GO-478 Make a task number in a commit message mandatory

.githooks/commit-msg

@@ -0,0 +1,27 @@
+#!/bin/bash
+# The script below adds the branch name automatically to
+# every one of your commit messages. The regular expression
+# below searches for linear issue key's. The issue key will
+# be extracted out of your branch name
+
+REGEX_ISSUE_ID="[a-zA-Z0-9]+-[0-9]+"
+
+# Find current branch name
+BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD)
+COMMIT_MSG_FILE=$1
+COMMIT_TEXT=$(cat "$COMMIT_MSG_FILE")
+
+if [[ -z "$BRANCH_NAME" ]]; then
+    echo "Commit message validation failed: no branch name!"; exit 1
+fi
+
+# Extract issue id from branch name
+ISSUE_ID=$(echo "$BRANCH_NAME" | grep -o -E "$REGEX_ISSUE_ID" | head -1 | awk '{print toupper($0)}')
+
+if [[ "$ISSUE_ID" != "GO-"* ]]; then
+  echo "Commit message validation failed: branch name should contain issue name!"; exit 1
+fi
+
+if [[ "$COMMIT_TEXT" != "GO-"* ]]; then
+  echo "$ISSUE_ID" "$COMMIT_TEXT" > "$COMMIT_MSG_FILE"
+fi