feat: support MNEMON_DATA_DIR env var for data directory override

Grivn · claude · Grivn · commit 39bfb5da5c4d · 2026-02-22T21:59:32.000+08:00
Allows setting the base data directory via environment variable,
useful for containers where the default ~/.mnemon path is ephemeral.

Co-Authored-By: Claude Opus 4.6 &lt;noreply@anthropic.com&gt;
diff --git a/cmd/root.go b/cmd/root.go
@@ -32,7 +32,11 @@ func Execute() {
 }
 
 func init() {
-	rootCmd.PersistentFlags().StringVar(&dataDir, "data-dir", store.DefaultDataDir(), "base data directory")
+	defaultDataDir := store.DefaultDataDir()
+	if env := os.Getenv("MNEMON_DATA_DIR"); env != "" {
+		defaultDataDir = env
+	}
+	rootCmd.PersistentFlags().StringVar(&dataDir, "data-dir", defaultDataDir, "base data directory (env: MNEMON_DATA_DIR)")
 	rootCmd.PersistentFlags().StringVar(&storeName, "store", "", "named memory store (overrides MNEMON_STORE and active file)")
 	rootCmd.PersistentFlags().BoolVar(&readOnly, "readonly", false, "open database in read-only mode (no WAL files, safe for read-only mounts)")
 }

Original file line number	Diff line number	Diff line change
`@@ -32,7 +32,11 @@ func Execute() {`
`32`	`32`	`}`
`33`	`33`
`34`	`34`	`func init() {`
`35`		`- rootCmd.PersistentFlags().StringVar(&dataDir, "data-dir", store.DefaultDataDir(), "base data directory")`
	`35`	`+ defaultDataDir := store.DefaultDataDir()`
	`36`	`+ if env := os.Getenv("MNEMON_DATA_DIR"); env != "" {`
	`37`	`+ defaultDataDir = env`
	`38`	`+ }`
	`39`	`+ rootCmd.PersistentFlags().StringVar(&dataDir, "data-dir", defaultDataDir, "base data directory (env: MNEMON_DATA_DIR)")`
`36`	`40`	`rootCmd.PersistentFlags().StringVar(&storeName, "store", "", "named memory store (overrides MNEMON_STORE and active file)")`
`37`	`41`	`rootCmd.PersistentFlags().BoolVar(&readOnly, "readonly", false, "open database in read-only mode (no WAL files, safe for read-only mounts)")`
`38`	`42`	`}`