Make CI fail on black/pylint failure, but not change files

.travis.yml

@@ -12,15 +12,10 @@ install:
     - pip3 install -r requirements.txt
 before_script:
     - pip3 install -r ./tests/requirements_dev.txt
-    - pip3 install anybadge
-    - . ./tests/ci_git_prep.sh
-    - black hyperglass
-    - python3 ./manage.py pylint-badge --integer-only True
-    - . ./tests/ci_git_commit.sh
+    - black --check hyperglass
+    - python3 ./manage.py pylint-check --integer-only True
     - python3 ./tests/ci_prepare.py
 script:
     - nohup python3 ./tests/ci_dev_server.py &
     - sleep 20
     - python3 ./tests/ci_test.py
-after_success:
-    - . ./tests/ci_git_push.sh

manage.py

@@ -35,8 +35,7 @@ def construct_test(test_query, location, test_target):
 def hg():
     pass
 
-
-@hg.command("pylint-badge", help="Runs Pylint and generates a badge for GitHub")
+@hg.command("pylint-check", help="Runs Pylint and generates a badge for GitHub")
 @click.option(
     "-i",
     "--integer-only",
@@ -45,7 +44,8 @@ def hg():
     default=False,
     help="Output Pylint score as integer",
 )
-def pylint_badge(int_only):
+@click.option("-b", "--badge", "create_badge", type=bool, default=False, help="Create Pylint badge")
+def pylint_check(int_only, create_badge):
     try:
         import re
         import anybadge
@@ -58,6 +58,7 @@ def pylint_badge(int_only):
         ).group(1)
         if not pylint_score == "10.00":
             raise RuntimeError(f"Pylint score {pylint_score} not acceptable.")
+        if create_badge:
             badge_file = os.path.join(working_directory, "pylint.svg")
             if os.path.exists(badge_file):
                 os.remove(badge_file)