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getrid.py
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getrid.py
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#!/usr/bin/env python3
import copy
import os
import subprocess
from curses import wrapper
from functools import lru_cache
from shutil import get_terminal_size
import urwid
import urwid.decoration
from pacgraph import Arch, human_si, packs_by_size, toplevel_packs
NAME = "getrid"
VERSION = "0.2.2"
HELP_TEXT = f"""
{NAME} {VERSION}
- Press <Enter>, <Space> or 'd' to mark a package for deletion
- Press 't' to temporally hide (keep) a package
- Press 'e' to hide (keep) a package also in future calls of {NAME}
- Press 's' to show/hide all hidden packages
- Pressing the same key again will unset the status.
- Use j/k, arrow keys or the mouse for movements.
- Press q to exit.
"""
class States:
TO_KEEP = "to_keep"
TO_KEEP_FOR_NOW = "to_keep_for_now"
TO_REMOVE = "to_remove"
def get_package_list():
tree = Arch().local_load()
packages = packs_by_size(tree, toplevel_packs(tree))
return packages
@lru_cache()
def get_info(softwarename, size=40):
env = os.environ.copy()
env["COLUMNS"] = str(size)
subp = subprocess.run(["pacman", "-Qi", softwarename], capture_output=True, env=env)
return subp.stdout
class PkgButton(urwid.Button):
def __init__(self, package):
self.pkgSize = package[0]
self.pkgName = package[1]
label = "{} {}".format(human_si(self.pkgSize), self.pkgName)
super().__init__(label)
def connect_signal(self, call):
urwid.connect_signal(self, "click", call, self.pkgName)
def set_state(self, state=None):
self.set_label((state, self.label))
class Tui:
to_remove = []
to_keep = []
to_keep_for_now = []
storage_counter = {
States.TO_REMOVE: 0,
States.TO_KEEP: 0,
States.TO_KEEP_FOR_NOW: 0,
}
hidden = True
palette = [
("reversed", "standout", "default"),
(States.TO_REMOVE, "black", "dark red"),
(States.TO_KEEP, "light gray", "dark green"),
(States.TO_KEEP_FOR_NOW, "light gray", "dark blue"),
]
def __init__(self, to_keep=[]):
self.to_keep = to_keep
body = [urwid.Text("Packages"), urwid.Divider()]
self.packages = get_package_list()
for pkg in self.packages:
button = PkgButton(pkg)
button.connect_signal(self.toggle_to_remove)
body.append(urwid.AttrMap(button, None, focus_map="reversed"))
if pkg[1] in self.to_keep:
button.set_state(States.TO_KEEP)
focuswalker = urwid.SimpleFocusListWalker(body)
self.list = urwid.ListBox(focuswalker)
self.backup = copy.copy(self.list.body)
self.left = urwid.Padding(self.list, left=2, right=2)
self.help = urwid.Text(HELP_TEXT)
self.stats = urwid.Text("")
self.info = urwid.Text("")
self.right = urwid.Filler(
urwid.Pile(
[
self.help,
urwid.Divider("-"),
self.stats,
urwid.Divider("-"),
urwid.Text("Package info"),
urwid.Divider(),
self.info,
]
),
"top",
)
self.cols = urwid.Columns([self.left, self.right])
urwid.connect_signal(focuswalker, "modified", self.handle_input)
# Hide the elements from to_keep and initialise stats
self.hide_all()
self.show_stats()
# Start the MainLoop
self.loop = urwid.MainLoop(
self.cols, palette=self.palette, unhandled_input=self.handle_input
)
def __run__(self, stdscr):
self.loop.run()
def run(self):
wrapper(self.__run__)
def get_selected(self):
return self.left.base_widget.get_focus_widgets()[0]
def get_selected_pkg(self):
if type(self.get_selected()) == urwid.widget.Text:
return self.get_selected().text
return self.get_selected().base_widget
def up(self):
focus = self.left.base_widget.focus_position
if focus <= 2:
return
self.left.base_widget.set_focus(focus - 1)
def down(self):
focus = self.left.base_widget.focus_position
try:
self.left.base_widget.set_focus(focus + 1)
except IndexError:
# We are already at the lowest entry
pass
