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dev-desktop-github-app.md

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Github App for pushing to github from the dev-desktops

These instructions are for server-side setup and debugging of the dev-desktop github app. The user only needs to be directed to the app installation URL and everything should just work for them.

We're using the python github library for all github operations. You can find the docs at https://pygithub.readthedocs.io/en/latest/introduction.html

How to setup an App

  1. Go to https://github.com/settings/apps
  2. New Github App
  3. Fill out metadata (name and url)
  4. disable WebHook checkbox
  5. Set Contents - Repository contents, commits, branches, downloads, releases, and merges. to read/write
  6. Set Workflows - Update GitHub Action workflow files. to read/write
  7. Set to "enable on any account"
  8. Create App
  9. Go to https://github.com/settings/apps/{your_app_name_here} and copy the App ID into app_id.txt (same folder as gen_temp_access_token.py)

How to generate a .pem file for your App

  1. Go to https://github.com/settings/apps/{your_app_name_here}#private-key and generate a private key
  2. Download starts, save it to somewhere private.
  3. copy the .pem file into the same folder as the gen_temp_access_token.py and name it dev-desktop.private-key.pem

How to install the app for a user

  1. direct the user to https://github.com/settings/apps/{your_app_name_here}/installations
  2. let them install it on the org/user they want to and restrict to the repositories they want to use

How to generate a temporary access token for a specific user

  1. invoke gen_temp_access_token.py <github_username> <github_repository_name>

Integration into git command line

We're using credential-helpers. For debugging a credential helper, have it in userspace and invoke it with

git -c credential.helper -c credential.UseHttpPath=true /path/to/helper push origin branch

Note that this does not work for remotes that are registered with ssh urls. You must use https!

The first command line argument is get, store or remove. In our case, we just abort (exit(0)) for everything but get, as we regenerate credentials on every invocation anyway.

The actual arguments are passed via stdin and usually look like

protocol=https
host=github.com
path=your_repo.git