feat(p10-1b): tree-sitter-python AST extractor (PythonAstExtractor)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
@@ -14,11 +14,13 @@
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//! / llm / rag.
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pub mod lang;
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pub mod python;
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pub mod repo;
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pub mod rust;
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pub mod skip;
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pub use lang::{code_lang_for_path, module_path_for_python, module_path_for_tsjs};
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pub use python::{PARSER_VERSION as PYTHON_PARSER_VERSION, PythonAstExtractor};
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pub use repo::{RepoMeta, detect_repo};
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pub use rust::{PARSER_VERSION as RUST_PARSER_VERSION, RustAstExtractor};
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pub use skip::{BUILTIN_BLACKLIST, is_generated_file, is_oversized};
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464
crates/kebab-parse-code/src/python.rs
Normal file
464
crates/kebab-parse-code/src/python.rs
Normal file
@@ -0,0 +1,464 @@
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//! `kebab-parse-code::python` — tree-sitter Python AST extractor (P10-1B Task E).
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//!
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//! Implements [`kebab_core::Extractor`] for [`MediaType::Code("python")`].
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//! Walks the tree-sitter parse tree and emits one [`Block::Code`] per
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//! top-level AST semantic unit (free fn, class, each method, recursively
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//! per nested class), each carrying [`SourceSpan::Code`] with the unit's
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//! dotted self-reference symbol path prefixed by `module_path_for_python`
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//! (design §3.4). Glue declarations (`import` / `import from` /
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//! `expression_statement` / `assignment` / `global_statement` /
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//! `future_import_statement`) collapse into one grouped `<top-level>`
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//! (or `<module>`) unit.
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//!
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//! Decorators are folded into the decorated unit's line range via the
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//! `decorated_definition` unwrap arm (analog of the Rust `attribute_item`
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//! re-absorption in 1A — see §9.1).
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//!
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//! Scope follows 1A: AST unit extraction + dotted symbol paths + line
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//! ranges. Per design §3.4 / §9.1 / §9 versioning.
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use anyhow::Result;
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use kebab_core::{
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Block, CanonicalDocument, CodeBlock, CommonBlock, Extractor, Lang, MediaType, Metadata,
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ParserVersion, Provenance, ProvenanceEvent, ProvenanceKind, SourceSpan, SourceType, TrustLevel,
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id_for_block, id_for_doc,
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};
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use serde_json::Map;
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use time::OffsetDateTime;
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pub const PARSER_VERSION: &str = "code-python-v1";
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/// Python AST extractor. Per-unit blocks via tree-sitter-python 0.25
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/// (`LANGUAGE: LanguageFn`) parsed by tree-sitter 0.26.
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pub struct PythonAstExtractor;
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impl PythonAstExtractor {
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pub fn new() -> Self {
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Self
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}
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}
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impl Default for PythonAstExtractor {
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fn default() -> Self {
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Self::new()
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}
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}
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impl Extractor for PythonAstExtractor {
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fn supports(&self, m: &MediaType) -> bool {
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matches!(m, MediaType::Code(l) if l == "python")
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}
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fn parser_version(&self) -> ParserVersion {
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ParserVersion(PARSER_VERSION.to_string())
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}
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fn extract(
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&self,
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ctx: &kebab_core::ExtractContext<'_>,
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bytes: &[u8],
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) -> Result<CanonicalDocument> {
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let asset = ctx.asset;
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if !self.supports(&asset.media_type) {
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anyhow::bail!(
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"kebab-parse-code: unsupported media_type for PythonAstExtractor: {:?}",
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asset.media_type
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);
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}
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let parser_version = self.parser_version();
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let doc_id = id_for_doc(&asset.workspace_path, &asset.asset_id, &parser_version);
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let source = String::from_utf8(bytes.to_vec()).map_err(|e| {
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anyhow::anyhow!("kebab-parse-code: Python source is not valid UTF-8: {e}")
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})?;
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let mod_prefix = crate::lang::module_path_for_python(&asset.workspace_path.0);
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let blocks = build_blocks(&source, &doc_id, &mod_prefix)?;
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let unit_count = blocks.len() as u32;
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let now = OffsetDateTime::now_utc();
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let mut events: Vec<ProvenanceEvent> = Vec::with_capacity(2);
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events.push(ProvenanceEvent {
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at: asset.discovered_at,
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agent: "kb-source-fs".to_string(),
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kind: ProvenanceKind::Discovered,
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note: None,
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});
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events.push(ProvenanceEvent {
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at: now,
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agent: "kb-parse-code".to_string(),
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kind: ProvenanceKind::Parsed,
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note: Some(format!(
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"parser_version={}; unit_count={}",
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parser_version.0, unit_count
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)),
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});
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let title = {
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let fname = filename_from_workspace_path(&asset.workspace_path.0);
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strip_extension(&fname)
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};
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// Resolve the file's absolute path for repo detection. If the
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// source URI carries a relative path, anchor it at the workspace
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// root so the `.git/` walk-up starts from the right place.
