1
2 extern crate libc;
3
4 use std::io;
5 use std::env;
6 use std::cmp;
7 use std::path::{Path, PathBuf};
8 use std::fs;
9 use std::os::unix::fs::MetadataExt;
10 use std::process::Command;
11
12
visit_xml<F>(xml_dir: &Path, cb: F) -> io::Result<()> where F: Fn(&Path) -> io::Result<()>13 fn visit_xml<F>(xml_dir: &Path, cb: F) -> io::Result<()>
14 where F: Fn(&Path) -> io::Result<()> {
15 if try!(fs::metadata(xml_dir)).is_dir() {
16 for entry in try!(fs::read_dir(xml_dir)) {
17 let path = try!(entry).path();
18 if try!(fs::metadata(&path)).is_file() {
19 if let Some(ext) = path.extension() {
20 if ext == "xml" { try!(cb(&path)); }
21 }
22 }
23 }
24 }
25 Ok(())
26 }
27
28
xml_to_rs(rs_dir: &Path, xml_file: &Path) -> PathBuf29 fn xml_to_rs (rs_dir: &Path, xml_file: &Path) -> PathBuf {
30 let mut path = PathBuf::from(&rs_dir);
31 path.push(xml_file.file_stem().unwrap());
32 path.set_extension("rs");
33 path
34 }
35
optional_mtime(path: &Path, default: i64) -> i6436 fn optional_mtime (path: &Path, default: i64) -> i64 {
37 if let Ok(md) = fs::metadata(&path) {
38 md.mtime()
39 } else {
40 default
41 }
42 }
43
main()44 fn main() {
45 let root = env::var("CARGO_MANIFEST_DIR").unwrap();
46 let r_client = Path::new(&root).join("rs_client.py");
47 let build_rs = Path::new(&root).join("build.rs");
48 let xml_dir = Path::new(&root).join("xml");
49 let src_dir = Path::new(&root).join("src");
50 let src_ffi_dir = Path::new(&src_dir).join("ffi");
51 let out_dir = env::var("OUT_DIR").unwrap();
52
53 let r_client_mtime = fs::metadata(&r_client).unwrap().mtime();
54 let build_rs_mtime = fs::metadata(&build_rs).unwrap().mtime();
55 let ref_mtime = cmp::max(r_client_mtime, build_rs_mtime);
56
57 visit_xml(&xml_dir, |xml_file: &Path| -> io::Result<()> {
58 let src_file = xml_to_rs(&src_dir, &xml_file);
59 let ffi_file = xml_to_rs(&src_ffi_dir, &xml_file);
60 let xml_file_mtime = try!(fs::metadata(&xml_file)).mtime();
61 let src_file_mtime = optional_mtime(&src_file, 0);
62 let ffi_file_mtime = optional_mtime(&ffi_file, 0);
63
64 let ref_mtime = cmp::max(ref_mtime, xml_file_mtime);
65
66 if ref_mtime > src_file_mtime || ref_mtime > ffi_file_mtime {
67
68 let status = Command::new("python3.8")
69 .arg("-B") // disable __pycache__ dir that messes with cargo
70 .arg(&r_client)
71 .arg("-o").arg(&out_dir)
72 .arg(&xml_file)
73 .env("PYTHONHASHSEED", "0")
74 .status()
75 .expect("Unable to find build dependency python3");
76 if !status.success() {
77 panic!("processing of {} returned non-zero ({})",
78 xml_file.display(), status.code().unwrap());
79 }
80 }
81 Ok(())
82 }).unwrap();
83
84
85 let xcbgen_dir = Path::new(&root).join("xcbgen");
86
87 println!("cargo:rerun-if-changed={}", &build_rs.display());
88 println!("cargo:rerun-if-changed={}", &r_client.display());
89 println!("cargo:rerun-if-changed={}", &xml_dir.display());
90 println!("cargo:rerun-if-changed={}", &xcbgen_dir.display());
91
92 }
93