GHA: allow overriding the repo manifest

Enable building with a custom fork of the repo manifest enabling patched forks to be used as the source of a build.

Author: compnerd

.github/workflows/build-toolchain.yml

@@ -3,6 +3,12 @@ name: Development Snapshot
 on:
  workflow_dispatch:
  inputs:
+ repo_url:
+ description: 'Repo Manifest URL'
+ default: 'https://github.com/compnerd/swift-build'
+ required: false
+ type: string
+
  swift_version:
  description: 'Swift Version'
  default: '0.0.0'
@@ -48,6 +54,12 @@ on:
  default: false
  type: boolean
 
+ stable_point:
+ description: 'Use Repo Smart Sync'
+ type: boolean
+ default: false
+ required: false
+
  workflow_call:
  inputs:
  swift_version:
@@ -227,7 +239,7 @@ jobs:
  branch_name="release/$branch_version_string"
  fi
 
- repo init --quiet --groups default --depth 1 -u https://github.com/compnerd/swift-build -b $branch_name
+ repo init --quiet --groups default --depth 1 -u ${{ inputs.repo_url }} -b $branch_name
  repo sync --quiet --no-clone-bundle --no-tags --jobs $(nproc --all)
 
  if [[ "${{ inputs.swift_tag }}" != "" ]] ; then