.validateDCO

#!/bin/bash

# This script will check to make sure each commit in PR, as specified
# by the TRAVIS_COMMIT_RANGE env var, is signed via a DCO

set -e

echo TRAVIS_COMMIT_RANGE: ${TRAVIS_COMMIT_RANGE}
if [[ "${TRAVIS_COMMIT_RANGE}" != *"..."* ]]; then
  parent=$(git log -n 1 --format="%P" ${TRAVIS_COMMIT_RANGE})
  TRAVIS_COMMIT_RANGE="${TRAVIS_COMMIT_RANGE}...$parent"
fi

echo Commits: $(git rev-list ${TRAVIS_COMMIT_RANGE})

for commit in $(git rev-list ${TRAVIS_COMMIT_RANGE}); do
  echo
  echo Looking at commit: $commit
  parents=$(git log -n 1 --format="%P" $commit)
  if [[ "$parents" == *" "* ]]; then
    echo "Skipping a merge commit"
	continue
  fi

  set +e
  git log --format="%B" -n 1 $commit | \
    grep -E '^Signed-off-by: ' # ([^<]+) <([^<>@]+@[^<>]+)>$' > /dev/null 2>&1
  if test ${PIPESTATUS[1]} -ne 0; then
    set -e
    echo "Commit msg:"
	echo "------------------------------------"
    git log --format="%B" -n 1 $commit
	echo "------------------------------------"
    echo "**** Commit $commit is missing a DCO"
    exit 1
  fi
  set -e

done
echo
echo "**** All commits are signed!"
exit 0