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let abs_path = match &asset.source_uri {
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kebab_core::SourceUri::File(p) => {
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if p.is_absolute() {
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p.clone()
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} else {
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ctx.workspace_root.join(p)
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}
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}
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kebab_core::SourceUri::Kb(_) => ctx.workspace_root.to_path_buf(),
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};
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let (repo, git_branch, git_commit) = match crate::repo::detect_repo(&abs_path) {
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Some(r) => (Some(r.name), r.branch, r.commit),
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None => (None, None, None),
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};
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let metadata = Metadata {
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aliases: Vec::new(),
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tags: Vec::new(),
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created_at: asset.discovered_at,
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updated_at: asset.discovered_at,
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source_type: SourceType::Note,
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trust_level: TrustLevel::Primary,
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user_id_alias: None,
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user: Map::new(),
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repo,
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git_branch,
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git_commit,
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code_lang: Some("python".to_string()),
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};
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tracing::debug!(
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target: "kebab-parse-code",
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"extracted Python doc_id={} workspace_path={} units={}",
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doc_id.0,
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asset.workspace_path.0,
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unit_count
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);
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Ok(CanonicalDocument {
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doc_id,
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source_asset_id: asset.asset_id.clone(),
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workspace_path: asset.workspace_path.clone(),
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title,
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lang: Lang("und".to_string()),
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blocks,
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metadata,
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provenance: Provenance { events },
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parser_version,
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schema_version: 1,
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doc_version: 1,
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last_chunker_version: None,
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last_embedding_version: None,
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})
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}
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}
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fn filename_from_workspace_path(p: &str) -> String {
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p.rsplit('/').next().unwrap_or(p).to_string()
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}
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fn strip_extension(filename: &str) -> String {
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match filename.rfind('.') {
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Some(0) => filename.to_string(),
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Some(idx) => filename[..idx].to_string(),
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None => filename.to_string(),
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}
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}
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/// Join (mod_prefix, mod_path, name) into a dotted Python symbol.
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///
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/// Empty `mod_prefix` (e.g. file is `__init__.py` at workspace root)
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/// drops the leading prefix segment; empty `mod_path` (file top-level)
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/// drops the class-nesting middle.
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fn join_symbol(mod_prefix: &str, mod_path: &[String], name: &str) -> String {
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let mut parts: Vec<&str> = Vec::with_capacity(mod_path.len() + 2);
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if !mod_prefix.is_empty() {
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parts.push(mod_prefix);
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}
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for p in mod_path {
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parts.push(p.as_str());
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}
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parts.push(name);
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parts.join(".")
