Class: LibCLImate::Climate
- Inherits:
-
Object
- Object
- LibCLImate::Climate
- Includes:
- Xqsr3::Quality::ParameterChecking
- Defined in:
- lib/libclimate/climate.rb
Overview
Class used to gather together the CLI specification, and execute it
The standard usage pattern is as follows:
PROGRAM_VERSION = [ 0, 1, 2 ]
= {}
climate = LibCLImate::Climate.new do |cl|
cl.add_flag('--verbose', alias: '-v', help: 'Makes program output verbose') { [:verbose] = true }
cl.add_option('--flavour', alias: '-f', help: 'Specifies the flavour') do |o, a|
[:flavour] = check_flavour(o.value) or cl.abort "Invalid flavour '#{o.value}'; use --help for usage"
end
cl.usage_values = '<value-1> [ ... <value-N> ]'
cl.info_lines = [
'ACME CLI program (using libCLImate)',
:version,
'An example program',
]
end
Instance Attribute Summary collapse
-
#aliases ⇒ ::Array
readonly
An array of aliases attached to the climate instance, whose contents should be modified by adding (or removing) CLASP aliases.
-
#constrain_values ⇒ ::Integer, ::Range
Optional constraint on the values that must be provided to the program.
-
#exit_on_missing ⇒ boolean
Indicates whether exit will be called (with non-zero exit code) when a required command-line option is missing.
-
#exit_on_unknown ⇒ boolean
Indicates whether exit will be called (with non-zero exit code) when an unknown command-line flag or option is encountered.
-
#exit_on_usage ⇒ boolean
Indicates whether exit will be called (with zero exit code) when usage/version is requested on the command-line.
-
#flags_and_options ⇒ ::String
section.
-
#ignore_unknown ⇒ Object
Indicates whether unknown flags or options will be ignored.
-
#info_lines ⇒ ::Array
Optional array of string of program-information that will be written before the rest of the usage block when usage is requested on the command-line.
-
#program_name ⇒ ::String
A program name; defaults to the name of the executing script.
-
#stderr ⇒ ::IO
The output stream for contingent output; defaults to $stderr.
-
#stdout ⇒ ::IO
The output stream for normative output; defaults to $stdout.
-
#usage_values ⇒ ::String
Optional string to describe the program values, eg <xyz “[ { <<directory> | <file> } ]”.
-
#value_names ⇒ ::Array
Zero-based array of names for values to be used when that value is not present (according to the
:constrain_values
attribute). -
#version ⇒ ::String, ::Array
A version string or an array of integers representing the version component(s).
Instance Method Summary collapse
-
#abort(message, options = {}) ⇒ Object
Calls abort() with the given message prefixed by the program_name.
-
#add_alias(name_or_alias, *aliases) ⇒ Object
Adds an alias to
aliases
. -
#add_flag(name_or_flag, options = {}, &block) ⇒ Object
Adds a flag to
aliases
. -
#add_option(name_or_option, options = {}, &block) ⇒ Object
Adds an option to
aliases
. -
#initialize(options = {}) {|_self| ... } ⇒ Climate
constructor
Creates an instance of the Climate class.
-
#run(argv = ARGV) ⇒ Object
Executes the prepared Climate instance.
- #set_program_name(name) ⇒ Object deprecated Deprecated.
Constructor Details
#initialize(options = {}) {|_self| ... } ⇒ Climate
Creates an instance of the Climate class.
Signature
-
Parameters:
options:
-
An options hash, containing any of the following options.
-
Options:
:no_help_flag
-
(boolean) Prevents the use of the
CLASP::Flag.Help
flag-alias:no_version_flag
-
(boolean) Prevents the use of the
CLASP::Flag.Version
flag-alias:program_name
-
(::String) An explicit program-name, which is
inferred from $0 if this is
nil
:version
-
A version specification. If not specified, this is
inferred
:version_context
-
Object or class that defines a context for
searching the version. Ignored if
:version
is specified
- Block
-
An optional block which receives the constructing instance, allowing the user to modify the attributes.
