37 lines
1.4 KiB
Ruby
37 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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require 'openssl'
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module I18n
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module Backend
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# Overwrites the Base load_file method to cache loaded file contents.
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module CacheFile
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# Optionally provide path_roots array to normalize filename paths,
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# to make the cached i18n data portable across environments.
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attr_accessor :path_roots
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protected
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# Track loaded translation files in the `i18n.load_file` scope,
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# and skip loading the file if its contents are still up-to-date.
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def load_file(filename)
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initialized = !respond_to?(:initialized?) || initialized?
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key = I18n::Backend::Flatten.escape_default_separator(normalized_path(filename))
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old_mtime, old_digest = initialized && lookup(:i18n, key, :load_file)
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return if (mtime = File.mtime(filename).to_i) == old_mtime ||
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(digest = OpenSSL::Digest::SHA256.file(filename).hexdigest) == old_digest
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super
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store_translations(:i18n, load_file: { key => [mtime, digest] })
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end
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# Translate absolute filename to relative path for i18n key.
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def normalized_path(file)
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return file unless path_roots
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path = path_roots.find(&file.method(:start_with?)) ||
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raise(InvalidLocaleData.new(file, 'outside expected path roots'))
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file.sub(path, path_roots.index(path).to_s)
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end
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end
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end
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end
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