Add a rake task to generate build metadata

1 files changed, 18 insertions, 0 deletions

diff --git a/task/build_metadata.rake b/task/build_metadata.rake
new file mode 100644
index 0000000000..5104898026
--- /dev/null
+++ b/task/build_metadata.rake
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+file "lib/bundler/generated/build_metadata.rb" => [".git/HEAD", __FILE__] do |t|
+  build_metadata = {
+    :built_at => BUNDLER_SPEC.date.strftime("%Y-%m-%d"),
+    :git_sha => `git rev-parse --short HEAD`.strip,
+    :release => Rake::Task["release"].instance_variable_get(:@already_invoked),
+  }
+
+  File.open(t.name, "w") {|f| f << <<-RUBY }
+# frozen_string_literal: true
+
+module Bundler
+  BUILD_METADATA = {
+#{build_metadata.sort.map {|k, v| "    #{k.inspect} => #{BUNDLER_SPEC.send(:ruby_code, v)}," }.join("\n")}
+  }.freeze
+end
+  RUBY
+end