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script codegen: Avoid modifying in-place a generated file.

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Simon Sapin 2017-01-19 17:13:35 +01:00
parent 71fb02953c
commit 0b9ff576e0
5 changed files with 29 additions and 34 deletions
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34
components/script/build.rs
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@ -5,13 +5,13 @@
extern crate cmake;
extern crate phf_codegen;
extern crate phf_shared;
extern crate regex;
extern crate serde_json;
use regex::Regex;
use serde_json::Value;
use std::env;
use std::fmt;
use std::fs::File;
use std::io::{Read, Write};
use std::io::Write;
use std::path::PathBuf;
use std::time::Instant;
@ -44,27 +44,17 @@ fn main() {
println!("Binding generation completed in {}s", start.elapsed().as_secs());
convert_phf();
}
fn convert_phf() {
let filename = PathBuf::from(env::var("OUT_DIR").unwrap()).join("InterfaceObjectMap.rs");
let mut source = String::new();
File::open(&filename).unwrap().read_to_string(&mut source).unwrap();
let map_macro = Regex::new("phf_map! \\{([^}]+)\\}").unwrap().captures(&source).unwrap();
let entries_re = Regex::new("b\"([^\"]+)\" => ([^\n]+),\n").unwrap();
let entries = entries_re.captures_iter(&map_macro[1]);
let json = PathBuf::from(env::var("OUT_DIR").unwrap()).join("build").join("InterfaceObjectMapData.json");
let json: Value = serde_json::from_reader(File::open(&json).unwrap()).unwrap();
let mut map = phf_codegen::Map::new();
for entry in entries {
map.entry(Bytes(entry.get(1).unwrap().as_str()), entry.get(2).unwrap().as_str());
for (key, value) in json.as_object().unwrap() {
map.entry(Bytes(key), value.as_str().unwrap());
}
let mut file = File::create(&filename).unwrap();
let map_macro = map_macro.get(0).unwrap();
file.write_all(source[..map_macro.start()].as_bytes()).unwrap();
map.build(&mut file).unwrap();
file.write_all(source[map_macro.end()..].as_bytes()).unwrap();
let phf = PathBuf::from(env::var("OUT_DIR").unwrap()).join("InterfaceObjectMapPhf.rs");
let mut phf = File::create(&phf).unwrap();
write!(&mut phf, "pub static MAP: phf::Map<&'static [u8], unsafe fn(*mut JSContext, HandleObject)> = ").unwrap();
map.build(&mut phf).unwrap();
write!(&mut phf, ";\n").unwrap();
}
#[derive(Eq, PartialEq, Hash)]