forked from binford2k/showoff
-
Notifications
You must be signed in to change notification settings - Fork 13
/
showoff_utils.rb
441 lines (385 loc) · 13.9 KB
/
showoff_utils.rb
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
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
172
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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
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
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
class ShowOffUtils
# Helper method to parse a comma separated options string and stores
# the result in a dictionrary
#
# Example:
#
# "tpl=hpi,title=Over the rainbow"
#
# will be stored as
#
# { "tpl" => "hpi", "title" => "Over the rainbow" }
def self.parse_options(option_string="")
result = {}
if option_string
option_string.split(",").each do |element|
pair = element.split("=")
result[pair[0]] = pair.size > 1 ? pair[1] : nil
end
end
result
end
def self.presentation_config_file
@presentation_config_file ||= 'showoff.json'
end
def self.presentation_config_file=(filename)
@presentation_config_file = filename
end
def self.create(dirname,create_samples,dir='one')
Dir.mkdir(dirname) if !File.exists?(dirname)
Dir.chdir(dirname) do
if create_samples
# create section
Dir.mkdir(dir)
# create markdown file
File.open("#{dir}/01_slide.md", 'w+') do |f|
f.puts make_slide("My Presentation")
f.puts make_slide("Bullet Points","bullets incremental",["first point","second point","third point"])
end
end
# create showoff.json
File.open(ShowOffUtils.presentation_config_file, 'w+') do |f|
f.puts "{ \"name\": \"My Preso\", \"sections\": [ {\"section\":\"#{dir}\"} ]}"
end
end
end
HEROKU_GEMS_FILE = '.gems'
HEROKU_BUNDLER_GEMS_FILE = 'Gemfile'
HEROKU_CONFIG_FILE = 'config.ru'
# Setup presentation to run on Heroku
#
# name - String containing heroku name
# force - boolean if .gems/Gemfile and config.ru should be overwritten if they don't exist
# password - String containing password to protect your heroku site; nil means no password protection
# use_dot_gems - boolean that, if true, indicates we should use the old, deprecated .gems file instead of Bundler
def self.heroku(name, force = false, password = nil, use_dot_gems = false)
modified_something = false
if use_dot_gems
modified_something = create_gems_file(HEROKU_GEMS_FILE,
!password.nil?,
force,
lambda{ |gem| gem })
else
modified_something = create_gems_file(HEROKU_BUNDLER_GEMS_FILE,
!password.nil?,
force,
lambda{ |gem| "gem '#{gem}'" },
lambda{ "source :rubygems" })
end
create_file_if_needed(HEROKU_CONFIG_FILE,force) do |file|
modified_something = true
file.puts 'require "showoff"'
if password.nil?
file.puts 'run ShowOff.new'
else
file.puts 'require "rack"'
file.puts 'showoff_app = ShowOff.new'
file.puts 'protected_showoff = Rack::Auth::Basic.new(showoff_app) do |username, password|'
file.puts "\tpassword == '#{password}'"
file.puts 'end'
file.puts 'run protected_showoff'
end
end
modified_something
end
# generate a static version of the site into the gh-pages branch
def self.github
ShowOff.do_static(nil)
`git add static`
sha = `git write-tree`.chomp
tree_sha = `git rev-parse #{sha}:static`.chomp
`git read-tree HEAD` # reset staging to last-commit
ghp_sha = `git rev-parse gh-pages 2>/dev/null`.chomp
extra = ghp_sha != 'gh-pages' ? "-p #{ghp_sha}" : ''
commit_sha = `echo 'static presentation' | git commit-tree #{tree_sha} #{extra}`.chomp
