set `dry_run` to `true` in `Config` if passed as command line flag

src/main.rs

@@ -376,12 +376,12 @@ fn setup_logger() {
     builder.init();
 }
 
-async fn load_config_file(config: Config) -> Result<Config, AnyError> {
+async fn load_config_file(opt: Config) -> Result<Config, AnyError> {
-    match config.config_file.as_ref() {
+    match opt.config_file.as_ref() {
         Some(path) => {
             debug!(?path, "loading config file");
             let toml = tokio::fs::read_to_string(&path).await?;
-            let config: Config = match toml::from_str(&toml) {
+            let mut config: Config = match toml::from_str(&toml) {
                 Ok(c) => c,
                 Err(e) => panic!(
                     "\nfatal error: parsing config file at {} failed:\n\n{}\n\n",
@@ -389,10 +389,11 @@ async fn load_config_file(config: Config) -> Result<Config, AnyError> {
                     e
                 ),
             };
+            config.dry_run |= opt.dry_run;
             Ok(config)
         }
 
-        None => Ok(config),
+        None => Ok(opt),
     }
 }