From 965fe76ca51b95df909320fb9a92156dda105c9e Mon Sep 17 00:00:00 2001
From: Ollie Agent <ollie@example.com>
Date: Sun, 19 Jul 2026 20:40:56 +0200
Subject: [PATCH] file_grep: fall back to GNU grep when rg is unavailable

---
 tools/file_grep | 78 +++++++++++++++++++++++++++++++++----------------
 1 file changed, 53 insertions(+), 25 deletions(-)

diff --git a/tools/file_grep b/tools/file_grep
index 1401bdb..6e2b750 100644
--- a/tools/file_grep
+++ b/tools/file_grep
@@ -1,11 +1,12 @@
 #!/usr/bin/env python3
 # ollie:parallel read
-# description: Search file contents using ripgrep. Default output: file:lineno| content (one match per line).
+# description: Search file contents using ripgrep (or grep fallback). Default output: file:lineno| content (one match per line).
 # Args: <pattern> [--path=<dir>] [--mode=files_with_matches|content|count] [--glob=<pattern>] [--type=<type>] [-i] [-A <n>] [-B <n>] [-C <n>] [--multiline] [--head=<n>] [--offset=<n>]
 
 import sys
 import os
 import subprocess
+import shutil
 import argparse
 
 parser = argparse.ArgumentParser(prog='file_grep', add_help=False)
@@ -28,32 +29,59 @@ args = parser.parse_args()
 
 search_path = args.path or os.getcwd()
 
-cmd = ['rg', '--no-config', '--color=never']
+use_rg = shutil.which('rg') is not None
 
-if args.mode == 'files_with_matches':
-    cmd.append('-l')
-elif args.mode == 'count':
-    cmd.append('--count')
-elif args.mode == 'content':
-    if args.n:
-        cmd.append('-n')
+if use_rg:
+    cmd = ['rg', '--no-config', '--color=never']
 
-if args.i:
-    cmd.append('-i')
-if args.multiline:
-    cmd += ['-U', '--multiline-dotall']
-if args.glob:
-    cmd += ['-g', args.glob]
-if args.type:
-    cmd += ['-t', args.type]
-if args.C is not None:
-    cmd += ['-C', str(args.C)]
-if args.A is not None:
-    cmd += ['-A', str(args.A)]
-if args.B is not None:
-    cmd += ['-B', str(args.B)]
+    if args.mode == 'files_with_matches':
+        cmd.append('-l')
+    elif args.mode == 'count':
+        cmd.append('--count')
+    elif args.mode == 'content':
+        if args.n:
+            cmd.append('-n')
 
-cmd += ['-e', args.pattern, search_path]
+    if args.i:
+        cmd.append('-i')
+    if args.multiline:
+        cmd += ['-U', '--multiline-dotall']
+    if args.glob:
+        cmd += ['-g', args.glob]
+    if args.type:
+        cmd += ['-t', args.type]
+    if args.C is not None:
+        cmd += ['-C', str(args.C)]
+    if args.A is not None:
+        cmd += ['-A', str(args.A)]
+    if args.B is not None:
+        cmd += ['-B', str(args.B)]
+
+    cmd += ['-e', args.pattern, search_path]
+else:
+    # Fallback to GNU grep -r
+    cmd = ['grep', '-r', '--color=never']
+
+    if args.mode == 'files_with_matches':
+        cmd.append('-l')
+    elif args.mode == 'count':
+        cmd.append('-c')
+    elif args.mode == 'content':
+        if args.n:
+            cmd.append('-n')
+
+    if args.i:
+        cmd.append('-i')
+    if args.glob:
+        cmd += ['--include=' + args.glob]
+    if args.C is not None:
+        cmd += ['-C', str(args.C)]
+    if args.A is not None:
+        cmd += ['-A', str(args.A)]
+    if args.B is not None:
+        cmd += ['-B', str(args.B)]
+
+    cmd += ['-e', args.pattern, search_path]
 
 result = subprocess.run(cmd, capture_output=True, text=True)
 if result.returncode == 1:
@@ -62,7 +90,7 @@ if result.returncode == 1:
     sys.exit(0)
 if result.returncode > 1:
     print(f"STATUS=error")
-    print(f"error: {result.stderr.strip() or f'rg exited with {result.returncode}'}")
+    print(f"error: {result.stderr.strip() or f'search exited with {result.returncode}'}")
     sys.exit(1)
 
 lines = result.stdout.splitlines()