in app-maven-plugin/src/main/java/com/google/cloud/tools/maven/deploy/ConfigProcessor.java [48:55]
public String processProjectId(String projectId) {
if (projectId == null || projectId.trim().isEmpty() || projectId.equals(APPENGINE_CONFIG)) {
throw new IllegalArgumentException(PROJECT_ERROR);
} else if (projectId.equals(GCLOUD_CONFIG)) {
return configReader.getProjectId();
}
return projectId;
}