Add ability to ignore patterns directly from cli (#4)

* Add ability to ignore patterns directly from cli
* Updated for latest changes to main

---------

Co-authored-by: Simon Willison <swillison@gmail.com>

files_to_prompt/cli.py

@@ -23,7 +23,9 @@ def read_gitignore(path):
     return []
 
 
-def process_path(path, include_hidden, ignore_gitignore, gitignore_rules):
+def process_path(
+    path, include_hidden, ignore_gitignore, gitignore_rules, ignore_patterns
+):
     if os.path.isfile(path):
         with open(path, "r") as f:
             file_contents = f.read()
@@ -51,6 +53,13 @@ def process_path(path, include_hidden, ignore_gitignore, gitignore_rules):
                     if not should_ignore(os.path.join(root, f), gitignore_rules)
                 ]
 
+            if ignore_patterns:
+                files = [
+                    f
+                    for f in files
+                    if not any(fnmatch(f, pattern) for pattern in ignore_patterns)
+                ]
+
             for file in files:
                 file_path = os.path.join(root, file)
                 with open(file_path, "r") as f:
@@ -75,8 +84,14 @@ def process_path(path, include_hidden, ignore_gitignore, gitignore_rules):
     is_flag=True,
     help="Ignore .gitignore files and include all files",
 )
+@click.option(
+    "--ignore-patterns",
+    multiple=True,
+    default=[],
+    help="List of patterns to ignore",
+)
 @click.version_option()
-def cli(paths, include_hidden, ignore_gitignore):
+def cli(paths, include_hidden, ignore_gitignore, ignore_patterns):
     """
     Takes one or more paths to files or directories and outputs every file,
     recursively, each one preceded with its filename like this:
@@ -96,4 +111,6 @@ def cli(paths, include_hidden, ignore_gitignore):
             raise click.BadArgumentUsage(f"Path does not exist: {path}")
         if not ignore_gitignore:
             gitignore_rules.extend(read_gitignore(os.path.dirname(path)))
-        process_path(path, include_hidden, ignore_gitignore, gitignore_rules)
+        process_path(
+            path, include_hidden, ignore_gitignore, gitignore_rules, ignore_patterns
+        )

tests/test_files_to_prompt.py

@@ -82,6 +82,31 @@ def test_multiple_paths(tmpdir):
         assert "Contents of single file" in result.output
 
 
+def test_ignore_patterns(tmpdir):
+    runner = CliRunner()
+    with tmpdir.as_cwd():
+        os.makedirs("test_dir")
+        with open("test_dir/file_to_ignore.txt", "w") as f:
+            f.write("This file should be ignored due to ignore patterns")
+        with open("test_dir/file_to_include.txt", "w") as f:
+            f.write("This file should be included")
+
+        result = runner.invoke(cli, ["test_dir", "--ignore-patterns", "*.txt"])
+        assert result.exit_code == 0
+        assert "test_dir/file_to_ignore.txt" not in result.output
+        assert "This file should be ignored due to ignore patterns" not in result.output
+        assert "test_dir/file_to_include.txt" not in result.output
+
+        result = runner.invoke(
+            cli, ["test_dir", "--ignore-patterns", "file_to_ignore.*"]
+        )
+        assert result.exit_code == 0
+        assert "test_dir/file_to_ignore.txt" not in result.output
+        assert "This file should be ignored due to ignore patterns" not in result.output
+        assert "test_dir/file_to_include.txt" in result.output
+        assert "This file should be included" in result.output
+
+
 def test_mixed_paths_with_options(tmpdir):
     runner = CliRunner()
     with tmpdir.as_cwd():