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Marshall Polaris 7f2bbdcb87
Allow people to sell all their shares (#599)
2022-07-05 12:26:51 -07:00
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README.md

NOTE: Adapted from One Word's /functions doc. Fix any errors you see!

Firestore Cloud Functions

This is code that doesn't make sense on the frontend client, e.g.

  • Long-running or slow operation (database)
  • Tasks that need to be run every so often (syncing email list to Mailjet)
  • Anything we should't trust to clients (secrets, auth)

If you want to make and test changes, you'll have to do a bit of setup...

Installing

Adapted from https://firebase.google.com/docs/functions/get-started

  1. $ cd functions to switch to this folder
  2. $ yarn global add firebase-tools to install the Firebase CLI globally
  3. $ yarn to install JS dependencies
  4. $ firebase login to authenticate the CLI tools to Firebase
  5. $ firebase use dev to choose the dev project

For local development

  1. Install gcloud CLI

  2. If you don't have java (or see the error Error: Process java -version has exited with code 1. Please make sure Java is installed and on your system PATH.):

    1. $ brew install java
    2. $ sudo ln -sfn /opt/homebrew/opt/openjdk/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk.jdk

  3. $ gcloud auth login to authenticate the CLI tools to Google Cloud

  4. $ gcloud config set project <project-id> to choose the project ($ gcloud projects list to see options)

  5. $ mkdir firestore_export to create a folder to store the exported database

  6. $ yarn db:update-local-from-remote to pull the remote db from Firestore to local 0. TODO: this won't work when open source, we'll have to point to the public db

Developing locally

  1. $ firebase use dev if you haven't already
  2. $ yarn serve to spin up the emulators 0. The Emulator UI is at http://localhost:4000; the functions are hosted on :5001. Note: You have to kill and restart emulators when you change code; no hot reload =(
  3. $ yarn dev:emulate in /web to connect to emulators with the frontend 0. Note: emulated database is cleared after every shutdown

Firestore Commands

  • db:update-local-from-remote - Pull the remote db from Firestore to local, also calls:
    • db:backup-remote - Exports the remote dev db to the backup folder on Google Cloud Storage (called on every db:update-local-from-remote)
    • db:rename-remote-backup-folder - Renames the remote backup folder (called on every db:backup-remote to preserve the previous db backup)
  • db:backup-local - Save the local db changes to the disk (overwrites existing)

Debugging

  • Find local logs directly in the shell that ran $ yarn dev
  • Find deployed logs here

Deploying

  1. $ firebase use prod to switch to prod
  2. $ firebase deploy --only functions to push your changes live! (Future TODO: auto-deploy functions on Git push)

Secrets management

Secrets are strings that shouldn't be checked into Git (eg API keys, passwords). We store these using Google Secret Manager, which provides them as environment variables to functions that require them. Some useful workflows:

  • Set a secret: $ firebase functions:secrets:set stripe.test_secret="THE-API-KEY"
  • Read a secret: $ firebase functions:secrets:access STRIPE_APIKEY