Add image

Dockerfile

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+FROM peterevans/curl-jq:1.0.0
+
+LABEL \
+  maintainer="Peter Evans <mail@peterevans.dev>" \
+  repository="https://github.com/peter-evans/dockerhub-description" \
+  homepage="https://github.com/peter-evans/dockerhub-description"
+
+LABEL \
+  com.github.actions.name="Docker Hub Description" \
+  com.github.actions.description="An action to update a Docker Hub repository description from README.md" \
+  com.github.actions.icon="upload" \
+  com.github.actions.color="blue"
+
+COPY LICENSE README.md
+
+COPY entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

entrypoint.sh

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+#!/bin/sh -l
+set -euo pipefail
+IFS=$'\n\t'
+
+# Set the default path to README.md
+README_FILEPATH=${README_FILEPATH:="./README.md"}
+
+# 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_USERNAME}/${DOCKERHUB_REPOSITORY}/"
+RESPONSE_CODE=$(curl -s --write-out %{response_code} --silent --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