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Colby MchenryandClaude Opus 5.5
51be28d15b
PRs #693 and #1802 walk a declaration's initializer under the symbol it declares, so `const routes = { home }` references `home` from `routes`. The dispatcher's declaration-wide function-as-value scan then took the same values again for the enclosing file (or class). Flush-time dedup keys on the source, so both stayed: a second reference to the same function from the same spot. Each initializer walk now records what it walked, and the scan skips it. PR #2738 added that mechanism for component wrappers, and C#, Scala and Dart already had their own. The newly covered paths: - TS/JS module-level constants and variables, owned object literals included (#2300), and TS/JS class properties; - Python assignments, Go var/const specs, Rust const/static items; - Java fields, and Kotlin properties (walkInitializer takes the property's id, so their walk is unchanged). Mirrored in the kernel: tsjs, python, go, rustlang, java and kotlin. References no initializer walk takes are unchanged: a module-level call argument `register(fn)`, C-family tables, Rust's `static CB: fn() = handler` (the declaration's own value, which the scan still reads). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
1195 lines
46 KiB
Rust
1195 lines
46 KiB
Rust
//! Python extraction — a faithful Rust port of `TreeSitterExtractor`'s Python
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//! paths (src/extraction/tree-sitter.ts) plus languages/python.ts.
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//!
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//! Same porting contract as tsjs/java: behavior parity, bug-for-bug —
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//! including the quirks: decorates refs only fire for bare-identifier
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//! decorators (`@staticmethod` yes, `@app.route(...)` no — python's `call`
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//! kind isn't `call_expression`), module-level assignments always extract as
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//! `variable` (no isConst hook), and `self.method` fn-ref candidates carry the
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//! full receiver path (#1820).
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//! Python is not a TYPE_ANNOTATION language — no type
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//! refs anywhere. Files with parse errors defer to wasm.
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use crate::buffers::{
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build_meta, edge_kind_index, node_kind_index, Arena, BoolFlags, EdgeRow, EmitOut, NodeRow,
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RefRow, StrRef, Tables, FLAG_IS_ASYNC, FLAG_IS_STATIC, FUNCTION_REF_CODE, NONE, NONE_STR,
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};
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use crate::docstring::preceding_docstring;
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use crate::ids;
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use crate::textutil as util;
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use std::collections::{HashMap, HashSet};
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use tree_sitter::{Node, Parser};
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const MAX_VALUE_REF_NODES: usize = 20_000;
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// Keep body-docstring selection and cleaning in sync with languages/python.ts.
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fn body_docstring(node: Node, src: &str) -> Option<String> {
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let body = if node.kind() == "module" { node } else { node.child_by_field_name("body")? };
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let first = (0..body.named_child_count())
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.filter_map(|i| body.named_child(i))
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.find(|c| c.kind() != "comment")?;
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if first.kind() != "expression_statement" {
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return None;
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}
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if first.named_child_count() != 1 || (0..first.child_count())
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.filter_map(|i| first.child(i)).any(|c| c.kind() == ",") {
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return None;
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}
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let mut literal = first.named_child(0)?;
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while literal.kind() == "parenthesized_expression" {
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literal = (0..literal.named_child_count())
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.filter_map(|i| literal.named_child(i))
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.find(|c| c.kind() != "comment")?;
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}
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let strings = if literal.kind() == "concatenated_string" {
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(0..literal.named_child_count()).filter_map(|i| literal.named_child(i))
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.filter(|c| c.kind() != "comment").collect::<Vec<_>>()
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} else {
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vec![literal]
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};
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let mut raw = String::new();
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for string in strings {
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if string.kind() != "string" {
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return None;
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}
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let start = (0..string.named_child_count()).filter_map(|i| string.named_child(i))
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.find(|c| c.kind() == "string_start")?;
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if src[start.byte_range()].bytes().any(|b| matches!(b, b'b' | b'B' | b'f' | b'F')) {
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return None;
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}
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if !(0..string.named_child_count()).filter_map(|i| string.named_child(i))
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.any(|c| c.kind() == "string_end") {
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return None;
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}
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for i in 0..string.named_child_count() {
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if let Some(content) = string.named_child(i).filter(|c| c.kind() == "string_content") {
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raw.push_str(&src[content.byte_range()]);
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}
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}
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}
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let cleaned = dedent_docstring(&raw);
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if cleaned.is_empty() { None } else { Some(cleaned) }
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}
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fn docstring_space(c: char) -> bool {
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// Match JavaScript trim, including BOM but excluding NEXT LINE.
