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Copy pathlicense.rs
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82 lines (70 loc) · 2.5 KB
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use std::{collections::BTreeMap, ffi::OsStr, fmt::Display, fs::read_to_string, path::Path};
use askalono::{ScanStrategy, Store, TextData};
use once_cell::sync::Lazy;
use spdx::{Expression, ParseMode};
use tracing::{debug, warn};
use crate::utils::ResultExt;
pub static LICENSE_STORE: Lazy<Option<Store>> = Lazy::new(|| {
Store::from_cache(include_bytes!("../data/license-store-cache.zstd") as &[_])
.ok_inspect(|e| warn!("{e}"))
});
include!("../data/get_nix_license.rs");
pub fn parse_spdx_expression(license: &str, source: &'static str) -> Vec<&'static str> {
Expression::parse_mode(license, ParseMode::LAX)
.ok_inspect(|e| warn!("{e}"))
.map_or_else(Vec::new, |expr| {
expr.requirements()
.filter_map(|req| {
let license = get_nix_license(req.req.license.id()?.name)?;
debug!("license from {source}: {license}");
Some(license)
})
.collect()
})
}
pub fn load_license(
licenses: &mut BTreeMap<&'static str, f32>,
relative_path: impl Display,
strategy: &ScanStrategy,
path: &Path,
) {
if let Some((license, score)) = find_license(strategy, path) {
debug!("license found in {relative_path}: {license}");
licenses
.entry(license)
.and_modify(|max_score| *max_score = max_score.max(score))
.or_insert(score);
}
}
fn find_license(strategy: &ScanStrategy, path: &Path) -> Option<(&'static str, f32)> {
let text = read_to_string(path).ok_inspect(|e| warn!("{e}"))?;
let res = strategy
.scan(&TextData::from(text))
.ok_inspect(|e| warn!("{e}"))?;
let name = res.license?.name;
if let Some(prefix) = name.strip_suffix("-only")
&& path
.file_name()
.and_then(OsStr::to_str)
.is_some_and(|name| name.contains("-or-later"))
&& let Some(license) = get_nix_license(&format!("{prefix}-or-later"))
{
Some((license, res.score))
} else {
Some((get_nix_license(name)?, res.score))
}
}
#[cfg(test)]
mod tests {
use super::parse_spdx_expression;
#[test]
fn basic() {
assert_eq!(parse_spdx_expression("MPL-2.0", ""), ["mpl20"]);
assert_eq!(parse_spdx_expression("GPL-3.0", ""), ["gpl3Only"]);
assert_eq!(parse_spdx_expression("unknown license", ""), [""; 0]);
assert_eq!(
parse_spdx_expression("MIT or Apache-2.0", ""),
["mit", "asl20"],
);
}
}