Support glob pattern (like *.h) in the search_files tool

filesystemserver/handler.go

@@ -13,6 +13,7 @@ import (
 	"time"
 
 	"github.com/gabriel-vasile/mimetype"
+	"github.com/gobwas/glob"
 	"github.com/mark3labs/mcp-go/mcp"
 	"slices"
 )
@@ -252,7 +253,7 @@ func (fs *FilesystemHandler) searchFiles(
 	rootPath, pattern string,
 ) ([]string, error) {
 	var results []string
-	pattern = strings.ToLower(pattern)
+	globPattern := glob.MustCompile(pattern)
 
 	err := filepath.Walk(
 		rootPath,
@@ -266,7 +267,7 @@ func (fs *FilesystemHandler) searchFiles(
 				return nil // Skip invalid paths
 			}
 
-			if strings.Contains(strings.ToLower(info.Name()), pattern) {
+			if globPattern.Match(info.Name()) {
 				results = append(results, path)
 			}
 			return nil

filesystemserver/handler_test.go

@@ -68,3 +68,68 @@ func TestReadfile_NoAccess(t *testing.T) {
 	assert.True(t, result.IsError)
 	assert.Contains(t, fmt.Sprint(result.Content[0]), "access denied - path outside allowed directories")
 }
+
+func TestSearchFiles_Pattern(t *testing.T) {
+
+	// setting up test folder
+	// tmpDir/
+	// - foo/
+	//   - bar.h
+	//   - test.c
+	// - test.h
+	// - test.c
+
+	dir := t.TempDir()
+	test_h := filepath.Join(dir, "test.h")
+	err := os.WriteFile(test_h, []byte("foo"), 0644)
+	require.NoError(t, err)
+
+	test_c := filepath.Join(dir, "test.c")
+	err = os.WriteFile(test_c, []byte("foo"), 0644)
+	require.NoError(t, err)
+
+	fooDir := filepath.Join(dir, "foo")
+	err = os.MkdirAll(fooDir, 0755)
+	require.NoError(t, err)
+
+	foo_bar_h := filepath.Join(fooDir, "bar.h")
+	err = os.WriteFile(foo_bar_h, []byte("foo"), 0644)
+	require.NoError(t, err)
+
+	foo_test_c := filepath.Join(fooDir, "test.c")
+	err = os.WriteFile(foo_test_c, []byte("foo"), 0644)
+	require.NoError(t, err)
+
+	handler, err := NewFilesystemHandler([]string{dir})
+	require.NoError(t, err)
+
+	tests := []struct {
+		info    string
+		pattern string
+		matches []string
+	}{
+		{info: "use placeholder with extension", pattern: "*.h", matches: []string{test_h, foo_bar_h}},
+		{info: "use placeholder with name", pattern: "test.*", matches: []string{test_h, test_c}},
+		{info: "same filename", pattern: "test.c", matches: []string{test_c, foo_test_c}},
+	}
+
+	for _, test := range tests {
+		t.Run(test.info, func(t *testing.T) {
+			request := mcp.CallToolRequest{}
+			request.Params.Name = "search_files"
+			request.Params.Arguments = map[string]any{
+				"path":    dir,
+				"pattern": test.pattern,
+			}
+
+			result, err := handler.handleSearchFiles(context.Background(), request)
+			require.NoError(t, err)
+			assert.False(t, result.IsError)
+			assert.Len(t, result.Content, 1)
+
+			for _, match := range test.matches {
+				assert.Contains(t, result.Content[0].(mcp.TextContent).Text, match)
+			}
+		})
+	}
+}

go.mod

@@ -4,6 +4,7 @@ go 1.23.2
 
 require (
 	github.com/gabriel-vasile/mimetype v1.4.3
+	github.com/gobwas/glob v0.2.3
 	github.com/mark3labs/mcp-go v0.26.0
 	github.com/stretchr/testify v1.9.0
 )

go.sum

@@ -4,6 +4,8 @@ github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHk
 github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
 github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
 github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk=
+github.com/gobwas/glob v0.2.3 h1:A4xDbljILXROh+kObIiy5kIaPYD8e96x1tgBhUI5J+Y=
+github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJAkT8=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=