summaryrefslogtreecommitdiff
path: root/src/lua-script/script.lua
blob: c6c2ecb396c85674c19cbd2c3265a40c8b210b8a (plain)
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
return function(config)
   local fmt = string.format

   --------------------------------
   --
   -- basics
   --
   --------------------------------

   function Set(array, transform)
      if type(array) ~= 'table' then return nil end

      local transform = transform or function(x) return x end

      local set = {}
      for _, element in ipairs(array) do
	 set[transform(element)] = true
      end
      return set
   end

   function set_tostring(set)
      local str = '[empty]'
      for element in pairs(set) do
	 if str == '[empty]' then
	    str = tostring(element)
	 else
	    str = str .. '; '.. tostring(element)
	 end
      end

      return str
   end


   function add_end_slash(str)
      if type(str) ~= 'string' then return nil end
      if string.match(str, '/$') then return str end
      return str .. '/'
   end


   function strip_end_slash(str)
      if string.match(str, '/$') then return string.sub(str, 1, #str-1) end
      return str
   end


   function load_layouts(directory, parent, layouts)
      local directory = add_end_slash(directory) or ''
      local parent = parent or ''
      local layouts = layouts or {}

      local fullpath = parent..directory
      local dirs, files = argent.scanDirectory(argent.config.layout_directory..fullpath)

      for _, file in ipairs(files) do
	 if string.match(file, '%.lua$') then
	    local basename = string.gsub(file, '%.lua$', '')
	    local id = string.gsub(fullpath..basename, '/', '.')
	    argent.log('debug', fmt('loading layout %q', id))
	    success, result = pcall(loadfile(argent.config.layout_directory..fullpath..file), 0, 1)
	    if not success then
	       argent.log('error', result)
	       argent.log('warn', fmt('layout %q will not be available', id))
	    else
	       layouts[id] = result
	    end
	 end
      end

      for _, dir in ipairs(dirs) do
	 if dir ~= '.' and dir ~= '..' then
	    argent.log('debug', fmt('loading layouts from %q', parent..directory))
	    load_layouts(dir, parent..directory, layouts)
	 end
      end

      return layouts
   end


   function setup(config)
      argent.log('debug', 'begin setup')
      
      argent.config = {
	 site_directory = add_end_slash(config.site_directory) or 'site/',
	 output_directory = add_end_slash(config.output_directory) or 'public/',
	 layout_directory = add_end_slash(config.layout_directory) or nil,
	 plugin_directory = add_end_slash(config.plugin_directory) or nil,
	 exclude = Set(config.exclude, strip_end_slash) or {},
	 include = Set(config.include, strip_end_slash) or {},
	 keep = Set(config.keep, strip_end_slash) or {},
	 noprocess = Set(config.noprocess, strip_end_slash) or {},
	 rss_include = Set(config.rss_include, strip_end_slash) or {},
      }

      argent.log('info', fmt('site directory: %s', argent.config.site_directory))
      argent.log('info', fmt('output directory: %s', argent.config.output_directory))
      argent.log('info', fmt('layout directory: %s', tostring(argent.config.layout_directory)))
      argent.log('info', fmt('plugin directory: %s', tostring(argent.config.plugin_directory)))

      argent.log('info', 'exclusions: '..set_tostring(argent.config.exclude))
      argent.log('info', 'inclusions: '..set_tostring(argent.config.include))
      argent.log('info', 'files to keep: '..set_tostring(argent.config.keep))
      argent.log('info', 'noprocess: '..set_tostring(argent.config.noprocess))
      argent.log('info', 'rss files: '..set_tostring(argent.config.rss_include))

      if argent.config.layout_directory then
	 argent.layouts = load_layouts()
      else
	 argent.layouts = {}
      end
      argent.log('info', fmt('available layouts: %s', set_tostring(argent.layouts)))
      
      if argent.config.plugin_directory then
	 package.path =
	    add_end_slash(argent.currentWorkingDirectory())
	    ..argent.config.plugin_directory..'?.lua;'..package.path
      end
      argent.log('debug', 'end setup')
   end


   function is_dotfile(filename)
      if string.match(filename, '^%.') then return true end
      return false
   end


   function directory_exists(directory, parent)
      local directory = directory or ''
      local parent = parent or ''
      local dirs = argent.scanDirectory(argent.config.output_directory..parent)
      for _, dir in ipairs(dirs) do
	 if strip_end_slash(directory) == dir then return true end
      end
      return false
   end


   function output_directory_exists()
      local dirs = argent.scanDirectory('./')
      for _, dir in ipairs(dirs) do
	 if add_end_slash(dir) == argent.config.output_directory then
	    return true
	 end
      end
      return false
   end


