shithub: dav1d

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ci: Check the style of commit messages

Check all commits, not just the latest one, as a branch may consist
of multiple commits. Exclude commits from upstream master (which
may contain issues which we want to error out for on new commits).

--- a/.gitlab-ci.yml

+++ b/.gitlab-ci.yml

@@ -11,7 +11,19 @@

         - amd64

     script:

         - git grep -n -e $'\t' --or -e $'\r' -- . ':(exclude)*/compat/*' && exit 1

-        - /bin/true

+        - git remote add upstream https://code.videolan.org/videolan/dav1d.git && git fetch -q upstream master

+        - for i in $(git rev-list HEAD ^upstream/master); do

+              echo "Checking commit message of $i";

+              msg="$(git log --format=%B -n 1 $i)";

+              if [ -n "$(echo "$msg" | awk "NR==2")" ]; then

+                  echo "Malformed commit message in $i, second line must be empty";

+                  exit 1;

+              fi;

+              if echo "$msg" | head -1 | grep -q '\.$'; then

+                  echo "Malformed commit message in $i, trailing period in subject line";

+                  exit 1;

+              fi;

+          done

 build-debian:

     image: registry.videolan.org:5000/dav1d-debian-unstable:20190215130514