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47730239f5
stylo_test's build script is split between Python and Rust. style's build script already has to perform complicated dances to determine an appropriate binary to execute, depending on the platform. To avoid copying and pasting that code, it seems reasonable to simply port the Python code into Rust, thus making the relationship between generated files and the cargo dependency output clearer. The new Rust is somewhat more verbose, but not terribly so.
70 lines
2.5 KiB
Rust
70 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 http://mozilla.org/MPL/2.0/. */
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extern crate regex;
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use regex::Regex;
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use std::env;
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use std::fs::File;
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use std::io::{BufRead, BufReader, Write};
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use std::path::Path;
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fn main() {
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let root_path = Path::new("../../../");
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let bindings_file = root_path.join("components/style/gecko/generated/bindings.rs");
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let glue_file = root_path.join("ports/geckolib/glue.rs");
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println!("cargo:rerun-if-changed=build.rs");
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println!("cargo:rerun-if-changed={}", glue_file.display());
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println!("cargo:rerun-if-changed={}", bindings_file.display());
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let env_out_dir = env::var("OUT_DIR").unwrap();
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let out_dir = Path::new(&env_out_dir);
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{
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let output = out_dir.join("check_bindings.rs");
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let r = BufReader::new(File::open(bindings_file).unwrap());
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let mut w = File::create(output).unwrap();
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w.write_all(b"fn assert_types() {\n").unwrap();
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let matcher = Regex::new(r"fn\s*Servo_([a-zA-Z0-9_]+)\s*\(").unwrap();
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for line in r.lines() {
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let s = line.unwrap();
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for cap in matcher.captures_iter(&s) {
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// GetStyleVariables is a Servo_* function, but temporarily defined
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// on the Gecko side.
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if &cap[1] != "GetStyleVariables" {
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w.write_all(format!(" [ Servo_{0}, bindings::Servo_{0} ];\n", &cap[1]).as_bytes()).unwrap();
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}
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}
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}
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w.write_all(b"}\n").unwrap();
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}
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{
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let output = out_dir.join("glue.rs");
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let r = BufReader::new(File::open(glue_file).unwrap());
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let mut w = File::create(output).unwrap();
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w.write_all(b"pub use style::gecko::arc_types::*;\n").unwrap();
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for line in r.lines() {
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let s = line.unwrap().replace("pub extern \"C\" fn", "pub unsafe extern \"C\" fn");
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w.write_all(s.as_bytes()).unwrap();
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w.write_all(b"\n").unwrap();
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}
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}
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// https://github.com/rust-lang/cargo/issues/3544
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let style_out_dir = env::var_os("DEP_FOR SOME REASON THE LINKS KEY IS REQUIRED \
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TO PASS DATA AROUND BETWEEN BUILD SCRIPTS_OUT_DIR").unwrap();
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File::create(out_dir.join("bindings.rs"))
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.unwrap()
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.write_all(format!("include!(concat!({:?}, \"/gecko/structs_debug.rs\"));",
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style_out_dir).as_bytes())
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.unwrap();
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}
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