mirror of
https://github.com/kuhyx/utils.git
synced 2026-11-11 13:27:44 +01:00
Krzysztof kuhy Rudnicki
a18e0da3a9
9p exports a directory TREE and does not follow a symlink pointing out of it. The share directory held `testsAndMisc -> /home/kuhy/testsAndMisc`, so the guest mounted /mnt/hostrepo successfully, listed the symlink, and then got "No such file or directory" following it -- the target path does not exist inside the guest. Measured in a live sandbox, not assumed. `vm share <path>` now bind-mounts the directory into the share and remounts it read-only, so the guest sees real contents while still being unable to write to the host copy. `vm unshare <name>` reverses it. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01VdyMBGCrGVGDWtJ9xe48f3
92 lines
4.0 KiB
Bash
Executable File
92 lines
4.0 KiB
Bash
Executable File
#!/bin/bash
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# ============================================================================
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# vm -- disposable Arch VM sandbox.
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#
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# Runs destructive system scripts (shutdown installers, chattr +i guards,
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# pacman hooks) against a throwaway Arch guest, and verifies the outcome from
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# the HOST -- a guest that powers itself off cannot report its own success.
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# ============================================================================
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set -euo pipefail
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VMBOX_BIN_DIR="$(cd "$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")" && pwd -P)"
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readonly VMBOX_BIN_DIR
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# shellcheck source=../lib/common.sh
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source "$VMBOX_BIN_DIR/../lib/common.sh"
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usage() {
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cat <<'USAGE'
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Usage: vm <command> [args]
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build Build the golden base image (once, ~10 min)
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new <name> [--rtc <ts>] Create a sandbox (instant; thin overlay)
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run <name> <command...> Run a command in the sandbox, report the verdict
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ssh <name> [args...] Interactive shell in the sandbox
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share <host-path> Expose a host dir to sandboxes (read-only bind)
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unshare <name> Stop exposing it
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repo <name> <path> [--worktree]
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Copy a host repo in (clone=HEAD, --worktree=uncommitted)
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screenshot <name> [out.png] Capture the guest screen (for locker tests)
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reset <name> Wipe back to pristine (sub-second)
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rm <name> Delete the sandbox entirely
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list List sandboxes and their state
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--rtc <ts> Pin the guest clock, e.g. 2026-08-22T20:55:00. Stored in the
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VM's meta and re-applied on EVERY launch: the shutdown scripts
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are gated on a 21:00-05:00 window, so an unpinned clock makes
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their tests nondeterministic.
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Examples:
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vm new demo --rtc 2026-08-22T20:55:00
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vm run demo 'sudo systemctl poweroff' # -> verdict: clean poweroff
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vm reset demo # back to pristine
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USAGE
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}
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# vm repo <name> <path> [--worktree]
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cmd_repo() {
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local name="${1:-}" src="${2:-}" mode=clone
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[[ -n "$name" && -n "$src" ]] || die "usage: vm repo <name> <host-path> [--worktree]"
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shift 2
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[[ "${1:-}" == "--worktree" ]] && mode=worktree
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repo_sync "$name" "$src" "$mode"
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}
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cmd_list() {
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[[ -d "$VMBOX_VMS_DIR" ]] || { echo "no sandboxes yet (create one: vm new <name>)"; return 0; }
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local found=0 d name state rtc
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printf '%-20s %-12s %s\n' "NAME" "STATE" "RTC"
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for d in "$VMBOX_VMS_DIR"/*/; do
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[[ -d "$d" ]] || continue
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found=1
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name="$(basename "$d")"
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if vm_is_running "$name"; then state="running"; else state="stopped"; fi
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rtc="$(meta_get "$name" rtc 2>/dev/null || echo '-')"
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printf '%-20s %-12s %s\n' "$name" "$state" "${rtc:--}"
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done
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(( found )) || echo "(none)"
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}
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main() {
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local cmd="${1:-}"
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[[ $# -gt 0 ]] && shift || true
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case "$cmd" in
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build) require_host_deps; source "$VMBOX_LIB_DIR/base.sh"; base_build "$@" ;;
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new) require_host_deps; source "$VMBOX_LIB_DIR/overlay.sh"; overlay_new "$@" ;;
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reset) source "$VMBOX_LIB_DIR/overlay.sh"; overlay_reset "$@" ;;
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rm) source "$VMBOX_LIB_DIR/overlay.sh"; overlay_rm "$@" ;;
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run) require_host_deps; source "$VMBOX_LIB_DIR/run.sh"; run_in_vm "$@" ;;
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ssh) source "$VMBOX_LIB_DIR/ssh.sh"; vm_ssh_interactive "$@" ;;
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screenshot) source "$VMBOX_LIB_DIR/screenshot.sh"; vm_screenshot "$@" ;;
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repo) source "$VMBOX_LIB_DIR/repo.sh"; cmd_repo "$@" ;;
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share) source "$VMBOX_LIB_DIR/repo.sh"; repo_share "$@" ;;
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unshare) source "$VMBOX_LIB_DIR/repo.sh"; repo_unshare "$@" ;;
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list|ls) cmd_list ;;
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-h|--help|help|'') usage ;;
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*) die "unknown command '$cmd' (try: vm --help)" ;;
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esac
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}
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main "$@"
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