upload: Add a --push-only flag

This is similar to to dry-run except it will also push your
branches for you. This can be used to either create PRS manually
in github or with other code review backends that we haven't integrated
yet.

Topic: ponly
Fixes: #179

docs/upload.md

@@ -6,7 +6,7 @@ revup upload - Modify or create code reviews.
 
 `revup [--verbose] [--keep-temp]`
 : `upload [--help] [--base-branch=<br>] [--relative-branch=<br>]`
-`[--rebase] [--relative-chain] [--skip-confirm] [--dry-run]`
+`[--rebase] [--relative-chain] [--skip-confirm] [--dry-run] [--push-only]`
 `[--status] [--no-cherry-pick] [--no-update-pr-body] [--review-graph]`
 `[--trim-tags] [--create-local-branches] [--patchsets] [--auto-add-users=<o>]`
 `[--labels=<labels>] [<topics>]`
@@ -162,6 +162,10 @@ github. This means that changes are still cherry-picked if necessary, and
 the command can still fail if there are conflicts. This will also skip the
 confirmation step and only print topic info.
 
+**--push-only, -p**
+: Like --dry-run except this also pushes branches to the git remote, but
+does not issue any github queries or attempt rebase detection.
+
 **--status, -t**
 : Print out status info of pull requests for existing topics but don't attempt
 to push or update them.

revup/revup.py

@@ -258,6 +258,7 @@ async def main() -> int:
     upload_parser.add_argument("--rebase", "-r", action="store_true")
     upload_parser.add_argument("--skip-confirm", "-s", action="store_true")
     upload_parser.add_argument("--dry-run", "-d", action="store_true")
+    upload_parser.add_argument("--push-only", action="store_true")
     upload_parser.add_argument("--status", "-t", action="store_true")
     upload_parser.add_argument("--update-pr-body", action="store_true", default=True)
     upload_parser.add_argument("--create-local-branches", action="store_true")

revup/upload.py

@@ -46,7 +46,7 @@ async def main(
             branch_format=args.branch_format,
         )
 
-    if not args.dry_run:
+    if not args.dry_run and not args.push_only:
         with get_console().status("Querying github…"):
             await topics.query_github()
             # Fetch uses the oid results from the query
@@ -69,7 +69,8 @@ async def main(
         topics.print(not args.verbose)
         return 0
 
-    topics.populate_update_info(args.update_pr_body)
+    if not args.push_only:
+        topics.populate_update_info(args.update_pr_body)
     if not args.skip_confirm and topics.num_reviews_changed() > 0:
         topics.print(not args.verbose)
         if git_ctx.sh.wait_for_confirmation():
@@ -97,6 +98,10 @@ async def main(
         # Must push refs after creating them. Includes the virtual diff branch for patchsets.
         await topics.push_git_refs(git_ctx.author, args.create_local_branches)
 
+    if args.push_only:
+        topics.print(not args.verbose)
+        return 0
+
     try:
         # Must create PRs after refs are pushed, and must update PRs after creating them.
         with get_console().status("Updating github PRs…"):