cssutils

[jackie_w]

Did something bad happen to the cssutils module?

I just installed calibre v3.37 and now every plugin I use which manipulates CSS is inaccessible.

I tried to revert to my older run-from-source calibre, which I last updated about a week ago. Unfortunately this doesn't work either. This is the error message I got when I tried to start up my run-from-source version

calibre, version 3.36.0
ERROR: Startup error: There was an error during calibre startup. Parts of calibre may not function. Click Show details to learn more.

Traceback (most recent call last):
  File "D:\JS_git_devel\cal\src\calibre\gui2\main.py", line 289, in initialize_db_stage2
  File "D:\JS_git_devel\cal\src\calibre\gui2\main.py", line 228, in start_gui
  File "D:\JS_git_devel\cal\src\calibre\gui2\ui.py", line 157, in __init__
  File "D:\JS_git_devel\cal\src\calibre\gui2\ui.py", line 171, in init_iaction
  File "D:\JS_git_devel\cal\src\calibre\customize\__init__.py", line 612, in load_actual_plugin
  File "importlib\__init__.py", line 37, in import_module
  File "D:\JS_git_devel\cal\src\calibre\gui2\actions\catalog.py", line 13, in <module>
  File "D:\JS_git_devel\cal\src\calibre\gui2\tools.py", line 16, in <module>
  File "D:\JS_git_devel\cal\src\calibre\gui2\convert\single.py", line 18, in <module>
  File "D:\JS_git_devel\cal\src\calibre\gui2\convert\look_and_feel.py", line 13, in <module>
  File "D:\JS_git_devel\cal\src\calibre\gui2\convert\look_and_feel_ui.py", line 290, in <module>
  File "D:\JS_git_devel\cal\src\calibre\gui2\css_transform_rules.py", line 13, in <module>
  File "D:\JS_git_devel\cal\src\calibre\ebooks\css_transform_rules.py", line 11, in <module>
ImportError: No module named cssutils.css

[jhowell]

Perhaps it has to do with this change: Switch from cssutils to css-parser.

[jackie_w]

Originally Posted by jhowell

Perhaps it has to do with this change: Switch from cssutils to css-parser.

Well spotted! Thank you for that. At least I know it isn't something I did by accident. Did I miss some sort of announcement?

I think I'll wait for the dust to settle before setting out on a mammoth plugin editing session.

[jhowell]

Originally Posted by jackie_w

Well spotted! Thank you for that. At least I know it isn't something I did by accident. Did I miss some sort of announcement?

I only noticed because I regularly check the calibre GitHub for changes.

[kovidgoyal]

You just need to do a global search and replace for cssutils changing it to css_parser and you will be fine. Apologies, I neglected to mention this change in the changelog.

[kovidgoyal]

Oh and some background on the change: cssutils is no longer maintained so the developers of Sigil (which also uses it) and I are collaborating to maintain it as a new fork called css_parser.

[jackie_w]

Originally Posted by kovidgoyal

Oh and some background on the change: cssutils is no longer maintained so the developers of Sigil (which also uses it) and I are collaborating to maintain it as a new fork called css_parser.

Much appreciated, I don't know what I'd do without some of its functions.

Did the old owners just lose interest or is some new CSS utility on the horizon?

[kovidgoyal]

There have been multiple bugs opened against cssutils for years some even with attached patches that have not been merged. The original owners lost interest a while back, there was a new maintainer and he also lost interest a couple of years ago.

[jackie_w]

So will css_parser be maintained just for calibre/Sigil purposes or are you planning to offer a service for the rest of the world?

[kovidgoyal]

It's open source, anyone who wants to can use it. Like all the various other bits of calibre infrastructure I maintain, such as html5-parser, rapydscript, mechanize, python2, unrardll, dukpy, etc. etc.