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(c.is_whitespace() && c != '\u{85}') || c == '\u{feff}'
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}
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fn dedent_docstring(raw: &str) -> String {
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let normalized = raw.replace("\r\n", "\n").replace('\r', "\n");
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let lines: Vec<String> = normalized.split('\n').map(|line| {
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let mut column = 0;
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let mut expanded = String::new();
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for c in line.chars() {
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let width = if c == '\t' { 8 - column % 8 } else { 1 };
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column += width;
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if c == '\t' { expanded.push_str(&" ".repeat(width)); } else { expanded.push(c); }
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}
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expanded
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}).collect();
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let indent = lines.iter().skip(1).filter(|l| !l.trim_matches(docstring_space).is_empty())
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.map(|l| l.chars().take_while(|c| docstring_space(*c)).count()).min().unwrap_or(0);
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let out: Vec<String> = lines.iter().enumerate().map(|(i, l)| {
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if i == 0 { l.trim_matches(docstring_space).to_string() } else {
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l.chars().skip(indent).collect::<String>().trim_end_matches(docstring_space).to_string()
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}
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}).collect();
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let start = out.iter().position(|l| !l.trim_matches(docstring_space).is_empty()).unwrap_or(out.len());
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let end = out.iter().rposition(|l| !l.trim_matches(docstring_space).is_empty()).map_or(start, |i| i + 1);
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out[start..end].join("\n")
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}
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fn docstring_for(node: Node, src: &str) -> Option<String> {
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let preceding = preceding_docstring(node, src);
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let body = body_docstring(node, src);
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match (preceding, body) {
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(Some(a), Some(b)) if !a.is_empty() => Some(format!("{a}\n\n{b}")),
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(a, b) => b.or(a),
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}
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}
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struct Scope {
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row: u32,
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kind: &'static str,
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name: String,
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}
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#[derive(Default)]
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struct Extra {
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docstring: Option<String>,
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signature: Option<String>,
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is_async: Option<bool>,
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is_static: Option<bool>,
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}
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struct ValueScope<'t> {
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row: u32,
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node: Node<'t>,
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name: String,
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}
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struct Cand {
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from: u32,
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name: String,
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line: u32,
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column_byte: usize,
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row: usize,
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}
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pub struct Walker<'t> {
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src: &'t str,
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file_path: &'t str,
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line_starts: Vec<usize>,
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arena: Arena,
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node_id_allocator: ids::NodeIdAllocator,
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tables: Tables,
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stack: Vec<Scope>,
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node_ids: Vec<String>,
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defined_fn_names: HashSet<String>,
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imported_names: HashSet<String>,
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fn_ref_cands: Vec<Cand>,
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fs_values: HashMap<String, u32>,
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fs_value_counts: HashMap<String, u32>,
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value_scopes: Vec<ValueScope<'t>>,
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}
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pub fn extract(file_path: &str, source: &str) -> Result<EmitOut, String> {
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let grammar = crate::langs::grammar_for("python").ok_or("no python grammar")?;
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let t0 = std::time::Instant::now();
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let mut parser = Parser::new();
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parser
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.set_language(&grammar)
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.map_err(|e| format!("set_language(python) failed: {e}"))?;
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let tree = parser
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.parse(source, None)
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.ok_or_else(|| "parser returned null tree".to_string())?;
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if tree.root_node().has_error() {
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return Err("defer: parse tree contains errors — wasm recovery is canonical".to_string());
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}
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let mut w = Walker {
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src: source,
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file_path,
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line_starts: util::line_starts(source),
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arena: Arena::default(),
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node_id_allocator: ids::NodeIdAllocator::default(),
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tables: Tables::default(),
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stack: Vec::new(),
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node_ids: Vec::new(),
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defined_fn_names: HashSet::new(),
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imported_names: HashSet::new(),
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fn_ref_cands: Vec::new(),
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fs_values: HashMap::new(),
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fs_value_counts: HashMap::new(),
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value_scopes: Vec::new(),
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};
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let line_count = source.bytes().filter(|b| *b == b'\n').count() as u32 + 1;
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let base_name = file_path.rsplit(['/', '\\']).next().unwrap_or(file_path);
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let mut flags = BoolFlags::default();
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flags.set(crate::buffers::FLAG_IS_EXPORTED, false);
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let file_id = w.arena.put(&ids::file_node_id(file_path));
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let name_ref = w.arena.put(base_name);
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let qn_ref = w.arena.put(file_path);
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let docstring = body_docstring(tree.root_node(), source)
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.map(|doc| w.arena.put(&doc)).unwrap_or(NONE_STR);
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w.tables.push_node(&NodeRow {
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kind: node_kind_index("file").unwrap(),
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visibility: 0,
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flags,
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start_line: 1,
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end_line: line_count,
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start_column: 0,
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end_column: 0,
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name: name_ref,
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qualified_name: qn_ref,
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id: file_id,
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docstring,
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signature: NONE_STR,
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decorators: NONE_STR,
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type_parameters: NONE_STR,
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return_type: NONE_STR,
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extra_json: NONE_STR,
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});
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w.node_ids.push(ids::file_node_id(file_path));
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w.stack.push(Scope { row: 0, kind: "file", name: base_name.to_string() });
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w.visit_node(tree.root_node());
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w.flush_fn_ref_candidates();
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w.flush_value_refs(tree.root_node());
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w.stack.pop();
