Git hooks pre-receive checks trailers

pre-receive.sh

#!/bin/bash

echo "Checking commit messages..."
# Iterate over the pushed commits
while read old_rev new_rev refname; do
  # Get the list of commits being pushed
  commits=$(git rev-list --reverse $old_rev..$new_rev)

  # Iterate over the commits
  for commit in $commits; do
    # Check for the "Reviewed-by" and "Signed-off-by" trailers in the commit message
    if ! git log -1 --format=%B $commit | grep -q 'Reviewed-by:' && ! git log -1 --format=%B $commit | grep -q 'Signed-off-by:'; then
      # If either trailer is not present, print an error message and exit with a non-zero exit code
      echo "Error: Commit $commit is missing the 'Reviewed-by:' and 'Signed-off-by:' trailers."
      exit 1
    fi
  done
done