Resolves #249: Adding yaml parser to git-commit hook. (#256)

* Resolves #249: Adding yaml parser to git-commit hook.

* Fixing root reference.

template/scripts/git-hooks/commit-msg

@@ -5,12 +5,15 @@
 # You may adapt the message length check. Currently checking it's longer than
 # 15 characters.
 
-regex="^${project.prefix}-[0-9]+(: )[^ ].{15,}\."
+
+ROOT_DIR="$(pwd)/"
+PREFIX=$($ROOT_DIR/vendor/bin/drupal yaml:get:value $ROOT_DIR/project.yml project.prefix)
+regex="^${PREFIX}-[0-9]+(: )[^ ].{15,}\."
 if ! grep -iqE "$regex" "$1"; then
   echo "Invalid commit message. Commit messages must:"
   echo "* Contain the project prefix followed by a hyphen"
   echo "* Contain a ticket number followed by a colon and a space"
   echo "* Be at least 15 characters long and end with a period."
-  echo "Valid example: ${project.prefix}-135: Added the new picture field to the article feature."
+  echo "Valid example: $PREFIX-135: Added the new picture field to the article feature."
   exit 1;
 fi