First commit.

Dockerfile

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+FROM stackexchange/dnscontrol:v0.2.8@sha256:007447bf199e74964b854b40585bd3ad1e60c6586fbb5e46c935fe9ffbaeedb3
+
+LABEL repository="https://github.com/koenrh/dnscontrol-action"
+LABEL maintainer="Koen Rouwhorst <info@koenrouwhorst.nl>"
+
+LABEL "com.github.actions.name"="DNSControl"
+LABEL "com.github.actions.description"="Deploy your DNS configuration to multiple providers."
+LABEL "com.github.actions.icon"="cloud"
+LABEL "com.github.actions.color"="yellow"
+
+RUN apk add --no-cache \
+  bash~=4 \
+  jq~=1.6
+
+COPY README.md /
+
+COPY entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]

LICENSE.txt

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+ISC License
+
+Copyright (c) 2018, Koen Rouwhorst
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

README.md

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-# dnscontrol-action
+# DNSControl Action
+
+Deploy your DNS configuration using [GitHub Actions](https://github.com/actions)
+using [DNSControl](https://github.com/StackExchange/dnscontrol/).
+
+## Supported providers
+
+Not all [providers](https://stackexchange.github.io/dnscontrol/provider-list) are
+supported yet.
+
+- [ ] Active Directory PowerShell
+- [ ] BIND
+- [x] Cloudflare
+- [x] DigitalOcean
+- [x] DNSimple
+- [ ] Gandi
+- [ ] Google Cloud DNS
+- [ ] HEXONET
+- [x] Linode
+- [ ] Name.com
+- [ ] Namecheap
+- [x] NS1
+- [ ] OVH
+- [x] Route 53
+- [ ] SoftLayer DNS
+- [ ] Vultr
+
+## Usage
+
+TODO
+
+## Secrets
+
+TODO

entrypoint.sh

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+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# NOTE: DNSControl requires a credentials file on disk. See: https://git.io/fhIb3
+echo "{}" > creds.json
+
+add_key () {
+  # shellcheck disable=SC2094
+  cat <<< "$(jq "$1 = \"$2\"" < creds.json)" > creds.json
+}
+
+if [[ -n "$CLOUDFLARE_API_USER" && -n "$CLOUDFLARE_API_KEY" ]]
+then
+  # NOTE: https://stackexchange.github.io/dnscontrol/providers/cloudflare
+  add_key ".cloudflare.apiuser" "\$CLOUDFLARE_API_USER"
+  add_key ".cloudflare.apikey" "\$CLOUDFLARE_API_KEY"
+
+elif [[ -n "$DIGITALOCEAN_OAUTH_TOKEN" ]]
+then
+  # NOTE: https://stackexchange.github.io/dnscontrol/providers/digitalocean
+  add_key ".digitalocean.token" "\$DIGITALOCEAN_OAUTH_TOKEN"
+
+elif [[ -n "$DNSIMPLE_ACCOUNT_ACCESS_TOKEN" ]]
+then
+  # NOTE: https://stackexchange.github.io/dnscontrol/providers/dnsimple
+  add_key ".dnsimple.token" "\$DNSIMPLE_ACCOUNT_ACCESS_TOKEN"
+
+elif [[ -n "$LINODE_ACCESS_TOKEN" ]]
+then
+  # NOTE: https://stackexchange.github.io/dnscontrol/providers/linode
+  add_key ".linode.token" "\$LINODE_ACCESS_TOKEN"
+
+elif [[ -n "$NSONE_API_KEY" ]]
+then
+  # NOTE: https://stackexchange.github.io/dnscontrol/providers/ns1
+  add_key ".ns1.api_token" "\$NSONE_API_KEY"
+
+elif [[ -n "$AWS_ACCESS_KEY_ID" && -n "$AWS_SECRET_ACCESS_KEY" ]]
+then
+  # NOTE: https://stackexchange.github.io/dnscontrol/providers/route53
+  add_key ".r53.KeyId" "\$AWS_ACCESS_KEY_ID"
+  add_key ".r53.SecretKey" "\$AWS_SECRET_ACCESS_KEY"
+
+  if [[ -n "$AWS_SESSION_TOKEN" ]]
+  then
+    add_key ".r53.Token" "\$AWS_SESSION_TOKEN"
+  fi
+fi
+
+sh -c "dnscontrol $*"