Fix affected projects for multiple changed files

Author: smola

gradle/ci_jobs.gradle

@@ -123,6 +123,7 @@ if (rootProject.hasProperty("gitBaseRef")) {
 
     // Get all projects, sorted by descending path length.
     final projects = subprojects.sort { a, b -> b.projectDir.path.length() <=> a.projectDir.path.length() }
+    Map<Project, Set<String>> _affectedProjects = [:]
     for (File f in rootProject.changedFiles) {
       Project p = projects.find { f.toString().startsWith(it.projectDir.path + "/") }
       if (p == null) {
@@ -132,7 +133,6 @@ if (rootProject.hasProperty("gitBaseRef")) {
       }
       final relPath = Paths.get(p.projectDir.path).relativize(f.toPath())
       final pathComponents = relPath.collect({ it.toString() }).toList()
-      Map<Project, Set<String>> _affectedProjects = [:]
       if (pathComponents.size() < 3) {
         logger.warn("Changed file: ${relativeToGitRoot(f)} in project ${p.path} (all)")
         _affectedProjects.computeIfAbsent(p, { new HashSet<String>() }).add("all")
@@ -149,9 +149,9 @@ if (rootProject.hasProperty("gitBaseRef")) {
         logger.warn("Changed file: ${relativeToGitRoot(f)} in project ${p.path} (all)")
         _affectedProjects.computeIfAbsent(p, { new HashSet<String>() }).add("all")
       }
-      rootProject.ext {
-        it.affectedProjects = _affectedProjects
-      }
+    }
+    rootProject.ext {
+      it.affectedProjects = _affectedProjects
     }
   }