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let duration_ms = t0.elapsed().as_secs_f64() * 1000.0;
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let meta = build_meta(&w.tables, w.arena.len(), NONE_STR, duration_ms);
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Ok(EmitOut {
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meta,
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nodes: w.tables.nodes,
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edges: w.tables.edges,
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refs: w.tables.refs,
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arena: w.arena.into_vec(),
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})
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}
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impl<'t> Walker<'t> {
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fn text(&self, node: Node) -> &'t str {
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&self.src[node.byte_range()]
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}
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fn line_of(&self, node: Node) -> u32 {
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node.start_position().row as u32 + 1
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}
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fn col_of(&self, node: Node) -> u32 {
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util::col16(self.src, &self.line_starts, node.start_position().row, node.start_byte())
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}
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fn end_col_of(&self, node: Node) -> u32 {
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util::col16(self.src, &self.line_starts, node.end_position().row, node.end_byte())
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}
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fn top_row(&self) -> u32 {
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self.stack.last().map(|s| s.row).unwrap_or(0)
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}
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fn inside_class_like(&self) -> bool {
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self.stack
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.last()
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.map(|s| matches!(s.kind, "class" | "struct" | "interface" | "trait" | "enum" | "module"))
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.unwrap_or(false)
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}
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fn push_ref_at(&mut self, from_row: u32, name: &str, kind_code: u8, node: Node) {
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let name_ref = self.arena.put(name);
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self.tables.push_ref(&RefRow {
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from_idx: from_row,
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kind: kind_code,
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line: self.line_of(node),
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column: self.col_of(node),
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reference_name: name_ref,
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candidates: NONE_STR,
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from_id_str: NONE_STR,
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});
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if kind_code == edge_kind_index("imports").unwrap() {
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if util::simple_name().is_match(name) {
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self.imported_names.insert(name.to_string());
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} else if let Some(c) = util::qualified_import().captures(name) {
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self.imported_names.insert(c[1].to_string());
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}
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}
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}
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fn create_node(&mut self, kind: &'static str, name: &str, node: Node<'t>, extra: Extra) -> Option<u32> {
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if name.is_empty() {
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return None;
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}
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let start_line = self.line_of(node);
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let column = self.col_of(node);
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let id = self.node_id_allocator.generate(self.file_path, kind, name, start_line, column);
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let end_line = node.end_position().row as u32 + 1;
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let qualified = {
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let mut parts: Vec<&str> = Vec::new();
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for s in &self.stack {
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if s.kind != "file" {
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parts.push(&s.name);
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}
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}
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let mut qn = parts.join("::");
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if !qn.is_empty() {
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qn.push_str("::");
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}
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qn.push_str(name);
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qn
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};
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let mut flags = BoolFlags::default();
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if let Some(v) = extra.is_async {
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flags.set(FLAG_IS_ASYNC, v);
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}
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if let Some(v) = extra.is_static {
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flags.set(FLAG_IS_STATIC, v);
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}
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let name_ref = self.arena.put(name);
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let qn_ref = self.arena.put(&qualified);
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let id_ref = self.arena.put(&id);
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let doc_ref = opt_str(&mut self.arena, extra.docstring.as_deref());
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let sig_ref = opt_str(&mut self.arena, extra.signature.as_deref());
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let row = self.tables.push_node(&NodeRow {
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kind: node_kind_index(kind).unwrap(),
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visibility: 0,
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flags,
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start_line,
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end_line,
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start_column: self.col_of(node),
|
||
end_column: self.end_col_of(node),
|
||
name: name_ref,
|
||
qualified_name: qn_ref,
|
||
id: id_ref,
|
||
docstring: doc_ref,
|
||
signature: sig_ref,
|
||
decorators: NONE_STR,
|
||
type_parameters: NONE_STR,
|
||
return_type: NONE_STR,
|
||
extra_json: NONE_STR,
|
||
});
|
||
self.node_ids.push(id);
|
||
|
||
let parent_row = self.top_row();
|
||
self.tables.push_edge(&EdgeRow {
|
||
source_idx: parent_row,
|
||
target_idx: row,
|
||
kind: edge_kind_index("contains").unwrap(),
|
||
provenance: 0,
|
||
line: NONE,
|
||
column: NONE,
|
||
metadata_json: NONE_STR,
|
||
source_id_str: NONE_STR,
|
||
target_id_str: NONE_STR,
|
||
});
|
||
|
||
// Classes join the fn-ref gate for Python (#1478): class-as-value is
|
||
// a first-class idiom (mirrors flushFnRefCandidates' python branch).
|
||
if kind == "function" || kind == "method" || kind == "class" {
|
||
self.defined_fn_names.insert(name.to_string());
|
||
}
|
||
// captureValueRefScope
|
||
let target_kind_ok = kind == "constant" || kind == "variable";
|
||
if target_kind_ok
|
||
&& util::utf16_len(name) >= 3
|
||
&& util::has_upper_or_underscore().is_match(name)
|
||
{
|
||
let parent_ok = self
|
||
.stack
|
||
.last()
|
||
.map(|s| matches!(s.kind, "file" | "class" | "module" | "struct" | "enum"))
|
||
.unwrap_or(false);
|
||
if parent_ok {
|
||
self.fs_values.insert(name.to_string(), row);
|
||
*self.fs_value_counts.entry(name.to_string()).or_insert(0) += 1;
|
||
}
|
||
}
|
||
if matches!(kind, "function" | "method" | "constant" | "variable") {
|
||
self.value_scopes.push(ValueScope { row, node, name: name.to_string() });
|
||
}
|
||
Some(row)
|
||
}
|
||
|
||
fn extract_name(&self, node: Node) -> String {
|
||
if let Some(name_node) = node.child_by_field_name("name") {
|
||
return self.text(name_node).to_string();
|
||
}
|
||
for i in 0..node.named_child_count() {
|
||
if let Some(c) = node.named_child(i) {
|
||
if matches!(c.kind(), "identifier" | "type_identifier" | "simple_identifier" | "constant") {
|
||
return self.text(c).to_string();
|
||
}
|
||
}
|
||
}
|
||
"<anonymous>".to_string()
|
||
}
|
||
|
||
/// pythonExtractor.getSignature: params + ` -> returnType`.
|
||
fn signature_of(&self, node: Node) -> Option<String> {
|
||
let params = node.child_by_field_name("parameters")?;
|
||
let mut sig = self.text(params).to_string();
|
||
if let Some(ret) = node.child_by_field_name("return_type") {
|
||
sig.push_str(" -> ");
|
||
sig.push_str(self.text(ret));
|
||
}
|
||
Some(sig)
|
||
}
|
||
|
||
/// pythonExtractor.isAsync: the PREVIOUS SIBLING token is `async`.
|
||
fn is_async(&self, node: Node) -> bool {
|
||
node.prev_sibling().map(|p| p.kind() == "async").unwrap_or(false)
|
||
}
|
||
|
||
/// pythonExtractor.isStatic: preceding decorator mentioning `staticmethod`.
|
||
fn is_static(&self, node: Node) -> bool {
|
||
if let Some(prev) = node.prev_named_sibling() {
|
||
if prev.kind() == "decorator" {
|
||
return self.text(prev).contains("staticmethod");
|
||
}
|
||
}
|
||
false
|
||
}
|
||
|
||
// --- visitNode ------------------------------------------------------------
|
||
|
||
fn visit_node(&mut self, node: Node<'t>) {
|
||
stack_guard!();
|
||
let kind = node.kind();
|
||
let mut skip_children = false;
|
||
|
||
self.maybe_capture_fn_refs(node);
|
||
|
||
if kind == "function_definition" {
|
||
// functionTypes ∩ methodTypes: inside a class-like ⇒ method.
|
||
if self.inside_class_like() {
|
||
self.extract_method(node);
|
||
} else {
|
||
self.extract_function(node);
|
||
}
|
||
skip_children = true;
|
||
} else if kind == "class_definition" {
|
||
self.extract_class(node);
|
||
skip_children = true;
|
||
} else if kind == "assignment" && !self.inside_class_like() {
|
||
// The right-hand side extract_variable walked under the assigned
|
||
// name took its own candidates; the scan covers the rest.
