Initial commit for linter prototype

src/linter.rs

@@ -0,0 +1,45 @@
+use std::path::Path;
+
+use anyhow::Result;
+use log::debug;
+use serde::{Deserialize, Serialize};
+
+use crate::check::check_ast;
+use crate::message::Message;
+use crate::{cache, parser};
+
+#[derive(Serialize, Deserialize)]
+struct CacheMetadata {
+    size: u64,
+    mtime: i64,
+}
+
+#[derive(Serialize, Deserialize)]
+struct CheckResult {
+    metadata: CacheMetadata,
+    messages: Vec<Message>,
+}
+
+pub fn check_path(path: &Path) -> Result<Vec<Message>> {
+    // TODO(charlie): These specific files are causing a stack overflow.
+    if path.to_string_lossy().eq_ignore_ascii_case(
+         "../../spring-experiments/spr_experiments/spr_experiments/assayworks/experiments/order_20220204/pipeline_steps.py") ||
+        path.to_string_lossy().eq_ignore_ascii_case
+        ( "../../spring-experiments/spr_platform/spr_platform/data_index/bigquery_index.py")
+    {
+        return Ok(vec![]);
+    }
+
+    // Check the cache.
+    if let Some(messages) = cache::get(path) {
+        debug!("Cache hit for: {}", path.to_string_lossy());
+        return Ok(messages);
+    }
+
+    // Run the linter.
+    let python_ast = parser::parse(path)?;
+    let messages = check_ast(path, &python_ast);
+    cache::set(path, &messages);
+
+    Ok(messages)
+}