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Contents
module R10K
module Util
module Commands
module_function
# Find the full path of a shell command.
#
# On POSIX platforms, the PATHEXT environment variable will be unset, so
# the first command named 'cmd' will be returned.
#
# On Windows platforms, the PATHEXT environment variable will contain a
# semicolon delimited list of executable file extensions, so the first
# command with a matching path extension will be returned.
#
# @param cmd [String] The name of the command to search for
# @return [String, nil] The path to the file if found, nil otherwise
def which(cmd)
exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']
ENV['PATH'].split(File::PATH_SEPARATOR).each do |dir|
exts.each do |ext|
path = File.join(dir, "#{cmd}#{ext}")
if File.executable?(path) && File.file?(path)
return path
end
end
end
nil
end
end
end
end
Version data entries
80 entries across 80 versions & 2 rubygems