Mastodon bot

mastodon-bot/Dockerfile

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+FROM alpine
+LABEL \
+	maintainer="Davide Alberani <da@erlug.linux.it>"
+
+RUN \
+	apk add --no-cache \
+		git python3 && \
+	pip3 install Mastodon.py && \
+	pip3 install markovify && \
+	cd / && \
+	git clone https://github.com/alberanid/onthisday.git && \
+	cd onthisday && \
+	python3 ./setup.py install
+
+COPY onthisday-mastodon-bot.py /usr/bin/
+
+ENTRYPOINT ["python3", "/usr/bin/onthisday-mastodon-bot.py"]
+
+

mastodon-bot/onthisday-mastodon-bot.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import os
+import sys
+import subprocess
+from mastodon import Mastodon
+
+API_URL = 'https://botsin.space/'
+
+sys.stdout = open(sys.stdout.fileno(), mode='w', encoding='utf8', buffering=1)
+
+def getEvents():
+    cmd = ['python3', '-m', 'onthisday']
+    if len(sys.argv) > 1:
+        cmd += sys.argv[1:]
+    process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    stdout, stderr = process.communicate()
+    try:
+        stdout = stdout.strip()
+        stdout = stdout.decode('utf8')
+    except:
+        return 'uh-oh: something was wrong with the encoding of the events; try again'
+    if process.returncode != 0:
+        return 'something terrible is happening: exit code: %s, stderr: %s' % (
+                process.returncode, stderr.decode('utf8'))
+    if not stdout:
+        return 'sadness: the list of events is empty; try again'
+    return stdout
+
+
+def serve(token):
+    events = getEvents()
+    print('On this day:\n\n%s' % events)
+    mastodon = Mastodon(access_token=token, api_base_url=API_URL)
+    mastodon.status_post(events)
+
+
+if __name__ == '__main__':
+    if 'EVENTS_TOKEN' not in os.environ:
+        print("Please specify the Mastodon token in the EVENTS_TOKEN environment variable")
+        sys.exit(1)
+    serve(token=os.environ['EVENTS_TOKEN'])