def show_info(self, pkg):
text = get_info(pkg, get_terminal_size().columns // 2)
self.info.set_text(text)
def show_stats(self):
self.stats.set_text(
f"""Statics:
Number removable packages: {len(self.packages)}
Number packages marked for deletion: {len(self.to_remove)}
Number packages marked to keep: {len(self.to_keep)}
Number packages marked to keep for now: {len(self.to_keep_for_now)}
Space being freed: >={human_si(self.storage_counter[States.TO_REMOVE])}
"""
)
def exit(self):
raise urwid.ExitMainLoop()
def handle_input(self, key=None):
if key in ("q", "Q"):
self.exit()
# This will most likely fail due to a race condition in __init__
# Doesn't matter, just ignore it
try:
button = self.get_selected()
name = self.get_selected_pkg().pkgName
except AttributeError:
return
except IndexError:
return
# On every movement: show package info
if key is None:
self.show_info(name)
# Keep for this runtime
elif key == "t":
self.toggle_to_keep_for_now(button, name)
# Keep "forever"
elif key == "e":
self.toggle_to_keep(button, name)
# Delete
elif key == "d":
self.toggle_to_remove(button, name)
# show/hide packages that will be kept
elif key == "s":
self.toggle_hidden()
# Vim-movements
elif key == "j":
self.down()
elif key == "k":
self.up()
def toggle_hidden(self):
if self.hidden:
self.unhide_all()
else:
self.hide_all()
def hide_all(self):
to_remove = []
# self.list.body is subtype of MonitoredList: removing an element will
# skip the next element in the iterator, therefore we have to loop twice
for button in self.list.body:
if type(button) != urwid.decoration.AttrMap:
continue
name = button.base_widget.pkgName
if name in self.to_keep or name in self.to_keep_for_now:
to_remove.append(button)
for button in to_remove:
self.list.body.remove(button)
self.hidden = True
def unhide_all(self):
focused_element = self.list.body.get_focus()[0]
self.list.body = copy.copy(self.backup)
focus = self.list.body.index(focused_element)
self.list.set_focus(focus)
self.hidden = False
def toggle_state(self, button, name, stateset, state):
if name in stateset:
stateset.remove(name)
button.set_state()
self.storage_counter[state] -= button.base_widget.pkgSize
else:
if name in self.to_keep:
self.toggle_state(button, name, self.to_keep, States.TO_KEEP)
if name in self.to_keep_for_now:
self.toggle_state(
button, name, self.to_keep_for_now, States.TO_KEEP_FOR_NOW
)
if name in self.to_remove:
self.toggle_state(button, name, self.to_remove, States.TO_REMOVE)
stateset.append(name)
button.set_state(state)
self.storage_counter[state] += button.base_widget.pkgSize
if self.hidden:
self.hide_all()
self.show_stats()
def toggle_to_keep_for_now(self, button, name):
self.toggle_state(
button.base_widget, name, self.to_keep_for_now, States.TO_KEEP_FOR_NOW
)
def toggle_to_keep(self, button, name):
self.toggle_state(button.base_widget, name, self.to_keep, States.TO_KEEP)
def toggle_to_remove(self, button, name):
self.toggle_state(button.base_widget, name, self.to_remove, States.TO_REMOVE)
if __name__ == "__main__":
if os.environ.get("XDG_CONFIG_HOME"):
conf_file = os.path.join(os.environ.get("XDG_CONFIG_HOME"), f"{NAME}")
else:
home = os.path.expanduser("~")
conf_file = os.path.join(home, f".{NAME}")
try:
with open(conf_file) as file:
keep = file.readlines()
keep = [x.strip() for x in keep]
except OSError:
keep = []
tui = Tui(keep)
tui.run()
with open(conf_file, "w") as file:
file.write("\n".join(tui.to_keep))
if len(tui.to_remove) > 0:
print()
print("Selected for removal: " + " ".join(tui.to_remove))
if input("Remove packages? [y/N] ").lower() == "y":
if os.geteuid() != 0:
subprocess.run(["sudo", "pacman", "-Rs", *tui.to_remove])
else:
subprocess.run(["pacman", "-Rs", *tui.to_remove])