11ba7e47fd
- when rustfmt is not detected (by attempting to run ``rustfmt --version) no formatting will be attempted - this should resolve issue mthom/scryer-prolog#1504
117 lines
3.5 KiB
Rust
117 lines
3.5 KiB
Rust
mod instructions_template;
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mod static_string_indexing;
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use instructions_template::generate_instructions_rs;
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use static_string_indexing::index_static_strings;
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use std::env;
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use std::fs;
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use std::fs::File;
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use std::io::Write;
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use std::path::Path;
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use std::process::{self, Command, Stdio};
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fn find_prolog_files(libraries: &mut File, prefix: &str, current_dir: &Path) {
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let entries = match current_dir.read_dir() {
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Ok(entries) => entries,
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Err(_) => return,
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};
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for entry in entries.filter_map(Result::ok).map(|e| e.path()) {
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if entry.is_dir() {
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if let Some(file_name) = entry.file_name() {
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let new_prefix = prefix.to_owned() + file_name.to_str().unwrap() + "/";
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find_prolog_files(libraries, &new_prefix, &entry);
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}
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} else if entry.is_file() {
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let ext = std::ffi::OsStr::new("pl");
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if entry.extension() == Some(ext) {
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let contain = String::from_utf8(fs::read(&entry).unwrap()).unwrap();
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let name = entry.file_stem().unwrap().to_str().unwrap();
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let line = format!(
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" m.insert(\"{}\",\n{:?});\n",
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prefix.to_owned() + name,
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contain
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);
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libraries.write_all(line.as_bytes()).unwrap();
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}
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}
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}
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}
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fn main() {
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let has_rustfmt = Command::new("rustfmt")
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.arg("--version")
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.stdin(Stdio::inherit())
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.status()
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.is_ok();
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if !has_rustfmt {
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println!("Failed to run rustfmt, will skip formatting generated files.")
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}
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let out_dir = env::var("OUT_DIR").unwrap();
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let dest_path = Path::new(&out_dir).join("libraries.rs");
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let mut libraries = File::create(&dest_path).unwrap();
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let lib_path = Path::new("src/lib");
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libraries
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.write_all(
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b"ref_thread_local::ref_thread_local! {
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pub(crate) static managed LIBRARIES: IndexMap<&'static str, &'static str> = {
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let mut m = IndexMap::new();\n",
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)
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.unwrap();
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find_prolog_files(&mut libraries, "", &lib_path);
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libraries.write_all(b"\n m\n };\n}\n").unwrap();
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let instructions_path = Path::new(&out_dir).join("instructions.rs");
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let mut instructions_file = File::create(&instructions_path).unwrap();
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let quoted_output = generate_instructions_rs();
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instructions_file
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.write_all(quoted_output.to_string().as_bytes())
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.unwrap();
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if has_rustfmt {
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format_generated_file(instructions_path.as_path());
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}
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let static_atoms_path = Path::new(&out_dir).join("static_atoms.rs");
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let mut static_atoms_file = File::create(&static_atoms_path).unwrap();
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let quoted_output = index_static_strings(&instructions_path);
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static_atoms_file
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.write_all(quoted_output.to_string().as_bytes())
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.unwrap();
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if has_rustfmt {
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format_generated_file(static_atoms_path.as_path());
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}
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println!("cargo:rerun-if-changed=src/");
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}
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fn format_generated_file(path: &Path) {
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Command::new("rustfmt")
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.arg(path.as_os_str())
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.spawn()
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.unwrap_or_else(|err| {
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eprintln!(
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"{}: rustfmt (https://github.com/rust-lang/rustfmt) \
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is required build time dependency and must be available \
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in the environment's PATH variable.",
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err
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);
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process::exit(1);
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})
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.wait()
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.unwrap();
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}
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