Refactor Debian container script into modular components with configurable paths and documentation.

Signed-off-by: Richard Qin <richard.qin.x@gmail.com>

1 files changed, 0 insertions, 100 deletions

diff --git a/debian-container.sh b/debian-container.sh
deleted file mode 100644
index be2b1f5..0000000
--- a/debian-container.sh
+++ /dev/null
@@ -1,100 +0,0 @@
-#!/usr/bin/env bash
-# Debian 构建容器
-set -Eeuo pipefail
-
-SCRIPT=$(readlink -f -- "${BASH_SOURCE[0]}")
-IMAGE=$PWD/rootfs.ext4
-ROOT=$PWD/debian-root/
-ACTION=${1:-}
-
-if [[ ${EUID} -ne 0 ]]; then
-  echo '请使用 sudo 执行本脚本。' >&2
-  exit 1
-fi
-
-cleanup_mounts() {
-  umount "$ROOT/dev/pts" 2>/dev/null || true
-  umount "$ROOT/dev" 2>/dev/null || true
-  umount "$ROOT/proc" 2>/dev/null || true
-  umount "$ROOT" 2>/dev/null || true
-}
-
-mount_root() {
-  mkdir -p "$ROOT"
-  mount -o loop "$IMAGE" "$ROOT"
-  mkdir -p "$ROOT/proc" "$ROOT/dev"
-}
-
-mount_virtual_filesystems() {
-  mount -t proc -o ro,nosuid,nodev,noexec proc "$ROOT/proc"
-  mount -t tmpfs -o mode=0755,nosuid tmpfs "$ROOT/dev"
-  mknod -m 0666 "$ROOT/dev/null" c 1 3
-  mknod -m 0666 "$ROOT/dev/zero" c 1 5
-  mknod -m 0666 "$ROOT/dev/random" c 1 8
-  mknod -m 0666 "$ROOT/dev/urandom" c 1 9
-  mknod -m 0666 "$ROOT/dev/tty" c 5 0
-  mkdir -p "$ROOT/dev/pts"
-  mount -t devpts -o newinstance,ptmxmode=0666,mode=0620 devpts "$ROOT/dev/pts"
-  ln -s pts/ptmx "$ROOT/dev/ptmx"
-}
-
-# 防止多个会话同时读写同一 ext4 镜像。
-case "$ACTION" in
-  init|enter|delete)
-    mkdir -p /run/lock
-    exec 9>/run/lock/debian-container.lock
-    flock -n 9 || { echo 'Debian 容器已经在运行或正在初始化。' >&2; exit 1; }
-    ;;
-esac
-
-case "$ACTION" in
-  init)
-    for tool in debootstrap unshare mkfs.ext4 mount chroot setpriv flock; do
-      command -v "$tool" >/dev/null || { echo "缺少工具：$tool" >&2; exit 1; }
-    done
-    if [[ -e "$IMAGE" ]]; then
-      echo "镜像已存在：$IMAGE。请使用 enter 进入，避免覆盖容器数据。" >&2
-      exit 1
-    fi
-    mkdir -p "$(dirname "$IMAGE")" "$ROOT"
-    truncate -s 3G "$IMAGE"
-    mkfs.ext4 -F -q -L DEBIAN_CONTAINER "$IMAGE"
-    unshare --mount --propagation private -- bash "$SCRIPT" _init
-    echo '初始化完成。执行 sudo bash debian-container.sh enter 进入容器。'
-    ;;
-  _init)
-    mount_root
-    trap cleanup_mounts EXIT
-    debootstrap --variant=minbase stable "$ROOT" http://deb.debian.org/debian
-    rm -f "$ROOT/etc/resolv.conf"
-    cp -L /etc/resolv.conf "$ROOT/etc/resolv.conf"
-    mount_virtual_filesystems
-    chroot "$ROOT" /usr/bin/env DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get update
-    chroot "$ROOT" /usr/bin/env DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get install -y passwd util-linux vim-tiny e2fsprogs
-    echo debian-container > "$ROOT/etc/hostname"
-    ;;
-  enter)
-    [[ -f "$IMAGE" ]] || { echo '没有找到镜像，请先运行 init。' >&2; exit 1; }
-    # 单独创建网络命名空间，暂时没有联网功能。
-    unshare --mount --uts --ipc --pid --net --fork --propagation private -- bash "$SCRIPT" _enter
-    ;;
-  _enter)
-    mount_root
-    trap cleanup_mounts EXIT
-    mount_virtual_filesystems
-    hostname debian-container
-    echo '已进入独立的 Debian 实验环境；输入 exit 可退出。'
-    # 完成挂载后撤销一些宿主级危险权限，保留 CAP_LINUX_IMMUTABLE。
-    setpriv --bounding-set=-sys_admin,-net_admin,-net_raw,-sys_module,-sys_boot,-sys_time,-sys_rawio,-sys_ptrace,-syslog -- \
-      chroot "$ROOT" /bin/bash -l
-    ;;
-  delete)
-    [[ -f "$IMAGE" ]] || { echo 'Debian 镜像已不存在。'; exit 0; }
-    rm -- "$IMAGE"
-    echo 'Debian 镜像已删除。'
-    ;;
-  *)
-    echo "用法：sudo bash $0 init|enter|delete" >&2
-    exit 2
-    ;;
-esac