Add prepare-commit-msg hook

intis-hooks/prepare-commit-msg

@@ -0,0 +1,40 @@
+#!/usr/bin/python3
+
+# put this in .git/hooks and ensure it has exec permissions: "chmod +x prepare-commit-msg"
+# use the following steps to use it globally
+# - create ~/.git-templates
+# - run the command: "git config --global init.templateDir '~/.git-templates'"
+# - reinitialize existing git repos you wish to use this in: "git init"
+
+import re, subprocess, sys
+
+JIRA_ISSUE_URL = "https://smartvending.atlassian.net/browse/"
+PREPEND_TICKET = True
+APPEND_ISSUE_LINK = True
+
+commit_file = sys.argv[1]
+regex = re.compile("^([A-Z]+-[0-9]+)", re.IGNORECASE)
+
+git_branch_name = subprocess.run(
+    ["git", "rev-parse", "--abbrev-ref", "HEAD"],
+    stdout=subprocess.PIPE,
+    encoding="utf-8",
+)
+
+match = regex.match(git_branch_name.stdout)
+
+if match:
+    ticket = match.group()
+    ticket_url = f"{JIRA_ISSUE_URL}{ticket}"
+
+    with open(commit_file, "r+") as f:
+        contents = f.read().strip()
+
+        if PREPEND_TICKET and not contents.startswith(ticket):
+            contents = f"{ticket}: {contents}"
+
+        if APPEND_ISSUE_LINK:
+            contents = f"{contents}\n\n{ticket_url}"
+
+        f.seek(0)
+        f.write(contents)