Add site-specific environment variables in local builds

This issue is part of the bigger issue at #667

Site-specific environment variables (git, build, etc.) are missing in local builds (Netlify CLI and programmatically):

• BRANCH
• BUILD_ID
• CACHED_COMMIT_REF
• COMMIT_REF
• CONTEXT
• DEPLOY_ID
• DEPLOY_PRIME_URL
• DEPLOY_URL
• HEAD
• NETLIFY_IMAGES_CDN_DOMAIN
• PULL_REQUEST
• REPOSITORY_URL
• REVIEW_ID
• URL

My first question is whether the list above is correct?

My second question is for @netlify/backend: how to retrieve the information above? I know the getSite API endpoint can be used, but does it include all that information? Can someone pinpoints which property is used for each environment variable? Are some of the environment variables using some conditional logic to find out their value?

Thanks!

[DavidWells]

We don’t need NETLIFY_IMAGES_CDN_DOMAIN

URL is important. ( REPOSITORY_URL too but less so)

CLI should be able to pass in this value

[kitop]

I believe the backend work on the API token passed to Netlify Build (netlify/bitballoon#4980) should be done first to complete that item @DavidWells @kitop?

Why’s that? Isn’t this for running build in local CLI (ie, user’s machine)? If so, it should have a user token already.