Changes to publishing pipeline

[asavaritayal]

The following changes are required to the Python publishing workflow for GA:

func publish

1. Check if requirements.txt has changed. If it hasn't, skip to step 4.
2. Run packapp.py to install dependencies using pip.
3. If native dependencies without wheels are required, step 2 should fail with the following error:
   "ERROR: cannot install <package name - version> dependency: binary dependencies without wheels are not supported. Use func publish --build-native-deps to build using a docker container**.
   More information at https://aka.ms/func-python-publish"
4. Zip deploy to Linux

func publish --build-native-deps

1. Check if requirements.txt has changed. If it hasn't, skip to step 3.
2. Builds the dependencies only using docker
   Note: In the short term, we'll retain the PyInstaller path as default along with the --no-bundler option.
3. Zip deploy to Linux

In addition to the above, we'll also require the following commands to support VS Code and DevOps scenarios:

func pack

1. Check if requirements.txt has changed. If it hasn't, no action is required.
2. Run packapp.py to install dependencies using pip.
3. If native dependencies without wheels are required, step 2 should fail with the appropriate error code.

func pack --build-native-deps

1. Check if requirements.txt has changed. If it hasn't, no action is required.
2. Builds the dependencies only using docker
   Note: In the short term, we'll retain the PyInstaller path as default.

func publish --no-build

• Zip deploy to Linux

Issues for this Epic:

• Re-use build artifacts  #1118
• func azure functionapp publish --no-build  #1117
• Standardize virtual environment between --build-native-deps and packapp #1015 (slightly related - goal is to standardize build output across the board)

[asavaritayal]

/cc @ahmelsayed @anirudhgarg

[jeffhollan]

Would ‘build’ do anything outside of Python? I’m not sure I’d want that to be the verb if it only does something unique to 1 language. Maybe “func build” could do also do “func extensions install?” Pretty much it becomes the command to prep and download dependencies for any language.

I’m not saying we need to make it do all that from day 1, but if build only makes sense for Python maybe it’s a flag on func publish like ‘func publish —build-python?” Just thinking out loud

[ColbyTresness]

@asavaritayal can you explain to me how az functionapp devops-build create enables the above?

[asavaritayal]

@ColbyTresness I'd removed the az webapp devops-build instructions from the above since we weren't able to make it work for Python yet but I can explain offline how it integrates into the overall workflow.

[ColbyTresness]

It should work for python - it just might not do what you think it does. Happy to sync offline and update here.

[asavaritayal]

@fabiocav here are the work items corresponding to this Epic:

• Re-use build artifacts  #1118

• func azure functionapp publish --no-build  #1117

• Standardize virtual environment between --build-native-deps and packapp #1015 (slightly related - goal is to standardize build output across the board)