[cherry-pick] '4862-verify-file-checksums'

See merge request gitlab-org/gitlab-ee!4753

4 files changed, 171 insertions, 0 deletions

diff --git a/lib/gitlab/verify/batch_verifier.rb b/lib/gitlab/verify/batch_verifier.rb
new file mode 100644
index 00000000000..1ef369a4b67
--- /dev/null
+++ b/lib/gitlab/verify/batch_verifier.rb
@@ -0,0 +1,64 @@
+module Gitlab
+  module Verify
+    class BatchVerifier
+      attr_reader :batch_size, :start, :finish
+
+      def initialize(batch_size:, start: nil, finish: nil)
+        @batch_size = batch_size
+        @start = start
+        @finish = finish
+      end
+
+      # Yields a Range of IDs and a Hash of failed verifications (object => error)
+      def run_batches(&blk)
+        relation.in_batches(of: batch_size, start: start, finish: finish) do |relation| # rubocop: disable Cop/InBatches
+          range = relation.first.id..relation.last.id
+          failures = run_batch(relation)
+
+          yield(range, failures)
+        end
+      end
+
+      def name
+        raise NotImplementedError.new
+      end
+
+      def describe(_object)
+        raise NotImplementedError.new
+      end
+
+      private
+
+      def run_batch(relation)
+        relation.map { |upload| verify(upload) }.compact.to_h
+      end
+
+      def verify(object)
+        expected = expected_checksum(object)
+        actual = actual_checksum(object)
+
+        raise 'Checksum missing' unless expected.present?
+        raise 'Checksum mismatch' unless expected == actual
+
+        nil
+      rescue => err
+        [object, err]
+      end
+
+      # This should return an ActiveRecord::Relation suitable for calling #in_batches on
+      def relation
+        raise NotImplementedError.new
+      end
+
+      # The checksum we expect the object to have
+      def expected_checksum(_object)
+        raise NotImplementedError.new
+      end
+
+      # The freshly-recalculated checksum of the object
+      def actual_checksum(_object)
+        raise NotImplementedError.new
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/verify/lfs_objects.rb b/lib/gitlab/verify/lfs_objects.rb
new file mode 100644
index 00000000000..970e2a7b718
--- /dev/null
+++ b/lib/gitlab/verify/lfs_objects.rb
@@ -0,0 +1,27 @@
+module Gitlab
+  module Verify
+    class LfsObjects < BatchVerifier
+      def name
+        'LFS objects'
+      end
+
+      def describe(object)
+        "LFS object: #{object.oid}"
+      end
+
+      private
+
+      def relation
+        LfsObject.with_files_stored_locally
+      end
+
+      def expected_checksum(lfs_object)
+        lfs_object.oid
+      end
+
+      def actual_checksum(lfs_object)
+        LfsObject.calculate_oid(lfs_object.file.path)
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/verify/rake_task.rb b/lib/gitlab/verify/rake_task.rb
new file mode 100644
index 00000000000..dd138e6b92b
--- /dev/null
+++ b/lib/gitlab/verify/rake_task.rb
@@ -0,0 +1,53 @@
+module Gitlab
+  module Verify
+    class RakeTask
+      def self.run!(verify_kls)
+        verifier = verify_kls.new(
+          batch_size: ENV.fetch('BATCH', 200).to_i,
+          start: ENV['ID_FROM'],
+          finish: ENV['ID_TO']
+        )
+
+        verbose = Gitlab::Utils.to_boolean(ENV['VERBOSE'])
+
+        new(verifier, verbose).run!
+      end
+
+      attr_reader :verifier, :output
+
+      def initialize(verifier, verbose)
+        @verifier = verifier
+        @verbose = verbose
+      end
+
+      def run!
+        say "Checking integrity of #{verifier.name}"
+
+        verifier.run_batches { |*args| run_batch(*args) }
+
+        say 'Done!'
+      end
+
+      def verbose?
+        !!@verbose
+      end
+
+      private
+
+      def say(text)
+        puts(text) # rubocop:disable Rails/Output
+      end
+
+      def run_batch(range, failures)
+        status_color = failures.empty? ? :green : :red
+        say "- #{range}: Failures: #{failures.count}".color(status_color)
+
+        return unless verbose?
+
+        failures.each do |object, error|
+          say "  - #{verifier.describe(object)}: #{error.inspect}".color(:red)
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/verify/uploads.rb b/lib/gitlab/verify/uploads.rb
new file mode 100644
index 00000000000..0ffa71a6d72
--- /dev/null
+++ b/lib/gitlab/verify/uploads.rb
@@ -0,0 +1,27 @@
+module Gitlab
+  module Verify
+    class Uploads < BatchVerifier
+      def name
+        'Uploads'
+      end
+
+      def describe(object)
+        "Upload: #{object.id}"
+      end
+
+      private
+
+      def relation
+        Upload.with_files_stored_locally
+      end
+
+      def expected_checksum(upload)
+        upload.checksum
+      end
+
+      def actual_checksum(upload)
+        Upload.hexdigest(upload.absolute_path)
+      end
+    end
+  end
+end