add debug logs

Author: vbvictor

llvm/utils/git/code-format-helper.py

@@ -493,8 +493,25 @@ def format_run(self, changed_files: List[str], args: FormatArgs) -> Optional[str
         if not self.should_run(changed_files):
             return None
 
+        # Debug logging
+        if args.verbose:
+            print(f"=== Debug: DumpASTMatchersHelper ===")
+            print(f"Current working directory: {os.getcwd()}")
+            print(f"Script directory: {self.script_dir}")
+            print(f"Script name: {self.script_name}")
+            print(f"Script full path: {os.path.join(self.script_dir, self.script_name)}")
+            print(f"Script exists: {os.path.exists(os.path.join(self.script_dir, self.script_name))}")
+            print(f"Output HTML path: {self.output_html}")
+            print(f"Output HTML exists: {os.path.exists(self.output_html)}")
+
         # Verify the input file exists
         matchers_header = "clang/include/clang/ASTMatchers/ASTMatchers.h"
+        if args.verbose:
+            print(f"Input header path: {matchers_header}")
+            print(f"Input header exists: {os.path.exists(matchers_header)}")
+            if os.path.exists(matchers_header):
+                print(f"Input header absolute path: {os.path.abspath(matchers_header)}")
+
         if not os.path.exists(matchers_header):
             return f"Input file not found: {matchers_header}"
 
@@ -510,6 +527,13 @@ def format_run(self, changed_files: List[str], args: FormatArgs) -> Optional[str
             cwd=self.script_dir,
         )
 
+        if args.verbose:
+            print(f"Script exit code: {proc.returncode}")
+            if proc.stdout:
+                print(f"Script STDOUT (first 500 chars): {proc.stdout[:500]}")
+            if proc.stderr:
+                print(f"Script STDERR (first 500 chars): {proc.stderr[:500]}")
+
         if proc.returncode != 0:
             error_msg = f"Execution of 'dump_ast_matchers.py' failed with exit code {proc.returncode}"
             if proc.stderr:
@@ -522,15 +546,26 @@ def format_run(self, changed_files: List[str], args: FormatArgs) -> Optional[str
 
         # Check if 'LibASTMatchersReference.html' file was modified
         cmd = ["git", "diff", "--exit-code", self.output_html]
+        if args.verbose:
+            print(f"Checking if output HTML was modified: {' '.join(cmd)}")
+
         proc = subprocess.run(
             cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, encoding="utf-8"
         )
 
+        if args.verbose:
+            print(f"Git diff exit code: {proc.returncode}")
+            if proc.returncode != 0:
+                print(f"Output HTML was modified (diff length: {len(proc.stdout)} chars)")
+            else:
+                print(f"Output HTML was NOT modified - check passed!")
+
         # 'LibASTMatchersReference.html' was modified - count as failure
         if proc.returncode != 0:
             if args.verbose:
-                print(f"error: {self.name} exited with code {proc.returncode}")
-                print(proc.stdout)
+                print(f"error: {self.name} detected that {self.output_html} was modified")
+                print(f"This means the developer needs to run the script locally")
+                print(f"Diff preview (first 500 chars):\n{proc.stdout[:500]}")
             return proc.stdout
         else:
             return None