Class: YouPlot::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/youplot/parser.rb

Overview

Class for parsing command line options

Defined Under Namespace

Classes: Error

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Parser

Returns a new instance of Parser.



15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/youplot/parser.rb', line 15

def initialize
  @command = nil

  @options = Options.new(
    "\t",    # elimiter:
    false,   # transpose:
    nil,     # headers:
    false,   # pass:
    $stderr, # output:
    'xyy',   # fmt:
    false,   # progressive:
    nil,     # encoding:
    false,   # color_names:
    false    # debug:
  )

  @params = Parameters.new
end

Instance Attribute Details

#command ⇒ Object (readonly)

Returns the value of attribute command.



11
12
13
 
# File 'lib/youplot/parser.rb', line 11

def command
  @command
end

#config ⇒ Object (readonly)

Returns the value of attribute config.



11
12
13
 
# File 'lib/youplot/parser.rb', line 11

def config
  @config
end

#config_file ⇒ Object (readonly)

Returns the value of attribute config_file.



11
12
13
 
# File 'lib/youplot/parser.rb', line 11

def config_file
  @config_file
end

#main_parser ⇒ Object (readonly)

Returns the value of attribute main_parser.



11
12
13
 
# File 'lib/youplot/parser.rb', line 11

def main_parser
  @main_parser
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



11
12
13
 
# File 'lib/youplot/parser.rb', line 11

def options
  @options
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



11
12
13
 
# File 'lib/youplot/parser.rb', line 11

def params
  @params
end

#sub_parser ⇒ Object (readonly)

Returns the value of attribute sub_parser.



11
12
13
 
# File 'lib/youplot/parser.rb', line 11

def sub_parser
  @sub_parser
end

Instance Method Details

#apply_config_file ⇒ Object 



34
35
36
37
38
39
 
# File 'lib/youplot/parser.rb', line 34

def apply_config_file
  return if !config_file && find_config_file.nil?

  read_config_file
  configure
end

#config_file_candidate_paths ⇒ Object 



41
42
43
44
45
46
47
48
49
50
51
52
53
54
 
# File 'lib/youplot/parser.rb', line 41

def config_file_candidate_paths
  # keep the order of the paths
  paths = []
  paths << ENV['MYYOUPLOTRC'] if ENV['MYYOUPLOTRC']
  paths << '.youplot.yml'
  paths << '.youplotrc'
  if ENV['HOME']
    paths << File.join(ENV['HOME'], '.youplotrc')
    paths << File.join(ENV['HOME'], '.youplot.yml')
    paths << File.join(ENV['HOME'], '.config', 'youplot', 'youplotrc')
    paths << File.join(ENV['HOME'], '.config', 'youplot', 'youplot.yml')
  end
  paths
end

#configure ⇒ Object 



73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
 
# File 'lib/youplot/parser.rb', line 73

def configure
  option_members = @options.members
  param_members = @params.members
  # It would be more useful to be able to configure by plot type
  config.each do |k, v|
    k = k.to_sym
    if option_members.include?(k)
      @options[k] ||= v
    elsif param_members.include?(k)
      @params[k] ||= v
    else
      raise Error, "Unknown option/param in config file: #{k}"
    end
  end
end

