fix: silverback build missing files during generate

[johnson2427]

What I did

Added a check for requirements.txt and ape-config.yaml so silverback build doesn't fail if those files don't exist

fixes: #150

How I did it

Removed the lines pertaining to the requirements.txt and ape-config.yaml files and move them into a conditional within the build command.

How to verify it

python3 -m venv venv
pip install <this pr>
cd /to/a/silverback/directory/project
sivlerback build --generate

Check your dockerfile output in .silverback-images

mv requirements.txt req.txt

or if that file didn't exist

touch requirements.txt

silverback build --generate

Check your dockerfile output in .silverback-images and the requirements.txt lines should no longer be there.

Checklist

• Passes all linting checks (pre-commit and CI jobs)
• New test cases have been added and are passing
• Documentation has been updated
• PR title follows Conventional Commit standard (will be automatically included in the changelog)

[fubuloubu]

btw is there a way to tee the output of the build command so we see it in the output while it's building?

[johnson2427]

btw is there a way to tee the output of the build command so we see it in the output while it's building?

That subprocess is supposed to do so with the stdout. I'll dig into this

[johnson2427]

@fubuloubu let me know how you'd like these changes to look. We're now getting a proper output (I was overwriting the PIPE to stderr from stdout before).

[fubuloubu]

Looks perfect!

$ silverback build --generate
Generated ./.silverback-images/Dockerfile.paymaster
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile.paymaster
#1 transferring dockerfile: 445B done
#1 DONE 0.0s

#2 [internal] load metadata for ghcr.io/apeworx/silverback:stable
#2 DONE 0.0s

#3 [internal] load .dockerignore
#3 transferring context: 2B done
#3 DONE 0.0s

#4 [1/8] FROM ghcr.io/apeworx/silverback:stable
#4 DONE 0.0s

#5 [internal] load build context
#5 transferring context: 589B done
#5 DONE 0.0s

#6 [6/8] COPY ape-config.yaml .
#6 CACHED

#7 [5/8] RUN pip install --upgrade pip && pip install -r requirements.txt
#7 CACHED

#8 [4/8] COPY requirements.txt .
#8 CACHED

#9 [2/8] WORKDIR /app
#9 CACHED

#10 [3/8] RUN chown harambe:harambe /app
#10 CACHED

#11 [7/8] RUN ape plugins install -U .
#11 CACHED

#12 [8/8] COPY bots/paymaster.py /app/bot.py
#12 CACHED

#13 exporting to image
#13 exporting layers done
#13 writing image sha256:a8ac40894696c0fbf0c425525d749d2504ae6d3201e5359afd1275bbf0a2188c done
#13 naming to docker.io/library/paymaster:latest done
#13 DONE 0.0s

[fubuloubu]

Actually @johnson2427, there is a utility function in ape that will hide your home directory path with $HOME, can you use that where it says Generated [...]/.silverback-images/Dockerfile.?

[fubuloubu]

Looks much cleaner, some small updates I want to make