71 lines
2.1 KiB
Rust
71 lines
2.1 KiB
Rust
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use std::{
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env, fs, io,
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path::{Path, PathBuf},
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};
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fn main() {
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println!("cargo:rerun-if-changed=examples");
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let examples_root = PathBuf::from("examples");
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let out_dir = PathBuf::from(env::var("OUT_DIR").expect("OUT_DIR is not set"));
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let out_file = out_dir.join("embedded_examples.rs");
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let mut dirs = Vec::new();
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let mut files = Vec::new();
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if examples_root.is_dir() {
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collect_examples(&examples_root, &examples_root, &mut dirs, &mut files)
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.expect("failed to collect example templates");
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}
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dirs.sort();
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files.sort_by(|a, b| a.0.cmp(&b.0));
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let mut generated = String::new();
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generated.push_str(
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"struct EmbeddedFile {\n path: &'static str,\n contents: &'static [u8],\n}\n\n",
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);
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generated.push_str("static EMBEDDED_EXAMPLE_DIRS: &[&str] = &[\n");
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for dir in &dirs {
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generated.push_str(&format!(" {:?},\n", dir));
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}
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generated.push_str("];\n\n");
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generated.push_str("static EMBEDDED_EXAMPLE_FILES: &[EmbeddedFile] = &[\n");
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for (relative_path, absolute_path) in &files {
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generated.push_str(&format!(
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" EmbeddedFile {{ path: {:?}, contents: include_bytes!(r#\"{}\"#) }},\n",
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relative_path,
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absolute_path.display()
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));
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}
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generated.push_str("];\n");
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fs::write(out_file, generated).expect("failed to write embedded example list");
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}
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fn collect_examples(
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root: &Path,
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dir: &Path,
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dirs: &mut Vec<String>,
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files: &mut Vec<(String, PathBuf)>,
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) -> io::Result<()> {
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for entry in fs::read_dir(dir)? {
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let entry = entry?;
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let path = entry.path();
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let relative_path = path
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.strip_prefix(root)
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.expect("example path is outside examples root")
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.to_string_lossy()
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.replace('\\', "/");
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if path.is_dir() {
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dirs.push(relative_path);
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collect_examples(root, &path, dirs, files)?;
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} else if path.is_file() {
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files.push((relative_path, path.canonicalize()?));
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}
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}
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Ok(())
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}
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