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}
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fn build_blocks(
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source: &str,
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doc_id: &kebab_core::DocumentId,
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mod_prefix: &str,
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) -> anyhow::Result<Vec<kebab_core::Block>> {
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let mut parser = tree_sitter::Parser::new();
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parser
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.set_language(&tree_sitter_python::LANGUAGE.into())
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.map_err(|e| anyhow::anyhow!("set tree-sitter-python language: {e}"))?;
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let tree = parser
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.parse(source.as_bytes(), None)
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.ok_or_else(|| anyhow::anyhow!("tree-sitter failed to parse Python source"))?;
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let lines: Vec<&str> = source.split('\n').collect();
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// units: (symbol, line_start, line_end, is_real_semantic_unit).
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// Glue groups are pushed with a sentinel symbol + is_real=false so a
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// post-pass can decide `<module>` vs `<top-level>` (same algorithm
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// as 1A Gap 1).
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let mut units: Vec<(String, u32, u32, bool)> = Vec::new();
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// (is_import 0/1, s, e). `is_import` flags `import_statement` /
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// `import_from_statement` / `future_import_statement` — used by the
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// glue flush to pick `<module>` vs `<top-level>` provisional label
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// (1A's `is_mod_decl` analog).
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let mut glue: Vec<(usize, u32, u32)> = Vec::new();
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fn node_name<'a>(n: &tree_sitter::Node, src: &'a str) -> Option<&'a str> {
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n.child_by_field_name("name")
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.map(|c| &src[c.start_byte()..c.end_byte()])
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}
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/// Walk preceding `comment` siblings to extend the unit's line range
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/// upward, folding leading doc / line comments into the unit. Note
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/// that Python decorators are NOT preceding siblings — they live
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/// INSIDE a `decorated_definition` parent — so they are handled by
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/// the unwrap arm below, not here.
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fn unit_start(n: &tree_sitter::Node) -> u32 {
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let mut start = n.start_position().row as u32 + 1;
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let mut prev = n.prev_sibling();
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while let Some(p) = prev {
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if p.kind() == "comment" {
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start = p.start_position().row as u32 + 1;
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prev = p.prev_sibling();
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} else {
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break;
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}
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}
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start
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}
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fn walk(
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node: tree_sitter::Node,
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src: &str,
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mod_prefix: &str,
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mod_path: &[String],
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units: &mut Vec<(String, u32, u32, bool)>,
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glue: &mut Vec<(usize, u32, u32)>,
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) {
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let mut cur = node.walk();
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for child in node.named_children(&mut cur) {
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// Default unit line range — overridden by the
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// `decorated_definition` unwrap arm so decorator lines are
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// included.
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let s = unit_start(&child);
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let e = child.end_position().row as u32 + 1;
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match child.kind() {
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"function_definition" => {
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if let Some(name) = node_name(&child, src) {
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glue.retain(|(_, gs, _)| *gs < s);
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flush_glue(glue, units, mod_prefix, mod_path);
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let sym = join_symbol(mod_prefix, mod_path, name);
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units.push((sym, s, e, true));
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}
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}
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"class_definition" => {
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if let Some(name) = node_name(&child, src) {
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glue.retain(|(_, gs, _)| *gs < s);
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flush_glue(glue, units, mod_prefix, mod_path);
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let sym = join_symbol(mod_prefix, mod_path, name);
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units.push((sym, s, e, true));
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// Recurse into the class body with the class
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// name pushed onto mod_path; methods become
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// `<...>.<ClassName>.<method>` and nested
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// classes recurse further with both names.
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if let Some(body) = child.child_by_field_name("body") {
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let mut np = mod_path.to_vec();
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np.push(name.to_string());
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walk(body, src, mod_prefix, &np, units, glue);
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debug_assert!(
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glue.is_empty(),
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"inner walk must flush its glue before returning"
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);
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}
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}
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}
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"decorated_definition" => {
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// Unwrap: the inner definition supplies the symbol
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// name, but the unit's line range comes from the
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// OUTER `decorated_definition` so decorator lines
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// are folded in (analog of `attribute_item`
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// re-absorption in 1A — see plan §Task E note (b)).