`git update-ref refs/heads/gh-pages #{commit_sha}`
end
# Makes a slide as a string.
# [title] title of the slide
# [classes] any "classes" to include, such as 'smaller', 'transition', etc.
# [content] slide content. Currently, if this is an array, it will make a bullet list. Otherwise
# the string value of this will be put in the slide as-is
def self.make_slide(title,classes="",content=nil)
slide = "!SLIDE #{classes}\n"
slide << "# #{title} #\n"
slide << "\n"
if content
if content.kind_of? Array
content.each { |x| slide << "* #{x.to_s}\n" }
else
slide << content.to_s
end
end
slide
end
TYPES = {
:default => lambda { |t,size,source,type| make_slide(t,"#{size} #{type}",source) },
'title' => lambda { |t,size,dontcare| make_slide(t,size) },
'bullets' => lambda { |t,size,dontcare| make_slide(t,"#{size} bullets incremental",["bullets","go","here"])},
'smbullets' => lambda { |t,size,dontcare| make_slide(t,"#{size} smbullets incremental",["bullets","go","here","and","here"])},
'code' => lambda { |t,size,src| make_slide(t,size,blank?(src) ? " @@@ Ruby\n code_here()" : src) },
'commandline' => lambda { |t,size,dontcare| make_slide(t,"#{size} commandline"," $ command here\n output here")},
'full-page' => lambda { |t,size,dontcare| make_slide(t,"#{size} full-page","![Image Description](image/ref.png)")},
}
# Adds a new slide to a given dir, giving it a number such that it falls after all slides
# in that dir.
# Options are:
# [:dir] - dir where we put the slide (if omitted, slide is output to $stdout)
# [:name] - name of the file, without the number prefix. (if omitted, a default is used)
# [:title] - title in the slide. If not specified the source file name is
# used. If THAT is not specified, uses the value of +:name+. If THAT is not
# specified, a suitable default is used
# [:code] - path to a source file to use as content (force :type to be 'code')
# [:number] - true if numbering should be done, false if not
# [:type] - the type of slide to create
def self.add_slide(options)
add_new_dir(options[:dir]) if options[:dir] && !File.exists?(options[:dir])
options[:type] = 'code' if options[:code]
title = determine_title(options[:title],options[:name],options[:code])
options[:name] = 'new_slide' if !options[:name]
size,source = determine_size_and_source(options[:code])
type = options[:type] || :default
slide = TYPES[type].call(title,size,source)
if options[:dir]
filename = determine_filename(options[:dir],options[:name],options[:number])
write_file(filename,slide)
else
puts slide
puts
end
end
# Adds the given directory to this presentation, appending it to
# the end of showoff.json as well
def self.add_new_dir(dir)
puts "Creating #{dir}..."
Dir.mkdir dir
showoff_json = JSON.parse(File.read(ShowOffUtils.presentation_config_file))
showoff_json["section"] = dir
File.open(ShowOffUtils.presentation_config_file,'w') do |file|
file.puts JSON.generate(showoff_json)
end
puts "#{ShowOffUtils.presentation_config_file} updated"
end
def self.blank?(string)
string.nil? || string.strip.length == 0
end
def self.determine_size_and_source(code)
size = ""
source = ""
if code
source,lines,width = read_code(code)
size = adjust_size(lines,width)
end
[size,source]
end
def self.write_file(filename,slide)
File.open(filename,'w') do |file|
file.puts slide
end
puts "Wrote #{filename}"
end
def self.determine_filename(slide_dir,slide_name,number)
filename = "#{slide_dir}/#{slide_name}.md"
if number
max = find_next_number(slide_dir)
filename = "#{slide_dir}/#{max}_#{slide_name}.md"
end
filename
end
# Finds the next number in the given dir to
# name a slide as the last slide in the dir.
def self.find_next_number(slide_dir)
max = 0
Dir.open(slide_dir).each do |file|
if file =~ /(\d+).*\.md/
num = $1.to_i
max = num if num > max
end
end
max += 1
max = "0#{max}" if max < 10
max
end
def self.determine_title(title,slide_name,code)
if blank?(title)
title = slide_name
title = File.basename(code) if code
end
title = "Title here" if blank?(title)
title
end
# Determines a more optimal value for the size (e.g. small vs. smaller)
# based upon the size of the code being formatted.
def self.adjust_size(lines,width)
size = ""
# These values determined empircally
size = "small" if width > 50
size = "small" if lines > 15
size = "smaller" if width > 57
size = "smaller" if lines > 19
puts "warning, some lines are too long and the code may be cut off" if width > 65
puts "warning, your code is too long and the code may be cut off" if lines > 23
size
end
# Reads the code from the source file, returning
# the code, indented for markdown, as well as the number of lines
# and the width of the largest line
def self.read_code(source_file)
code = " @@@ #{lang(source_file)}\n"
lines = 0
width = 0
File.open(source_file) do |code_file|
code_file.readlines.each do |line|
code += " #{line}"
lines += 1
width = line.length if line.length > width
end
end
[code,lines,width]
end
def self.showoff_sections(dir,logger)
index = File.join(dir, ShowOffUtils.presentation_config_file)
sections = nil
if File.exists?(index)
data = JSON.parse(File.read(index))
logger.debug data
if data.is_a?(Hash)
sections = data['sections']
else
sections = data
end
sections = sections.map do |s|
if s.is_a? Hash
s['section']
else
s
end
end
else
sections = ["."] # if there's no showoff.json file, make a boring one
end
sections
end
def self.showoff_title(dir = '.')
