fix: enable unrar on all distros, not just Fedora (#1376)

* fix: enable unrar on all distros, not just Fedora

unrar was gated behind distro.id() == 'fedora', so on Debian/Ubuntu
the binary was installed but never invoked. Try unrar unconditionally
after 7z, with an optional rarfile Python fallback.

Fixes CBR extraction on non-Fedora Linux distributions.

* fix: gate unrar on Linux and drop unused distro dependency

Debian/Ubuntu's '7zip' package ships the upstream 7zz binary, which
excludes RAR support for licensing reasons, so 7z fails to read .cbr
(RAR) archives. unrar was installed but only invoked when
distro.id() == 'fedora', so on Debian it was never tried and extraction
failed.

Per maintainer feedback, gate unrar on platform.system() == 'Linux'
(not needed on Windows or macOS) and drop the rarfile PyPI fallback to
avoid a new dependency. Since the code no longer imports distro, also
remove it from the requirements files and setup.py.

kindlecomicconverter/comicarchive.py

@@ -22,7 +22,6 @@ from functools import cached_property, lru_cache
 import os
 from pathlib import Path
 import platform
-import distro
 from subprocess import STDOUT, PIPE, CalledProcessError
 from xml.dom.minidom import parseString
 from xml.parsers.expat import ExpatError
@@ -46,7 +45,7 @@ class ComicArchive:
             [SEVENZIP, 'l', '-y', '-p1', self.basename],
         ]
 
-        if distro.id() == 'fedora' or distro.like() == 'fedora':
+        if platform.system() == 'Linux':
             extraction_commands.append(
                 ['unrar', 'l', '-y', '-p1', self.basename],
             )
@@ -85,7 +84,7 @@ class ComicArchive:
 
         extraction_commands.reverse()
 
-        if distro.id() == 'fedora' or distro.like() == 'fedora':
+        if platform.system() == 'Linux':
             extraction_commands.append(
                 ['unrar', 'x', '-y', '-x__MACOSX', '-x.DS_Store', '-xthumbs.db', '-xThumbs.db', self.basename, targetdir]
             )

requirements-docker.txt

@@ -5,7 +5,6 @@ python-slugify>=8.0.4
 packaging>=26.2
 mozjpeg-lossless-optimization>=1.2.0
 natsort>=8.4.0
-distro>=1.9.0
 # Below requirements are compiled in Dockefile
 # numpy==2.3.4
 # PyMuPDF==1.26.6

requirements-osx-legacy.txt

@@ -6,6 +6,5 @@ python-slugify>=8.0.4
 packaging>=26.2
 mozjpeg-lossless-optimization>=1.2.0
 natsort>=8.4.0
-distro>=1.9.0
 numpy<2
 PyMuPDF==1.25.5

requirements-win7.txt

@@ -6,6 +6,5 @@ python-slugify>=8.0.4
 packaging>=26.2
 mozjpeg-lossless-optimization>=1.2.0
 natsort>=8.4.0
-distro>=1.9.0
 numpy==1.23.5
 PyMuPDF>=1.16

requirements.txt

@@ -6,6 +6,5 @@ python-slugify>=8.0.4,<9.0.0
 packaging>=26.2
 mozjpeg-lossless-optimization>=1.2.0
 natsort>=8.4.0
-distro>=1.9.0
 numpy>=1.22.4
 PyMuPDF>=1.18.0

setup.py

@@ -155,7 +155,6 @@ setuptools.setup(
         'python-slugify>=1.2.1,<9.0.0',
         'mozjpeg-lossless-optimization>=1.2.0',
         'natsort>=8.4.0',
-        'distro>=1.8.0',
         'numpy>=1.22.4',
         'packaging>=23.2',
         'PyMuPDF>=1.16.1',