supporting Kindle Previewer

[darodi]

Kindlegen is gone. You should definitely consider supporting Kindle Previewer.

Originally posted by @Grauen in #371 (comment)

TODO: adapt README

[darodi]

It can be found in "Amazon Kindle Previewer 3 Folder\lib\fc\bin" too but using the Wayback Machine is the fastest way to get it since no installation is needed.

Originally posted by @HermesPasser in #371 (comment)

[innocenat]

Sorry for commenting on closed issue, but I was wondering why isn't Kindle Previewer's Kindle gen detected automatically?

It seems trivial to just add those path to kcc.py to just detect them automatically. Specifically, %LOCALAPPDATA\Amazon\Kindle Previewer 3\lib\fc\bin\ on Windows and /Applications/Kindle Previewer 3.app/Contents/lib/fc/bin/ on Mac OS. Are there anything I missed here?

[darodi]

@innocenat

Right now, KCC detects kindlegen if the directory is in the PATH Environment Variable (Windows, Linux, Mac OS).
It also works if kindlegen is in the same directory as KCC.
I could add the default directory, but one can change the installation directory and path is more flexible.

A better support would be to use Kindle Previewer 3.exe directly instead of kindlegen, like here:
#460 (comment)
and a way to make it work on Linux. This work is in progress

[innocenat]

Right now, KCC detects kindlegen if the directory is in the PATH Environment Variable (Windows, Linux, Mac OS).

It actually doesn't respect PATH on Mac OS. I know, I spent hours figuring this out when I first use it. The culprit is here:

kcc/kcc.py

Lines 30 to 32 in c3dad08

	os.environ['PATH'] = os.path.dirname(os.path.abspath(sys.executable)) + \
	'/../Resources:/Applications/Kindle Comic Creator/Kindle Comic Creator.app/Contents/' \
	'MacOS:/usr/local/bin:/usr/bin:/bin'

Basically if it's frozen (packaged) then KCC overwrite the entire PATH variable on Mac OS. On line 40, it also change the PATH variable for non-frozen path (probably to aid development).

Which is why I suggest adding the default Kindlegen path should be trivial. Note that this only apply to the GUI app, since the command line tools doesn't get invoked via kcc.py.

Also I don't think invoking Kindle Previewer directly is a good idea. Right now it produce MOBI, yes, but there are no guaranteed that one day it might produce KFX instead.

[darodi]

OK I'm adding this and reopening the issue.