IOEXT-2183: fix: reload config after pre-app hooks and default --web-optimize from NODE_ENV (CEXT-6815)

[iivvaannxx]

Description

Two changes:

1. Reload config after every pre-app hook. Hooks can write to .env, but only run and the deploy-actions path reloaded config afterwards. aio-lib-core-config is now reloaded after:

   • pre-app-build in app build, which app deploy also runs
   • the pre-deploy hooks in app deploy, so DB auto-provisioning and the web deploy see the new values
   • pre-app-undeploy in app undeploy
   • pre-app-build and pre-app-deploy in src/lib/build-actions.js and src/lib/deploy-actions.js, which app run uses when action files change

2. --web-optimize defaults from NODE_ENV. The flag no longer defaults to false. When you don't pass it, the web build is optimized if NODE_ENV=production. The value is read at build time, after the pre-app-build reload, so NODE_ENV from .env is respected. --no-web-optimize is now available to turn optimization off in production.

Related Issue

IOEXT-2183 (blocks CEXT-6815)

Companion PR: adobe/aio-lib-web#248 (Parcel mode from NODE_ENV in aio-lib-web)

Motivation and Context

Values that pre-app hooks wrote to .env were ignored by later steps, and production web builds were never minified unless you passed the flag.

How Has This Been Tested?

• The touched suites (app/build, app/deploy, app/undeploy, app/run, lib/build-actions, lib/deploy-actions) pass: 206 tests, 10 of them new. The new tests check that the reload happens after the pre-hook and before the next step, and cover each --web-optimize/NODE_ENV combination.
• eslint src test is clean.
• On a fresh npm install of current master, 107 unrelated tests fail locally both with and without this change.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly. (README flag text is regenerated by oclif readme on version)
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[aroragarvit666-hue]

@sandeep-paliwal, @iivvaannxx -- For someone who has added pre-hooks changing .env in their app, this would be a sudden behaviour change, right ? Do you think this should be activated with an additional flag in the command ? So that it doesn't break anything ?

Same with web-optimize. Why to make it automatic for Production apps ? Although, I agree this doesn't seem to bring any functional impact on the apps so not much concerned about this.

[iivvaannxx]

@aroragarvit666-hue I get your point, but pre-hooks are not a user-invoked command that we can add a flag to :(

They are invoked automatically via the aio CLI. Maybe we could add an env var like AIO_RELOAD_ENV_ON_HOOKS and only do this if that value is truthy. Another option is to accept it's a behavior change and release a major, which I would not see as a problem either. I did a similar change in the past in #906 in case you want to check what the past team did with it.

The web-optimize change is probably unnecessary, given that aio-lib-web now sets production via NODE_ENV (see PR). I believe web-optimize is the default in that mode. I would keep it just in case, though.