module Asciidoctor::Diagram::Which
Public Class Methods
which(cmd, options = {})
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@private
# File lib/asciidoctor-diagram/util/which.rb, line 5 def self.which(cmd, options = {}) exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : [''] paths = (options[:path] || []) + (ENV['PATH'] ? ENV['PATH'].split(File::PATH_SEPARATOR) : []) paths.each do |path| exts.each { |ext| exe = File.join(path, "#{cmd}#{ext}") return exe if File.executable? exe } end nil end
Public Instance Methods
which(parent_block, cmd, options = {})
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# File lib/asciidoctor-diagram/util/which.rb, line 19 def which(parent_block, cmd, options = {}) attr_names = options[:attrs] || options.fetch(:alt_attrs, []) + [cmd] cmd_names = [cmd] + options.fetch(:alt_cmds, []) cmd_var = 'cmd-' + attr_names[0] if config.key? cmd_var cmd_path = config[cmd_var] else cmd_path = attr_names.map { |attr_name| parent_block.attr(attr_name, nil, true) }.find { |attr| !attr.nil? } unless cmd_path && File.executable?(cmd_path) cmd_paths = cmd_names.map do |c| ::Asciidoctor::Diagram::Which.which(c, :path => options[:path]) end cmd_path = cmd_paths.reject { |c| c.nil? }.first end config[cmd_var] = cmd_path if cmd_path.nil? && options.fetch(:raise_on_error, true) raise "Could not find the #{cmd_names.map { |c| "'#{c}'" }.join(', ')} executable in PATH; add it to the PATH or specify its location using the '#{attr_names[0]}' document attribute" end end cmd_path end