55 lines
2.3 KiB
Crystal
55 lines
2.3 KiB
Crystal
module CliGen::Parser
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macro extended
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{% verbatim do %}
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macro define_parser
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def self.make_parser(parent_parser : OptionParser) : OptionParser
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{% puts "#{@type.name} OptionParser is being generated" %}
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{% name = @type.name.split("::").last %}
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{% var = name.downcase %}
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{% info = @type.annotation(::CliGen::CommandInfo) %}
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{% raise "ERROR : No CommandInfo annotation provided to #{@type.name}" unless info %}
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subparser = OptionParser.new do |parser|
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parser.banner = {{@type.name}}::HEADER
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{% subcommands = @type.class.methods.select(&.annotation(::CliGen::SubCommand)) %}
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{% if subcommands.size > 0 %}
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CliGen::define_section("Subcommands", parser)
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{% for subcommand in subcommands %}
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{% subcommand_anno = subcommand.annotation(::CliGen::SubCommand) %}
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parser.on({{subcommand.name.stringify}}, {{subcommand_anno[:description]}}){
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{{@type.name}}.action= {{subcommand.name.stringify}}
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}
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{% end %}
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{% end %}
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{% arguments = @type.class.methods.select(&.annotation(::CliGen::CommandArgument)) %}
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{% if arguments.size > 0 %}
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CliGen::define_section("Provide Arguments", parser)
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{% for argument in arguments %}
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{% argument_anno = argument.annotation(::CliGen::CommandArgument) %}
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{% if argument_anno[:short] == "" && argument_anno[:long] != "" %}
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parser.on({{argument_anno[:long]}}, {{argument_anno[:description]}}){|val|
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{% elsif argument_anno[:short] != "" && argument_anno[:long] == "" %}
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parser.on({{argument_anno[:short]}}, {{argument_anno[:description]}}){|val|
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{% else %}
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parser.on({{argument_anno[:short]}}, {{argument_anno[:long]}}, {{argument_anno[:description]}}){|val|
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{% end %}
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{{@type.name}}.{{argument.name}}(val)
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}
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{% end %}
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{% end %}
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define_default_flags(parser)
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end
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parent_parser.on({{var}}, {{info[:description]}}){
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ARGV.delete({{var}})
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abort {{var.id}} if ARGV.empty?
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subparser.parse
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{{@type.name}}.run
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}
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end
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end
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{% end %}
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end
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end
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