|
||
let walked = self.extract_variable(node);
|
||
self.scan_fn_ref_subtree(node, 0, &walked);
|
||
skip_children = true;
|
||
} else if kind == "import_statement" || kind == "import_from_statement" {
|
||
self.extract_import(node);
|
||
} else if kind == "call" {
|
||
self.extract_call(node);
|
||
}
|
||
|
||
if !skip_children {
|
||
for i in 0..node.named_child_count() {
|
||
if let Some(c) = node.named_child(i) {
|
||
self.visit_node(c);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
fn visit_function_body(&mut self, body: Node<'t>) {
|
||
stack_guard!();
|
||
self.visit_for_calls_and_structure(body);
|
||
}
|
||
|
||
fn visit_for_calls_and_structure(&mut self, node: Node<'t>) {
|
||
stack_guard!();
|
||
let kind = node.kind();
|
||
self.maybe_capture_fn_refs(node);
|
||
|
||
if kind == "call" {
|
||
self.extract_call(node);
|
||
}
|
||
|
||
// Nested NAMED functions become their own nodes.
|
||
if kind == "function_definition" {
|
||
let name = self.extract_name(node);
|
||
if name != "<anonymous>" {
|
||
self.extract_function(node);
|
||
return;
|
||
}
|
||
}
|
||
if kind == "class_definition" {
|
||
self.extract_class(node);
|
||
return;
|
||
}
|
||
|
||
for i in 0..node.named_child_count() {
|
||
if let Some(c) = node.named_child(i) {
|
||
self.visit_for_calls_and_structure(c);
|
||
}
|
||
}
|
||
}
|
||
|
||
// --- extractors --------------------------------------------------------------
|
||
|
||
fn extract_function(&mut self, node: Node<'t>) {
|
||
stack_guard!();
|
||
let name = self.extract_name(node);
|
||
if name == "<anonymous>" {
|
||
if let Some(body) = node.child_by_field_name("body") {
|
||
self.visit_function_body(body);
|
||
}
|
||
return;
|
||
}
|
||
let extra = Extra {
|
||
docstring: docstring_for(node, self.src),
|
||
signature: self.signature_of(node),
|
||
is_async: Some(self.is_async(node)),
|
||
is_static: Some(self.is_static(node)),
|
||
};
|
||
let Some(row) = self.create_node("function", &name, node, extra) else { return };
|
||
// (python is not a TYPE_ANNOTATION language — no type refs)
|
||
self.extract_decorators_for(node, row);
|
||
self.stack.push(Scope { row, kind: "function", name });
|
||
if let Some(body) = node.child_by_field_name("body") {
|
||
self.visit_function_body(body);
|
||
}
|
||
self.stack.pop();
|
||
}
|
||
|
||
fn extract_method(&mut self, node: Node<'t>) {
|
||
stack_guard!();
|
||
let name = self.extract_name(node);
|
||
let extra = Extra {
|
||
docstring: docstring_for(node, self.src),
|
||
signature: self.signature_of(node),
|
||
is_async: Some(self.is_async(node)),
|
||
is_static: Some(self.is_static(node)),
|
||
};
|
||
let Some(row) = self.create_node("method", &name, node, extra) else { return };
|
||
self.extract_decorators_for(node, row);
|
||
self.stack.push(Scope { row, kind: "method", name });
|
||
if let Some(body) = node.child_by_field_name("body") {
|
||
self.visit_function_body(body);
|
||
}
|
||
self.stack.pop();
|
||
}
|
||
|
||
fn extract_class(&mut self, node: Node<'t>) {
|
||
stack_guard!();
|
||
let name = self.extract_name(node);
|
||
let extra = Extra {
|
||
docstring: docstring_for(node, self.src),
|
||
..Extra::default()
|
||
};
|
||
let Some(row) = self.create_node("class", &name, node, extra) else { return };
|
||
|
||
// Inheritance: `class Flask(Scaffold, Mixin):` — argument_list children.
|
||
let extends_kind = edge_kind_index("extends").unwrap();
|
||
for i in 0..node.named_child_count() {
|
||
let Some(child) = node.named_child(i) else { continue };
|
||
if child.kind() == "argument_list" {
|
||
for j in 0..child.named_child_count() {
|
||
let Some(arg) = child.named_child(j) else { continue };
|
||
if matches!(arg.kind(), "identifier" | "attribute") {
|
||
let name = self.text(arg).to_string();
|
||
self.push_ref_at(row, &name, extends_kind, arg);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
self.extract_decorators_for(node, row);
|
||
|
||
self.stack.push(Scope { row, kind: "class", name });
|
||
let body = node.child_by_field_name("body").unwrap_or(node);
|
||
for i in 0..body.named_child_count() {
|
||
if let Some(c) = body.named_child(i) {
|
||
self.visit_node(c);
|
||
}
|
||
}
|
||
self.stack.pop();
|
||
}
|
||
|
||
/// extractVariable's python branch: `left = right` at module scope.
|
||
/// Returns the right-hand side when it was walked under the assigned
|
||
/// name, for the declaration scan to skip.
|
||
fn extract_variable(&mut self, node: Node<'t>) -> Vec<usize> {
|
||
let docstring = preceding_docstring(node, self.src);
|
||
let left = node.child_by_field_name("left").or_else(|| node.named_child(0));
|
||
let right = node.child_by_field_name("right").or_else(|| node.named_child(1));
|
||
let mut assigned: Option<(u32, String)> = None;
|
||
if let Some(left) = left {
|
||
if matches!(left.kind(), "identifier" | "constant") {
|
||
let name = self.text(left).to_string();
|
||
let signature = right.map(|r| util::init_signature(self.text(r)));
|
||
// No isConst hook ⇒ always `variable` (UPPER_CASE constants included).
|
||
let row = self.create_node(
|
||
"variable",
|
||
&name,
|
||
node,
|
||
Extra { docstring, signature, ..Extra::default() },
|
||
);
|
||
if let Some(row) = row {
|
||
assigned = Some((row, name));
|
||
}
|
||
}
|
||
}
|
||
// Walk the initializer ATTRIBUTED to the assigned name (#693): a
|
||
// module-level `app = FastAPI()` / `handler = lambda: run()` dropped
|
||
// every call on the right-hand side. A tuple target mints no symbol, so
|
||
// its RHS is walked at the enclosing scope rather than lost.
