205 lines
5 KiB
Bash
205 lines
5 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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########################################
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# Seby's Ephemeral Debian Env
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# curl | bash safe
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########################################
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########################################
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# Styling
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########################################
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TTY="/dev/tty"
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BOLD="\033[1m"
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GREEN="\033[32m"
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YELLOW="\033[33m"
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RED="\033[31m"
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BLUE="\033[34m"
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RESET="\033[0m"
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section() { printf "\n${BLUE}${BOLD}==> %s${RESET}\n" "$*"; }
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say() { printf "${GREEN}✔ %s${RESET}\n" "$*"; }
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warn() { printf "${YELLOW}⚠ %s${RESET}\n" "$*"; }
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err() { printf "${RED}✖ %s${RESET}\n" "$*"; }
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have() { command -v "$1" >/dev/null 2>&1; }
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need_tty() {
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if [[ ! -r "$TTY" || ! -w "$TTY" ]]; then
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err "No interactive TTY available."
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exit 1
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fi
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}
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prompt() {
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local msg="$1"
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local default="${2:-}"
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local out
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if [[ -n "$default" ]]; then
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printf "${BOLD}%s${RESET} " "$msg [$default]:" >"$TTY"
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else
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printf "${BOLD}%s${RESET} " "$msg:" >"$TTY"
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fi
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IFS= read -r out <"$TTY"
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printf "%s" "${out:-$default}"
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}
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confirm_default_no() {
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local msg="$1"
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local ans
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ans="$(prompt "$msg [y/N]")"
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[[ "${ans,,}" == "y" || "${ans,,}" == "yes" ]]
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}
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confirm_default_yes() {
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local msg="$1"
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local ans
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ans="$(prompt "$msg [Y/n]" "y")"
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[[ "${ans,,}" == "y" || "${ans,,}" == "yes" ]]
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}
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########################################
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# Spinner (writes to /dev/tty so curl|bash stays safe)
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########################################
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run_with_spinner() {
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local label="$1"; shift
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("$@") &
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local pid=$!
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local spin='|/-\'
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local i=0
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printf "\033[?25l" >"$TTY" || true
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while kill -0 "$pid" 2>/dev/null; do
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i=$(( (i + 1) % 4 ))
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printf "\r${BLUE}${BOLD}..${RESET} %s %s" "${spin:$i:1}" "$label" >"$TTY"
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sleep 0.12
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done
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wait "$pid"
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local rc=$?
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printf "\r\033[K" >"$TTY"
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printf "\033[?25h" >"$TTY" || true
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return "$rc"
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}
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########################################
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# Header
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########################################
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clear
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cat << "EOF"
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_____ _____ ___
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|_ _|__ _ __ ___ _ __ | ___|_ ____ __ / _ \
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| |/ _ \ '_ ` _ \| '_ \ ____| |_ | '_ \ \ / /| | | |
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| | __/ | | | | | |_) |____| _|| | | \ V / | |_| |
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|_|\___|_| |_| |_| .__/ |_| |_| |_|\_/ \___/
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|_|
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Ephemeral Debian Env | v1.0
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EOF
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need_tty
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if ! have docker; then
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err "Docker not found. Install it first, then re-run this script."
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exit 1
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fi
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say "Docker detected: $(docker --version)"
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########################################
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# Configure
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########################################
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section "Configuration"
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TAG="$(prompt "Debian tag" "bookworm")"
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IMAGE="debian:${TAG}"
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PACKAGES="$(prompt "Packages to install (space-separated, blank for none)")"
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APT_FLAGS="$(prompt "Extra apt-get flags (e.g. --no-install-recommends)")"
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MOUNT_DIR="$(prompt "Mount a local directory into the container (path or blank)")"
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MOUNT_ARGS=()
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if [[ -n "$MOUNT_DIR" ]]; then
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if [[ -d "$MOUNT_DIR" ]]; then
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MOUNT_ARGS=(-v "$(realpath "$MOUNT_DIR"):/mnt/host")
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say "Will mount $(realpath "$MOUNT_DIR") -> /mnt/host"
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else
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warn "Directory '$MOUNT_DIR' doesn't exist — skipping mount."
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MOUNT_DIR=""
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fi
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fi
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RM_IMAGE=false
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if confirm_default_no "Remove image (${IMAGE}) after exiting, not just the container?"; then
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RM_IMAGE=true
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fi
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if [[ -n "$PACKAGES" ]]; then
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INNER_CMD="apt-get update && apt-get install -y ${APT_FLAGS} ${PACKAGES} && bash"
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else
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INNER_CMD="apt-get update && bash"
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fi
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########################################
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# Summary
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########################################
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section "Summary"
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say "Image: ${IMAGE}"
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say "Packages: ${PACKAGES:-<none>}"
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[[ -n "$MOUNT_DIR" ]] && say "Mount: $(realpath "$MOUNT_DIR") -> /mnt/host"
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say "Cleanup: container removed on exit$([[ "$RM_IMAGE" == true ]] && echo ", image removed too")"
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if ! confirm_default_yes "Launch now?"; then
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warn "Aborted."
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exit 0
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fi
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########################################
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# Pull image (quiet + spinner)
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########################################
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section "Pulling image"
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if run_with_spinner "Pulling ${IMAGE}..." docker pull "$IMAGE" >/dev/null 2>&1; then
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say "Image ready: ${IMAGE}"
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else
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err "Failed to pull ${IMAGE}"
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exit 1
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fi
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########################################
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# Launch
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########################################
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section "Launching ephemeral environment"
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say "Type 'exit' when you're done — the container cleans up automatically."
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set +e
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docker run --rm -it "${MOUNT_ARGS[@]}" "$IMAGE" bash -c "$INNER_CMD" <"$TTY"
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EXIT_CODE=$?
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set -e
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section "Done"
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say "Container exited (code ${EXIT_CODE}) and was automatically removed."
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########################################
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# Optional image cleanup
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########################################
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if [[ "$RM_IMAGE" == true ]]; then
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section "Image cleanup"
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IN_USE="$(docker ps -a --filter ancestor="$IMAGE" -q)"
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if [[ -n "$IN_USE" ]]; then
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warn "Other containers still reference ${IMAGE} — skipping removal:"
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docker ps -a --filter ancestor="$IMAGE"
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else
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docker rmi "$IMAGE" >/dev/null 2>&1 && say "Removed image ${IMAGE}."
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fi
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fi
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say "All done."
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