✨ Add Docker support (#168, #102)

Co-authored-by: bpro <iserver12345@gmail.com>

.github/workflows/docker-image.yml

@@ -0,0 +1,44 @@
+name: "Build Docker image"
+
+on:
+  release:
+    types:
+      - published
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build-docker:
+    name: "🐳 Build and publish Docker image"
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: "Checkout repository"
+        uses: actions/checkout@v2
+
+      - name: "❓ Find the release semantic version"
+        id: semver
+        uses: Steffo99/actions-semver@v0.1.0
+
+      - name: "🔨 Setup Buildx"
+        uses: docker/setup-buildx-action@v1
+
+      - name: "🔑 Login to GitHub Containers"
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: RYGhub
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: "🏗 Build and push the Docker image"
+        uses: docker/build-push-action@v2
+        with:
+          tags: >-
+            ghcr.io/Steffo99/greed:${{ steps.semver.outputs.full }},
+            ghcr.io/Steffo99/greed:${{ steps.semver.outputs.patch }},
+            ghcr.io/Steffo99/greed:${{ steps.semver.outputs.minor }},
+            ghcr.io/Steffo99/greed:${{ steps.semver.outputs.major }},
+            ghcr.io/Steffo99/greed:latest
+          push: true

.gitignore

@@ -105,3 +105,4 @@ config/config.ini
 config/config.toml
 *.sqlite
 *.sqlite-journal
+data/

Dockerfile

@@ -0,0 +1,20 @@
+FROM python:3.10 AS labels
+LABEL maintainer="Stefano Pigozzi <me@steffo.eu>"
+LABEL description="A customizable, multilanguage Telegram shop bot"
+
+FROM labels AS dependencies
+COPY requirements.txt ./requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
+
+FROM dependencies AS greed
+COPY . /usr/src/greed
+WORKDIR /usr/src/greed
+
+FROM greed AS entry
+ENTRYPOINT ["python", "-OO"]
+CMD ["core.py"]
+
+FROM entry AS environment
+ENV PYTHONUNBUFFERED=1
+ENV CONFIG_PATH="/etc/greed/config.toml"
+ENV DB_ENGINE="sqlite:////var/lib/greed/database.sqlite"

README.md

@@ -16,7 +16,91 @@ Use the special credit card number `4242 4242 4242 4242` to add unlimited credit
 
 ![](https://i.imgur.com/9plMzO6.png)
 
-## Installation
+## Installation via Docker
+
+This installation procedure assumes you are on a system with `docker` installed, with a supported CPU architecture.
+
+### Requirements
+
+* [Docker Engine](https://docs.docker.com/get-docker/)
+* An Internet connection
+* A Telegram bot token (obtainable at [@Botfather](https://t.me/Botfather))
+* A payment provider token (obtainable by [connecting a provider with your bot](https://t.me/Botfather))
+
+### Steps
+
+1. Run a container using the project's Docker image:
+   ```console
+   # docker run --volume "$(pwd)/config:/etc/greed" --volume "$(pwd)/strings:/usr/src/greed/strings" --volume "$(pwd)/data:/var/lib/greed" ghcr.io/steffo99/greed
+   ```
+
+2. Edit the configuration file `config.toml` that was created in the `strings` directory, adding your bot and payment tokens to it:
+   ```console
+   # nano config/config.toml
+   ```
+   (Press **Ctrl+X** and then two times **Enter** to save and quit `nano`.)
+
+3. _Optional:_ customize the files in the `strings` folder for custom messages.
+
+4. Start the bot:
+    ```console
+    python -OO core.py
+    ```
+
+5. Open Telegram, and send a `/start` command to your bot to be automatically promoted to 💼 Manager.
+
+6. Stop the bot by pressing **Ctrl+C**.
+
+### Running the bot
+
+After the installation, to run the bot, you'll need to:
+
+1. Run its Docker container from the same directory you installed it from:
+   ```console
+   # docker run --volume "$(pwd)/config:/etc/greed" --volume "$(pwd)/strings:/usr/src/greed/strings" --volume "$(pwd)/data:/var/lib/greed" ghcr.io/steffo99/greed
+   ```
+
+### Keep the bot running
+
+If you want to keep the bot open even after you closed your terminal window, you'll need to pass the appropriate arguments to the docker command:
+
+1. Set the Docker container to always restart and to detach on successful start:
+   ```console
+   # docker run --detach --restart always --volume "$(pwd)/config:/etc/greed" --volume "$(pwd)/strings:/usr/src/greed/strings" --volume "$(pwd)/data:/var/lib/greed" ghcr.io/steffo99/greed
+   ```
+
+### Updating
+
+To update the bot, run the following commands:
+
+1. Find the ID of the Docker container of the bot:
+   ```console
+   # docker container ls
+   CONTAINER ID   IMAGE                    COMMAND                CREATED         STATUS                  PORTS     NAMES
+   abcdefabcdef   ghcr.io/steffo99/greed   "python -OO core.py"   6 seconds ago   Up Less than a second             relaxed_hypatia
+   ```
+
+2. Stop the Docker container of the bot:
+   ```console
+   # docker container stop abcdefabcdef
+   ```
+
+3. Remove the Docker container of the bot:
+   ```console
+   # docker container rm abcdefabcdef
+   ```
+
+4. Pull the latest Docker image of the bot:
+   ```console
+   # docker pull ghcr.io/steffo99/greed:latest
+   ```
+
+5. Restart the bot with the newly downloaded image:
+   ```console
+   # docker run --detach --restart always --volume "$(pwd)/config:/etc/greed" --volume "$(pwd)/strings:/usr/src/greed/strings" --volume "$(pwd)/data:/var/lib/greed" ghcr.io/steffo99/greed
+   ```
+
+## Installation from source
 
 This installation procedure assumes you are on a Linux system, using `bash` and have `python3.8` installed. 
 