|
||
let mut walked = Vec::new();
|
||
if let Some(right) = right {
|
||
match assigned {
|
||
Some((row, name)) => {
|
||
self.stack.push(Scope { row, kind: "variable", name });
|
||
self.visit_function_body(right);
|
||
self.stack.pop();
|
||
walked.push(right.id());
|
||
}
|
||
None => self.visit_function_body(right),
|
||
}
|
||
}
|
||
walked
|
||
}
|
||
|
||
fn extract_import(&mut self, node: Node<'t>) {
|
||
let import_text = self.text(node).trim().to_string();
|
||
let imports_kind = edge_kind_index("imports").unwrap();
|
||
|
||
if node.kind() == "import_from_statement" {
|
||
// Hook path: module_name field → import node + module ref, then
|
||
// per-name binding refs (emitPyFromImportRefs).
|
||
let Some(module_node) = node.child_by_field_name("module_name") else { return };
|
||
let module_name = self.text(module_node).to_string();
|
||
if module_name.is_empty() {
|
||
return;
|
||
}
|
||
self.create_node(
|
||
"import",
|
||
&module_name,
|
||
node,
|
||
Extra { signature: Some(import_text), ..Extra::default() },
|
||
);
|
||
let parent = self.top_row();
|
||
self.push_ref_at(parent, &module_name.clone(), imports_kind, node);
|
||
|
||
// emitPyFromImportRefs: one `imports` ref per imported name.
|
||
for i in 0..node.named_child_count() {
|
||
let Some(child) = node.named_child(i) else { continue };
|
||
if child.start_byte() == module_node.start_byte()
|
||
&& child.end_byte() == module_node.end_byte()
|
||
{
|
||
continue;
|
||
}
|
||
if child.kind() == "wildcard_import" {
|
||
continue;
|
||
}
|
||
let name_node = match child.kind() {
|
||
"aliased_import" => child
|
||
.child_by_field_name("alias")
|
||
.or_else(|| child.child_by_field_name("name"))
|
||
.or_else(|| child.named_child(0)),
|
||
"dotted_name" => Some(child),
|
||
_ => None,
|
||
};
|
||
let Some(name_node) = name_node else { continue };
|
||
let raw = self.text(name_node);
|
||
let local = raw.rsplit('.').next().unwrap_or("");
|
||
if local.is_empty() {
|
||
continue;
|
||
}
|
||
self.push_ref_at(parent, &local.to_string(), imports_kind, name_node);
|
||
}
|
||
return;
|
||
}
|
||
|
||
// import_statement: `import a.b, x as y` — one import node + module ref
|
||
// per dotted name (the python multi-import branch).
|
||
let parent = self.top_row();
|
||
for i in 0..node.named_child_count() {
|
||
let Some(child) = node.named_child(i) else { continue };
|
||
if child.kind() == "dotted_name" {
|
||
let name = self.text(child).to_string();
|
||
self.create_node(
|
||
"import",
|
||
&name,
|
||
node,
|
||
Extra { signature: Some(import_text.clone()), ..Extra::default() },
|
||
);
|
||
self.push_ref_at(parent, &name, imports_kind, child);
|
||
} else if child.kind() == "aliased_import" {
|
||
let dotted = (0..child.named_child_count())
|
||
.filter_map(|j| child.named_child(j))
|
||
.find(|c| c.kind() == "dotted_name");
|
||
if let Some(dotted) = dotted {
|
||
let name = self.text(dotted).to_string();
|
||
self.create_node(
|
||
"import",
|
||
&name,
|
||
node,
|
||
Extra { signature: Some(import_text.clone()), ..Extra::default() },
|
||
);
|
||
self.push_ref_at(parent, &name, imports_kind, dotted);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// extractCall — python `call` through the generic tail (attribute callees).
|
||
fn extract_call(&mut self, node: Node<'t>) {
|
||
if self.stack.is_empty() {
|
||
return;
|
||
}
|
||
let func = node
|
||
.child_by_field_name("function")
|
||
.or_else(|| node.named_child(0));
|
||
let mut callee_name = String::new();
|
||
|
||
if let Some(func) = func {
|
||
if func.kind() == "attribute" {
|
||
// `property` and `field` fields don't exist on attribute —
|
||
// the generic path falls back to namedChild(1) (the attr name).
|
||
let property = func
|
||
.child_by_field_name("property")
|
||
.or_else(|| func.child_by_field_name("field"))
|
||
.or_else(|| func.named_child(1));
|
||
if let Some(property) = property {
|
||
let method_name = self.text(property);
|
||
let receiver = func
|
||
.child_by_field_name("object")
|
||
.or_else(|| func.child_by_field_name("operand"))
|
||
.or_else(|| func.child_by_field_name("argument"))
|
||
.or_else(|| func.named_child(0));
|
||
if let Some(r) = receiver {
|
||
if is_literal_receiver(r.kind()) {
|
||
return;
|
||
}
|
||
}
|
||
let recv_ident = receiver.filter(|r| {
|
||
matches!(r.kind(), "identifier" | "simple_identifier" | "field_identifier")
|
||
});
|
||
if let Some(r) = recv_ident {
|
||
let receiver_name = self.text(r);
|
||
if !matches!(receiver_name, "self" | "this" | "cls" | "super") {
|
||
callee_name = format!("{receiver_name}.{method_name}");
|
||
} else {
|
||
callee_name = method_name.to_string();
|
||
}
|
||
} else if let Some(r) = receiver.filter(|r| r.kind() == "call") {
|
||
// Call receiver — `d.setdefault(k, []).append(v)` (#1683):
|
||
// `<inner>().<method>`, or nothing when the inner callee
|
||
// is not a plain name / attribute chain. Mirrors
|
||
// TreeSitterExtractor.extractCall.
|
||
let Some(inner) = self.plain_inner_callee(r) else { return };
|
||
callee_name = format!("{inner}().{method_name}");
|
||
} else if let Some(r) = receiver {
|
||
// Any receiver shape the arms above do not claim — attribute
|
||
// chain (`self.data.append`) and subscript (`d[k].append`).
|
||
// The call-chain shape (`rows.setdefault(k, []).append(x)`)
|
||
// is taken by the `<inner>().<method>` arm above (#1748),
|
||
// which is matched first.
