Class: Doodle::App
Overview
command line option handling DSL implemented using Doodle
Defined Under Namespace
Constant Summary collapse
- RX_ISODATE =
regular expression for ISO date
/^\d{4}-\d{2}-\d{2}[T ]\d{2}:\d{2}:\d{2}(\.\d+)? ?Z$/
Class Method Summary collapse
-
.boolean(*args, &block) ⇒ Object
expect an on/off flag, e.g.
-
.date(*args, &block) ⇒ Object
date: -d 2008-09-28.
-
.filename(*args, &block) ⇒ Object
expect a filename - set
:existing => true
to specify that the file must exist filename :input, :existing => true, :flag => “i”, :doc => “input file name”. -
.help_text ⇒ Object
defines the help text displayed when option –help passed.
-
.integer(*args, &block) ⇒ Object
whole number, e.g.
-
.option(*args, &block) ⇒ Object
the generic option - can be any type.
- .optional ⇒ Object (also: options)
- .optional? ⇒ Boolean
- .required ⇒ Object
- .required_args ⇒ Object
-
.run(argv = ARGV) ⇒ Object
call App.run to start your application (calls instance.run).
-
.std_flags ⇒ Object
use this to include ‘standard’ flags: help (-h, –help), verbose (-v, –verbose) and debug (-d, –debug).
-
.string(*args, &block) ⇒ Object
expect a string.
-
.symbol(*args, &block) ⇒ Object
expect a symbol (and convert from String).
-
.tidy_dir(path) ⇒ Object
replace the full directory path with ./ where appropriate.
-
.time(*args, &block) ⇒ Object
time: -d 2008-09-28T18:00:00.
-
.utcdate(*args, &block) ⇒ Object
utcdate: -d 2008-09-28T21:41:29Z - actually uses Time (so restricted range).
Methods inherited from Doodle
context, parent, raise_exception_on_error, raise_exception_on_error=
Methods included from Core
Class Method Details
.boolean(*args, &block) ⇒ Object
expect an on/off flag, e.g. -b
-
doesn’t take any arguments (mere presence sets it to true)
-
booleans are false by default
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# File 'lib/doodle/app.rb', line 182 def boolean(*args, &block) args = [{ :using => Option, :default => false, :arity => 0}, *args] da = option(*args, &block) da.instance_eval do kind FalseClass, TrueClass from NilClass do false end from Numeric do |n| n == 0 ? false : true end from String do |s| case s when "on", "true", "yes", "1" true when "off", "false", "no", "0" false else raise Doodle::ValidationError, "unknown value for boolean: #{s}" end end end end |
.date(*args, &block) ⇒ Object
date: -d 2008-09-28
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# File 'lib/doodle/app.rb', line 218 def date(*args, &block) args = [{ :using => Option, :kind => Date }, *args] da = option(*args, &block) da.instance_eval do from String do |s| Date.parse(s) end end end |
.filename(*args, &block) ⇒ Object
expect a filename - set :existing => true
to specify that the file must exist
filename :input, :existing => true, :flag => "i", :doc => "input file name"
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# File 'lib/doodle/app.rb', line 168 def filename(*args, &block) args = [{ :using => Filename, :kind => String }, *args ] da = option(*args, &block) da.instance_eval do if da.existing must "exist" do |s| File.exist?(s) end end end end |
.help_text ⇒ Object
defines the help text displayed when option –help passed
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# File 'lib/doodle/app.rb', line 433 def help_text format_block = proc {|key, flag, doc, required, kind| sprintf(" %-3s %-14s %-10s %s %s", flag, key, kind, doc, required ? '(REQUIRED)' : '') } required, = help_attributes.partition{ |a| a[3]} [ self.doc, "\n", self.usage ? ["Usage: " + self.usage, "\n"] : [], required.size > 0 ? ["Required args:", required.map(&format_block), "\n"] : [], .size > 0 ? ["Options:", .map(&format_block), "\n"] : [], (self.examples && self.examples.size > 0) ? "Examples:\n" + " " + self.examples.join("\n ") : [], ] end |
.integer(*args, &block) ⇒ Object
whole number, e.g. -n 10
-
you can use, e.g. :values => [1,2,3] or :values => (0..99) to restrict the range of valid values
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# File 'lib/doodle/app.rb', line 207 def integer(*args, &block) args = [{ :using => Option, :kind => Integer }, *args] da = option(*args, &block) da.instance_eval do from String do |s| s =~ /^\d+$/ or raise "must be a whole number" s.to_i end end end |
.option(*args, &block) ⇒ Object
the generic option - can be any type
