Add preserve stop times flag to avoid normalizing stop_sequence

src/main/java/com/conveyal/datatools/common/status/MonitorableJob.java

@@ -176,12 +176,13 @@ public void run () {
                 // because the error presumably already occurred and has a better error message.
                 cancel(cancelMessage);
             }
-            // Run final steps of job pending completion or error. Note: any tasks that depend on job success should
-            // check job status to determine if final step should be executed (e.g., storing feed version in MongoDB).
-            // TODO: should we add separate hooks depending on state of job/sub-tasks (e.g., success, catch, finally)
             // Complete the job (as success if no errors encountered, as failure otherwise).
             if (!parentJobErrored && !subTaskErrored) status.completeSuccessfully("Job complete!");
             else status.complete(true);
+            // Run final steps of job pending completion or error. Note: any tasks that depend on job success should
+            // check job status in jobFinished to determine if final step should be executed (e.g., storing feed
+            // version in MongoDB).
+            // TODO: should we add separate hooks depending on state of job/sub-tasks (e.g., success, catch, finally)
             jobFinished();
 
             // We retain finished or errored jobs on the server until they are fetched via the API, which implies they

src/main/java/com/conveyal/datatools/editor/jobs/CreateSnapshotJob.java

@@ -87,7 +87,7 @@ public void jobLogic() {
         Collection<Snapshot> existingSnapshots = feedSource.retrieveSnapshots();
         int version = existingSnapshots.size();
         status.update("Creating snapshot...", 20);
-        FeedLoadResult loadResult = makeSnapshot(namespace, DataManager.GTFS_DATA_SOURCE);
+        FeedLoadResult loadResult = makeSnapshot(namespace, DataManager.GTFS_DATA_SOURCE, !feedSource.preserveStopTimesSequence);
         snapshot.version = version;
         snapshot.namespace = loadResult.uniqueIdentifier;
         snapshot.feedLoadResult = loadResult;

src/main/java/com/conveyal/datatools/editor/jobs/ExportSnapshotToGTFSJob.java

@@ -21,6 +21,7 @@ public class ExportSnapshotToGTFSJob extends MonitorableJob {
     private static final Logger LOG = LoggerFactory.getLogger(ExportSnapshotToGTFSJob.class);
     private final Snapshot snapshot;
     private final String feedVersionId;
+    private File tempFile;
 
     public ExportSnapshotToGTFSJob(Auth0UserProfile owner, Snapshot snapshot, String feedVersionId) {
         super(owner, "Exporting snapshot " + snapshot.name, JobType.EXPORT_SNAPSHOT_TO_GTFS);
@@ -40,7 +41,6 @@ public Snapshot getSnapshot () {
 
     @Override
     public void jobLogic() {
-        File tempFile;
         try {
             tempFile = File.createTempFile("snapshot", "zip");
         } catch (IOException e) {
@@ -52,6 +52,7 @@ public void jobLogic() {
         FeedLoadResult result = exporter.exportTables();
         if (result.fatalException != null) {
             status.fail(String.format("Error (%s) encountered while exporting database tables.", result.fatalException));
+            return;
         }
 
         // Override snapshot ID if exporting feed for use as new feed version.
@@ -71,12 +72,15 @@ public void jobLogic() {
                 status.fail(String.format("Could not store feed for snapshot %s", snapshot.id), e);
             }
         }
-        // Delete snapshot temp file.
-        tempFile.delete();
     }
 
     @Override
     public void jobFinished () {
         if (!status.error) status.completeSuccessfully("Export complete!");
+        // Delete snapshot temp file.
+        if (tempFile != null) {
+            LOG.info("Deleting temporary GTFS file for exported snapshot at {}", tempFile.getAbsolutePath());
+            tempFile.delete();
+        }
     }
 }

src/main/java/com/conveyal/datatools/manager/models/FeedSource.java

@@ -47,9 +47,18 @@ public class FeedSource extends Model implements Cloneable {
     /**
      * The collection of which this feed is a part
      */
-    //@JsonView(JsonViews.DataDump.class)
     public String projectId;
 
+    /**
+     * When snapshotting a GTFS feed for editing, gtfs-lib currently defaults to normalize stop sequence values to be
+     * zero-based and incrementing. This can muck with GTFS files that are linked to GTFS-rt feeds by stop_sequence, so
+     * this override flag currently provides a workaround for feeds that need to be edited but do not need to edit
+     * stop_times or individual patterns. WARNING: enabling this flag for a feed and then attempting to edit patterns in
+     * complicated ways (e.g., modifying the order of pattern stops) could have unexpected consequences. There is no UI
+     * setting for this and it is not recommended to do this unless absolutely necessary.
+     */
+    public boolean preserveStopTimesSequence;
+
     /**
      * Get the Project of which this feed is a part
      */