|
||
// These used to fall through to a BARE method_name. A bare name
|
||
// matching a common list/dict/str method (`append`, `get`,
|
||
// `update`, ...) exact-matches an unrelated top-level project
|
||
// function sharing that name, fabricating a call edge (#66,
|
||
// same class as #1230/#1276). Keep the receiver's source text
|
||
// as a qualifier so the ref can only resolve through
|
||
// import/module-member resolution, never the bare-name
|
||
// fallback; an unresolvable qualifier is a silent miss, never
|
||
// a wrong edge. Mirrors TreeSitterExtractor.extractCall's
|
||
// python branch — the whitespace collapse is JS `\s`
|
||
// semantics, not `char::is_whitespace`, so both arms emit the
|
||
// same bytes for the parity sweep.
|
||
let receiver_text = collapse_js_whitespace(self.text(r));
|
||
callee_name = if receiver_text.is_empty() {
|
||
method_name.to_string()
|
||
} else {
|
||
format!("{receiver_text}.{method_name}")
|
||
};
|
||
} else {
|
||
callee_name = method_name.to_string();
|
||
}
|
||
}
|
||
} else {
|
||
callee_name = self.text(func).to_string();
|
||
}
|
||
}
|
||
|
||
if !callee_name.is_empty() {
|
||
if let Some(c) = util::paren_conversion().captures(&callee_name) {
|
||
callee_name = c[1].to_string();
|
||
}
|
||
let from = self.top_row();
|
||
self.push_ref_at(from, &callee_name.clone(), edge_kind_index("calls").unwrap(), node);
|
||
}
|
||
}
|
||
|
||
/// The callee of a call receiver when it is a plain identifier or attribute
|
||
/// chain (`make`, `d.setdefault`), whitespace stripped (#1683).
|
||
fn plain_inner_callee(&self, call: Node<'t>) -> Option<String> {
|
||
let inner = call.child_by_field_name("function")?;
|
||
let text: String = self.text(inner).chars().filter(|c| !c.is_whitespace()).collect();
|
||
if text.is_empty() {
|
||
return None;
|
||
}
|
||
let ok = text.split('.').all(|seg| {
|
||
let mut chars = seg.chars();
|
||
matches!(chars.next(), Some(c) if c.is_ascii_alphabetic() || c == '_')
|
||
&& chars.all(|c| c.is_ascii_alphanumeric() || c == '_')
|
||
});
|
||
if ok { Some(text) } else { None }
|
||
}
|
||
|
||
/// extractDecoratorsFor — python decorators are PRECEDING SIBLINGS inside
|
||
/// decorated_definition. Only bare-identifier decorators yield a target
|
||
/// (python's `call` kind isn't `call_expression`, and `attribute` isn't in
|
||
/// the target-kind list — mirrored exactly).
|
||
fn extract_decorators_for(&mut self, decl: Node<'t>, decorated_row: u32) {
|
||
for i in 0..decl.named_child_count() {
|
||
if let Some(child) = decl.named_child(i) {
|
||
self.consider_decorator(child, decorated_row);
|
||
}
|
||
}
|
||
let Some(parent) = decl.parent() else { return };
|
||
let decl_start = decl.start_byte();
|
||
let mut decl_idx: isize = -1;
|
||
for i in 0..parent.named_child_count() {
|
||
if let Some(sib) = parent.named_child(i) {
|
||
if sib.start_byte() == decl_start {
|
||
decl_idx = i as isize;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if decl_idx > 0 {
|
||
let mut j = decl_idx - 1;
|
||
while j >= 0 {
|
||
let Some(sib) = parent.named_child(j as usize) else {
|
||
j -= 1;
|
||
continue;
|
||
};
|
||
if !matches!(sib.kind(), "decorator" | "annotation" | "marker_annotation") {
|
||
break;
|
||
}
|
||
self.consider_decorator(sib, decorated_row);
|
||
j -= 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
fn consider_decorator(&mut self, n: Node<'t>, decorated_row: u32) {
|
||
if !matches!(n.kind(), "decorator" | "annotation" | "marker_annotation" | "attribute") {
|
||
return;
|
||
}
|
||
let mut target: Option<Node> = None;
|
||
for i in 0..n.named_child_count() {
|
||
let Some(child) = n.named_child(i) else { continue };
|
||
if child.kind() == "call_expression" {
|
||
target = child.child_by_field_name("function").or_else(|| child.named_child(0));
|
||
if target.is_some() {
|
||
break;
|
||
}
|
||
}
|
||
if matches!(
|
||
child.kind(),
|
||
"identifier" | "member_expression" | "scoped_identifier" | "navigation_expression"
|
||
| "user_type" | "type_identifier"
|
||
) {
|
||
target = Some(child);
|
||
break;
|
||
}
|
||
}
|
||
let Some(target) = target else { return };
|
||
let mut name = self.text(target).to_string();
|
||
if let Some(lt) = name.find('<') {
|
||
if lt > 0 {
|
||
name.truncate(lt);
|
||
}
|
||
}
|
||
let last_dot = name
|
||
.rfind('.')
|
||
.map(|i| i as isize)
|
||
.unwrap_or(-1)
|
||
.max(name.rfind("::").map(|i| i as isize).unwrap_or(-1));
|
||
if last_dot >= 0 {
|
||
name = name[(last_dot as usize + 1)..].to_string();
|
||
if name.starts_with(':') || name.starts_with('.') {
|
||
name.remove(0);
|
||
}
|
||
}
|
||
let name = name.trim().to_string();
|
||
if name.is_empty() {
|
||
return;
|
||
}
|
||
self.push_ref_at(decorated_row, &name, edge_kind_index("decorates").unwrap(), n);
|
||
}
|
||
|
||
// --- fn refs (PYTHON_SPEC) ------------------------------------------------------
|
||
|
||
fn maybe_capture_fn_refs(&mut self, node: Node<'t>) {
|
||
let (mode, field): (&str, &str) = match node.kind() {
|
||
"argument_list" => ("args", ""),
|
||
"assignment" => ("rhs", "right"),
|
||
"keyword_argument" => ("value", "value"),
|
||
"pair" => ("value", "value"),
|
||
"list" => ("list", ""),
|
||
// `return SomeClass` / `return handler` (#1478) — a single
|
||
// returned expression is a direct named child ('list' shape);
|
||
// tuple returns sit under expression_list and are not descended
|
||
// (mirrors PYTHON_SPEC).
