Scenario: pull-ahead

Only upstream changed since the clone.

• Monorepo (vendor/a/): cloned at seed, no local changes since.
• Upstream: seed, then a commit, already fetched.

Output

setup.bash builds this state:

$ build_scenario scenario_pull_ahead

$ git splice status
On branch main

  behind 1  vendor/a

$ git splice log
===  vendor/a (main)
> 6045a98 upstream change  (Test <test@example.com>)

merge splices the change in as one ordinary commit, which also records the new synced commit in vendor/a/.splice:

$ git splice merge vendor/a
ok   vendor/a: merged 6045a98

The monorepo's history stays linear, and upstream's commits never become part of it:

$ git log --format=%s
splice: merge vendor/a from main at 6045a98
add vendor/a
initial commit

$ git splice status
On branch main

  up to date  vendor/a