v0.2.15 - Add --database-path command line parameter for database location override

- Added -D/--database-path parameter to specify custom database file location
- Fixed port override timing to apply after configuration system initialization
- Updated help message with examples showing database path usage
- Supports both absolute and relative paths for database location
- Enables running multiple relay instances with separate databases
- Resolves database path issues when running from /usr/local/bin

relay.pid

@@ -1 +1 @@
-913504
+943745

src/main.c

@@ -1941,8 +1941,15 @@ int validate_event_expiration(cJSON* event, char* error_message, size_t error_si
 
 // Initialize database connection and schema
 int init_database() {
-    // Use configurable database path, falling back to default
-    const char* db_path = get_config_value("database_path");
+    // Priority 1: Command line database path override
+    const char* db_path = getenv("C_RELAY_DATABASE_PATH_OVERRIDE");
+    
+    // Priority 2: Configuration system (if available)
+    if (!db_path) {
+        db_path = get_config_value("database_path");
+    }
+    
+    // Priority 3: Default path
     if (!db_path) {
         db_path = DEFAULT_DATABASE_PATH;
     }
@@ -3012,15 +3019,18 @@ void print_usage(const char* program_name) {
     printf("C Nostr Relay Server\n");
     printf("\n");
     printf("Options:\n");
-    printf("  -p, --port PORT       Listen port (default: %d)\n", DEFAULT_PORT);
-    printf("  -c, --config FILE     Configuration file path\n");
-    printf("  -d, --config-dir DIR  Configuration directory path\n");
-    printf("  -h, --help            Show this help message\n");
+    printf("  -p, --port PORT          Listen port (default: %d)\n", DEFAULT_PORT);
+    printf("  -c, --config FILE        Configuration file path\n");
+    printf("  -d, --config-dir DIR     Configuration directory path\n");
+    printf("  -D, --database-path PATH Database file path (default: %s)\n", DEFAULT_DATABASE_PATH);
+    printf("  -h, --help               Show this help message\n");
     printf("\n");
     printf("Examples:\n");
     printf("  %s --config /path/to/config.json\n", program_name);
     printf("  %s --config-dir ~/.config/c-relay-dev\n", program_name);
     printf("  %s --port 9999 --config-dir /etc/c-relay\n", program_name);
+    printf("  %s --database-path /var/lib/c-relay/relay.db\n", program_name);
+    printf("  %s --database-path ./test.db --port 7777\n", program_name);
     printf("\n");
 }
 
@@ -3028,6 +3038,7 @@ int main(int argc, char* argv[]) {
     int port = DEFAULT_PORT;
     char* config_dir_override = NULL;
     char* config_file_override = NULL;
+    char* database_path_override = NULL;
     
     // Parse command line arguments
     for (int i = 1; i < argc; i++) {
@@ -3041,12 +3052,7 @@ int main(int argc, char* argv[]) {
                     log_error("Invalid port number");
                     return 1;
                 }
-                // Store port in configuration system
-                char port_str[16];
-                snprintf(port_str, sizeof(port_str), "%d", port);
-                set_database_config("relay_port", port_str, "command_line");
-                // Re-apply configuration to make sure global variables are updated
-                apply_configuration_to_globals();
+                // Port will be stored in configuration system after it's initialized
             } else {
                 log_error("Port argument requires a value");
                 return 1;
@@ -3065,6 +3071,13 @@ int main(int argc, char* argv[]) {
                 log_error("Config directory argument requires a value");
                 return 1;
             }
+        } else if (strcmp(argv[i], "-D") == 0 || strcmp(argv[i], "--database-path") == 0) {
+            if (i + 1 < argc) {
+                database_path_override = argv[++i];
+            } else {
+                log_error("Database path argument requires a value");
+                return 1;
+            }
         } else {
             log_error("Unknown argument");
             print_usage(argv[0]);
@@ -3086,12 +3099,27 @@ int main(int argc, char* argv[]) {
     
     printf(BLUE BOLD "=== C Nostr Relay Server ===" RESET "\n");
     
+    // Apply database path override BEFORE any database operations
+    if (database_path_override) {
+        log_info("Database path override specified from command line");
+        printf("  Override path: %s\n", database_path_override);
+        // Set environment variable so init_database can use the correct path
+        setenv("C_RELAY_DATABASE_PATH_OVERRIDE", database_path_override, 1);
+    }
+    
     // Initialize database FIRST (required for configuration system)
     if (init_database() != 0) {
         log_error("Failed to initialize database");
         return 1;
     }
     
+    // Store database path override in configuration if specified
+    if (database_path_override) {
+        if (set_database_config("database_path", database_path_override, "command_line") != 0) {
+            log_warning("Failed to store database path override in configuration");
+        }
+    }
+    
     // Initialize nostr library BEFORE configuration system
     // (required for Nostr event generation in config files)
     if (nostr_init() != 0) {
@@ -3108,6 +3136,17 @@ int main(int argc, char* argv[]) {
         return 1;
     }
     
+    // Apply command line overrides AFTER configuration system is initialized
+    if (port != DEFAULT_PORT) {
+        log_info("Applying port override from command line");
+        printf("  Port: %d\n", port);
+        char port_str[16];
+        snprintf(port_str, sizeof(port_str), "%d", port);
+        if (set_database_config("relay_port", port_str, "command_line") != 0) {
+            log_warning("Failed to set port override in configuration");
+        }
+    }
+    
     // Initialize NIP-11 relay information
     init_relay_info();