misc: add check_commit_msg.sh script

Type: feature
Change-Id: I5e04991afd7500673db121e4529275e9aff15e65
Signed-off-by: Damjan Marion <damarion@cisco.com>

extras/scripts/check_commit_msg.sh

@@ -0,0 +1,50 @@
+#/bin/env bash
+
+KNOWN_FEATURES=$(cat MAINTAINERS | sed -ne 's/^I:[[:space:]]*//p')
+FEATURES=$(git show -s --format=%s --no-color | sed -e 's/\(.*\):.*/\1/')
+KNOWN_TYPES="fix refactor style docs test make"
+TYPE=$(git show -s --format=%b --no-color | sed -ne 's/^Type:[[:space:]]*//p')
+ERR="=============================== ERROR ==============================="
+
+# Chech that subject line contains at least one feature id
+if [ $(echo ${FEATURES} | wc -w) -eq 0 ]; then
+  echo $ERR
+  echo "git commit 'Subject:' line must contain at least one known feature id."
+  echo "feature id(s) must be listed before ':' and space delimited "
+  echo "if more then one is listed."
+  echo "Please reffer to MAINTAINERS file (I: lines) for known feature ids."
+  echo $ERR
+  exit 1
+fi
+
+# Check that feature ids in subject line are known
+for i in ${FEATURES}; do
+  is_known=false
+  for j in ${KNOWN_FEATURES}; do
+    [ "${i}" = "${j}" ] && is_known=true
+  done
+  if [ ${is_known} = "false" ] ; then
+    echo $ERR
+    echo "Unknown feature '${i}' in commit 'Subject:' line."
+    echo "Feature must exist in MAINTAINERS file. If this commit intruduces "
+    echo "new feature, then this commit must add new entry into the "
+    echo "MAINTAINERS file."
+    echo $ERR
+    exit 1
+  fi
+done
+
+# Check that Message body contains valid Type: entry
+is_known=false
+for i in ${KNOWN_TYPES}; do
+  [ "${i}" = "${TYPE}" ] && is_known=true
+done
+if [ ${is_known} = "false" ] ; then
+  echo $ERR
+  echo "Unknown commit type '${TYPE}' in commit message body."
+  echo "Commit message must contain known 'Type:' entry."
+  echo "Known types are: ${KNOWN_TYPES}"
+  echo $ERR
+  exit 1
+fi
+