From db79dbdd8b0a000e112691d3ca106473fcb8ae6e Mon Sep 17 00:00:00 2001
From: fcying <fcyingmk2@gmail.com>
Date: Tue, 18 Aug 2026 11:11:15 +0800
Subject: [PATCH] fix: create output parent directory automatically (#35)

---
 internal/init.go      |  4 ++++
 internal/init_test.go | 13 +++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/internal/init.go b/internal/init.go
index 052aec0..3b05f60 100644
--- a/internal/init.go
+++ b/internal/init.go
@@ -334,6 +334,10 @@ func (t *Tool) WriteJSON(filename string, _ int, data *[]Command) {
 	}
 	jsonData = append(jsonData, '\n')
 
+	if err := os.MkdirAll(filepath.Dir(filename), 0o755); err != nil {
+		t.Logger.Fatalf("create directory %v failed! err:%v", filepath.Dir(filename), err)
+	}
+
 	outfile, err := os.Create(filename)
 	if err != nil {
 		t.Logger.Fatalf("create %v failed! err:%v", filename, err)
diff --git a/internal/init_test.go b/internal/init_test.go
index b17d16c..8d4d457 100644
--- a/internal/init_test.go
+++ b/internal/init_test.go
@@ -786,6 +786,19 @@ func TestWriteJSONFileEndsWithOneNewline(t *testing.T) {
 	}
 }
 
+func TestWriteJSONCreatesMissingParentDirectory(t *testing.T) {
+	outputFile := filepath.Join(t.TempDir(), "build", "nested", "compile_commands.json")
+	tool := newTestTool(t, Config{OutputFile: outputFile, NoStrict: true})
+	commands := []Command{{Directory: "/project", Arguments: []string{"cc", "-c", "main.c"}, File: "main.c"}}
+
+	tool.WriteJSON(outputFile, len(commands), &commands)
+
+	entries := readTestDatabase(t, outputFile)
+	if len(entries) != 1 || entries[0]["file"] != "main.c" {
+		t.Fatalf("unexpected entries: %#v", entries)
+	}
+}
+
 func TestWriteJSONStdoutReturnsCanceledStatusWhenBlocked(t *testing.T) {
 	oldStdout := os.Stdout
 	r, w, err := os.Pipe()