Linux: Fix uninstaller not working on linux distros that have no python symlink. Fixes #1876164 [calibre-uninstall doesn't run on Ubuntu 20.04](https://bugs.launchpad.net/calibre/+bug/1876164)

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Kovid Goyal 2020-05-01 10:58:19 +05:30
parent 1200b85f50
commit 2bd808fe86
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@ -105,17 +105,64 @@ class PreserveMIMEDefaults(object): # {{{
UNINSTALL = '''\
#!/bin/sh
# Copyright (C) 2018 Kovid Goyal <kovid at kovidgoyal.net>
search_for_python() {{
# We have to search for python as Ubuntu, in its infinite wisdom decided
# to release 18.04 with no python symlink, making it impossible to run polyglot
# python scripts.
# We cannot use command -v as it is not implemented in the posh shell shipped with
# Ubuntu/Debian. Similarly, there is no guarantee that which is installed.
# Shell scripting is a horrible joke, thank heavens for python.
local IFS=:
if [ $ZSH_VERSION ]; then
# zsh does not split by default
setopt sh_word_split
fi
local candidate_path
local candidate_python
local pythons=python3:python2
# disable pathname expansion (globbing)
set -f
for candidate_path in $PATH
do
if [ ! -z $candidate_path ]
then
for candidate_python in $pythons
do
if [ ! -z "$candidate_path" ]
then
if [ -x "$candidate_path/$candidate_python" ]
then
printf "$candidate_path/$candidate_python"
return
fi
fi
done
fi
done
set +f
printf "python"
}}
PYTHON=$(search_for_python)
echo Using python executable: $PYTHON
$PYTHON -c "import sys; exec(sys.stdin.read());" "$0" <<'CALIBRE_LINUX_INSTALLER_HEREDOC'
#!{python}
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
# vim:fileencoding=UTF-8
from __future__ import print_function, unicode_literals
euid = {euid}
import os, subprocess, shutil, tempfile
import os, subprocess, shutil, tempfile, sys
try:
raw_input
except NameError:
raw_input = input
sys.stdin = open('/dev/tty')
if os.geteuid() != euid:
print ('The installer was last run as user id:', euid, 'To remove all files you must run the uninstaller as the same user')
@ -138,7 +185,7 @@ for f in {mime_resources!r}:
if ret != 0:
print ('WARNING: Failed to remove mime resource', f)
for x in tuple({manifest!r}) + tuple({appdata_resources!r}) + (os.path.abspath(__file__), __file__, frozen_path, dummy_mime_path):
for x in tuple({manifest!r}) + tuple({appdata_resources!r}) + (sys.argv[-1], frozen_path, dummy_mime_path):
if not x or not os.path.exists(x):
continue
print ('Removing', x)
@ -182,6 +229,7 @@ print ()
if mimetype_icons and raw_input('Remove the e-book format icons? [y/n]:').lower() in ['', 'y']:
for i, (name, size) in enumerate(mimetype_icons):
remove_icon('mimetypes', name, size, update=i == len(mimetype_icons) - 1)
CALIBRE_LINUX_INSTALLER_HEREDOC
'''
# }}}