This is a very simple application, a proof of concept as working code written in Golang, that access Twitter API to send an answer in the name of the account owner for those tweets that matches the query pattern.

See it on Twitter.

The Docker image is hosted at Docker Hub and it is build and pushed through GitHub Actions.

$ docker build -t twitter-echo-bot .

$ docker run -p 8080:8080 \
    -e CONSUMER_API_KEY="key" \
    -e CONSUMER_API_SECRET="secret" \
    -e ACCESS_TOKEN="token" \
    -e ACCESS_TOKEN_SECRET="token_secret" \
    -e SEARCH_QUERY="#ariel17echobot" \
    -e GREET_TEXT="Hellou!" \
    -e RESPONSE_TEXT="bip bop bip!" \
    -e JOB_SECONDS=10 \
    twitter-echo-bot

Using an .env is preferred, also the deployment process uses it to provide the required settings to the application instead of setting raw environment variables. Watch out to not track it!

$ docker run --env-file=.env twitter-echo-bot

This project includes a Makefile to avoid writting all those commands by hand and go directly to the point with the same results:

$ make build  # to test and build the image with :dev tag

$ make run  # builds AND executes the application in your terminal

The deployment is made using Terraform to a AWS t2.nano instance. The execution plan works as follows:

⚠️ This configuration uses SSH to provision the Docker service, to pull and execute the image; it may not be the most secure option for you.