| Class | Haml::Exec::Generic |
| In: |
lib/haml/exec.rb
|
| Parent: | Object |
An abstract class that encapsulates the executable code for all three executables.
| COLORS | = | { :red => 31, :green => 32, :yellow => 33 } |
@param args [Array<String>] The command-line arguments
# File lib/haml/exec.rb, line 11
11: def initialize(args)
12: @args = args
13: @options = {}
14: end
Parses the command-line arguments and runs the executable. This does not handle exceptions or exit the program.
@see parse!
# File lib/haml/exec.rb, line 37
37: def parse
38: @opts = OptionParser.new(&method(:set_opts))
39: @opts.parse!(@args)
40:
41: process_result
42:
43: @options
44: end
Parses the command-line arguments and runs the executable. Calls `Kernel#exit` at the end, so it never returns.
@see parse
# File lib/haml/exec.rb, line 20
20: def parse!
21: begin
22: parse
23: rescue Exception => e
24: raise e if @options[:trace] || e.is_a?(SystemExit)
25:
26: $stderr.puts "#{e.class}: #{e.message}"
27: $stderr.puts " Use --trace for backtrace."
28: exit 1
29: end
30: exit 0
31: end
@return [String] A description of the executable
# File lib/haml/exec.rb, line 47
47: def to_s
48: @opts.to_s
49: end
Wraps the given string in terminal escapes causing it to have the given color. If terminal esapes aren‘t supported on this platform, just returns the string instead.
@param color [Symbol] The name of the color to use.
Can be `:red`, `:green`, or `:yellow`.
@param str [String] The string to wrap in the given color. @return [String] The wrapped string.
# File lib/haml/exec.rb, line 141
141: def color(color, str)
142: raise "[BUG] Unrecognized color #{color}" unless COLORS[color]
143:
144: # Almost any real Unix terminal will support color,
145: # so we just filter for Windows terms (which don't set TERM)
146: # and not-real terminals, which aren't ttys.
147: return str if ENV["TERM"].nil? || ENV["TERM"].empty? || !STDOUT.tty?
148: return "\e[#{COLORS[color]}m#{str}\e[0m"
149: end
Finds the line of the source template on which an exception was raised.
@param exception [Exception] The exception @return [String] The line number
# File lib/haml/exec.rb, line 58
58: def get_line(exception)
59: # SyntaxErrors have weird line reporting
60: # when there's trailing whitespace,
61: # which there is for Haml documents.
62: return (exception.message.scan(/:(\d+)/).first || ["??"]).first if exception.is_a?(::SyntaxError)
63: (exception.backtrace[0].scan(/:(\d+)/).first || ["??"]).first
64: end
Processes the options set by the command-line arguments. In particular, sets `@options[:input]` and `@options[:output]` to appropriate IO streams.
This is meant to be overridden by subclasses so they can run their respective programs.
# File lib/haml/exec.rb, line 105
105: def process_result
106: input, output = @options[:input], @options[:output]
107: args = @args.dup
108: input ||=
109: begin
110: filename = args.shift
111: @options[:filename] = filename
112: open_file(filename) || $stdin
113: end
114: output ||= open_file(args.shift, 'w') || $stdout
115:
116: @options[:input], @options[:output] = input, output
117: end
Prints a status message about performing the given action, colored using the given color (via terminal escapes) if possible.
@param name [to_s] A short name for the action being performed.
Shouldn't be longer than 11 characters.
@param color [Symbol] The name of the color to use for this action.
Can be `:red`, `:green`, or `:yellow`.
# File lib/haml/exec.rb, line 128
128: def puts_action(name, color, arg)
129: printf color(color, "%11s %s\n"), name, arg
130: end
Tells optparse how to parse the arguments available for all executables.
This is meant to be overridden by subclasses so they can add their own options.
@param opts [OptionParser]
# File lib/haml/exec.rb, line 73
73: def set_opts(opts)
74: opts.on('-s', '--stdin', :NONE, 'Read input from standard input instead of an input file') do
75: @options[:input] = $stdin
76: end
77:
78: opts.on('--trace', :NONE, 'Show a full traceback on error') do
79: @options[:trace] = true
80: end
81:
82: if RbConfig::CONFIG['host_os'] =~ /mswin|windows/i
83: opts.on('--unix-newlines', 'Use Unix-style newlines in written files.') do
84: @options[:unix_newlines] = true
85: end
86: end
87:
88: opts.on_tail("-?", "-h", "--help", "Show this message") do
89: puts opts
90: exit
91: end
92:
93: opts.on_tail("-v", "--version", "Print version") do
94: puts("Haml/Sass #{::Haml.version[:string]}")
95: exit
96: end
97: end