git-revs-since-last-merge

#!/bin/sh

### this script returns a gitrevisions(7) expression that
### shows history since the last merge.

max=10
if [ $(git rev-list --count --max-count $max HEAD) -lt $max ]; then
  # if the repo has less than ten commits, return nothing
  # which means show everything
  exit 0
fi

anchor=$(git-last-merge)
if [ -n "$anchor" ]; then
  # include a little context around the merge commit
  anchor="$anchor"'^^'
else
  # if no merges, just show the last n commits
  anchor='HEAD~'"$max"
fi

echo "$anchor..HEAD"