@@ -33,42 +117,42 @@ Consider renting a VPS to host the bot on; a cheap one should do, as greed is pr
 ### Steps
 
 1. Download the project files by running:
-   ```bash
+   ```console
    git clone https://github.com/Steffo99/greed.git
    ```
    
 2. Enter the newly created folder:
-   ```bash
+   ```console
    cd greed
    ```
 
 3. Create a new virtualenv:
-   ```bash
+   ```console
    python3.8 -m venv venv
    ```
 
 4. Activate the virtualenv:
-   ```bash
+   ```console
    source venv/bin/activate
    ```
 
 5. Install the project requirements:
-   ```bash
+   ```console
    pip install -r requirements.txt
    ```
    
 6. _Optional:_ For colored console output, install [coloredlogs](https://pypi.org/project/coloredlogs/):
-   ```bash
+   ```console
    pip install coloredlogs
    ```
 
 7. Generate the configuration file:
-   ```bash
+   ```console
    python -OO core.py
    ```
 
-8. Edit the configuration file, adding your bot and payment tokens to it:
+8. Edit the configuration file `config.toml`, adding your bot and payment tokens to it:
-   ```bash
+   ```console
    nano config/config.toml
    ```
    (Press **Ctrl+X** and then two times **Enter** to save and quit `nano`.)
@@ -76,7 +160,7 @@ Consider renting a VPS to host the bot on; a cheap one should do, as greed is pr
 9. _Optional:_ customize the files in the `strings` folder for custom messages.
 
 10. Start the bot:
-    ```bash
+    ```console
     python -OO core.py
     ```
 
@@ -157,7 +241,7 @@ Assuming you downloaded `greed` in `/srv/greed`:
    ```bash
    systemctl enable bot-greed   
    ```
-   
+
 ### Updating
 
 To update the bot, run the following commands:

config/template_config.toml

@@ -24,6 +24,7 @@ fallback_language = "en"
 [Database]
 # The database engine you want to use.
 # Refer to http://docs.sqlalchemy.org/en/latest/core/engines.html for the possible settings.
+# This value is ignored if you're running greed via Docker, or if the DB_ENGINE environment variable is set.
 engine = "sqlite:///database.sqlite"
 
 

core.py

@@ -33,26 +33,29 @@ def main():
         log.fatal("config/template_config.toml does not exist!")
         exit(254)
 
+    # Check where the config path is located from the CONFIG_PATH environment variable
+    config_path = os.environ.get("CONFIG_PATH", "config/config.toml")
+
     # If the config file does not exist, clone the template and exit
-    if not os.path.isfile("config/config.toml"):
+    if not os.path.isfile(config_path):
         log.debug("config/config.toml does not exist.")
 
         with open("config/template_config.toml", encoding="utf8") as template_cfg_file, \
-                open("config/config.toml", "w", encoding="utf8") as user_cfg_file:
+                open(config_path, "w", encoding="utf8") as user_cfg_file:
             # Copy the template file to the config file
             user_cfg_file.write(template_cfg_file.read())
 
-        log.fatal("A config file has been created in config/config.toml."
+        log.fatal("A config file has been created."
                   " Customize it, then restart greed!")
         exit(1)
 
     # Compare the template config with the user-made one
     with open("config/template_config.toml", encoding="utf8") as template_cfg_file, \
-            open("config/config.toml", encoding="utf8") as user_cfg_file:
+            open(config_path, encoding="utf8") as user_cfg_file:
         template_cfg = nuconfig.NuConfig(template_cfg_file)
         user_cfg = nuconfig.NuConfig(user_cfg_file)
         if not template_cfg.cmplog(user_cfg):
-            log.fatal("There were errors while parsing the config.toml file. Please fix them and restart greed!")
+            log.fatal("There were errors while parsing the config file. Please fix them and restart greed!")
             exit(2)
         else:
             log.debug("Configuration parsed successfully!")
@@ -71,9 +74,18 @@ def main():
     # Ignore most python-telegram-bot logs, as they are useless most of the time
     logging.getLogger("telegram").setLevel("ERROR")
 
+    # Find the database URI
+    # Through environment variables first
+    if db_engine := os.environ.get("DB_ENGINE"):
+        log.debug("Sqlalchemy engine overridden by the DB_ENGINE envvar.")
+    # Then via the config file
+    else:
+        db_engine = user_cfg["Database"]["engine"]
+        log.debug("Using sqlalchemy engine set in the configuration file.")
+
     # Create the database engine
     log.debug("Creating the sqlalchemy engine...")
-    engine = sqlalchemy.create_engine(user_cfg["Database"]["engine"])
+    engine = sqlalchemy.create_engine(db_engine)
     log.debug("Binding metadata to the engine...")
     database.TableDeclarativeBase.metadata.bind = engine
     log.debug("Creating all missing tables...")