check all commits in the PR

Author: mark-i-m

ci/linkcheck.sh

@@ -4,7 +4,8 @@ if [ "$TRAVIS_EVENT_TYPE" = "cron" ] ; then
   echo "Doing full link check."
   FLAGS=""
 else
-  CHANGED_FILES=$(git diff-tree --no-commit-id --name-only -r HEAD | tr '\n' ' ')
+  echo "Checking files changed in commit range: $TRAVIS_COMMIT_RANGE"
+  CHANGED_FILES=$(git diff-tree --no-commit-id --name-only -r $TRAVIS_COMMIT_RANGE | tr '\n' ' ')
 
   echo "Checking only changed files: $CHANGED_FILES"
   FLAGS="-f $CHANGED_FILES"