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if let Some(inner) = child.child_by_field_name("definition") {
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let outer_s = s; // already includes decorators
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let outer_e = e;
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match inner.kind() {
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"function_definition" => {
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if let Some(name) = node_name(&inner, src) {
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glue.retain(|(_, gs, _)| *gs < outer_s);
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flush_glue(glue, units, mod_prefix, mod_path);
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let sym = join_symbol(mod_prefix, mod_path, name);
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units.push((sym, outer_s, outer_e, true));
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}
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}
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"class_definition" => {
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if let Some(name) = node_name(&inner, src) {
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glue.retain(|(_, gs, _)| *gs < outer_s);
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flush_glue(glue, units, mod_prefix, mod_path);
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let sym = join_symbol(mod_prefix, mod_path, name);
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units.push((sym, outer_s, outer_e, true));
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if let Some(body) = inner.child_by_field_name("body") {
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let mut np = mod_path.to_vec();
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np.push(name.to_string());
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walk(body, src, mod_prefix, &np, units, glue);
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debug_assert!(
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glue.is_empty(),
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"inner walk must flush its glue before returning"
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);
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}
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}
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}
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_ => {}
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}
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}
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}
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"import_statement" | "import_from_statement" | "future_import_statement" => {
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glue.push((1, s, e));
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}
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"expression_statement" | "assignment" | "global_statement" => {
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glue.push((0, s, e));
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}
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_ => {}
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}
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}
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flush_glue(glue, units, mod_prefix, mod_path);
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}
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fn flush_glue(
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glue: &mut Vec<(usize, u32, u32)>,
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units: &mut Vec<(String, u32, u32, bool)>,
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mod_prefix: &str,
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mod_path: &[String],
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) {
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if glue.is_empty() {
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return;
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}
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let s = glue.iter().map(|(_, a, _)| *a).min().unwrap();
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let e = glue.iter().map(|(_, _, b)| *b).max().unwrap();
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// Provisional label: `<module>` only if the group is exclusively
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// imports (1A's `only_mod_decls` analog). The post-pass below
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// demotes any `<module>` to `<top-level>` if the file produced
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// any real unit.
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let only_imports = glue.iter().all(|(is_import, _, _)| *is_import == 1);
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let label = if only_imports { "<module>" } else { "<top-level>" };
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units.push((join_symbol(mod_prefix, mod_path, label), s, e, false));
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glue.clear();
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}
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walk(tree.root_node(), source, mod_prefix, &[], &mut units, &mut glue);
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// `<module>` is correct only when the file produced no real unit.
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// Otherwise the import-only group becomes `<top-level>` (same
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// algorithm as 1A Gap 1). Match on the suffix so a class-nested
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// glue group (which doesn't exist in current Python AST but is
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// future-proofed) still demotes correctly.