|
||
"return_statement" => ("list", ""),
|
||
_ => return,
|
||
};
|
||
if self.stack.is_empty() {
|
||
return;
|
||
}
|
||
let from = self.top_row();
|
||
|
||
let mut values: Vec<Node> = Vec::new();
|
||
match mode {
|
||
"args" | "list" => {
|
||
for i in 0..node.named_child_count() {
|
||
if let Some(c) = node.named_child(i) {
|
||
values.push(c);
|
||
}
|
||
}
|
||
}
|
||
"rhs" => {
|
||
if let Some(rhs) = node.child_by_field_name(field) {
|
||
let lhs_text = node
|
||
.child_by_field_name("left")
|
||
.map(|l| self.text(l))
|
||
.unwrap_or("");
|
||
let lhs_last = util::lhs_last_name()
|
||
.captures(lhs_text)
|
||
.and_then(|c| c.get(1))
|
||
.map(|m| m.as_str());
|
||
if !(lhs_last.is_some() && lhs_last == Some(self.text(rhs).trim())) {
|
||
values.push(rhs);
|
||
}
|
||
}
|
||
}
|
||
_ => {
|
||
if let Some(v) = node.child_by_field_name(field) {
|
||
values.push(v);
|
||
}
|
||
}
|
||
}
|
||
|
||
for v in values {
|
||
let (name, anchor) = match v.kind() {
|
||
"identifier" => (self.text(v).to_string(), v),
|
||
// Preserve only statically named member chains, as on WASM.
|
||
"attribute" => {
|
||
let Some(attr) = v.child_by_field_name("attribute") else { continue };
|
||
let name = self.text(v);
|
||
if !name.split('.').all(|part| {
|
||
!part.is_empty() && part.chars().enumerate().all(|(i, c)| {
|
||
c == '_' || c.is_ascii_alphabetic() || (i > 0 && c.is_ascii_digit())
|
||
})
|
||
}) { continue; }
|
||
(name.to_string(), attr)
|
||
}
|
||
_ => continue,
|
||
};
|
||
if name.is_empty() || is_stoplisted(&name) {
|
||
continue;
|
||
}
|
||
let p = anchor.start_position();
|
||
self.fn_ref_cands.push(Cand {
|
||
from,
|
||
name,
|
||
line: p.row as u32 + 1,
|
||
column_byte: anchor.start_byte(),
|
||
row: p.row,
|
||
});
|
||
}
|
||
}
|
||
|
||
fn scan_fn_ref_subtree(&mut self, node: Node<'t>, depth: u32, walked: &[usize]) {
|
||
stack_guard!();
|
||
if depth > 12 {
|
||
return;
|
||
}
|
||
// Subtrees the body walker has already been through.
|
||
if walked.contains(&node.id()) {
|
||
return;
|
||
}
|
||
// Halts at functionTypes ∪ the fixed arrow/lambda list — python's
|
||
// `lambda` kind is NOT in that list (mirrored).
|
||
if depth > 0
|
||
&& matches!(
|
||
node.kind(),
|
||
"function_definition" | "arrow_function" | "function_expression" | "lambda_literal"
|
||
| "lambda_expression"
|
||
)
|
||
{
|
||
return;
|
||
}
|
||
self.maybe_capture_fn_refs(node);
|
||
for i in 0..node.named_child_count() {
|
||
if let Some(c) = node.named_child(i) {
|
||
self.scan_fn_ref_subtree(c, depth + 1, walked);
|
||
}
|
||
}
|
||
}
|
||
|
||
fn flush_fn_ref_candidates(&mut self) {
|
||
let cands = std::mem::take(&mut self.fn_ref_cands);
|
||
if cands.is_empty() || util::is_generated_file(self.file_path) {
|
||
return;
|
||
}
|
||
let mut seen: HashSet<(String, String)> = HashSet::new();
|
||
for c in cands {
|
||
if !c.name.starts_with("this.")
|
||
&& !c.name.contains('.')
|
||
&& !c.name.contains("::")
|
||
&& !self.defined_fn_names.contains(&c.name)
|
||
&& !self.imported_names.contains(&c.name)
|
||
{
|
||
continue;
|
||
}
|
||
if !seen.insert((self.node_ids[c.from as usize].clone(), c.name.clone())) {
|
||
continue;
|
||
}
|
||
let column = util::col16(self.src, &self.line_starts, c.row, c.column_byte);
|
||
let name_ref = self.arena.put(&c.name);
|
||
self.tables.push_ref(&RefRow {
|
||
from_idx: c.from,
|
||
kind: FUNCTION_REF_CODE,
|
||
line: c.line,
|
||
column,
|
||
reference_name: name_ref,
|
||
candidates: NONE_STR,
|
||
from_id_str: NONE_STR,
|
||
});
|
||
}
|
||
}
|
||
|
||
// --- value refs -------------------------------------------------------------------
|
||
|
||
fn flush_value_refs(&mut self, root: Node<'t>) {
|
||
let scopes = std::mem::take(&mut self.value_scopes);
|
||
let mut targets = std::mem::take(&mut self.fs_values);
|
||
let counts = std::mem::take(&mut self.fs_value_counts);
|
||
if std::env::var("CODEGRAPH_VALUE_REFS").as_deref() == Ok("0") {
|
||
return;
|
||
}
|
||
if targets.is_empty() || scopes.is_empty() || util::is_generated_file(self.file_path) {
|
||
return;
|
||
}
|
||
|
||
// Shadow prune — python's declarator shape is `assignment`.
