120 lines
3.0 KiB
Ruby
Executable File
120 lines
3.0 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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# frozen_string_literal: true
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require 'open3'
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class MigrationSchemaValidator
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FILENAME = 'db/structure.sql'
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MIGRATION_DIRS = %w[db/migrate db/post_migrate].freeze
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SCHEMA_VERSION_DIR = 'db/schema_migrations'
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VERSION_DIGITS = 14
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def validate!
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if committed_migrations.empty?
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puts "\e[32m No migrations found, skipping schema validation\e[0m"
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return
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end
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validate_schema_on_rollback!
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validate_schema_on_migrate!
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validate_schema_version_files!
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end
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private
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def validate_schema_on_rollback!
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committed_migrations.reverse_each do |filename|
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version = find_migration_version(filename)
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run("bin/rails db:migrate:down VERSION=#{version}")
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end
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git_command = "git diff #{diff_target} -- #{FILENAME}"
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base_message = "rollback of added migrations does not revert #{FILENAME} to previous state"
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validate_clean_output!(git_command, base_message)
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end
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def validate_schema_on_migrate!
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run('bin/rails db:migrate')
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git_command = "git diff -- #{FILENAME}"
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base_message = "the committed #{FILENAME} does not match the one generated by running added migrations"
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validate_clean_output!(git_command, base_message)
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end
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def validate_schema_version_files!
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git_command = "git add -A -n #{SCHEMA_VERSION_DIR}"
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base_message = "the committed files in #{SCHEMA_VERSION_DIR} do not match those expected by the added migrations"
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validate_clean_output!(git_command, base_message)
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end
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def committed_migrations
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@committed_migrations ||= begin
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git_command = "git diff --name-only --diff-filter=A #{diff_target} -- #{MIGRATION_DIRS.join(' ')}"
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run(git_command).split("\n")
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end
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end
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def diff_target
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@diff_target ||= pipeline_for_merged_results? ? target_branch : merge_base
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end
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def merge_base
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run("git merge-base #{target_branch} #{source_ref}")
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end
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def target_branch
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ENV['CI_MERGE_REQUEST_TARGET_BRANCH_NAME'] || ENV['TARGET'] || ENV['CI_DEFAULT_BRANCH'] || 'master'
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end
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def source_ref
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ENV['CI_COMMIT_SHA'] || 'HEAD'
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end
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def pipeline_for_merged_results?
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ENV.key?('CI_MERGE_REQUEST_SOURCE_BRANCH_SHA')
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end
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def find_migration_version(filename)
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file_basename = File.basename(filename)
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version_match = /\A(?<version>\d{#{VERSION_DIGITS}})_/.match(file_basename)
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die "#{filename} has an invalid migration version" if version_match.nil?
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version_match[:version]
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end
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def validate_clean_output!(command, base_message)
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command_output = run(command)
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return if command_output.empty?
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die "#{base_message}:\n#{command_output}"
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end
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def die(message, error_code: 1)
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puts "\e[31mError: #{message}\e[0m"
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exit error_code
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end
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def run(cmd)
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puts "\e[32m$ #{cmd}\e[37m"
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stdout_str, stderr_str, status = Open3.capture3(cmd)
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puts "#{stdout_str}#{stderr_str}\e[0m"
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die "command failed: #{stderr_str}" unless status.success?
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stdout_str.chomp
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end
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end
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MigrationSchemaValidator.new.validate!
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