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use std::process::{Command, Stdio};
use std::path::{PathBuf, Path};
use std::borrow::Cow;
use std::{env, fs};
#[derive(Debug, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
pub struct ResourceCompiler {
compiler: Option<Compiler>,
}
impl ResourceCompiler {
pub fn new() -> ResourceCompiler {
ResourceCompiler { compiler: Compiler::probe() }
}
#[inline]
pub fn is_supported(&self) -> bool {
self.compiler.is_some()
}
pub fn compile_resource(&self, out_dir: &str, prefix: &str, resource: &str) {
self.compiler.as_ref().expect("Not supported but we got to compile_resource()?").compile(out_dir, prefix, resource)
}
}
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
enum CompilerType {
LlvmRc,
WindRes,
}
#[derive(Debug, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
struct Compiler {
tp: CompilerType,
executable: Cow<'static, str>,
}
impl Compiler {
pub fn probe() -> Option<Compiler> {
let target = env::var("TARGET").ok()?;
if let Some(rc) = env::var(&format!("RC_{}", target))
.or_else(|_| env::var(&format!("RC_{}", target.replace('-', "_"))))
.or_else(|_| env::var("RC"))
.ok() {
return Some(guess_compiler_variant(&rc));
}
if target.ends_with("-pc-windows-gnu") {
let executable = format!("{}-w64-mingw32-windres", &target[0..target.find('-').unwrap_or_default()]);
if is_runnable(&executable) {
return Some(Compiler {
tp: CompilerType::WindRes,
executable: executable.into(),
});
}
} else if target.ends_with("-pc-windows-msvc") {
if is_runnable("llvm-rc") {
return Some(Compiler {
tp: CompilerType::LlvmRc,
executable: "llvm-rc".into(),
});
}
}
None
}
pub fn compile(&self, out_dir: &str, prefix: &str, resource: &str) {
match self.tp {
CompilerType::LlvmRc => {
let out_file = format!("{}/{}.lib", out_dir, prefix);
let preprocessed_path = format!("{}/{}-preprocessed.rc", out_dir, prefix);
fs::write(&preprocessed_path,
cc::Build::new()
.define("RC_INVOKED", None)
.file(resource)
.cargo_metadata(false)
.include(out_dir)
.expand())
.unwrap();
try_command(Command::new(&self.executable[..])
.args(&["/fo", &out_file, &preprocessed_path])
.stdin(Stdio::piped())
.current_dir(Path::new(resource).parent().expect("Resource parent nonexistent?")),
Path::new(&self.executable[..]),
"compile",
&preprocessed_path,
&out_file);
}
CompilerType::WindRes => {
let out_file = format!("{}/lib{}.a", out_dir, prefix);
try_command(Command::new(&self.executable[..]).args(&["--input", resource, "--output-format=coff", "--output", &out_file, "--include-dir", out_dir]),
Path::new(&self.executable[..]),
"compile",
resource,
&out_file)
}
}
}
}
fn try_command(cmd: &mut Command, exec: &Path, action: &str, whom: &str, whre: &str) {
match cmd.status() {
Ok(stat) if stat.success() => {}
Ok(stat) => panic!("{} failed to {} \"{}\" into \"{}\" with {}", exec.display(), action, whom, whre, stat),
Err(e) => panic!("Couldn't execute {} to {} \"{}\" into \"{}\": {}", exec.display(), action, whom, whre, e),
}
}
fn guess_compiler_variant(s: &str) -> Compiler {
match Command::new(s).args(&["-V", "/?"]).output() {
Ok(out) => {
if out.stdout.starts_with(b"GNU windres") {
Compiler {
executable: s.to_string().into(),
tp: CompilerType::WindRes,
}
} else if out.stdout.starts_with(b"OVERVIEW: Resource Converter") {
Compiler {
executable: s.to_string().into(),
tp: CompilerType::LlvmRc,
}
} else {
panic!("Unknown RC compiler variant: {}", s)
}
}
Err(err) => panic!("Couldn't execute {}: {}", s, err),
}
}
fn is_runnable(s: &str) -> bool {
Command::new(s).spawn().map(|mut c| c.kill()).is_ok()
}
pub fn find_windows_sdk_tool_impl(_: &str) -> Option<PathBuf> {
None
}