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# File 'lib/libclimate/climate.rb', line 286 def initialize(={}) # :yields: climate check_parameter , 'options', allow_nil: true, type: ::Hash ||= {} check_option , :no_help_flag, type: :boolean, allow_nil: true check_option , :no_version_flag, type: :boolean, allow_nil: true check_option , :program_name, type: ::String, allow_nil: true pr_name = [:program_name] unless pr_name pr_name = File.basename($0) pr_name = (pr_name =~ /\.(?:bat|cmd|rb|sh)$/) ? "#$`(#$&)" : pr_name end @aliases = [] @ignore_unknown = false @exit_on_unknown = true @exit_on_missing = true @exit_on_usage = true @info_lines = nil set_program_name pr_name @stdout = $stdout @stderr = $stderr @constrain_values = nil @flags_and_options = @usage_values = usage_values @value_names = [] version_context = [:version_context] @version = [:version] || infer_version_(version_context) @aliases << CLASP::Flag.Help(handle: proc { show_usage_ }) unless [:no_help_flag] @aliases << CLASP::Flag.Version(handle: proc { show_version_ }) unless [:no_version_flag] yield self if block_given? end |
Instance Attribute Details
#aliases ⇒ ::Array (readonly)
An array of aliases attached to the climate instance, whose contents should be modified by adding (or removing) CLASP aliases
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# File 'lib/libclimate/climate.rb', line 337 def aliases @aliases end |
#constrain_values ⇒ ::Integer, ::Range
Returns Optional constraint on the values that must be provided to the program.
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# File 'lib/libclimate/climate.rb', line 375 def constrain_values @constrain_values end |
#exit_on_missing ⇒ boolean
Indicates whether exit will be called (with non-zero exit code) when a required command-line option is missing
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# File 'lib/libclimate/climate.rb', line 343 def exit_on_missing @exit_on_missing end |
#exit_on_unknown ⇒ boolean
Indicates whether exit will be called (with non-zero exit code) when an unknown command-line flag or option is encountered
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# File 'lib/libclimate/climate.rb', line 351 def exit_on_unknown @exit_on_unknown end |
#exit_on_usage ⇒ boolean
Returns Indicates whether exit will be called (with zero exit code) when usage/version is requested on the command-line.
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# File 'lib/libclimate/climate.rb', line 353 def exit_on_usage @exit_on_usage end |
#flags_and_options ⇒ ::String
section
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# File 'lib/libclimate/climate.rb', line 378 def @flags_and_options end |
#ignore_unknown ⇒ Object
Indicates whether unknown flags or options will be ignored. This overrides :exit_on_unknown
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# File 'lib/libclimate/climate.rb', line 346 def ignore_unknown @ignore_unknown end |
#info_lines ⇒ ::Array
Returns Optional array of string of program-information that will be written before the rest of the usage block when usage is requested on the command-line.
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# File 'lib/libclimate/climate.rb', line 355 def info_lines @info_lines end |
#program_name ⇒ ::String
Returns A program name; defaults to the name of the executing script.
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# File 'lib/libclimate/climate.rb', line 357 def program_name name = @program_name if defined?(Colcon) && @stdout.tty? name = "#{::Colcon::Decorations::Bold}#{name}#{::Colcon::Decorations::Unbold}" end name end |
#stderr ⇒ ::IO
Returns The output stream for contingent output; defaults to $stderr.
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# File 'lib/libclimate/climate.rb', line 372 def stderr @stderr end |
#stdout ⇒ ::IO
Returns The output stream for normative output; defaults to $stdout.
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# File 'lib/libclimate/climate.rb', line 370 def stdout @stdout end |
#usage_values ⇒ ::String
Returns Optional string to describe the program values, eg <xyz “[ { <<directory> | <file> } ]”.
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# File 'lib/libclimate/climate.rb', line 380 def usage_values @usage_values end |
#value_names ⇒ ::Array
Returns Zero-based array of names for values to be used when that value is not present (according to the :constrain_values
attribute).
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# File 'lib/libclimate/climate.rb', line 384 def value_names @value_names end |
#version ⇒ ::String, ::Array
Returns A version string or an array of integers representing the version component(s).
