Set up rbs_collection.yaml and add a TypeProf-generated prototype rbs

.github/workflows/test.yaml

@@ -35,6 +35,7 @@ jobs:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
       - run: bundle install
+      - run: bundle exec rbs collection install
       - run: bundle exec steep check
   test-ruby:
     runs-on: ubuntu-20.04

.gitignore

@@ -2,3 +2,4 @@
 .irbrc
 /Gemfile.lock
 /pkg/
+/.gem_rbs_collection/

rbs_collection.lock.yaml

@@ -0,0 +1,26 @@
+---
+sources:
+- type: git
+  name: ruby/gem_rbs_collection
+  revision: d0d7aeed98fa74427b30b336fc402ea86d526f35
+  remote: https://github.com/ruby/gem_rbs_collection.git
+  repo_dir: gems
+path: ".gem_rbs_collection"
+gems:
+- name: erb
+  version: '0'
+  source:
+    type: stdlib
+- name: stackprof
+  version: '0.2'
+  source:
+    type: git
+    name: ruby/gem_rbs_collection
+    revision: d0d7aeed98fa74427b30b336fc402ea86d526f35
+    remote: https://github.com/ruby/gem_rbs_collection.git
+    repo_dir: gems
+- name: strscan
+  version: '0'
+  source:
+    type: stdlib
+gemfile_lock_path: Gemfile.lock

rbs_collection.yaml

@@ -0,0 +1,22 @@
+# Download sources
+sources:
+  - type: git
+    name: ruby/gem_rbs_collection
+    remote: https://github.com/ruby/gem_rbs_collection.git
+    revision: main
+    repo_dir: gems
+
+# You can specify local directories as sources also.
+# - type: local
+#   path: path/to/your/local/repository
+
+# A directory to install the downloaded RBSs
+path: .gem_rbs_collection
+
+gems:
+  # Skip loading rbs gem's RBS.
+  # It's unnecessary if you don't use rbs as a library.
+  - name: rbs
+    ignore: true
+  - name: strscan
+  - name: erb