Setup proot

setup_proot.sh

#!/usr/bin/env bash
set -e

BASE_DIR="$HOME/proot-debian"
ROOTFS_DIR="$BASE_DIR/rootfs"
BIN_DIR="$BASE_DIR/bin"
WORK_DIR="$BASE_DIR/workspace"

PROOT="$BIN_DIR/proot"
ENTER="$BASE_DIR/enter.sh"
ROOTFS_FILE="$BASE_DIR/rootfs.tar.xz"

INDEX_BASE="https://images.linuxcontainers.org/images/debian/trixie/amd64/cloud/"
MIRROR_INDEX="https://down.nigx.cn/images.linuxcontainers.org/images/debian/trixie/amd64/cloud/"

mkdir -p "$ROOTFS_DIR" "$BIN_DIR" "$WORK_DIR"

echo "[1/4] Downloading proot..."

PROOT_URL="https://master.dl.sourceforge.net/project/proot.mirror/v5.3.0/proot-v5.3.0-x86_64-static?viasf=1&fid=296683f2ebc377b4"

if [ ! -f "$PROOT" ]; then
    wget -q --show-progress -O "$PROOT" "$PROOT_URL"
    chmod +x "$PROOT"
fi

echo "[2/4] Resolving rootfs (mirror -> index fallback)..."

download_rootfs() {

    # =========================
    # 1. 解析 mirror index
    # =========================
    echo "[*] Parsing mirror index..."

    MIRROR_HTML=$(wget -q -O - "$MIRROR_INDEX" || true)

    MIRROR_DIR=$(echo "$MIRROR_HTML" | \
        grep -oE '[0-9]{8}_[0-9]{2}:[0-9]{2}/' | \
        sort | tail -n 1)

    if [ -n "$MIRROR_DIR" ]; then
        MIRROR_URL="${MIRROR_INDEX}${MIRROR_DIR}rootfs.tar.xz"

        echo "[*] Trying mirror rootfs: $MIRROR_URL"

        if wget -q --show-progress -O "$ROOTFS_FILE" "$MIRROR_URL"; then
            return 0
        fi
    fi

    # =========================
    # 2. fallback official index
    # =========================
    echo "[*] Mirror failed, parsing official index..."

    OFFICIAL_HTML=$(wget -q -O - "$INDEX_BASE")

    OFFICIAL_DIR=$(echo "$OFFICIAL_HTML" | \
        grep -oE '[0-9]{8}_[0-9]{2}:[0-9]{2}/' | \
        sort | tail -n 1)

    if [ -z "$OFFICIAL_DIR" ]; then
        echo "Failed to resolve rootfs directory"
        exit 1
    fi

    OFFICIAL_URL="${INDEX_BASE}${OFFICIAL_DIR}rootfs.tar.xz"

    echo "[*] Downloading official: $OFFICIAL_URL"

    wget -q --show-progress -O "$ROOTFS_FILE" "$OFFICIAL_URL"
}

if [ ! -f "$ROOTFS_DIR/bin/bash" ]; then
    download_rootfs

    echo "[3/4] Extracting rootfs..."
    mkdir -p "$ROOTFS_DIR"
    tar -xf "$ROOTFS_FILE" -C "$ROOTFS_DIR"
fi

echo "[4/4] Creating launcher..."

cat > "$ENTER" <<EOF
#!/usr/bin/env bash
exec "$PROOT" \
  -S "$ROOTFS_DIR" \
  -b "$WORK_DIR:/workspace" \
  /bin/bash
EOF

chmod +x "$ENTER"

echo ""
echo "✅ Setup complete!"
echo ""
echo "Run:"
echo "   $ENTER"
echo ""