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# File 'lib/libclimate/climate.rb', line 386 def version @version end |
Instance Method Details
#abort(message, options = {}) ⇒ Object
Calls abort() with the given message prefixed by the program_name
Signature
-
Parameters:
message
-
The message string
options
-
An option hash, containing any of the following options
-
Options:
:stream
-
optional The output stream to use. Defaults to the value of the attribute
stderr
.
:program_name
-
optional Uses the given value rather than the
program_name
attribute; does not prefix if the empty string
:exit
-
optional The exit code. Defaults to 1. Does not exit if
nil
specified.
-
Return: The combined message string, if
exit()
not called.
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# File 'lib/libclimate/climate.rb', line 695 def abort , ={} prog_name = [:program_name] prog_name ||= program_name prog_name ||= '' stream = [:stream] stream ||= stderr stream ||= $stderr exit_code = .has_key?(:exit) ? [:exit] : 1 if prog_name.empty? msg = else msg = "#{prog_name}: #{}" end stream.puts msg exit(exit_code) if exit_code msg end |
#add_alias(name_or_alias, *aliases) ⇒ Object
Adds an alias to aliases
Signature
-
Parameters
name_or_alias
-
The flag/option name or the valued option
aliases
-
One or more aliases
Examples
Alias(es) of a flag (single statement)
climate.add_flag(‘–mark-missing’, alias: ‘-x’)
climate.add_flag(‘–absolute-path’, aliases: [ ‘-abs’, ‘-p’ ])
Alias(es) of a flag (multiple statements)
climate.add_flag(‘–mark-missing’) climate.add_alias(‘–mark-missing’, ‘-x’)
climate.add_flag(‘–absolute-path’) climate.add_alias(‘–absolute-path’, ‘-abs’, ‘-p’)
Alias(es) of an option (single statement)
climate.add_option(‘–add-patterns’, alias: ‘-p’)
Alias(es) of an option (multiple statements)
climate.add_option(‘–add-patterns’) climate.add_alias(‘–add-patterns’, ‘-p’)
Alias of a valued option (which has to be multiple statements)
climate.add_option(‘–verbosity’) climate.add_alias(‘–verbosity=succinct’, ‘-s’) climate.add_alias(‘–verbosity=verbose’, ‘-v’)
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# File 'lib/libclimate/climate.rb', line 815 def add_alias(name_or_alias, *aliases) check_parameter name_or_alias, 'name_or_alias', allow_nil: false, types: [ ::String, ::Symbol, ::CLASP::Flag, ::CLASP::Option ] raise ArgumentError, "must supply at least one alias" if aliases.empty? case name_or_alias when ::CLASP::Flag self.aliases << name_or_alias when ::CLASP::Option self.aliases << name_or_alias else self.aliases << CLASP.Alias(name_or_alias, aliases: aliases) end end |
#add_flag(name_or_flag, options = {}, &block) ⇒ Object
Adds a flag to aliases
Signature
-
Parameters
name_or_flag
-
The flag name or instance of CLASP::Flag
options
-
An options hash, containing any of the following options.
-
Options
:help
:alias
:aliases
:extras
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# File 'lib/libclimate/climate.rb', line 736 def add_flag(name_or_flag, ={}, &block) check_parameter name_or_flag, 'name_or_flag', allow_nil: false, types: [ ::String, ::Symbol, ::CLASP::Flag ] if ::CLASP::Flag === name_or_flag aliases << name_or_flag else aliases << CLASP.Flag(name_or_flag, **, &block) end end |
#add_option(name_or_option, options = {}, &block) ⇒ Object
Adds an option to aliases
Signature
-
Parameters
name_or_option
-
The option name or instance of CLASP::Option
options
-
An options hash, containing any of the following options.
-
Options
:alias
:aliases
:help
:values_range
:default_value
:extras
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# File 'lib/libclimate/climate.rb', line 764 def add_option(name_or_option, ={}, &block) check_parameter name_or_option, 'name_or_option', allow_nil: false, types: [ ::String, ::Symbol, ::CLASP::Option ] if ::CLASP::Option === name_or_option aliases << name_or_option else aliases << CLASP.Option(name_or_option, **, &block) end end |
#run(argv = ARGV) ⇒ Object
Executes the prepared Climate instance
Signature
-
Parameters:
argv
-
The array of arguments; defaults to
ARGV
-
Returns: an instance of a type derived from
::Hash
with the additional attributesflags
,options
,values
, andargv
.
