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module UnpackStrategy
class Fossil
include UnpackStrategy
def self.can_extract?(path:, magic_number:)
return false unless magic_number.match?(/\ASQLite format 3\000/n)
# Fossil database is made up of artifacts, so the `artifact` table must exist.
query = "select count(*) from sqlite_master where type = 'view' and name = 'artifact'"
Utils.popen_read("sqlite3", path, query).to_i == 1
end
private
def extract_to_dir(unpack_dir, basename:, verbose:)
args = if @ref_type && @ref
[@ref]
else
[]
end
with_env "PATH" => PATH.new(Formula["fossil"].opt_bin, ENV["PATH"]) do
safe_system "fossil", "open", path, *args, chdir: unpack_dir
end
end
end
end