use std::path::{Path, PathBuf};
use once_cell::sync::Lazy;
use regex::Regex;
use rustc_hash::{FxHashMap, FxHashSet};
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_swift_file(path: &Path) -> bool {
base::file_ext(path) == ".swift"
}
static IMPORT_RE: Lazy<Regex> = Lazy::new(|| {
Regex::new(r"(?m)^\s*import\s+(?:class|struct|enum|protocol|func\s+)?(\w+)").unwrap()
});
static TYPE_DEF_RE: Lazy<Regex> = Lazy::new(|| {
Regex::new(r"(?m)^\s*(?:public|open|internal|private|fileprivate)?\s*(?:final\s+)?(?:class|struct|protocol|enum|actor)\s+([A-Z]\w*)").unwrap()
});
static FUNC_DEF_RE: Lazy<Regex> = Lazy::new(|| {
Regex::new(r"(?m)^\s*(?:public|open|internal|private|fileprivate|static|class)?\s*func\s+([a-zA-Z_]\w*)").unwrap()
});
static CONFORMANCE_RE: Lazy<Regex> =
Lazy::new(|| Regex::new(r"(?:class|struct|enum|actor)\s+\w+\s*:\s*([\w\s,]+)").unwrap());
static EXTENSION_RE: Lazy<Regex> =
Lazy::new(|| Regex::new(r"(?m)^\s*extension\s+([A-Z]\w*)").unwrap());
static TYPE_REF_RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"\b([A-Z]\w*)\b").unwrap());
fn extract_imports(content: &str) -> FxHashSet<String> {
IMPORT_RE
.captures_iter(content)
.map(|c| c[1].to_string())
.collect()
}
fn extract_type_defs(content: &str) -> FxHashSet<String> {
let mut defs: FxHashSet<String> = TYPE_DEF_RE
.captures_iter(content)
.map(|c| c[1].to_string())
.collect();
defs.extend(FUNC_DEF_RE.captures_iter(content).map(|c| c[1].to_string()));
defs
}
fn extract_conformances(content: &str) -> FxHashSet<String> {
let mut refs = FxHashSet::default();
for cap in CONFORMANCE_RE.captures_iter(content) {
for part in cap[1].split(',') {
let name = part.trim();
if !name.is_empty() && name.starts_with(|c: char| c.is_uppercase()) {
refs.insert(name.to_string());
}
}
}
refs
}
fn extract_extensions(content: &str) -> FxHashSet<String> {
EXTENSION_RE
.captures_iter(content)
.map(|c| c[1].to_string())
.collect()
}
pub struct SwiftEdgeBuilder;
impl EdgeBuilder for SwiftEdgeBuilder {
fn build(&self, fragments: &[Fragment], repo_root: Option<&Path>) -> EdgeDict {
let frags: Vec<&Fragment> = fragments
.iter()
.filter(|f| is_swift_file(Path::new(f.path())))
.collect();
if frags.is_empty() {
return FxHashMap::default();
}
let import_w = EDGE_WEIGHTS["swift_import"].forward;
let conform_w = EDGE_WEIGHTS["swift_conformance"].forward;
let ext_w = EDGE_WEIGHTS["swift_extension"].forward;
let type_w = EDGE_WEIGHTS["swift_type"].forward;
let reverse_factor = EDGE_WEIGHTS["swift_import"].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_type_defs(&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_type_defs(&f.content);
for imp in extract_imports(&f.content) {
base::link_by_name(&f.id, &imp, &idx, &mut edges, import_w, reverse_factor);
}
for conf in extract_conformances(&f.content) {
if let Some(targets) = name_to_defs.get(&conf.to_lowercase()) {
add_edges_from_ids(&mut edges, &f.id, targets, conform_w, reverse_factor);
}
}
for ext_name in extract_extensions(&f.content) {
if let Some(targets) = name_to_defs.get(&ext_name.to_lowercase()) {
add_edges_from_ids(&mut edges, &f.id, targets, ext_w, reverse_factor);
}
}
for cap in TYPE_REF_RE.captures_iter(&f.content) {
let name = &cap[1];
if self_defs.contains(name) {
continue;
}
if let Some(targets) = name_to_defs.get(&name.to_lowercase()) {
for t in targets {
if t != &f.id {
add_edge(&mut edges, &f.id, t, type_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 sw_changed: Vec<&PathBuf> = changed.iter().filter(|f| is_swift_file(f)).collect();
if sw_changed.is_empty() {
return vec![];
}
let mut refs = FxHashSet::default();
for f in &sw_changed {
if let Some(content) = base::read_file_cached(f, file_cache) {
refs.extend(extract_imports(&content));
}
}
discover_files_by_refs(&refs, changed, candidates, repo_root)
}
}