From 70e8905ac767da24fb89213c08fdc309e7e263c9 Mon Sep 17 00:00:00 2001
From: Jamie MacDonald <j.macdonald@rasa.com>
Date: Wed, 20 Dec 2023 11:52:47 +0000
Subject: [PATCH] Add branch parsing script

---
 scripts/get_tags_from_branch.py | 39 +++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 scripts/get_tags_from_branch.py

diff --git a/scripts/get_tags_from_branch.py b/scripts/get_tags_from_branch.py
new file mode 100644
index 000000000..3c3651e97
--- /dev/null
+++ b/scripts/get_tags_from_branch.py
@@ -0,0 +1,39 @@
+import ast
+import os
+import subprocess
+import sys
+
+def get_tags_from_branches(branches):
+    tags = []
+
+    for branch in branches:
+        # Strip ".x" suffix from branch name.
+        branch_name = branch.rstrip('.x')
+
+        # Try to fetch all git tags for the given branch.
+        # `output` will be sorted in the descending order.
+        try:
+            output = subprocess.check_output(
+                f'git tag | sort -r -V | grep -E "^{branch_name}.[0-9]+$"',
+                shell=True,
+                universal_newlines=True
+            )
+        except subprocess.CalledProcessError:
+            print(f'Failed to retrieve tags for `{branch_name}` branch.')
+            continue
+
+        branch_tags = output.strip().split('\n')
+        tags.extend(branch_tags)
+
+    return tags
+
+input_branches = sys.argv[1]
+
+# Convert stringified list to a Python list.
+branches = ast.literal_eval(input_branches)
+tags = get_tags_from_branches(branches)
+
+print(f'{tags}')
+
+with open(os.environ['GITHUB_OUTPUT'], 'a') as github_output_file:
+    print(f'tags={tags}', file=github_output_file)
\ No newline at end of file