Generate requirements.txt for a given requirements.in file using a Docker container.

Dockerfile

# Set the version of Python you want to use here.
FROM python:3.12.2-slim@sha256:36d57d7f9948fefe7b6092cfe8567da368033e71ba281b11bb9eeffce3d45bc6 as base

# Ignore this. This is needed to build Online Boutique's recommendationservice.
# RUN apt-get -qq update \
#    && apt-get install -y --no-install-recommends \
#        wget g++ \
#    && rm -rf /var/lib/apt/lists/*

# This Dockerfile assumes that the requirements.in file is in the same folder as this Dockerfile.
COPY requirements.in .

# Install pip-tools which will contain pip-compile.
RUN pip install -U pip pip-tools

# Generate requirements.txt.
RUN pip-compile --output-file=requirements.txt requirements.in

# Let's test that the requirements.txt actually installs dependencies properly.
RUN pip install -r requirements.txt

# Finally, print out the contents of requirements.txt
# when you build this Docker container image
RUN cat requirements.txt
# and when you run this Docker container image
ENTRYPOINT ["cat", "requirements.txt"]

Instructions

1. Copy this Gist into a file called Dockerfile.
2. Place the Dockerfile file and your requirements.in file in the same folder.
3. From that folder, build the Docker container:

   docker build . -t my-docker-container
   

4. You'll see the contents of the requirements.txt in the previous step, but you can also run the container for cleaner output:

   docker run my-docker-container
   

Without Docker

If you aren't able to use docker, you can use gcloud to build a Dockerfile and push it to an Artifact Registry.

1. Set environment variables:

   export PROJECT_ID=...
   export IMAGE_TAG=...
   

2. Create the Artifact Registry repository:

   gcloud artifacts repositories create my-docker-registry \
       --project=${PROJECT_ID} \
       --repository-format=docker \
       --location=us-central1 --description="My Docker registry"
   

3. Build the repository:

   gcloud builds submit \
       --project=${PROJECT_ID} \
       --tag us-central1-docker.pkg.dev/${PROJECT_ID}/my-docker-registry/${IMAGE_TAG} .