59 lines
1.7 KiB
Ruby
59 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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module Migrations
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class IntermediateDatabaseMigrator
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class << self
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def reset!(path)
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[path, "#{path}-wal", "#{path}-shm"].each { |p| FileUtils.rm_f(p) if File.exist?(p) }
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end
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def migrate(path)
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connection = IntermediateDatabase.create_connection(path: path)
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performed_migrations = find_performed_migrations(connection)
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path = File.join(::Migrations.root_path, "db", "schema")
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migrate_from_path(connection, path, performed_migrations)
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connection.close
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end
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private
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def new_database?(connection)
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connection.query_single_splat(<<~SQL) == 0
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SELECT COUNT(*)
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FROM sqlite_schema
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WHERE type = 'table' AND name = 'schema_migrations'
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SQL
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end
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def find_performed_migrations(connection)
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return Set.new if new_database?(connection)
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connection.query_splat(<<~SQL).to_set
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SELECT path
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FROM schema_migrations
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SQL
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end
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def migrate_from_path(connection, migration_path, performed_migrations)
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file_pattern = File.join(migration_path, "*.sql")
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Dir[file_pattern].sort.each do |path|
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relative_path = Pathname(path).relative_path_from(Migrations.root_path).to_s
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unless performed_migrations.include?(relative_path)
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sql = File.read(path)
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sql_hash = Digest::SHA1.hexdigest(sql)
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connection.execute(sql)
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connection.execute(<<~SQL, path: relative_path, sql_hash: sql_hash)
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INSERT INTO schema_migrations (path, created_at, sql_hash)
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VALUES (:path, datetime('now'), :sql_hash)
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SQL
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end
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end
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end
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end
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end
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end
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