get_config_option(dir, 'name', "Presentation")
end
def self.pause_msg(dir = '.')
get_config_option(dir, 'pause_msg', '')
end
def self.showoff_pdf_options(dir = '.')
opts = get_config_option(dir, 'pdf_options', {:page_size => 'Letter', :orientation => 'Landscape'})
Hash[opts.map {|k, v| [k.to_sym, v]}] # keys must be symbols
end
def self.showoff_markdown(dir = ".")
get_config_option(dir, "markdown", "redcarpet")
end
def self.showoff_renderer_options(dir = '.', default_options = {})
opts = get_config_option(dir, showoff_markdown(dir))
Hash[opts.map {|k, v| [k.to_sym, v]}] if opts # keys must be symbols
end
def self.get_config_option(dir, option, default = nil)
index = File.join(dir, ShowOffUtils.presentation_config_file)
if File.exists?(index)
data = JSON.parse(File.read(index))
if data.is_a?(Hash)
if default.is_a?(Hash)
default.merge(data[option] || {})
else
data[option] || default
end
end
else
default
end
end
EXTENSIONS = {
'pl' => 'perl',
'rb' => 'ruby',
'erl' => 'erlang',
# so not exhaustive, but probably good enough for now
}
def self.lang(source_file)
ext = File.extname(source_file).gsub(/^\./,'')
EXTENSIONS[ext] || ext
end
REQUIRED_GEMS = %w(redcarpet showoff heroku)
# Creates the file that lists the gems for heroku
#
# filename - String name of the file
# password - Boolean to indicate if we are setting a password
# force - Boolean to indicate if we should overwrite the existing file
# formatter - Proc/lambda that takes 1 argument, the gem name, and formats it for the file
# This is so we can support both the old .gems and the new bundler Gemfile
# header - Proc/lambda that creates any header information in the file
#
# Returns a boolean indicating that we had to create the file or not.
def self.create_gems_file(filename,password,force,formatter,header=nil)
create_file_if_needed(filename,force) do |file|
file.puts header.call unless header.nil?
REQUIRED_GEMS.each { |gem| file.puts formatter.call(gem) }
file.puts formatter.call("rack") if password
end
end
# Creates the given filename if it doesn't exist or if force is true
#
# filename - String name of the file to create
# force - if true, the file will always be created, if false, only create
# if it's not there
# block - takes a block that will be given the file handle to write
# data into the file IF it's being created
#
# Examples
#
# create_file_if_needed("config.ru",false) do |file|
# file.puts "require 'showoff'"
# file.puts "run ShowOff.new"
# end
#
# Returns true if the file was created
def self.create_file_if_needed(filename,force)
if !File.exists?(filename) || force
File.open(filename, 'w+') do |f|
yield f
end
true
else
puts "#{filename} exists; not overwriting (see showoff help heroku)"
false
end
end
end
# Load the configuration for the markdown engine from the showoff.json
# file
module MarkdownConfig
def self.setup(dir_name)
# Load markdown configuration
case ShowOffUtils.showoff_markdown(dir_name)
when 'rdiscount'
Tilt.prefer Tilt::RDiscountTemplate, "markdown"
when 'maruku'
Tilt.prefer Tilt::MarukuTemplate, "markdown"
# Now check if we can go for latex mode
require 'maruku'
require 'maruku/ext/math'
# Load maruku options
opts = ShowOffUtils.showoff_renderer_options(dir_name,
{ :use_tex => false,
:png_dir => 'images',
:html_png_url => '/file/images/'})
if opts[:use_tex]
MaRuKu::Globals[:html_math_output_mathml] = false
MaRuKu::Globals[:html_math_engine] = 'none'
MaRuKu::Globals[:html_math_output_png] = true
MaRuKu::Globals[:html_png_engine] = 'blahtex'
MaRuKu::Globals[:html_png_dir] = opts[:png_dir]
MaRuKu::Globals[:html_png_url] = opts[:html_png_url]
end
when 'bluecloth'
Tilt.prefer Tilt::BlueClothTemplate, "markdown"
when 'kramdown'
Tilt.prefer Tilt::KramdownTemplate, "markdown"
else
Tilt.prefer Tilt::RedcarpetTemplate, "markdown"
end
end
end