github: support multi-org GitHub App installations#1
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bradfitz
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Replace the single-installation gitBasicAuthTransport with a
multiOrgTransport that discovers and caches per-org GitHub App
installations. At startup, GET /app/installations enumerates all
orgs the App is installed on and pre-populates the cache. On cache
miss (new org installed after startup), the transport lazily calls
GET /orgs/{org}/installation.
The org is extracted from the request URL path (first path segment,
lowercased) and matched to the correct installation token, which is
set as HTTP basic auth for GitHub's git smart HTTP endpoints.
This removes the --github-app-install-id flag; all installations
are now discovered dynamically from the GitHub API.
Signed-off-by: Patrick O'Doherty <patrick@tailscale.com>
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Replace the single-installation gitBasicAuthTransport with a multiOrgTransport that discovers and caches per-org GitHub App installations. At startup, GET /app/installations enumerates all orgs the App is installed on and pre-populates the cache. On cache miss (new org installed after startup), the transport lazily calls GET /orgs/{org}/installation.
The org is extracted from the request URL path (first path segment, lowercased) and matched to the correct installation token, which is set as HTTP basic auth for GitHub's git smart HTTP endpoints.
This removes the --github-app-install-id flag; all installations are now discovered dynamically from the GitHub API.