feat: add an option to disable file watching (#387)

* feat: add an option to disable file watching

* feat: disable watchers only based on the `CI` env var

Author: tamasfe

src/index.ts

@@ -75,8 +75,7 @@ export default createUnplugin<Options | undefined>((opt = {}, _meta) => {
     },
 
     buildStart() {
-      // TODO: how do we properly check if we are in dev mode?
-      return ctx.scanPages(true)
+      return ctx.scanPages(options.watch)
     },
 
     buildEnd() {

src/options.ts

@@ -178,6 +178,15 @@ export interface ResolvedOptions {
    * @inheritDoc ParseSegmentOptions
    */
   pathParser: ParseSegmentOptions
+
+  /**
+   * Whether to watch the files for changes.
+   *
+   * Defaults to `true` unless the `CI` environment variable is set.
+   * 
+   * @default `!process.env.CI`
+   */
+  watch: boolean
 }
 
 /**
@@ -210,6 +219,7 @@ export const DEFAULT_OPTIONS: ResolvedOptions = {
   pathParser: {
     dotNesting: true,
   },
+  watch: !process.env.CI,
 }
 
 export interface ServerContext {