main.rs: refactor filter regex handling

Author: cknitt

rewatch/src/main.rs

@@ -31,10 +31,7 @@ fn main() -> Result<()> {
         cli::Command::Build(build_args) => {
             let _lock = get_lock(&build_args.folder);
 
-            let filter = build_args
-                .filter
-                .as_ref()
-                .map(|filter| Regex::new(&filter).expect("Could not parse regex"));
+            let filter = parse_filter_regex(&build_args.filter);
 
             match build::build(
                 &filter,
@@ -60,10 +57,7 @@ fn main() -> Result<()> {
         cli::Command::Watch(watch_args) => {
             let _lock = get_lock(&watch_args.folder);
 
-            let filter = watch_args
-                .filter
-                .as_ref()
-                .map(|filter| Regex::new(&filter).expect("Could not parse regex"));
+            let filter = parse_filter_regex(&watch_args.filter);
             watcher::start(
                 &filter,
                 show_progress,
@@ -107,6 +101,12 @@ fn main() -> Result<()> {
     }
 }
 
+fn parse_filter_regex(filter: &Option<String>) -> Option<Regex> {
+    filter
+        .as_ref()
+        .map(|filter| Regex::new(&filter).expect("Could not parse filter regex"))
+}
+
 fn get_lock(folder: &str) -> lock::Lock {
     match lock::get(folder) {
         lock::Lock::Error(error) => {