   --------------------------------
   --
   -- obliterating
   --
   --------------------------------

   function obliterate_file(file, parent)
      if argent.config.keep[file] then
	 argent.log('debug', fmt('retaining file %q', parent..file))
	 return true
      end

      argent.log('debug', fmt('removing file %q', parent..file))
      os.remove(argent.config.output_directory..parent..file)
      return false
   end


   function obliterate_dir(dir, parent)
      if argent.config.keep[strip_end_slash(dir)] then
	 argent.log('debug', fmt('retaining directory %q', parent..dir))
	 return true
      end

      argent.log('debug', fmt('obliterating files in %q', parent..dir))
      return obliterate_directory(dir, parent)
   end


   function obliterate_directory(dirname, parent)
      local dirname = add_end_slash(dirname) or ''
      local parent = parent or ''

      if argent.config.keep[dirname] then return true end

      local keep_self = (dirname == '')

      local dirs, files = argent.scanDirectory(argent.config.output_directory..parent..dirname)
      for _, file in ipairs(files) do
	 keep_self = obliterate_file(file, parent..dirname) or keep_self
      end
      for _, dir in ipairs(dirs) do
	 if dir ~= '.' and dir ~= '..' then
	    keep_self = obliterate_dir(dir, parent..dirname) or keep_self
	 end
      end

      if not keep_self then
	 os.remove(argent.config.output_directory..parent..dirname)
	 return false
      else
	 return true
      end
   end


   --------------------------------
   --
   -- processing
   --
   --------------------------------

   function should_include(filename, parent)
      for pattern in pairs(argent.config.include) do
	 if string.match(filename, pattern) or string.match(parent..filename, pattern) then
	    return true
	 end
      end
      return false
   end

   function should_ignore(filename, parent)
      if is_dotfile(filename) and not should_include(filename, parent) then
	 return false
      end

      for pattern in pairs(argent.config.exclude) do
	 if string.match(filename, pattern)
	    or string.match(parent..filename, pattern) then
	    return true
	 end
      end

      return false
   end

   function process_file(filename, parent)
      if should_ignore(filename, parent) then
	 argent.log('debug', fmt('will not process file %q', parent..filename))
	 return
      end

      if string.match(filename, '%.lua$') and not argent.config.noprocess[filename] then
	 argent.log('debug', fmt('processing %q as lua file', parent..filename))
	 process_lua_file(filename, parent)
      else
	 argent.log('debug', fmt('processing %q as regular file', parent..filename))
	 argent.copyFile(
	    argent.config.site_directory..parent..filename,
	    argent.config.output_directory..parent..filename
	 )
      end
   end


   function process_lua_file(filename, parent)
      local success, result = pcall(loadfile(argent.config.site_directory..parent..filename))
      if not success then
	 print('WARNING: '..result)
	 return
      end

      if not type(result) == 'table' then
	 argent.log('error', fmt('%q returned %q instead of %q', filename, type(result), 'table'))
	 argent.log('warn', fmt('%q will not result in file output!', filename))
	 return
      end

      local html
      if result.html then
	 html = result.html
      elseif result.markdown then
	 html = argent.markdown(result.markdown)
      else
	 argent.log('error', fmt('%q did not specify any content!', filename))
	 argent.log('warn', fmt('%q will not result in file output!', filename))
	 return
      end

      if not result.title then
	 result.title = string.gsub(filename, '%.lua$', '')
	 argent.log('warn', fmt('%q did not specify a title; using default title of %q',
				filename, result.title))
      end

      local layout = function(html, tbl) return html end
      if result.layout then
	 if not argent.layouts[result.layout] then
	    argent.log('error', fmt('%q requested nonexistent layout %q', filename, result.layout))
	    argent.log('warn', fmt('%q will not result in file output!', filename))
	    return
	 else
	    layout = argent.layouts[result.layout]
	 end
      else -- no layout specified
	 argent.log('warn', fmt(
		       '%q did not specify a layout; output will be naked content!',
		       filename))
      end

      local output_data = layout(html, result)
      local output_name = string.gsub(filename, '%.lua$', '.html')
      local output_file = io.open(argent.config.output_directory..parent..output_name, 'w')
      output_file:write(output_data)
      output_file:close()
   end


   function process_dir(directory, parent)
      if should_ignore(directory, parent) then
	 argent.log('debug', fmt('will not process directory %q', parent..directory))
	 return
      end

      if not directory_exists(directory, parent) then
	 argent.createDirectory(argent.config.output_directory..parent..directory)
      end
      process_directory(directory, parent)
   end


   function process_directory(directory, parent)
      local directory = add_end_slash(directory) or ''
      local parent = add_end_slash(parent) or ''
      local dirs, files = argent.scanDirectory(argent.config.site_directory..parent..directory)
      for _, file in ipairs(files) do
	 process_file(file, parent..directory)
      end

      for _, dir in ipairs(dirs) do
	 if dir ~= '.' and dir ~= '..' then
	    process_dir(dir, parent..directory)
	 end
      end
   end


   --------------------------------
   --
   -- putting it all together
   --
   --------------------------------

   setup(config)
   if not output_directory_exists() then
      argent.createDirectory(argent.config.output_directory)
   else
      obliterate_directory()
   end
   process_directory()
end