Add conditional mark sort check to pre-commit hook (#8162)

What is the motivation for this PR?
In conditional mark, testcases should be sorted from A to Z, and there is no support to check it in PR test.

How did you do it?
Add a pre-commit hook under sonic-mgmt repo to check conditional mark sort, if testcases are not sorted, pre-commit will fail, need to fix it before PR get merged.

.hooks/pre_commit_hooks/check_conditional_mark_sort.py

@@ -0,0 +1,28 @@
+import re
+import sys
+
+
+def main():
+    stage_files = sys.argv[1:]
+    retval = 0
+    for stage_file in stage_files:
+        if "tests_mark_conditions" in stage_file:
+            conditions = []
+            with open(stage_file, 'r') as f:
+                file_contents = f.readlines()
+                if not file_contents:
+                    continue
+                for line in file_contents:
+                    if re.match('^[a-zA-Z]', line):
+                        conditions.append(line.strip().rstrip(":"))
+                sorted_conditions = conditions[:]
+                sorted_conditions.sort()
+                if conditions != sorted_conditions:
+                    print("The entries in tests/common/plugins/conditional_mark/tests_mark_conditions*.yaml "
+                          "are not sorted in alphabetic order.")
+                    retval = 1
+    return retval
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

.pre-commit-config.yaml

@@ -15,3 +15,8 @@ repos:
     hooks:
     -   id: flake8
         args: ["--max-line-length=120"]
+
+-   repo: https://github.com/sonic-net/sonic-mgmt
+    rev: 1.0.0+pre_commit
+    hooks:
+    -   id: check-conditional-mark-sort

.pre-commit-hooks.yaml

@@ -0,0 +1,6 @@
+-   id: check-conditional-mark-sort
+    name: check conditional mark sort
+    description: check conditional mark yaml file sort from A to Z.
+    entry: check-conditional-mark-sort
+    language: python
+    types: [yaml]

pyproject.toml

@@ -0,0 +1,32 @@
+# Local pre-commit hook config
+[project]
+name = "sonic-mgmt-pre-commit-hooks"
+version = "1.0.0+pre_commit"
+description = "Some hooks for pre-commit in sonic-mgmt repo."
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+]
+requires-python = ">=3.7"
+dependencies = ["tomli>=2.0.1;python_version<'4.0'"]
+
+[project.urls]
+Homepage = "https://github.com/sonic-net/sonic-mgmt"
+
+[tool.setuptools]
+package-dir = {"" = ".hooks"}
+
+[tool.setuptools.packages.find]
+where = [".hooks"]
+
+[project.scripts]
+check-conditional-mark-sort = 'pre_commit_hooks.check_conditional_mark_sort:main'
+
+[tool.black]
+exclude = '''
+/(
+    spytest/
+)/
+'''