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# File 'lib/libclimate/climate.rb', line 399 def run argv = ARGV raise ArgumentError, "argv may not be nil" if argv.nil? arguments = CLASP::Arguments.new argv, aliases flags = arguments.flags = arguments. values = arguments.values.to_a results = { flags: { given: flags, handled: [], unhandled: [], unknown: [], }, options: { given: , handled: [], unhandled: [], unknown: [], }, values: values, missing_option_aliases: [], } flags.each do |f| al = aliases.detect do |a| a.kind_of?(::CLASP::Flag) && f.name == a.name end if al selector = :unhandled # see if it has an :action attribute (which will have been # monkey-patched to CLASP.Flag() if al.respond_to?(:action) && !al.action.nil? al.action.call(f, al) selector = :handled else ex = al.extras case ex when ::Hash if ex.has_key? :handle ex[:handle].call(f, al) selector = :handled end end end results[:flags][selector] << f else = "unrecognised flag '#{f}'; use --help for usage" if false elsif ignore_unknown ; elsif exit_on_unknown self.abort else if program_name && !program_name.empty? = "#{program_name}: #{}" end stderr.puts end results[:flags][:unknown] << f end end .each do |o| al = aliases.detect do |a| a.kind_of?(::CLASP::Option) && o.name == a.name end if al selector = :unhandled # see if it has an :action attribute (which will have been # monkey-patched to CLASP.Option() if al.respond_to?(:action) && !al.action.nil? al.action.call(o, al) selector = :handled else ex = al.extras case ex when ::Hash if ex.has_key? :handle ex[:handle].call(o, al) selector = :handled end end end results[:options][selector] << o else = "unrecognised option '#{o}'; use --help for usage" if false elsif ignore_unknown ; elsif exit_on_unknown self.abort else if program_name && !program_name.empty? = "#{program_name}: #{}" end stderr.puts end results[:options][:unknown] << o end end # now police any required options required_aliases = aliases.select do |a| a.kind_of?(::CLASP::Option) && a.required? end required_aliases = Hash[required_aliases.map { |a| [ a.name, a ] }] = Hash[results[:options][:given].map { |o| [ o.name, o ]}] required_aliases.each do |k, a| unless .has_key? k = a. if exit_on_missing self.abort else if program_name && !program_name.empty? = "#{program_name}: #{}" end stderr.puts end results[:missing_option_aliases] << a end end # now police the values values_constraint = constrain_values values_constraint = values_constraint.begin if ::Range === values_constraint && values_constraint.end == values_constraint.begin val_names = ::Array === value_names ? value_names : [] case values_constraint when nil ; when ::Integer unless values.size == values_constraint if name = val_names[values.size] = name + ' not specified; use --help for usage' else = "wrong number of values: #{values.size} given, #{values_constraint} required; use --help for usage" end if exit_on_unknown self.abort else if program_name && !program_name.empty? = "#{program_name}: #{}" end stderr.puts end end when ::Range unless values_constraint.include? values.size if name = val_names[values.size] = name + ' not specified; use --help for usage' else = "wrong number of values: #{values.size} givens, #{values_constraint.begin} - #{values_constraint.end - (values_constraint.exclude_end? ? 1 : 0)} required; use --help for usage" end if exit_on_unknown self.abort else if program_name && !program_name.empty? = "#{program_name}: #{}" end stderr.puts end end else warn "value of 'constrain_values' attribute - '#{constrain_values}' (#{constrain_values.class}) - of wrong type : must be #{::Integer}, #{::Range}, or nil" end def results.flags self[:flags] end def results. self[:options] end def results.values self[:values] end results.define_singleton_method(:argv) do argv end results end |
#set_program_name(name) ⇒ Object
- DEPRECATED
-
This method is now deprecated. Instead use
+program_name=+
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# File 'lib/libclimate/climate.rb', line 330 def set_program_name name @program_name = name end |