Revert gulpfile changes (moved to PR #22292)

The ENOENT race condition fix for the docs gulp build belongs in
PR #22292 (fix/docs-gulp-race-condition), not in this PR.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gnodet

docs/gulpfile.js

@@ -206,8 +206,7 @@ const sources = {
         '../core/camel-base/src/main/docs/!(*-component|*-language|*-dataformat|*-summary).adoc',
         '../core/camel-main/src/main/docs/!(*-component|*-language|*-dataformat|*-summary).adoc',
         '../components/{*,*/*}/src/main/docs/!(*-component|*-language|*-dataformat|*-summary).adoc',
-        '../dsl/src/main/docs/!(*-component|*-language|*-dataformat|*-summary).adoc',
-        '../dsl/{*,*/*}/src/main/docs/!(*-component|*-language|*-dataformat|*-summary).adoc',
+        '../dsl/**/src/main/docs/!(*-component|*-language|*-dataformat|*-summary).adoc',
       ],
       destination: 'components/modules/others/pages',
       keep: [
@@ -315,37 +314,6 @@ const tasks = Array.from(sourcesMap).flatMap(([type, definition]) => {
     })
   }
 
-  // Wraps gulp.src to gracefully handle ENOENT from ephemeral directories
-  // (e.g. .camel-jbang/work created/deleted by tests running in parallel).
-  // We pipe through a passthrough transform so that on ENOENT we can
-  // cleanly end() the passthrough, which properly signals downstream
-  // pipes to finish. Direct error handling on gulp.src() doesn't work
-  // because Node.js .pipe() does not propagate errors or end signals.
-  const ignorePatterns = ['**/target/**', '**/.camel-jbang/**']
-  const resilientSrc = (source, options) => {
-    const src = gulp.src(source, options)
-    const passthrough = through2.obj(function (file, enc, done) {
-      done(null, file)
-    })
-    src.on('error', function (err) {
-      if (err.code === 'ENOENT') {
-        // Don't end passthrough — the source may continue with remaining files.
-        // If it stops, the 'close' handler below will clean up.
-        console.error(`⚠️ ENOENT (skipped): ${err.path || err.message}`)
-      } else {
-        passthrough.destroy(err)
-      }
-    })
-    // If the source closes without emitting 'end' (e.g. after an error),
-    // ensure the passthrough ends so downstream tasks don't hang.
-    src.on('close', function () {
-      if (!passthrough.writableEnded) {
-        passthrough.end()
-      }
-    })
-    return src.pipe(passthrough)
-  }
-
   // creates symlinks from source to destination that satisfy the
   // given filter removing the basedir from a path, i.e. symlinking
   // from a flat hiearchy
@@ -358,12 +326,10 @@ const tasks = Array.from(sourcesMap).flatMap(([type, definition]) => {
       }
     })
 
-    let fileCount = 0
-    return resilientSrc(source, { ignore: ignorePatterns, allowEmpty: true })
+    return gulp.src(source, { ignore: ['**/target/**'] })
       .pipe(filterFn)
       .pipe(
         map((file, done) => {
-          fileCount++
           // this flattens the output to just .../pages/.../file.ext
           // instead of .../pages/camel-.../src/main/docs/.../file.ext
           file.base = path.dirname(file.path)
@@ -373,9 +339,6 @@ const tasks = Array.from(sourcesMap).flatMap(([type, definition]) => {
       .pipe(gulp.symlink(destination, {
         relativeSymlinks: true,
       }))
-      .on('end', () => {
-        console.log(`  → symlinked ${fileCount} files to ${destination}`)
-      })
   }
 
   // generates sorted & grouped nav.adoc file from a set of .adoc
@@ -446,7 +409,7 @@ const tasks = Array.from(sourcesMap).flatMap(([type, definition]) => {
       return done()
     }
 
-    return resilientSrc(source, { ignore: ignorePatterns, allowEmpty: true }) // asciidoc files
+    return gulp.src(source, { ignore: ['**/target/**'] }) // asciidoc files
       .pipe(through2.obj(extractExamples)) // extracted example files
       // symlink links from a fixed directory, i.e. we could link to
       // the example files from `destination`, that would not work for