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#!/usr/bin/env ruby
require 'trollop'
def make_shards(input, refs, alignments, output_prefix, num_shards=2, rand=false)
lc = `wc -l #{input}`.split.first.to_i
input_ext = input.split('.').last
refs_ext = refs.split('.').last
index = (0..lc-1).to_a
index.reverse!
index.shuffle! if rand
shard_sz = lc / num_shards
leftover = lc % num_shards
in_f = ReadFile.new input
in_lines = in_f.readlines
refs_f = ReadFile.new refs
refs_lines = refs_f.readlines
a_f = ReadFile.new alignments
a_lines = a_f.readlines
shard_in_files = []
shard_refs_files = []
shard_a_files = []
in_fns = []
refs_fns = []
a_fns = []
0.upto(num_shards-1) { |shard|
in_fn = "#{output_prefix}.#{shard}.#{input_ext}"
shard_in = WriteFile.new in_fn
in_fns << in_fn
refs_fn = "#{output_prefix}.#{shard}.#{refs_ext}"
shard_refs = WriteFile.new refs_fn
refs_fns << refs_fn
a_fn = "#{output_prefix}.#{shard}.a"
shard_a = WriteFile.new a_fn
a_fns << a_fn
0.upto(shard_sz-1) { |i|
j = index.pop
shard_in.write in_lines[j]
shard_refs.write refs_lines[j]
shard_a.write a_lines[j]
}
shard_in_files << shard_in
shard_refs_files << shard_refs
shard_a_files << shard_a
}
if !rand
while leftover > 0
j = index.pop
shard_in_files[-1].write in_lines[j]
shard_refs_files[-1].write refs_lines[j]
shard_a_files[-1].write a_lines[j]
leftover -= 1
end
else
0.upto(num_shards-1) { |shard|
break if leftover <= 0
j = index.pop
shard_in_files[shard].write in_lines[j]
shard_refs_files[shard].write refs_lines[j]
shard_a_files[shard].write a_lines[j]
leftover -= 1
}
end
(shard_in_files + shard_refs_files).each do |f| f.close end
in_f.close
refs_f.close
return [in_fns, refs_fns]
end
opts = Trollop::options do
opt :input, 'input', :type => :string, :required => true
opt :references, 'references', :type => :string, :required => true
opt :alignments, 'alignments', :type => :string, :required => true
opt :output_prefix, 'output prefix', :type => :string, :required => true
opt :randomize, 'randomize', :type => :bool, :default => false, :short => '-z'
opt :num_shards, 'number of shards', :type => :int, :required => true
end
make_shards(opts[:input], opts[:references], opts[:alignments], opts[:output_prefix], opts[:num_shards], opts[:randomize])
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