#create_base_parser ⇒ Object 



89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
 
# File 'lib/youplot/parser.rb', line 89

def create_base_parser
  OptionParser.new do |parser|
    parser.program_name  = 'YouPlot'
    parser.version       = YouPlot::VERSION
    parser.summary_width = 23
    parser.on_tail('') # Add a blank line at the end
    parser.separator('')
    parser.on('Common options:')
    parser.on('-O', '--pass [FILE]', 'file to output input data to [stdout]',
              'for inserting YouPlot in the middle of Unix pipes') do |v|
      options[:pass] = v || $stdout
    end
    parser.on('-o', '--output [FILE]', 'file to output plots to [stdout]',
              'If no option is specified, plot will print to stderr') do |v|
      options[:output] = v || $stdout
    end
    parser.on('-d', '--delimiter DELIM', String, 'use DELIM instead of [TAB] for field delimiter') do |v|
      options[:delimiter] = v
    end
    parser.on('-H', '--headers', TrueClass, 'specify that the input has header row') do |v|
      options[:headers] = v
    end
    parser.on('-T', '--transpose', TrueClass, 'transpose the axes of the input data') do |v|
      options[:transpose] = v
    end
    parser.on('-t', '--title STR', String, 'print string on the top of plot') do |v|
      params.title = v
    end
    parser.on('--xlabel STR', String, 'print string on the bottom of the plot') do |v|
      params.xlabel = v
    end
    parser.on('--ylabel STR', String, 'print string on the far left of the plot') do |v|
      params.ylabel = v
    end
    parser.on('-w', '--width INT', Numeric, 'number of characters per row') do |v|
      params.width = v
    end
    parser.on('-h', '--height INT', Numeric, 'number of rows') do |v|
      params.height = v
    end
    border_options = UnicodePlot::BORDER_MAP.keys.join(', ')
    parser.on('-b', '--border STR', String, 'specify the style of the bounding box', "(#{border_options})") do |v|
      params.border = v.to_sym
    end
    parser.on('-m', '--margin INT', Numeric, 'number of spaces to the left of the plot') do |v|
      params.margin = v
    end
    parser.on('--padding INT', Numeric, 'space of the left and right of the plot') do |v|
      params.padding = v
    end
    parser.on('-c', '--color VAL', String, 'color of the drawing') do |v|
      params.color = v =~ /\A[0-9]+\z/ ? v.to_i : v.to_sym
    end
    parser.on('--[no-]labels', TrueClass, 'hide the labels') do |v|
      params.labels = v
    end
    parser.on('-p', '--progress', TrueClass, 'progressive mode [experimental]') do |v|
      options[:progressive] = v
    end
    parser.on('-C', '--color-output', TrueClass, 'colorize even if writing to a pipe') do |_v|
      UnicodePlot::IOContext.define_method(:color?) { true } # FIXME
    end
    parser.on('-M', '--monochrome', TrueClass, 'no colouring even if writing to a tty') do |_v|
      UnicodePlot::IOContext.define_method(:color?) { false } # FIXME
    end
    parser.on('--encoding STR', String, 'specify the input encoding') do |v|
      options[:encoding] = v
    end
    # Optparse adds the help option, but it doesn't show up in usage.
    # This is why you need the code below.
    parser.on('--help', 'print sub-command help menu') do
      puts parser.help
      exit if YouPlot.run_as_executable?
    end
    parser.on('--config FILE', 'specify a config file') do |v|
      @config_file = v
    end
    parser.on('--debug', TrueClass, 'print preprocessed data') do |v|
      options[:debug] = v
    end
    # yield opt if block_given?
  end
end

#create_main_parser ⇒ Object 



173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
 
# File 'lib/youplot/parser.rb', line 173

def create_main_parser
  @main_parser = create_base_parser
  main_parser.banner = \
    <<~MSG

      Program: YouPlot (Tools for plotting on the terminal)
      Version: #{YouPlot::VERSION} (using UnicodePlot #{UnicodePlot::VERSION})
      Source:  https://github.com/red-data-tools/YouPlot

      Usage:   uplot <command> [options] <in.tsv>

      Commands:
          barplot    bar           draw a horizontal barplot
          histogram  hist          draw a horizontal histogram
          lineplot   line          draw a line chart
          lineplots  lines         draw a line chart with multiple series
          scatter    s             draw a scatter plot
          density    d             draw a density plot
          boxplot    box           draw a horizontal boxplot
          count      c             draw a barplot based on the number of
                                   occurrences (slow)
          colors     color         show the list of available colors

      General options:
          --config                 print config file info
          --help                   print command specific help menu
          --version                print the version of YouPlot
    MSG

  # Help for the main parser is simple.
  # Simply show the banner above.
  main_parser.on('--help', 'print sub-command help menu') do
    show_main_help
  end

  main_parser.on('--config', 'show config file info') do
    show_config_info
  end
end