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# File 'lib/doodle/app.rb', line 101 def option(*args, &block) #p [:option, args, :optional, optional?] key_values, args = args.partition{ |x| x.kind_of?(Hash)} key_values = key_values.inject({ }){ |hash, kv| hash.merge(kv)} errors = [] # handle optional/required flipflop if optional? required = { :default => nil } if key_values.delete(:required) if key_values.key?(:optional) errors << "Can't specify both :required and :optional" end if key_values.key?(:default) errors << "Can't specify both :required and :default" end required = { } elsif key_values.delete(:optional) && !key_values.key?(:default) required = { :default => nil } end else key_values.delete(:required) required = { } end args = [{ :using => Option }.merge(required).merge(key_values), *args] da = has(*args, &block) if errors.size > 0 raise ArgumentError, "#{da.name}: #{errors.join(', ')}", [caller[-1]] end da.instance_eval do #p [:checking_values, values, values.class] if da.values.kind_of?(Range) must "be in range #{da.values}" do |s| da.values.include?(s) end elsif da.values.respond_to?(:size) && da.values.size > 0 must "be one of #{da.values.join(', ')}" do |s| da.values.include?(s) end end if da.match must "match pattern #{da.match.inspect}" do |s| #p [:matching, s, da.match.inspect] s.to_s =~ da.match end end end da end |
.optional ⇒ Object Also known as: options
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# File 'lib/doodle/app.rb', line 89 def optional @optional = true end |
.optional? ⇒ Boolean
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# File 'lib/doodle/app.rb', line 92 def optional? instance_variable_defined?("@optional") ? @optional : false end |
.required ⇒ Object
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# File 'lib/doodle/app.rb', line 86 def required @optional = false end |
.required_args ⇒ Object
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# File 'lib/doodle/app.rb', line 95 def required_args doodle.attributes.select{ |k, v| v.required?}.map{ |k,v| v} end |
.run(argv = ARGV) ⇒ Object
call App.run to start your application (calls instance.run)
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# File 'lib/doodle/app.rb', line 262 def run(argv = ARGV) begin app = from_argv(argv) if app.help puts help_text else app.run end rescue Object => e if exit_status == 0 exit_status 1 end puts "\nERROR: #{e}" ensure exit(exit_status) end end |
.std_flags ⇒ Object
use this to include ‘standard’ flags: help (-h, –help), verbose (-v, –verbose) and debug (-d, –debug)
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# File 'lib/doodle/app.rb', line 253 def std_flags boolean :help, :flag => "h", :doc => "display this help" boolean :verbose, :flag => "v", :doc => "verbose output" boolean :debug, :flag => "D", :doc => "turn on debugging" end |
.string(*args, &block) ⇒ Object
expect a string
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# File 'lib/doodle/app.rb', line 152 def string(*args, &block) args = [{ :using => Option, :kind => String }, *args] da = option(*args, &block) end |
.symbol(*args, &block) ⇒ Object
expect a symbol (and convert from String)
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# File 'lib/doodle/app.rb', line 157 def symbol(*args, &block) args = [{ :using => Option, :kind => Symbol }, *args] da = option(*args, &block) da.instance_eval do from String do |s| s.to_sym end end end |
.tidy_dir(path) ⇒ Object
replace the full directory path with ./ where appropriate
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# File 'lib/doodle/app.rb', line 33 def self.tidy_dir(path) path.to_s.gsub(Regexp.new("^#{ Regexp.escape(Dir.pwd) }/"), './') end |
.time(*args, &block) ⇒ Object
time: -d 2008-09-28T18:00:00
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# File 'lib/doodle/app.rb', line 228 def time(*args, &block) args = [{ :using => Option, :kind => Time }, *args] da = option(*args, &block) da.instance_eval do from String do |s| Time.parse(s) end end end |
.utcdate(*args, &block) ⇒ Object
utcdate: -d 2008-09-28T21:41:29Z
-
actually uses Time (so restricted range)
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# File 'lib/doodle/app.rb', line 239 def utcdate(*args, &block) args = [{ :using => Option, :kind => Time }, *args] da = option(*args, &block) da.instance_eval do from String do |s| if s !~ RX_ISODATE raise ArgumentError, "date must be in ISO format (YYYY-MM-DDTHH:MM:SS, e.g. #{Time.now.utc.xmlschema})" end Time.parse(s) end end end |