add treesitter functionality

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

genaisrc/treesitter.genai.mts

@@ -3,12 +3,37 @@ script({
     files: "src/muz/spacer/spacer_qe_project.cpp"
 })
 
+// return function names and source code of the functions 
 
+function get_functions(captures : QueryCapture[], code : string) {
+    return captures.map(({ name, node }) => ({
+        code : node.text
+    }))
+}
 
 const inputFile = env.files[0];
-const { captures } = await parsers.code(inputFile);
 
-// pretty-print tree sitter parse tree of captures:
 
+const { captures: functions } = await parsers.code(
+    inputFile,
+    `(function_definition) @function`
+);
+
+
+let funs = get_functions(functions, inputFile.content);
+
+for (const fun of funs) {
+    // todo put files in a different directory
+    let name = fun.code.split('(')[0].trim();
+    name = name
+        .replace(/::/g, '_')
+        .replace(/ /g, '_');        
+    let outputFile = path.basename(inputFile.filename)
+            .replace(/\.cpp$/, `.${name}.cpp`)
+            .replace(/\.h$/, `.${name}.h`);
+    outputFile = "slice_" + outputFile;
+    outputFile = path.join("code_slices", outputFile);
+
+    await workspace.writeText(outputFile, `//Extracted ${name} in ${inputFile.filename}\n${fun.code}\n\n`);
+}
 
-console.log(JSON.stringify(captures, null,2))