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let has_real_unit = units.iter().any(|(_, _, _, is_real)| *is_real);
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if has_real_unit {
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for (sym, _, _, is_real) in units.iter_mut() {
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if !*is_real && sym.ends_with("<module>") {
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let pre = &sym[..sym.len() - "<module>".len()];
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*sym = format!("{pre}<top-level>");
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}
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}
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}
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let total_lines = lines.len() as u32;
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let mut blocks = Vec::with_capacity(units.len());
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for (ordinal, (symbol, ls, le, _is_real)) in units.into_iter().enumerate() {
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let line_start = ls.max(1);
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let line_end = le.min(total_lines.max(1));
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let span = SourceSpan::Code {
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line_start,
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line_end,
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symbol: Some(symbol),
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lang: Some("python".to_string()),
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};
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let block_id = id_for_block(doc_id, "code", &[], ordinal as u32, &span);
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let code = lines[(line_start as usize - 1)..=(line_end as usize - 1)].join("\n");
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blocks.push(Block::Code(CodeBlock {
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common: CommonBlock {
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block_id,
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heading_path: Vec::new(),
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source_span: span,
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},
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lang: Some("python".to_string()),
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code,
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}));
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}
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Ok(blocks)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
|
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use kebab_core::{Block, MediaType, SourceSpan};
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|
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fn extract_fixture() -> kebab_core::CanonicalDocument {
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let bytes = std::fs::read(
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concat!(env!("CARGO_MANIFEST_DIR"), "/tests/fixtures/sample.py"),
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)
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.unwrap();
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let asset = crate::rust::tests_support::fixed_code_asset(
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"kebab_eval/metrics.py", "python",
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);
|
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let cfg = kebab_core::ExtractConfig::default();
|
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let root = std::path::PathBuf::from("/tmp");
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let ctx = kebab_core::ExtractContext {
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asset: &asset, workspace_root: &root, config: &cfg,
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||||
};
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PythonAstExtractor::new().extract(&ctx, &bytes).unwrap()
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||||
}
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||||
|
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#[test]
|
||||
fn extractor_supports_only_media_code_python() {
|
||||
let e = PythonAstExtractor::new();
|
||||
assert!(e.supports(&MediaType::Code("python".into())));
|
||||
assert!(!e.supports(&MediaType::Code("rust".into())));
|
||||
assert!(!e.supports(&MediaType::Markdown));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn python_units_carry_module_prefixed_symbols() {
|
||||
let doc = extract_fixture();
|
||||
let mut syms: Vec<String> = doc.blocks.iter().map(|b| match b {
|
||||
Block::Code(c) => match &c.common.source_span {
|
||||
SourceSpan::Code { symbol, lang, .. } => {
|
||||
assert_eq!(lang.as_deref(), Some("python"));
|
||||
symbol.clone().unwrap()
|
||||
}
|
||||
_ => panic!("expected SourceSpan::Code"),
|
||||
},
|
||||
other => panic!("expected Block::Code, got {other:?}"),
|
||||
}).collect();
|
||||
syms.sort();
|
||||
assert!(syms.iter().any(|s| s == "kebab_eval.metrics.free"));
|
||||
assert!(syms.iter().any(|s| s == "kebab_eval.metrics.Foo"));
|
||||
assert!(syms.iter().any(|s| s == "kebab_eval.metrics.Foo.double"));
|
||||
assert!(syms.iter().any(|s| s == "kebab_eval.metrics.Foo.name"));
|
||||
assert!(syms.iter().any(|s| s == "kebab_eval.metrics.Outer"));
|
||||
assert!(syms.iter().any(|s| s == "kebab_eval.metrics.Outer.Inner"));
|
||||
assert!(syms.iter().any(|s| s == "kebab_eval.metrics.Outer.Inner.helper"));
|
||||
assert!(syms.iter().any(|s| s == "kebab_eval.metrics.with_decorator"));
|
||||
assert!(syms.iter().any(|s| s == "kebab_eval.metrics.<top-level>"));
|
||||
// The `@staticmethod` decorator on `free` is folded into its
|
||||
// unit's line range (decorated_definition unwrap).
|
||||
let free_src = doc.blocks.iter().find_map(|b| match b {
|
||||
Block::Code(c) if matches!(&c.common.source_span,
|
||||
SourceSpan::Code{symbol,..} if symbol.as_deref()==Some("kebab_eval.metrics.free")) => Some(c.code.clone()),
|
||||
_ => None,
|
||||
}).unwrap();
|
||||
assert!(free_src.contains("@staticmethod"), "decorator folded in: {free_src}");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn deterministic_across_runs() {
|
||||
let a = extract_fixture();
|
||||
for _ in 0..50 { assert_eq!(extract_fixture().blocks, a.blocks); }
|
||||
}
|
||||
}
|
||||
@@ -393,7 +393,7 @@ mod tests {
|
||||
concat!(env!("CARGO_MANIFEST_DIR"), "/tests/fixtures/sample.rs"),
|
||||
)
|
||||
.unwrap();
|
||||
let asset = kebab_parse_code_test_support::fixed_rust_asset("crates/x/src/sample.rs");
|
||||
let asset = tests_support::fixed_code_asset("crates/x/src/sample.rs", "rust");
|
||||
let cfg = kebab_core::ExtractConfig::default();
|
||||
let root = std::path::PathBuf::from("/tmp");
|
||||
let ctx = kebab_core::ExtractContext { asset: &asset, workspace_root: &root, config: &cfg };
|
||||
@@ -444,7 +444,7 @@ mod tests {
|
||||
/// Run the extractor on an in-memory Rust source string (no fixture
|
||||
/// file) and return (symbol, code) for every emitted block.