|
||
let mut decl_counts: HashMap<&str, u32> = HashMap::new();
|
||
let mut dstack: Vec<Node> = vec![root];
|
||
let mut dvisited = 0usize;
|
||
while let Some(n) = dstack.pop() {
|
||
if dvisited >= MAX_VALUE_REF_NODES {
|
||
break;
|
||
}
|
||
dvisited += 1;
|
||
if n.kind() == "assignment" {
|
||
let left = n
|
||
.child_by_field_name("left")
|
||
.or_else(|| n.child_by_field_name("pattern"))
|
||
.or_else(|| n.named_child(0));
|
||
if let Some(left) = left {
|
||
if left.kind() == "identifier" {
|
||
let nm = self.text(left);
|
||
if targets.contains_key(nm) {
|
||
*decl_counts.entry(nm).or_insert(0) += 1;
|
||
}
|
||
} else {
|
||
for i in 0..left.named_child_count() {
|
||
if let Some(c) = left.named_child(i) {
|
||
if c.kind() == "identifier" {
|
||
let nm = self.text(c);
|
||
if targets.contains_key(nm) {
|
||
*decl_counts.entry(nm).or_insert(0) += 1;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
for i in 0..n.named_child_count() {
|
||
if let Some(c) = n.named_child(i) {
|
||
dstack.push(c);
|
||
}
|
||
}
|
||
}
|
||
let shadowed: Vec<String> = decl_counts
|
||
.iter()
|
||
.filter(|(nm, c)| **c > counts.get(**nm).copied().unwrap_or(1))
|
||
.map(|(nm, _)| nm.to_string())
|
||
.collect();
|
||
for nm in shadowed {
|
||
targets.remove(&nm);
|
||
}
|
||
if targets.is_empty() {
|
||
return;
|
||
}
|
||
|
||
let refs_kind = edge_kind_index("references").unwrap();
|
||
for scope in &scopes {
|
||
let mut seen: HashSet<&str> = HashSet::new();
|
||
let mut stack: Vec<Node> = vec![scope.node];
|
||
let mut visited = 0usize;
|
||
while let Some(n) = stack.pop() {
|
||
if visited >= MAX_VALUE_REF_NODES {
|
||
break;
|
||
}
|
||
visited += 1;
|
||
if matches!(n.kind(), "identifier" | "constant" | "name" | "simple_identifier") {
|
||
let ref_name = self.text(n);
|
||
if let Some(&target_row) = targets.get(ref_name) {
|
||
let target_id = self.node_ids[target_row as usize].as_str();
|
||
if target_id != self.node_ids[scope.row as usize]
|
||
&& ref_name != scope.name
|
||
&& !seen.contains(&target_id)
|
||
{
|
||
seen.insert(target_id);
|
||
let meta = self.arena.put(r#"{"valueRef":true}"#);
|
||
self.tables.push_edge(&EdgeRow {
|
||
source_idx: scope.row,
|
||
target_idx: target_row,
|
||
kind: refs_kind,
|
||
provenance: 0,
|
||
line: NONE,
|
||
column: NONE,
|
||
metadata_json: meta,
|
||
source_id_str: NONE_STR,
|
||
target_id_str: NONE_STR,
|
||
});
|
||
}
|
||
}
|
||
}
|
||
for i in 0..n.named_child_count() {
|
||
if let Some(c) = n.named_child(i) {
|
||
stack.push(c);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// NAME_STOPLIST (function-ref.ts).
|
||
fn is_stoplisted(name: &str) -> bool {
|
||
matches!(
|
||
name,
|
||
"this" | "self" | "super" | "null" | "nil" | "true" | "false" | "undefined" | "new"
|
||
| "NULL" | "nullptr" | "None"
|
||
)
|
||
}
|
||
|
||
/// `s.replace(/\s+/g, ' ').trim()` with JavaScript's `\s` class, so a receiver
|
||
/// qualifier is byte-identical to the one TreeSitterExtractor emits. Rust's
|
||
/// `char::is_whitespace` is NOT the same set: it counts U+0085 (NEL), which JS
|
||
/// `\s` does not, and omits U+FEFF (ZWNBSP), which JS `\s` includes.
|
||
fn collapse_js_whitespace(s: &str) -> String {
|
||
fn is_js_space(c: char) -> bool {
|
||
matches!(
|
||
c,
|
||
'\t' | '\n' | '\u{b}' | '\u{c}' | '\r' | ' ' | '\u{a0}' | '\u{feff}'
|
||
| '\u{2028}' | '\u{2029}'
|
||
| '\u{1680}' | '\u{2000}'..='\u{200a}' | '\u{202f}' | '\u{205f}' | '\u{3000}'
|
||
)
|
||
}
|
||
let mut out = String::with_capacity(s.len());
|
||
let mut in_space = false;
|
||
for c in s.chars() {
|
||
if is_js_space(c) {
|
||
in_space = true;
|
||
} else {
|
||
if in_space && !out.is_empty() {
|
||
out.push(' ');
|
||
}
|
||
in_space = false;
|
||
out.push(c);
|
||
}
|
||
}
|
||
out
|
||
}
|
||
|
||
/// LITERAL_RECEIVER_TYPES membership (shared table; python names among them).
|
||
fn is_literal_receiver(kind: &str) -> bool {
|
||
matches!(
|
||
kind,
|
||
"string" | "string_literal" | "interpreted_string_literal" | "raw_string_literal"
|
||
| "template_string" | "concatenated_string" | "formatted_string" | "f_string"
|
||
| "line_string_literal" | "string_content" | "heredoc_body"
|
||
| "number" | "number_literal" | "integer" | "integer_literal" | "float"
|
||
| "float_literal" | "int_literal" | "decimal_integer_literal" | "real_literal"
|
||
| "char_literal" | "character_literal" | "rune_literal" | "regex" | "regex_literal"
|
||
| "true" | "false" | "boolean_literal" | "bool_literal" | "none" | "null" | "nil"
|
||
| "null_literal" | "undefined"
|
||
| "list" | "list_literal" | "array" | "array_literal" | "array_creation_expression"
|
||
| "dictionary" | "dict_literal" | "object" | "tuple" | "set"
|
||
)
|
||
}
|
||
|
||
fn opt_str(arena: &mut Arena, s: Option<&str>) -> StrRef {
|
||
match s {
|
||
Some(s) => arena.put(s),
|
||
None => NONE_STR,
|
||
}
|
||
}
|