Merge pull request #56 from camptocamp/less-error

No error on removing unexisting tag

ci/clean-dockerhub-tag

@@ -3,27 +3,36 @@
 
 import json
 import os
-import re
-import subprocess
 import sys
 
 import requests
 
 
-def clean(tag_=lambda tag: tag):
+def clean():
     token = requests.post(
         "https://hub.docker.com/v2/users/login/",
         headers={"Content-Type": "application/json"},
-        data=json.dumps(
-            {"username": os.environ["USERNAME"], "password": os.environ["PASSWORD"]}
-        ),
+        data=json.dumps({"username": os.environ["USERNAME"], "password": os.environ["PASSWORD"]}),
     ).json()["token"]
 
     with open(os.environ["GITHUB_EVENT_PATH"]) as event_file:
-        ref = json.loads(event_file.read())["ref"]
+        ref = json.loads(event_file.read())["ref"].replace("/", "_")
+
+    print("Delete image 'camptocamp/mapserver:{}'.".format(ref))
+
+    response = requests.head(
+        "https://hub.docker.com/v2/repositories/camptocamp/mapserver/tags/{tag}/".format(tag=ref),
+        headers={"Authorization": "JWT " + token},
+    )
+    if response.status_code == 404:
+        return
+    if not response.ok:
+        print("Error checking image 'camptocamp/mapserver:{}' status.".format(ref))
+        print(response.text)
+        sys.exit(2)
 
     response = requests.delete(
-        "https://hub.docker.com/v2/repositories/camptocamp/mapserver/tags/{tag}/".format(tag=ref,),
+        "https://hub.docker.com/v2/repositories/camptocamp/mapserver/tags/{tag}/".format(tag=ref),
         headers={"Authorization": "JWT " + token,},
     )
     if not response.ok: