73 lines
1.8 KiB
Ruby
73 lines
1.8 KiB
Ruby
module Rscons
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# Functionality for an instance of the rscons application invocation.
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class Application
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# @return [Boolean]
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# Whether to output ANSI color escape sequences.
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attr_accessor :do_ansi_color
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# @return [Integer]
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# The number of threads to use when scheduling subprocesses.
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attr_accessor :n_threads
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# @return [VarSet]
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# Access any variables set on the rscons command-line.
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attr_reader :vars
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def initialize
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@vars = VarSet.new
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@n_threads = determine_n_threads
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end
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# Run the specified operation.
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#
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# @param operation [String]
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# The operation to perform (e.g. "clean", "configure", "build", etc...)
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#
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# @return [Integer]
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# Process exit code (0 on success).
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def run(operation)
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# TODO
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0
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end
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private
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# Determine the number of threads to use by default.
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#
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# @return [Integer]
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# The number of threads to use by default.
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def determine_n_threads
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# If the user specifies the number of threads in the environment, then
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# respect that.
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if ENV["RSCONS_NTHREADS"] =~ /^(\d+)$/
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return $1.to_i
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end
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# Otherwise try to figure out how many threads are available on the
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# host hardware.
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begin
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case RbConfig::CONFIG["host_os"]
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when /linux/
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return File.read("/proc/cpuinfo").scan(/^processor\s*:/).size
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when /mswin|mingw/
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if `wmic cpu get NumberOfLogicalProcessors /value` =~ /NumberOfLogicalProcessors=(\d+)/
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return $1.to_i
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end
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when /darwin/
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if `sysctl -n hw.ncpu` =~ /(\d+)/
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return $1.to_i
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end
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end
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rescue
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end
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# If we can't figure it out, default to 1.
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1
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end
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end
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end
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