fix: install poetry with pipx when running in docker

Dockerfile

@@ -1,22 +1,36 @@
 FROM python:3.9-slim
 
 # Set pip to have cleaner logs and no saved cache
+# Set poetry to not make virtualenvs
+# set pipx to use the same folder that pip puts scripts in
 ENV PIP_NO_CACHE_DIR=false \
-    POETRY_VIRTUALENVS_CREATE=false
+    POETRY_VIRTUALENVS_IN_PROJECT=true \
+    POETRY_INSTALLER_PARALLEL=false \
+    PIPX_BIN_DIR=/usr/local/bin
 
-# Install poetry
-RUN pip install -U poetry
+# install poetry
+# this is pinned because sometimes versions have bugs, and this version is reliable enough to use
+RUN pip install poetry==1.1.7
 
 # See https://github.com/python-poetry/poetry/issues/3336
 RUN poetry config experimental.new-installer false
 
 # Create the working directory
 WORKDIR /modmail
 
+# copy the required files to install the dependencies.
+COPY ./pyproject.toml .
+COPY ./poetry.lock .
+
+
+# Install project dependencies
+RUN poetry install --no-dev --no-root
+
 # Copy the source code in last to optimize rebuilding the image
 COPY . .
 
-# Install project dependencies
+# install the package itself.
+# this is required for importlib.metadata to work
 RUN poetry install --no-dev
 
-CMD ["python", "-m", "modmail"]
+CMD ["poetry","run","python", "-m", "modmail"]

pyproject.toml

@@ -76,21 +76,9 @@ line-length = 110
 target-version = ['py38']
 include = '\.pyi?$'
 
-[tool.taskipy.tasks.export]
-cmd = """
-echo 'Exporting installed packages to requirements.txt.\n\
-This task automatically relocks the lock file using "poetry lock --no-update"' && \
-poetry lock --no-update && \
-echo '# Do not manually edit.\n# Generate with "poetry run task export"\n' > requirements.txt && \
-echo "Exporting..." && \
-poetry export --without-hashes >> requirements.txt && \
-echo "Done exporting."
-"""
-help = "Export installed packages in requirements.txt format"
-
 [tool.taskipy.tasks]
 # Documentation
-docs = { cmd = "mkdocs serve", help = "Run the docs on a local automatically reloading server"}
+docs = { cmd = "mkdocs serve", help = "Run the docs on a local automatically reloading server" }
 
 # Bot
 start = { cmd = "python -m modmail", help = "Run bot" }
@@ -103,7 +91,7 @@ lint = { cmd = "pre-commit run --all-files", help = "Checks all files for CI err
 
 # Testing
 codecov-validate = { cmd = "curl --data-binary @.codecov.yml https://codecov.io/validate", help = "Validate `.codecov.yml` with their api." }
-cov-server = { cmd = "coverage html", help = "Start an http.server for viewing coverage data."}
+cov-server = { cmd = "coverage html", help = "Start an http.server for viewing coverage data." }
 post-cov-server = "python -m http.server 8012 --bind 127.0.0.1 --directory htmlcov"
 report = { cmd = "coverage report", help = "Show coverage report from previously run tests." }
 test = { cmd = "pytest -n auto --dist loadfile", help = "Runs tests and save results to a coverage report" }