new primitives for reading/writing files

Dependencies

• [2] C4YSIYPO reorder
• [*] 3QNOKBFM beginnings of a test harness
• [*] CUFW4EJL reorganize app.lua and its comments
• [*] HOWVSTWA a few more testable file-system operations
• [*] ED4Z6ORC cleaner API for file-system access
• [*] HKV72RZV bugfix: save modified files in save directory

Change contents

• edit in app.lua at line 291
  [5.5001]

  [2.36]
  + function App.read_file(filename)

  + return App.filesystem[filename]

  + end

  +
• edit in app.lua at line 306
  [2.288]

  [6.130]
  + function App.write_file(filename, contents)

  + App.filesystem[filename] = contents

  + return --[[status]] true

  + end

  +
• edit in app.lua at line 445
  [7.16250]

  [8.624]
  + end

  + end

  + App.read =

  + function(path)

  + if not is_absolute_path(path) then

  + return --[[status]] false, 'Please use an unambiguous absolute path.'

  + end

  + local f, err = App.open_for_reading(path)

  + if err then

  + return --[[status]] false, err
• edit in app.lua at line 456
  [8.636]

  [7.16251]
  + local contents = f:read()

  + f:close()

  + return contents
• edit in app.lua at line 470
  [7.16494]

  [7.16494]
  + App.write =

  + function(filename, contents)

  + if not is_absolute_path(path) then

  + return --[[status]] false, 'Please use an unambiguous absolute path.'

  + end

  + local f, err = App.open_for_writing(filename)

  + if err then

  + return --[[status]] false, err

  + end

  + f:write(contents)

  + f:close()

  + end