ePUB Optimizer

[KevinH]

Note, filesystem/path encodings in Python can differ greatly on Windows from the utf-8 standard used on Linux and Macs.

So if you are trying to convert a bytestring in Python that contains a path or partial path to full unicode you should probably decode it using sys.getfilesystemencoding() to create a full unicode string and then encode that into utf-8 for printing.

Alternatively, you can use 'replace' with decode and encode routines to prevent problems with unknown bytestrings.

See my unipath.py code here for routines for fighting this battle:

https://github.com/Sigil-Ebook/Sigil...hon/unipath.py

[Toxaris]

Thanks Kevin, I will take a look of that. As my main platform is Windows (although currently I develop on Linux for Python), I would have never catched this.

[KevinH]

Python 3.6 has a new PEP 528 and PEP 529 that changes things for paths on Windows.

Windows is hard but Python 3.6 and sys.getfilesystemencoding() will fix most of this. The real problem for paths in Python is in Linux which can theoretically use arbitrary bytes sequences with no encoding at all inside file paths when the C-locale is set by the user forcing the use of surrogateescape to smuggle/hide these non-utf-8 byte sequences into utf-8 strings. But, of course these can not be printed either!

https://www.python.org/dev/peps/pep-0528/

https://www.python.org/dev/peps/pep-0529/

[big_smile]

Hope it's okay to bump this, but I am having an issue.

I have installed the latest Sigil on my Mac. I have also installed Mono Framework from here.

However, when I run ePub optimizer, I get the following error message:

Status: failed

mono /Users/appleuser/Library/Application Support/sigil-ebook/sigil/plugins/ePUBOptimizer/ePUBOptimizer.exe /Users/appleuser/Library/Application Support/sigil-ebook/sigil/plugins/ePUBOptimizer/dummy.epub
Traceback (most recent call last):
File "/Applications/Sigil.app/Contents/plugin_launchers/python/launcher.py", line 135, in launch
self.exitcode = target_script.run(container)
File "/Users/appleuser/Library/Application Support/sigil-ebook/sigil/plugins/ePUBOptimizer/plugin.py", line 95, in run
result = OptiWrapper(*args)
File "/Users/appleuser/Library/Application Support/sigil-ebook/sigil/plugins/ePUBOptimizer/plugin.py", line 146, in OptiWrapper
process = Popen(list(args), stdout=PIPE, stderr=PIPE)
File "subprocess.py", line 947, in __init__
File "subprocess.py", line 1551, in _execute_child
FileNotFoundError: [Errno 2] No such file or directory: 'mono'
Error: [Errno 2] No such file or directory: 'mono'

I don't understand why it says no mono as I have installed the framework.

I am running Mac Os 10.13.4

[DiapDealer]

It just can't find the mono binary for some reason.

At a guess (defer to Toxaris' advice if and when he responds), I'd say mono needs to be in the Path for the plugin to find it. Was there an option for adding Mono to the Path when installing it?

[Doitsu]

@big_smile: If you've Calibre installed on your Mac, you can also use Polish Books. (It also uses cjpeg, jpegtran and optipng for lossless image compression.)

@DiapDealer: Even though I have Mono installed on my Arch Linux machine I never could get the plugin to work. Does it work on your Linux machine?

[big_smile]

Originally Posted by Doitsu

@big_smile: If you've Calibre installed on your Mac, you can also use Polish Books. (It also uses cjpeg, jpegtran and optipng for lossless image compression.)

Thanks, I'll give a try!
Does it do all the shrinking to ebooks that ePUB Optimizer does?

Originally Posted by DiapDealer

It just can't find the mono binary for some reason.

At a guess (defer to Toxaris' advice if and when he responds), I'd say mono needs to be in the Path for the plugin to find it. Was there an option for adding Mono to the Path when installing it?

No, it didn't give an option. Do you know which path it should be in? Maybe I can move it manually. Thanks for your help!

[DiapDealer]

Originally Posted by Doitsu

@DiapDealer: Even though I have Mono installed on my Arch Linux machine I never could get the plugin to work. Does it work on your Linux machine?

I've never tried. I was just giving some quick advice as to what sounded reasonable. I just sort of assumed the plugin had been vetted on a Mac.

[JSWolf]

OS X 10.13.4 will only run 64-bit software. That means that if anything in Sigil relies on 32-bit code, it won't work. So that means even Python has to be 64-bit.

[KevinH]

No, 32 bit software still runs fine in OSX with the latest update. It will just warn you that with the next major update it will not.

On OSX, python is embedded in Sigil and everything already is 64 bit and has been for years.

[Toxaris]

The plugin will not search for mono. It should be in the path so it can be called directly. Open an command prompt and just run mono to see if it is in the path. If not, you could try 'which mono' to see if you can find a path and adapt that yourself in the plugin call.

If you don't use fonts in your ePUB, Polish Ebooks will do the same.

[DiapDealer]

Originally Posted by Doitsu

@DiapDealer: Even though I have Mono installed on my Arch Linux machine I never could get the plugin to work. Does it work on your Linux machine?

I got it working, yes.

In addition to mono, you need to install the VisualBasic.Net interpreter: mono-basic from the AUR.

Make sure you run:

export TERM=xterm

before trying to build mono-basic (as per the latest comments).

After that, the plugin completed successfully. I didn't try it on anything but the simple, default empty plugin, but there were no errors. Hope that helps Arch users.

EDIT: and of course; libjpeg-turbo, optipng, and gifsicle for the image stuff

[Doitsu]

Originally Posted by DiapDealer

In addition to mono, you need to install the VisualBasic.Net interpreter: mono-basic from the AUR.

Thanks for your research! After installing mono-basic the plugin worked fine.

[fdwojo]

I apologize if you were aware of it, but I was attempting to download the latest (0.73) version of the SIGIL Plugin, but the link you showed (below) wasn't working.

Originally Posted by Toxaris

The plugin can be found here.

So, after going to your main page, I realized the the true address should have been:

http://toxaris.nl/optimizer.html

I'm going to guess that though there might have been many people who were able to figure it out like I did, you might want to actually update your post to help those who were not able to get to the correct destination?

Sorry to bother you.

Frank

[phillipgessert]

Have any macOS users used this lately? I'm having a heck of a time getting it to find mono. I installed mono via the instructions here: https://www.mono-project.com/docs/ge...d/install/mac/, which places it in /Library/Frameworks/Mono.framework. I added a symlink to it in my PATH, and it appears to work in Terminal (in that tab/autocomplete on "mono" pulls it up), but the plugin still fails for me with "Error: [Errno 2] No such file or directory: 'mono'".

I'm sure I'm either overlooking something obvious or have done something silly here, if anyone has any ideas for things I might try, I'd be very grateful.