use std::path::{Path, PathBuf};
use once_cell::sync::Lazy;
use regex::Regex;
use rustc_hash::{FxHashMap, FxHashSet};
use crate::config::extensions::RUBY_EXTENSIONS;
use crate::config::weights::EDGE_WEIGHTS;
use crate::types::Fragment;
use super::super::EdgeDict;
use super::super::base::{self, EdgeBuilder, add_edge, add_edges_from_ids, discover_files_by_refs};
fn is_ruby_file(path: &Path) -> bool {
let ext = base::file_ext(path);
RUBY_EXTENSIONS.contains(ext.as_str())
}
static REQUIRE_RE: Lazy<Regex> =
Lazy::new(|| Regex::new(r#"(?m)^\s*(?:require|require_relative)\s+['"]([^'"]+)['"]"#).unwrap());
static DEF_RE: Lazy<Regex> = Lazy::new(|| {
Regex::new(r"(?m)^\s*(?:class|module|def)\s+([A-Za-z_]\w*(?:::[A-Za-z_]\w*)*)").unwrap()
});
static MIXIN_RE: Lazy<Regex> = Lazy::new(|| {
Regex::new(r"(?m)^\s*(?:include|extend|prepend)\s+([A-Z]\w*(?:::[A-Z]\w*)*)").unwrap()
});
static CONST_REF_RE: Lazy<Regex> =
Lazy::new(|| Regex::new(r"\b([A-Z][A-Za-z_]*(?:::[A-Z][A-Za-z_]*)*)\b").unwrap());
fn extract_requires(content: &str) -> FxHashSet<String> {
REQUIRE_RE
.captures_iter(content)
.map(|c| c[1].to_string())
.collect()
}
fn extract_defines(content: &str) -> FxHashSet<String> {
DEF_RE
.captures_iter(content)
.map(|c| {
let name = &c[1];
name.split("::").last().unwrap_or(name).to_string()
})
.collect()
}
fn extract_mixins(content: &str) -> FxHashSet<String> {
MIXIN_RE
.captures_iter(content)
.map(|c| {
let name = &c[1];
name.split("::").last().unwrap_or(name).to_string()
})
.collect()
}
fn extract_const_refs(content: &str) -> FxHashSet<String> {
CONST_REF_RE
.captures_iter(content)
.map(|c| c[1].to_string())
.collect()
}
pub struct RubyEdgeBuilder;
impl EdgeBuilder for RubyEdgeBuilder {
fn build(&self, fragments: &[Fragment], repo_root: Option<&Path>) -> EdgeDict {
let frags: Vec<&Fragment> = fragments
.iter()
.filter(|f| is_ruby_file(Path::new(f.path())))
.collect();
if frags.is_empty() {
return FxHashMap::default();
}
let require_w = EDGE_WEIGHTS["ruby_require"].forward;
let include_w = EDGE_WEIGHTS["ruby_include"].forward;
let const_w = EDGE_WEIGHTS["ruby_const"].forward;
let reverse_factor = EDGE_WEIGHTS["ruby_require"].reverse_factor;
let idx = base::FragmentIndex::new(fragments, repo_root);
let mut name_to_defs: FxHashMap<String, Vec<_>> = FxHashMap::default();
for f in &frags {
for name in extract_defines(&f.content) {
name_to_defs
.entry(name.to_lowercase())
.or_default()
.push(f.id.clone());
}
}
let mut edges: EdgeDict = FxHashMap::default();
for f in &frags {
let self_defs = extract_defines(&f.content);
for req in extract_requires(&f.content) {
base::link_by_name(&f.id, &req, &idx, &mut edges, require_w, reverse_factor);
}
for mixin in extract_mixins(&f.content) {
if let Some(targets) = name_to_defs.get(&mixin.to_lowercase()) {
add_edges_from_ids(&mut edges, &f.id, targets, include_w, reverse_factor);
}
}
for cref in extract_const_refs(&f.content) {
let leaf = cref.split("::").last().unwrap_or(&cref);
if self_defs.contains(leaf) {
continue;
}
if let Some(targets) = name_to_defs.get(&leaf.to_lowercase()) {
for t in targets {
if t != &f.id {
add_edge(&mut edges, &f.id, t, const_w, reverse_factor);
}
}
}
}
}
edges
}
fn discover_related_files(
&self,
changed: &[PathBuf],
candidates: &[PathBuf],
repo_root: Option<&Path>,
file_cache: Option<&FxHashMap<PathBuf, String>>,
) -> Vec<PathBuf> {
let rb_changed: Vec<&PathBuf> = changed.iter().filter(|f| is_ruby_file(f)).collect();
if rb_changed.is_empty() {
return vec![];
}
let mut refs = FxHashSet::default();
for f in &rb_changed {
if let Some(content) = base::read_file_cached(f, file_cache) {
refs.extend(extract_requires(&content));
}
}
discover_files_by_refs(&refs, changed, candidates, repo_root)
}
}