|
||||
fn extract_inline(source: &str) -> Vec<(String, String)> {
|
||||
let asset = kebab_parse_code_test_support::fixed_rust_asset("crates/x/src/inline.rs");
|
||||
let asset = tests_support::fixed_code_asset("crates/x/src/inline.rs", "rust");
|
||||
let cfg = kebab_core::ExtractConfig::default();
|
||||
let root = std::path::PathBuf::from("/tmp");
|
||||
let ctx = kebab_core::ExtractContext { asset: &asset, workspace_root: &root, config: &cfg };
|
||||
@@ -531,20 +531,23 @@ mod tests {
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod kebab_parse_code_test_support {
|
||||
pub(crate) mod tests_support {
|
||||
use kebab_core::*;
|
||||
use time::OffsetDateTime;
|
||||
pub fn fixed_rust_asset(path: &str) -> RawAsset {
|
||||
/// Test-only `RawAsset` builder for any tree-sitter language. Shared
|
||||
/// across `rust.rs` / `python.rs` / future TS+JS extractor tests so all
|
||||
/// in-crate code-extractor tests use a single canonical fixture shape.
|
||||
pub fn fixed_code_asset(workspace_path: &str, code_lang: &str) -> RawAsset {
|
||||
RawAsset {
|
||||
asset_id: AssetId("a".repeat(64)),
|
||||
source_uri: SourceUri::File(std::path::PathBuf::from(path)),
|
||||
workspace_path: WorkspacePath(path.to_string()),
|
||||
media_type: MediaType::Code("rust".to_string()),
|
||||
source_uri: SourceUri::File(std::path::PathBuf::from(workspace_path)),
|
||||
workspace_path: WorkspacePath(workspace_path.to_string()),
|
||||
media_type: MediaType::Code(code_lang.to_string()),
|
||||
byte_len: 0,
|
||||
checksum: Checksum("b".repeat(64)),
|
||||
discovered_at: OffsetDateTime::from_unix_timestamp(1_700_000_000).unwrap(),
|
||||
stored: AssetStorage::Reference {
|
||||
path: std::path::PathBuf::from(path),
|
||||
path: std::path::PathBuf::from(workspace_path),
|
||||
sha: Checksum("b".repeat(64)),
|
||||
},
|
||||
}
|
||||
|
||||
26
crates/kebab-parse-code/tests/fixtures/sample.py
vendored
Normal file
26
crates/kebab-parse-code/tests/fixtures/sample.py
vendored
Normal file
@@ -0,0 +1,26 @@
|
||||
"""sample fixture."""
|
||||
import os
|
||||
|
||||
ANSWER = 42
|
||||
|
||||
@staticmethod
|
||||
def free(x):
|
||||
"""free fn."""
|
||||
return x + 1
|
||||
|
||||
class Foo:
|
||||
"""doc."""
|
||||
def double(self, n):
|
||||
return n * 2
|
||||
|
||||
@classmethod
|
||||
def name(cls):
|
||||
return "foo"
|
||||
|
||||
class Outer:
|
||||
class Inner:
|
||||
def helper(self):
|
||||
return True
|
||||
|
||||
def with_decorator():
|
||||
pass
|
||||
Reference in New Issue
Block a user