Add oneshot.rake for removing duplicated commit

Author: k0kubun

lib/tasks/temporary/oneshot.rake

@@ -0,0 +1,20 @@
+namespace :oneshot do
+  desc 'Remove duplicated commit'
+  task remove_duplicates: :environment do
+    commit = Commit.find(28796) # unlink commit
+    if commit.sha1 != "f2dec4ab9615807b7eaee25e5be24b271e2283b3"
+      raise "wrong sha1: #{commit.sha1}"
+    end
+    type = BenchmarkResultType.find_by(name: 'Execution time', unit: 'Seconds')
+
+    BenchmarkType.all.each do |benchmark_type|
+      unless benchmark_type.script_url.match(%r[\Ahttps://raw.githubusercontent.com/ruby-bench/ruby-bench-suite/master/ruby/benchmark/])
+        next
+      end
+
+      if run = benchmark_type.benchmark_runs.where(initiator: commit, benchmark_result_type: type)
+        run.destroy
+      end
+    end
+  end
+end