg(&url)
@ -531,7 +533,7 @@ fn find_compatible_system_clang() -> Option<PathBuf> {
fn clang_download() -> PathBuf {
let clang_base_path = build_dir().join("clang");
println!("clang_base_path {}", clang_base_path.display());
assert!(Command::new("python")
assert!(Command::new(python())
.arg("./tools/clang/scripts/update.py")
.arg("--output-dir")
.arg(&clang_base_path)
@ -638,6 +640,14 @@ fn gn() -> String {
env::var("GN").unwrap_or_else(|_| "gn".to_owned())
}
/*
* Get the system's python binary - specified via the PYTHON environment
* variable or defaulting to `python3`.
*/
fn python() -> String {
env::var("PYTHON").unwrap_or_else(|_| "python3".to_owned())
}
type NinjaEnv = Vec<(String, String)>;
fn ninja(gn_out_dir: &Path, maybe_env: Option<NinjaEnv>) -> Command {
@ -671,6 +681,7 @@ pub fn maybe_gen(manifest_dir: &str, gn_args: GnArgs) -> PathBuf {
);
assert!(Command::new(gn())
.arg(format!("--root={}", dirs.root.display()))
.arg(format!("--script-executable={}", python()))
.arg("gen")
.arg(&gn_out_dir)
.arg("--args=".to_owned() + &args)