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# frozen_string_literal: true
module Sprockets
module Preprocessors
# Private: Adds a default map to assets when one is not present
#
# If the input file already has a source map, it effectively returns the original
# result. Otherwise it maps 1 for 1 lines original to generated. This is needed
# Because other generators run after might depend on having a valid source map
# available.
class DefaultSourceMap
def call(input)
result = { data: input[:data] }
map = input[:metadata][:map]
filename = input[:filename]
load_path = input[:load_path]
lines = input[:data].lines.length
basename = File.basename(filename)
mime_exts = input[:environment].config[:mime_exts]
pipeline_exts = input[:environment].config[:pipeline_exts]
if map.nil? || map.empty?
result[:map] = {
"version" => 3,
"file" => PathUtils.split_subpath(load_path, filename),
"mappings" => default_mappings(lines),
"sources" => [PathUtils.set_pipeline(basename, mime_exts, pipeline_exts, :source)],
"names" => []
}
else
result[:map] = map
end
result[:map]["x_sprockets_linecount"] = lines
return result
end
private
def default_mappings(lines)
if (lines == 0)
""
elsif (lines == 1)
"AAAA"
else
"AAAA;" + "AACA;"*(lines - 2) + "AACA"
end
end
end
end
end
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