#create_sub_parser ⇒ Object 



291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
 
# File 'lib/youplot/parser.rb', line 291

def create_sub_parser
  @sub_parser = create_base_parser
  sub_parser.banner = \
    <<~MSG

      Usage: YouPlot #{command} [options] <in.tsv>

      Options for #{command}:
    MSG

  case command

  # If you type only `uplot` in the terminal.
  # Output help to standard error output.
  when nil
    show_main_help($stderr)

  # Output help to standard output.
  when :help
    show_main_help

  when :barplot, :bar
    sub_parser_add_symbol
    sub_parser_add_fmt_yx
    sub_parser_add_xscale

  when :count, :c
    sub_parser.on_head('-r', '--reverse', TrueClass, 'reverse the result of comparisons') do |v|
      options.reverse = v
    end
    sub_parser_add_symbol
    sub_parser_add_xscale

  when :histogram, :hist
    sub_parser_add_symbol
    sub_parser.on_head('--closed STR', String, 'side of the intervals to be closed [left]') do |v|
      params.closed = v
    end
    sub_parser.on_head('-n', '--nbins INT', Numeric, 'approximate number of bins') do |v|
      params.nbins = v
    end

  when :lineplot, :line, :l
    sub_parser_add_canvas
    sub_parser_add_grid
    sub_parser_add_fmt_yx
    sub_parser_add_ylim
    sub_parser_add_xlim

  when :lineplots, :lines, :ls
    sub_parser_add_canvas
    sub_parser_add_grid
    sub_parser_add_fmt_xyxy
    sub_parser_add_ylim
    sub_parser_add_xlim

  when :scatter, :s
    sub_parser_add_canvas
    sub_parser_add_grid
    sub_parser_add_fmt_xyxy
    sub_parser_add_ylim
    sub_parser_add_xlim

  when :density, :d
    sub_parser_add_canvas
    sub_parser_add_grid
    sub_parser_add_fmt_xyxy
    sub_parser_add_ylim
    sub_parser_add_xlim

  when :boxplot, :box
    sub_parser_add_xlim

  when :colors, :color, :colours, :colour
    sub_parser.on_head('-n', '--names', TrueClass, 'show color names only') do |v|
      options[:color_names] = v
    end

  # Currently it simply displays the configuration file,
  # but in the future this may be changed to open a text editor like Vim
  # to edit the configuration file.
  when :config
    show_config_info

  else
    error_message = "YouPlot: unrecognized command '#{command}'"
    raise Error, error_message unless YouPlot.run_as_executable?

    warn error_message
    exit 1

  end
end

#find_config_file ⇒ Object 



56
57
58
59
60
61
62
63
64
65
66
 
# File 'lib/youplot/parser.rb', line 56

def find_config_file
  config_file_candidate_paths.each do |file|
    path = File.expand_path(file)
    next unless File.exist?(path)

    @config_file = path
    ENV['MYYOUPLOTRC'] = path
    return @config_file
  end
  nil
end

#parse_options(argv = ARGV) ⇒ Object 



385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
 
# File 'lib/youplot/parser.rb', line 385

def parse_options(argv = ARGV)
  begin
    create_main_parser.order!(argv)
  rescue OptionParser::ParseError => e
    warn "YouPlot: #{e.message}"
    exit 1 if YouPlot.run_as_executable?
  end

  @command = argv.shift&.to_sym

  begin
    create_sub_parser&.parse!(argv)
  rescue OptionParser::ParseError => e
    warn "YouPlot: #{e.message}"
    exit 1 if YouPlot.run_as_executable?
  end

  begin
    apply_config_file
  rescue StandardError => e
    warn "YouPlot: #{e.message}"
    exit 1 if YouPlot.run_as_executable?
  end
end

#read_config_file ⇒ Object 



68
69
70
71
 
# File 'lib/youplot/parser.rb', line 68

def read_config_file
  require 'yaml'
  @config = YAML.load_file(config_file)
end

