130 lines
4.4 KiB
Markdown
130 lines
4.4 KiB
Markdown
# telegram-group2mastodon
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telegram-group2mastodon is a Telegram bot to post messages from a Telegram
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group to Mastodon. It's written in Go and it is relased under the AGPL3+.
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Since the bot must be able to read all the messages you should use it only on
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public groups.
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## Installation
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1. Build the bot (for example if version is v0.1.0 and you are on a unix system):
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```
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cd /tmp; GOPATH=/tmp/go go install noa.mornie.org/eriol/telegram-group2mastodon@v0.1.0
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```
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You will find the binary at `/tmp/go/bin/telegram-group2mastodon`. You don't
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need to set `GOPATH` if you already have it set and you are fine having the
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bot installed there.
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2. Create your bot using Telegram @BotFather.
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3. The bot uses environment variables as configuration, you have to export
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the following (except variables with a default) before starting it:
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| Variable | Meaning | Default |
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|--------------------------------|------------------------------|----------|
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| `MASTODON_ACCESS_TOKEN` | Mastodon access token | *N/A* |
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| `MASTODON_SERVER_ADDRESS` | Mastodon server address | *N/A* |
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| `MASTODON_TOOT_FOOTER ` | Footer of each toot | "" |
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| `MASTODON_TOOT_MAX_CHARACTERS` | Toot max lenght | 500 |
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| `MASTODON_TOOT_VISIBILITY` | Default toot visibility | unlisted |
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| `TELEGRAM_BOT_TOKEN` | Telegram bot token | *N/A* |
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| `TELEGRAM_CHAT_ID` | Telegram alolowed chat id | *N/A* |
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| `TELEGRAM_DEBUG` | Debug messages from Telegram | False |
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`MASTODON_TOOT_VISIBILITY` allowed values are: `direct`, `private`, `public`
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and `unlisted`.
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`MASTODON_TOOT_FOOTER` default is an empty string that disable the footer
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feature, no character are automatically added so you may want to add a space
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before your footer (or a new line).
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To get `MASTODON_ACCESS_TOKEN` see next point.
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4. To get `MASTODON_ACCESS_TOKEN` use the subcommand `authenticate`:
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```
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telegram-group2mastodon authenticate <https://your.instance>
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```
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and follow the istructions.
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5. Ensure that the telegram bot can access all the messages disabling privacy
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mode: https://core.telegram.org/bots/features#privacy-mode
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6. Launch the bot:
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```
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telegram-group2mastodon run
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```
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## Deploy using Docker/Podman
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Images are automatically built after each push on quay.io, here the list of
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available tags: https://quay.io/repository/eriol/telegram-group2mastodon?tab=tags
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### docker
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*Suppose you want to use the latest tag.*
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```
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docker run \
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--env MASTODON_ACCESS_TOKEN=$MASTODON_ACCESS_TOKEN \
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--env MASTODON_SERVER_ADDRESS=$MASTODON_SERVER_ADDRESS \
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--env TELEGRAM_BOT_TOKEN=$TELEGRAM_BOT_TOKEN \
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--env TELEGRAM_CHAT_ID=$TELEGRAM_CHAT_ID \
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quay.io/eriol/telegram-group2mastodon:latest
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```
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### podman
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*Suppose you want to use the latest tag.*
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```
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podman run \
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--env MASTODON_ACCESS_TOKEN=$MASTODON_ACCESS_TOKEN \
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--env MASTODON_SERVER_ADDRESS=$MASTODON_SERVER_ADDRESS \
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--env TELEGRAM_BOT_TOKEN=$TELEGRAM_BOT_TOKEN \
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--env TELEGRAM_CHAT_ID=$TELEGRAM_CHAT_ID \
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quay.io/eriol/telegram-group2mastodon:latest
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```
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### docker-compose
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```
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---
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version: "3.9"
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services:
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bot:
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image: quay.io/eriol/telegram-group2mastodon:latest
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environment:
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- MASTODON_ACCESS_TOKEN=${MASTODON_ACCESS_TOKEN}
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- MASTODON_SERVER_ADDRESS=${MASTODON_SERVER_ADDRESS}
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- TELEGRAM_BOT_TOKEN=${TELEGRAM_BOT_TOKEN}
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- TELEGRAM_CHAT_ID=${TELEGRAM_CHAT_ID}
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```
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## Deploy on metal
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You have to build the bot and use a init system of your choice to handle it.
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### systemd
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Suppose you put the bot in `/srv/tg2m/telegram-group2mastodon` an example unit
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file using an user `tg2mbot` could be:
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```
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[Unit]
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Description=a Telegram bot to post messages from a Telegram group to Mastodon
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After=network-online.target
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Wants=network-online.target
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[Service]
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ExecStart=/srv/tg2m/telegram-group2mastodon run
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User=tg2mbot
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Group=tg2mbot
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Restart=on-failure
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Environment=MASTODON_ACCESS_TOKEN=<MASTODON_ACCESS_TOKEN>
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Environment=MASTODON_SERVER_ADDRESS=<MASTODON_SERVER_ADDRESS>
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Environment=TELEGRAM_BOT_TOKEN=<TELEGRAM_BOT_TOKEN>
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Environment=TELEGRAM_CHAT_ID=<TELEGRAM_CHAT_ID>
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[Install]
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WantedBy=multi-user.target
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```
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where you have to put the real values for `<MASTODON_ACCESS_TOKEN>`,
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`<MASTODON_SERVER_ADDRESS>`, `<TELEGRAM_BOT_TOKEN>` and `<TELEGRAM_CHAT_ID>`.
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