WIP: start ripping out args (MR 2252)

Cease merging pmbootstrap.cfg into args, implement a Context type to let
us pull globals out of thin air (as an intermediate workaround) and rip
args out of a lot of the codebase.

This is just a first pass, after this we can split all the state that
leaked over into Context into types with narrower scopes (like a
BuildContext(), etc).

Signed-off-by: Caleb Connolly <caleb@postmarketos.org>

pmb/types.py

@@ -0,0 +1,194 @@
+# Copyright 2024 Caleb Connolly
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from argparse import Namespace
+import multiprocessing
+import os
+from pathlib import Path
+from typing import Dict, List, Optional, Tuple, TypedDict, Union
+
+PathString = Union[Path, str]
+Env = Dict[str, PathString]
+
+# These types are not definitive / API, they exist to describe the current
+# state of things so that we can improve our type hinting coverage and make
+# future refactoring efforts easier.
+
+class PartitionLayout(TypedDict):
+    kernel: Optional[int]
+    boot: int
+    reserve: Optional[int]
+    root: int
+
+class AportGenEntry(TypedDict):
+    prefixes: List[str]
+    confirm_overwrite: bool
+
+# Property list generated with:
+# $ rg --vimgrep "((^|\s)args\.\w+)" --only-matching | cut -d"." -f3 | sort | uniq
+class PmbArgs():
+    action_flasher: str
+    action_initfs: str
+    action_kconfig: str
+    action_netboot: str
+    add: str
+    all: bool
+    all_git: str
+    all_stable: str
+    android_recovery_zip: str
+    aports: Path
+    _aports_real: str
+    arch: str
+    as_root: str
+    assume_yes: str
+    auto: str
+    autoinstall: str
+    boot_size: str
+    build_default_device_arch: str
+    build_pkgs_on_install: bool
+    buildroot: str
+    built: str
+    ccache_size: str
+    cipher: str
+    clear_log: bool
+    cmdline: str
+    command: str
+    config: Path
+    cross: bool
+    details: bool
+    details_to_stdout: bool
+    deviceinfo: Dict[str, str]
+    deviceinfo_parse_kernel: str
+    devices: str
+    disk: Path
+    dry: str
+    efi: str
+    envkernel: str
+    export_folder: Path
+    extra_space: str
+    fast: str
+    file: str
+    filesystem: str
+    flash_method: str
+    folder: str
+    force: str
+    fork_alpine: str
+    # This is a filthy lie
+    from_argparse: "PmbArgs"
+    full_disk_encryption: str
+    hook: str
+    host: str
+    hostname: str
+    host_qemu: str
+    image_size: str
+    install_base: str
+    install_blockdev: str
+    install_cgpt: str
+    install_key: bool
+    install_local_pkgs: str
+    install_recommends: str
+    is_default_channel: str
+    iter_time: str
+    jobs: str
+    kconfig_check_details: str
+    kernel: str
+    keymap: str
+    lines: str
+    log: Path
+    mirror_alpine: str
+    mirrors_postmarketos: List[str]
+    name: str
+    no_depends: str
+    no_fde: str
+    no_firewall: str
+    no_image: str
+    non_existing: str
+    no_reboot: str
+    no_sshd: str
+    odin_flashable_tar: str
+    offline: bool
+    ondev_cp: List[Tuple[str, str]]
+    on_device_installer: str
+    ondev_no_rootfs: str
+    overview: str
+    # FIXME (#2324): figure out the args.package vs args.packages situation
+    package: str | List[str]
+    packages: List[str]
+    partition: str
+    password: str
+    path: Path
+    pkgname: str
+    pkgname_pkgver_srcurl: str
+    port: str
+    qemu_audio: str
+    qemu_cpu: str
+    qemu_display: str
+    qemu_gl: str
+    qemu_kvm: str
+    qemu_redir_stdio: str
+    qemu_tablet: str
+    qemu_video: str
+    recovery_flash_kernel: str
+    recovery_install_partition: str
+    ref: str
+    replace: str
+    repository: str
+    reset: str
+    resume: str
+    rootfs: str
+    rsync: str
+    scripts: str
+    second_storage: str
+    selected_providers: Dict[str, str]
+    sparse: str
+    split: str
+    src: str
+    ssh_keys: str
+    strict: str
+    sudo_timer: bool
+    suffix: str
+    systemd: str
+    timeout: float
+    user: str
+    value: str
+    verbose: str
+    verify: str
+    work: Path
+    xauth: str
+    zap: str
+
+
+class Config():
+    aports: Path = Path(os.path.expanduser("~") +
+                        "/.local/var/pmbootstrap/cache_git/pmaports")
+    boot_size: int = 256
+    build_default_device_arch: bool = False
+    build_pkgs_on_install: bool = True
+    ccache_size: str = "5G" # yeahhhh this one has a suffix
+    device: str = "qemu-amd64"
+    extra_packages: str = "none"
+    extra_space: int = 0
+    hostname: str = ""
+    is_default_channel: bool = True
+    jobs: str = str(multiprocessing.cpu_count() + 1)
+    kernel: str = "stable"
+    keymap: str = ""
+    locale: str = "en_US.UTF-8"
+    # NOTE: mirrors use http by default to leverage caching
+    mirror_alpine: str = "http://dl-cdn.alpinelinux.org/alpine/"
+    # NOTE: mirrors_postmarketos variable type is supposed to be
+    #       comma-separated string, not a python list or any other type!
+    mirrors_postmarketos: List[str] = ["http://mirror.postmarketos.org/postmarketos/"]
+    qemu_redir_stdio: bool = False
+    ssh_key_glob: str = "~/.ssh/id_*.pub"
+    ssh_keys: bool = False
+    sudo_timer: bool = False
+    systemd: str = "default"
+    timezone: str = "GMT"
+    ui: str = "console"
+    ui_extras: bool = False
+    user: str = "user"
+    work: Path = Path(os.path.expanduser("~") + "/.local/var/pmbootstrap")
+
+    providers: Dict[str, str] = { }
+