feat(init): infer runtime from source template

Author: 0xPlayerOne

.github/scripts/init-repo.sh

@@ -11,7 +11,7 @@ force=false
 languages="${REPO_FOUNDRY_LANGUAGES:-auto}"
 features="${REPO_FOUNDRY_FEATURES:-all}"
 package_manager="${REPO_FOUNDRY_PACKAGE_MANAGER:-auto}"
-runtime_repository="${REPO_FOUNDRY_RUNTIME_REPOSITORY:-0xPlayerOne/code-foundry}"
+runtime_repository="${REPO_FOUNDRY_RUNTIME_REPOSITORY:-}"
 bootstrap=true
 release_type="${REPO_FOUNDRY_RELEASE_TYPE:-auto}"
 npm_publish="${REPO_FOUNDRY_NPM_PUBLISH:-false}"
@@ -38,7 +38,7 @@ Options:
   --features LIST            all or comma-separated optional features:
                              ci,codeql,security,test,draft-pr,release-pr,release,dependabot
   --package-manager NAME     auto, bun, pnpm, yarn, or npm
-  --runtime-repository OWNER/REPO  Reusable workflow runtime repository
+  --runtime-repository OWNER/REPO  Reusable workflow runtime repository (auto from source)
   --release-type NAME        auto, node, python, rust, or simple
   --license NAME             agpl-3.0-or-later, mit, preserve, or none
   --license-file PATH        Use an exact custom license file
@@ -111,9 +111,9 @@ sync_args=(
   --languages "$languages"
   --features "$features"
   --package-manager "$package_manager"
-  --runtime-repository "$runtime_repository"
   --license "$license"
 )
+if [ -n "$runtime_repository" ]; then sync_args+=(--runtime-repository "$runtime_repository"); fi
 if [ -n "$license_file" ]; then sync_args+=(--license-file "$license_file"); fi
 if [ "$dry_run" = true ]; then sync_args+=(--check); else sync_args+=(--apply); fi
 if [ "$prune" = true ]; then sync_args+=(--prune); fi

.github/scripts/sync-template.sh

@@ -370,16 +370,22 @@ for file in "${files[@]}"; do
 done
 
 # Reusable workflow callers must use a literal repository/ref. Render the
-# selected runtime repository while leaving custom workflows untouched.
+# selected runtime repository while leaving custom workflows untouched. Read
+# the source's configured runtime first so forks remain self-contained.
+source_runtime_repository=""
+if [ -f "$template_root/.github/template.yml" ]; then
+  source_runtime_repository="$(awk -F': ' '/^runtime_repository:/ {print $2; exit}' "$template_root/.github/template.yml")"
+fi
+[ -n "$source_runtime_repository" ] || source_runtime_repository="0xPlayerOne/code-foundry"
 for file in .github/workflows/ci.yml .github/workflows/test.yml .github/workflows/security.yml .github/workflows/codeql.yml; do
   [ -f "$file" ] || continue
-  if grep -q '0xPlayerOne/code-foundry' "$file"; then
+  if grep -qF "$source_runtime_repository" "$file" && [ "$source_runtime_repository" != "$runtime_repository" ]; then
     changed=$((changed + 1))
     if [ "$mode" = "check" ]; then
       printf 'Would render runtime repository in %s\n' "$file"
     else
       rendered_workflow="$(mktemp)"
-      sed "s#0xPlayerOne/code-foundry#$runtime_repository#g" "$file" > "$rendered_workflow"
+      sed "s#${source_runtime_repository}#${runtime_repository}#g" "$file" > "$rendered_workflow"
       mv "$rendered_workflow" "$file"
       printf 'Rendered runtime repository in %s\n' "$file"
     fi

README.md

@@ -36,11 +36,12 @@ npx code-foundry init --license agpl-3.0-or-later
 npx code-foundry init --license-file ./legal/LICENSE.txt
 ```
 
-Reusable workflow callers default to this package's public runtime. Use
-`--runtime-repository OWNER/REPO` when initializing from an organization fork;
-the selected repository is saved in `.github/template.yml` and rendered into
-the small `ci.yml` and `test.yml` wrappers automatically. The equivalent
-environment variable is `REPO_FOUNDRY_RUNTIME_REPOSITORY`.
+Reusable workflow callers use the source template's runtime automatically. For
+example, initializing from `NiftyLeague/template-repo` selects that fork's
+runtime without extra flags. Use `--runtime-repository OWNER/REPO` (or
+`REPO_FOUNDRY_RUNTIME_REPOSITORY`) only when you want to override it. The
+selected repository is saved in `.github/template.yml` and rendered into the
+small CI, Test, Security, and CodeQL wrappers automatically.
 
 Normal synchronization imports only the local hook, agent-facing command,
 profile/release, initializer, doctor, ownership, and protection entrypoints.

src/cli.mjs

@@ -50,7 +50,10 @@ function parseArgs(argv) {
     languages: process.env.REPO_FOUNDRY_LANGUAGES || 'auto',
     features: process.env.REPO_FOUNDRY_FEATURES || 'all',
     packageManager: process.env.REPO_FOUNDRY_PACKAGE_MANAGER || 'auto',
-    runtimeRepository: process.env.REPO_FOUNDRY_RUNTIME_REPOSITORY || '0xPlayerOne/code-foundry',
+    // Leave this empty unless the caller explicitly selects a runtime. The
+    // initializer can then derive the runtime from --source, which keeps
+    // organization forks plug-and-play.
+    runtimeRepository: process.env.REPO_FOUNDRY_RUNTIME_REPOSITORY || '',
     releaseType: process.env.REPO_FOUNDRY_RELEASE_TYPE || 'auto',
     license: process.env.REPO_FOUNDRY_LICENSE || (command === 'init' ? 'agpl-3.0-or-later' : 'preserve'),
     licenseFile: process.env.REPO_FOUNDRY_LICENSE_FILE || '',
@@ -123,7 +126,7 @@ function main() {
   if (options.licenseFile) common.push('--license-file', options.licenseFile)
   if (options.languagesSet) common.push('--languages', options.languages)
   if (options.featuresSet) common.push('--features', options.features)
-  common.push('--runtime-repository', options.runtimeRepository)
+  if (options.runtimeRepository) common.push('--runtime-repository', options.runtimeRepository)
   if (options.prune) common.push('--prune')
   if (options.force) common.push('--force')
   if (options.dryRun) common.push('--check')
@@ -137,10 +140,10 @@ function main() {
       '--languages', options.languages,
       '--features', options.features,
       '--package-manager', options.packageManager,
-      '--runtime-repository', options.runtimeRepository,
       '--release-type', options.releaseType,
       '--license', options.license,
     ]
+    if (options.runtimeRepository) initArgs.push('--runtime-repository', options.runtimeRepository)
     if (options.licenseFile) initArgs.push('--license-file', options.licenseFile)
     if (options.protection) initArgs.push('--protection')
     if (options.dryRun) initArgs.push('--dry-run')