Vendor docker hub update script

.travis.yml

@@ -31,4 +31,4 @@ jobs:
     - <<: *build
       if: branch = master AND type != pull_request
       env:
-      script: docker run -v $PWD:/workspace -e DOCKERHUB_USERNAME=$DOCKER_USERNAME -e DOCKERHUB_PASSWORD=$DOCKER_PASSWORD -e DOCKERHUB_REPOSITORY='factoriotools/factorio' -e README_FILEPATH='/workspace/README.md' peterevans/dockerhub-description:2.1.0
+      script: DOCKERHUB_USERNAME=$DOCKER_USERNAME DOCKERHUB_PASSWORD=$DOCKER_PASSWORD DOCKERHUB_REPOSITORY='factoriotools/factorio' README_FILEPATH='./README.md' ./update-dockerhub-description.sh

update-dockerhub-description.sh

@@ -0,0 +1,34 @@
+#!/bin/sh -l
+
+# This script is licensed under MIT and was originally written by Peter Evans. You can find a copy of the MIT license next to this file.
+# The original file is available on his Github repo under the following link:
+# https://github.com/peter-evans/dockerhub-description/blob/84d38211e27bb9b9effefa718f8c734db8adc5e1/entrypoint.sh
+
+set -euo pipefail
+IFS=$'\n\t'
+
+# Set the default path to README.md
+README_FILEPATH=${README_FILEPATH:="./README.md"}
+
+# Check the file size
+if [ $(wc -c <${README_FILEPATH}) -gt 25000 ]; then
+  echo "File size exceeds the maximum allowed 25000 bytes"
+  exit 1
+fi
+
+# Acquire a token for the Docker Hub API
+echo "Acquiring token"
+LOGIN_PAYLOAD="{\"username\": \"${DOCKERHUB_USERNAME}\", \"password\": \"${DOCKERHUB_PASSWORD}\"}"
+TOKEN=$(curl -s -H "Content-Type: application/json" -X POST -d ${LOGIN_PAYLOAD} https://hub.docker.com/v2/users/login/ | jq -r .token)
+
+# Send a PATCH request to update the description of the repository
+echo "Sending PATCH request"
+REPO_URL="https://hub.docker.com/v2/repositories/${DOCKERHUB_REPOSITORY}/"
+RESPONSE_CODE=$(curl -s --write-out %{response_code} --output /dev/null -H "Authorization: JWT ${TOKEN}" -X PATCH --data-urlencode full_description@${README_FILEPATH} ${REPO_URL})
+echo "Received response code: $RESPONSE_CODE"
+
+if [ $RESPONSE_CODE -eq 200 ]; then
+  exit 0
+else
+  exit 1
+fi