#show_config_info ⇒ Object 



219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
 
# File 'lib/youplot/parser.rb', line 219

def show_config_info
  if ENV['MYYOUPLOTRC']
    puts "config file : #{ENV['MYYOUPLOTRC']}"
    puts config.inspect
  else
    puts <<~EOS
      Configuration file not found.
      It should be a YAML file, like this example:
        width : 40
        height : 20
      By default, YouPlot will look for the configuration file in these locations:
      #{config_file_candidate_paths.map { |s| '  ' + s }.join("\n")}
      If you have the file elsewhere, you can specify its location with the `MYYOUPLOTRC` environment variable.
    EOS
  end
  exit if YouPlot.run_as_executable?
end

#show_main_help(out = $stdout) ⇒ Object 



213
214
215
216
217
 
# File 'lib/youplot/parser.rb', line 213

def show_main_help(out = $stdout)
  out.puts main_parser.banner
  out.puts
  exit if YouPlot.run_as_executable?
end

#sub_parser_add_canvas ⇒ Object 



250
251
252
253
254
255
 
# File 'lib/youplot/parser.rb', line 250

def sub_parser_add_canvas
  canvas_types = UnicodePlot::Canvas::CANVAS_CLASS_MAP.keys.join(', ')
  sub_parser.on_head('--canvas STR', String, 'type of canvas', "(#{canvas_types})") do |v|
    params.canvas = v.to_sym
  end
end

#sub_parser_add_fmt_xyxy ⇒ Object 



275
276
277
278
279
280
281
 
# File 'lib/youplot/parser.rb', line 275

def sub_parser_add_fmt_xyxy
  sub_parser.on_head('--fmt STR', String,
                     'xyxy : header is like x1, y1, x2, y2, x3, y3...',
                     'xyy  : header is like x, y1, y2, y2, y3...') do |v|
    options[:fmt] = v
  end
end

#sub_parser_add_fmt_yx ⇒ Object 



283
284
285
286
287
288
289
 
# File 'lib/youplot/parser.rb', line 283

def sub_parser_add_fmt_yx
  sub_parser.on_head('--fmt STR', String,
                     'xy : header is like x, y...',
                     'yx : header is like y, x...') do |v|
    options[:fmt] = v
  end
end

#sub_parser_add_grid ⇒ Object 



269
270
271
272
273
 
# File 'lib/youplot/parser.rb', line 269

def sub_parser_add_grid
  sub_parser.on_head('--[no-]grid', TrueClass, 'draws grid-lines at the origin') do |v|
    params.grid = v
  end
end

#sub_parser_add_symbol ⇒ Object 



237
238
239
240
241
 
# File 'lib/youplot/parser.rb', line 237

def sub_parser_add_symbol
  sub_parser.on_head('--symbol STR', String, 'character to be used to plot the bars') do |v|
    params.symbol = v
  end
end

#sub_parser_add_xlim ⇒ Object 



257
258
259
260
261
 
# File 'lib/youplot/parser.rb', line 257

def sub_parser_add_xlim
  sub_parser.on_head('--xlim FLOAT,FLOAT', Array, 'plotting range for the x coordinate') do |v|
    params.xlim = v.map(&:to_f)
  end
end

#sub_parser_add_xscale ⇒ Object 



243
244
245
246
247
248
 
# File 'lib/youplot/parser.rb', line 243

def sub_parser_add_xscale
  xscale_options = UnicodePlot::ValueTransformer::PREDEFINED_TRANSFORM_FUNCTIONS.keys.join(', ')
  sub_parser.on_head('--xscale STR', String, "axis scaling (#{xscale_options})") do |v|
    params.xscale = v.to_sym
  end
end

#sub_parser_add_ylim ⇒ Object 



263
264
265
266
267
 
# File 'lib/youplot/parser.rb', line 263

def sub_parser_add_ylim
  sub_parser.on_head('--ylim FLOAT,FLOAT', Array, 'plotting range for the y coordinate') do |v|
    params.ylim = v.map(&:to_f)
  end
end