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module ZipTricks::UniquifyFilename
# Makes a given filename unique by appending a (n) suffix
# between just before the filename extension. So "file.txt" gets
# transformed into "file (1).txt". The transformation is applied
# repeatedly as long as the generated filename is present
# in `while_included_in` object
#
# @param path[String] the path to make unique
# @param while_included_in[#include?] an object that stores the list of already used paths
# @return [String] the path as is, or with the suffix required to make it unique
def self.call(path, while_included_in)
return path unless while_included_in.include?(path)
# we add (1), (2), (n) at the end of a filename before the filename extension,
# but only if there is a duplicate
copy_pattern = /\((\d+)\)$/
parts = path.split('.')
ext = if parts.last =~ /gz|zip/ && parts.size > 2
parts.pop(2)
elsif parts.size > 1
parts.pop
end
fn_last_part = parts.pop
duplicate_counter = 1
loop do
fn_last_part = if fn_last_part =~ copy_pattern
fn_last_part.sub(copy_pattern, "(#{duplicate_counter})")
else
"#{fn_last_part} (#{duplicate_counter})"
end
new_path = (parts + [fn_last_part, ext]).compact.join('.')
return new_path unless while_included_in.include?(new_path)
duplicate_counter += 1
end
end
end
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13 entries across 13 versions & 1 rubygems