Add a pre-commit hook to rebuild travis config

Author: Hugo Osvaldo Barrera

.pre-commit-config.yaml

@@ -14,3 +14,12 @@ repos:
     hooks:
       - id: flake8
         additional_dependencies: [flake8-import-order, flake8-bugbear]
+  - repo: local
+    hooks:
+      - id: update-travis
+        name: Update travis job definition
+        description: Ensures that travis job definition are up to date.
+        entry: scripts/make_travisconf.py
+        files: '.*travis.*'
+        stages: [commit]
+        language: script

Makefile

@@ -96,10 +96,6 @@ style:
 	! git grep -i syncroniz */*
 	! git grep -i 'text/icalendar' */*
 	sphinx-build -W -b html ./docs/ ./docs/_build/html/
-	python3 scripts/make_travisconf.py | diff -b .travis.yml -
-
-travis-conf:
-	python3 scripts/make_travisconf.py > .travis.yml
 
 install-docs:
 	pip install -Ur docs-requirements.txt

scripts/make_travisconf.py

@@ -1,6 +1,7 @@
+#!/usr/bin/env python
+
 import itertools
 import json
-import sys
 
 python_versions = ("3.5", "3.6")
 latest_python = "3.6"
@@ -57,10 +58,8 @@
         job = {
             'python': python,
             'env': ("BUILD=test-storage "
-                    "DAV_SERVER={dav_server} "
-                    "REQUIREMENTS={requirements} "
-                    .format(dav_server=dav_server,
-                            requirements=requirements))
+                    f"DAV_SERVER={dav_server} "
+                    f"REQUIREMENTS={requirements} ")
         }
 
         build_prs = dav_server not in ("fastmail", "davical", "icloud")
@@ -82,4 +81,5 @@
 #     'env': 'BUILD=test'
 # })
 
-json.dump(cfg, sys.stdout, sort_keys=True, indent=2)
+with open('.travis.yml', 'w') as output:
+    json.dump(cfg, output, sort_keys=True, indent=2)