There was only one function in module ipc: eintr_retry_call. This
function was used in pdftohtml module, and turns out[1] it's not needed
anymore. Support for retrying on syscall interrupts was introduced in
Python 3.5 (which was released in 2015), and covers subprocess module
among other modules. In this commit, mentioned eintr_retry_call function
has been removed, and couple of cosmetic changes was done in module
pdftohtml.
[1] https://www.python.org/dev/peps/pep-0475/
There was (and perhaps it exists in other modules, need to check) a bad
habit of importing objects out of module A into B just to be able of
import those object from module B. In this case there was import from
module config_base into module config. This commit fix this.
Every mime related function in main __init__.py has a flag check for the
check if initialization has already done. This is nonsense, since it
should be done implicitly early on the converter is starting.
This commit straight the things out, and initialization is done in cli
module.
Also, function guess_type was removed, since it's just a proxy for
mimetypes.guess_type function.
This is progressing refactor of the calibre code to make it more
readable, and transform it to something more coherent.
In this patch, there are changes regarding imports for some modules,
instead of polluting namespace of each module with some other modules
symbols, which often were imported from other modules. Yuck.
