remove unnecessary packages, only keep what I want

remove.py

import subprocess

must_have = [
        "linux46",
        "systemd",
        "acpid",

        "xorg-server",
        "xf86-video-ati",
        "xf86-input-evdev",
        "xorg-xinit",
        "xorg-utils",

        "gnome-shell",
        "gnome-session",
        "gnome-terminal",
        "polkit-gnome",
        "gnome-backgrounds",
        "networkmanager",

        "alsa-firmware",
        "alsa-lib",
        "alsa-plugins",
        "alsa-utils",
        "pulseaudio-alsa",
        "pulseaudio",
        "gstreamer",
        "gstreamer0.10",
        "gstreamer0.10-good",

        "pacman-mirrorlist",
        "sudo",
        "tzdata",
    ]

def get_base_packages():
    cmd = "pacman -Qqg base"
    out = subprocess.check_output(cmd, shell=True).decode()
    return out.split()

def double_check_removable(pkg):
    cmd = "pactree -ar %s" % pkg
    try:
        out = subprocess.check_output(cmd, shell=True).decode()
    except:
        return True
    for p in must_have:
        check = "-%s\n" % p
        if check in out:
            return False
    return True

def get_all_pkgs():
    pkgs = []
    cmd = "pacman -Qi"
    out = subprocess.check_output(cmd, shell=True).decode().split("\n\n")
    for block in out:
        pkg = {}
        for line in block.split("\n"):
            if line.startswith("Name"):
                pkg["name"] = line.split(":")[-1].strip()
            elif line.startswith("Version"):
                pkg["version"] = line.split(":")[-1].strip()
            elif line.startswith("Installed Size"):
                pkg["size"] = line.split(":")[-1].strip()
                pkg["weight"] = 0
        if "name" in pkg:
            pkgs.append(pkg)
    return pkgs

def get_dependencies(pkg):
    cmd = "pactree -a %s" % pkg
    out = subprocess.check_output(cmd, shell=True).decode().split("\n")
    deps = []
    for line in out:
        if "-" in line:
            name = (line.split("-", 1)[-1])
            if "provides" in name:
                name = name.split("provides")[0]
            deps.append(name)
    return deps

def remove(pkg):
    cmd = "sudo pacman -Rsc --noconfirm %s" % pkg
    subprocess.call(cmd, shell=True)

all_pkgs = get_all_pkgs()
must_have.extend(get_base_packages())

for p in must_have:
    for pkg in all_pkgs:
        if p == pkg["name"]:
            pkg["weight"] = 9999
    deps = get_dependencies(p)
    for dep in deps:
        for pkg in all_pkgs:
            if dep == pkg["name"]:
                pkg["weight"] += 1

all_pkgs = sorted(all_pkgs, key=lambda pkg: pkg["weight"])
for p in all_pkgs:
    if p["weight"] == 0 and double_check_removable(p["name"]):
        print("remove %s" % p["name"])
        remove(p["name"])

remove_v2.py

import subprocess

must_have = [
    "linux414",
    "systemd",
    "acpid",
    "xorg-server",
    "xf86-video-ati",
    "xf86-input-evdev",
    "xorg-xinit",
    "plasma-desktop",
    "plasma-nm",
    "plasma-pa",
    "plasma-workspace-wallpapers",
    "plasma5-themes-breath",
    "kwallet-pam",
    "gtk-theme-breath",
    "breeze",
    "breath-icon-theme",
    "kde-gtk-config",
    "konsole",
    "dolphin",
    "sddm",
    "sddm-breath-theme",
    "networkmanager",
    "alsa-firmware",
    "alsa-lib",
    "alsa-plugins",
    "alsa-utils",
    "pulseaudio-alsa",
    "pulseaudio",
    "gstreamer",
    "gst-plugins-bad",
    "gst-plugins-good",
    "pacman-mirrorlist",
    "sudo",
    "tzdata",
    "firefox",
    "noto-fonts",
    "noto-fonts-compat",
    "noto-fonts-emoji",
]

def get_base_packages():
    cmd = "pacman -Qqg base"
    out = subprocess.check_output(cmd, shell=True).decode()
    return out.split()

def double_check_removable(pkg):
    cmd = "pactree -ar %s" % pkg
    try:
        out = subprocess.check_output(cmd, shell=True).decode()
    except:
        return True
    for p in must_have:
        check = "-%s\n" % p
        if check in out:
            return False
    return True

def get_all_pkgs():
    pkgs = []
    cmd = "pacman -Qi"
    out = subprocess.check_output(cmd, shell=True).decode().split("\n\n")
    for block in out:
        pkg = {}
        for line in block.split("\n"):
            if line.startswith("Name"):
                pkg["name"] = line.split(":")[-1].strip()
            elif line.startswith("Version"):
                pkg["version"] = line.split(":")[-1].strip()
            elif line.startswith("Installed Size"):
                pkg["size"] = line.split(":")[-1].strip()
                pkg["weight"] = 0
        if "name" in pkg:
            pkgs.append(pkg)
    return pkgs

def get_dependencies(pkg):
    cmd = "pactree -a %s" % pkg
    out = subprocess.check_output(cmd, shell=True).decode().split("\n")
    deps = []
    for line in out:
        if "-" in line:
            name = (line.split("-", 1)[-1])
            if "provides" in name:
                name = name.split("provides")[0]
            deps.append(name)
    return deps

def remove(pkg):
    cmd = "sudo pacman -Rsc --noconfirm %s" % pkg
    subprocess.call(cmd, shell=True)

all_pkgs = get_all_pkgs()
must_have.extend(get_base_packages())

for p in must_have:
    for pkg in all_pkgs:
        if p == pkg["name"]:
            pkg["weight"] = 9999
    deps = get_dependencies(p)
    for dep in deps:
        for pkg in all_pkgs:
            if dep == pkg["name"]:
                pkg["weight"] += 1

all_pkgs = sorted(all_pkgs, key=lambda pkg: pkg["weight"])
for p in all_pkgs:
    if p["weight"] == 0 and double_check_removable(p["name"]):
        print("remove %s" % p["name"])
        remove(p["name"])

noto fonts

ssdm -> kdewallet

breath icons