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build.rs
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build.rs
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// Copyright (C) 2019-2024 Aleo Systems Inc.
// This file is part of the Leo library.
// The Leo library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// The Leo library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
use std::{
fs::File,
io::{BufRead, BufReader},
path::Path,
};
use walkdir::WalkDir;
// The following license text that should be present at the beginning of every source file.
const EXPECTED_LICENSE_TEXT: &str = include_str!(".resources/license_header");
// The following directories will be excluded from the license scan.
const DIRS_TO_SKIP: [&str; 9] =
[".cargo", ".circleci", ".git", ".github", ".resources", "docs", "examples", "target", "tests"];
fn compare_license_text(path: &Path, expected_lines: &[&str]) {
let file = File::open(path).unwrap();
let reader = BufReader::new(file);
for (i, (file_line, expected_line)) in reader.lines().zip(expected_lines).enumerate() {
let file_line =
file_line.unwrap_or_else(|_| panic!("Can't read line {} in file \"{}\"!", i + 1, path.display()));
assert_eq!(
&file_line,
expected_line,
"Line {} in file \"{}\" was expected to contain the license text \"{}\", but contains \"{}\" instead! \
Consult the expected license text in \".resources/license_header\"",
i + 1,
path.display(),
expected_line,
file_line
);
}
}
fn check_file_licenses<P: AsRef<Path>>(path: P) {
let path = path.as_ref();
let license_lines: Vec<_> = EXPECTED_LICENSE_TEXT.lines().collect();
let mut iter = WalkDir::new(path).into_iter();
while let Some(entry) = iter.next() {
let entry = entry.unwrap();
let entry_type = entry.file_type();
// Skip the specified directories.
if entry_type.is_dir() && DIRS_TO_SKIP.contains(&entry.file_name().to_str().unwrap_or("")) {
iter.skip_current_dir();
continue;
}
// Check all files with the ".rs" extension.
if entry_type.is_file() && entry.file_name().to_str().unwrap_or("").ends_with(".rs") {
compare_license_text(entry.path(), &license_lines);
}
}
// Watch the directories that contain Rust source files
println!("cargo:rerun-if-changed=compiler");
println!("cargo:rerun-if-changed=errors");
println!("cargo:rerun-if-changed=leo");
println!("cargo:rerun-if-changed=tests/test-framework");
println!("cargo:rerun-if-changed=utils");
// Watch the build script itself
println!("cargo:rerun-if-changed=build.rs");
// Watch the license header file
println!("cargo:rerun-if-changed=.resources/license_header");
// Watch the Cargo.toml file
println!("cargo:rerun-if-changed=Cargo.toml");
// Watch the Cargo.lock file
println!("cargo:rerun-if-changed=Cargo.lock");
}
// The build script; it currently only checks the licenses.
fn main() {
// Check licenses in the current folder.
check_file_licenses(".");
}