prvng_core/nulib/images/watch.nu
Jesús Pérez 894046ef5a
feat(core): three-layer DAG, unified component arch, commands-registry cache, Nushell 0.112.2 migration
- DAG architecture: `dag show/validate/export` (nulib/main_provisioning/dag.nu),
    config loader (lib_provisioning/config/loader/dag.nu), taskserv dag-executor.
    Backed by schemas/lib/dag/*.ncl; orchestrator emits NATS events via
    WorkspaceComposition::into_workflow. See ADR-020, ADR-021.
  - Unified Component Architecture: components/mod.nu, main_provisioning/
    {components,workflow,extensions,ontoref-queries}.nu. Full workflow engine with
    topological sort and NATS subject emission. Blocks A-H complete (libre-daoshi).
  - Commands-registry: nulib/commands-registry.ncl (Nickel source, 314 lines) +
    JSON cache at ~/.cache/provisioning/commands-registry.json rebuilt on source
    change. cli/provisioning fast-path alias expansion avoids cold Nu startup.
    ADDING_COMMANDS.md documents new-command workflow.
  - Platform service manager: service-manager.nu (+573), startup.nu (+611),
    service-check.nu (+255); autostart/bootstrap/health/target refactored.
  - Nushell 0.112.2 migration: removed all try/catch and bash redirections;
    external commands prefixed with ^; type signatures enforced. Driven by
    scripts/refactor-try-catch{,-simplified}.nu.
  - TTY stack: removed shlib/*-tty.sh; replaced by cli/tty-dispatch.sh,
    tty-filter.sh, tty-commands.conf.
  - New domain modules: images/ (golden image lifecycle), workspace/{state,sync}.nu,
    main_provisioning/{bootstrap,cluster-deploy,fip,state}.nu, commands/{state,
    build,integrations/auth,utilities/alias}.nu, platform.nu expanded (+874).
  - Config loader overhaul: loader/core.nu slimmed (-759), cache/core.nu
    refactored (-454), removed legacy loaders/file_loader.nu (-330).
  - Thirteen new provisioning-<domain>.nu top-level modules for bash dispatcher.
  - Tests: test_workspace_state.nu (+351); updates to test_oci_registry,
    test_services.
  - README + CHANGELOG updated.
2026-04-17 04:27:33 +01:00

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# Image watch — periodic freshness monitor for role image snapshots.
use ./state.nu *
use ./create.nu *
# Poll all role image states every N minutes and report stale snapshots.
export def image-watch [
--interval: int = 60
--auto-build
--notify-only
--provider: string = ""
--infra: string = ""
] {
print $"Image watch started (interval: ($interval)m, auto-build: ($auto_build))"
print "Press Ctrl-C to stop."
print ""
loop {
let states = (image-state-list --provider $provider)
let now_str = ((date now) | format date "%Y-%m-%dT%H:%M:%SZ")
print $"[($now_str)] Checking ($states | length) role image(s)..."
for state in $states {
let fresh = (do {
image-state-is-fresh $state.provider $state.role
} catch { false })
if $state.snapshot_id == "SNAPSHOT_PENDING" {
print $"[PENDING] ($state.provider)/($state.role) — no snapshot built"
} else if not $fresh {
let built = ($state.built_at? | default "unknown")
print $"[STALE] ($state.provider)/($state.role) — last built: ($built) snapshot: ($state.snapshot_id)"
if $auto_build and not $notify_only {
print $" → auto-building ($state.role)..."
do {
image-create $state.role --infra $infra
} catch { |e|
print $" ✗ build failed: ($e.msg)"
}
}
} else {
print $"[OK] ($state.provider)/($state.role) — snapshot: ($state.snapshot_id)"
}
}
print ""
sleep ($interval * 60sec)
}
}