daemon

package
v0.30.0 Latest Latest
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 Go to latest Published: May 13, 2026 License: Apache-2.0 Imports: 26 Imported by: 0

Documentation

Overview

Package daemon implements the long-lived ppz daemon: IPC server, on-disk state, NATS connection, and HTTP client to ppz-server.

Index

Constants

This section is empty.

Variables

View Source 
var ErrCredsRequired = errors.New("credentials required")
View Source 
var ErrUnauthorized = errors.New("daemon.RefreshLoop: unauthorized")

ErrUnauthorized is what RefreshFn returns when the bearer was revoked / expired — distinct from transient network failures (which the loop retries). Triggers OnUnauthorized + stop.

Functions

func Call 

func Call(sock, method string, params, result any) error

Call sends one request to the daemon over a fresh connection and decodes either result or error.

func CursorKey 

func CursorKey(accountID, handle, channel string) string

CursorKey builds the per-channel key from the canonical subject parts.

func IsAlive 

func IsAlive(pid int) bool

IsAlive returns true if the PID-bearing process exists.

func PIDFromHome 

func PIDFromHome(home string) int

PIDFromHome reads $PPZ_HOME/daemon.pid. Returns 0 if absent.

Types

type Credentials 

type Credentials struct {
	URL         string `json:"url"`
	APIKey      string `json:"api_key"`
	AccountID   string `json:"account_id,omitempty"`
	AccountName string `json:"account_name,omitempty"`

	// Auth V2 Phase 3 — short-lived NATS user credentials.
	// Re-fetched periodically by the daemon's refresh goroutine.
	NATSUserJWT  string `json:"nats_user_jwt,omitempty"`
	NATSUserSeed string `json:"nats_user_seed,omitempty"`
}

Credentials are persisted at $PPZ_HOME/credentials (mode 0600). AccountID + AccountName are stored alongside URL+APIKey so a SIGHUP / file-poller reload doesn't drop the resolved org info (the alternative would be re-calling /auth/exchange after every reload).

type Daemon 

type Daemon struct {
	Home    string
	Sock    string
	State   *State
	HTTP    *http.Client
	NC      *nats.Conn // nil until Login
	NATSURL string
	Cursors *cursors

	// Phase 3.5 — JWT refresh loop. Started on Login (and restored
	// in ensureNATS for daemon restarts), holds the latest minted
	// (jwt, seed) for the current org, and re-runs /auth/exchange
	// at exp-30s. nats.Connect's UserJWT callback reads from
	// Refresh.Current() so reconnects pick up fresh credentials.
	// Stopped on Logout / replaced on Login.
	Refresh *RefreshLoop

	// Phase 0 (agent hardening) — short tail of NATS connection-state
	// transitions. Surfaced by `ppz status` (latest state) and
	// `ppz diag` (full ring). Initialised in New() so the handlers
	// registered on the very first nats.Connect have a non-nil ring
	// to append to.
	NATSEvents *NATSEventRing
}

Daemon is the singleton process per $PPZ_HOME.

func New 

func New(home, sock string) *Daemon

func (*Daemon) Run 

func (d *Daemon) Run(ctx context.Context) error

Run runs the daemon in the foreground. Returns when ctx is cancelled or the listener fails.

type NATSEvent added in v0.26.0 

type NATSEvent struct {
	Type   string    `json:"type"`
	At     time.Time `json:"at"`
	Reason string    `json:"reason,omitempty"`
}

NATSEvent is one entry in the daemon's NATS connection-state log. Type is one of "connect", "disconnect", "reconnect", "closed" — matching the nats.go handler set we register. At is the moment the handler fired. Reason captures the error string for disconnect / closed events (empty for the others). Phase 0 is observe-only — these events drive `ppz status` and `ppz diag` output but do not influence reconnect behaviour.

type NATSEventRing added in v0.26.0 

type NATSEventRing struct {
	// contains filtered or unexported fields
}

NATSEventRing is a fixed-capacity, append-only, drop-oldest ring of NATSEvent records. Used by the daemon to surface a recent tail of connection-state transitions through `ppz diag`.

Thread-safe: every accessor takes mu. The ring lives on Daemon and is initialised in New() — before any nats.Connect call — so the handlers we register can append without nil-checking.

func (*NATSEventRing) Append added in v0.26.0 

func (r *NATSEventRing) Append(typ, reason string, at time.Time)

Append records one event. When the ring is full the oldest entry is dropped — diag's value is precisely catching transient events that happened "a few minutes ago", so we keep the tail and lose the head.

func (*NATSEventRing) Snapshot added in v0.26.0 

func (r *NATSEventRing) Snapshot() []NATSEvent

Snapshot returns a copy of the current events in chronological order (oldest first). Safe to retain — the returned slice is independent of the ring's internal storage.

type RefreshFn 

type RefreshFn func(ctx context.Context, accountID string) (jwt, seed string, expUnix int64, err error)

RefreshFn is the work the refresh loop calls when a JWT is about to expire. Implementations re-run POST /api/v1/auth/exchange and return the new (jwt, seed). accountID lets a multi-org daemon route to the right account.

type RefreshLoop 

type RefreshLoop struct {
	AccountID      string
	Refresh        RefreshFn
	OnUnauthorized func(accountID string)
	// contains filtered or unexported fields
}

RefreshLoop monitors one (org, JWT) pair and refreshes it before expiry. Concurrency: Current() may be called from any goroutine; Start/Stop must be called from the same goroutine.

func (*RefreshLoop) Current 

func (r *RefreshLoop) Current() (jwt, seed string)

Current returns the freshest (jwt, seed) — used by nats.UserJWT() callbacks on every NATS (re)connect.

func (*RefreshLoop) LastRefreshAt added in v0.17.0 

func (r *RefreshLoop) LastRefreshAt() time.Time

LastRefreshAt returns when the loop last accepted fresh credentials. Start counts as the first refresh because its credentials came from /auth/exchange immediately before the loop was started.

func (*RefreshLoop) RefreshNowIfDue added in v0.17.9 

func (r *RefreshLoop) RefreshNowIfDue(ctx context.Context, now time.Time) (bool, error)

RefreshNowIfDue refreshes synchronously when the cached credential is already inside its refresh window. It covers machines waking from sleep: the timer goroutine may not have run yet, but the next command must not continue with an expired JWT.

func (*RefreshLoop) Start 

func (r *RefreshLoop) Start(ctx context.Context, jwt, seed string, expUnix int64) error

Start begins the refresh goroutine with an initial credential. expUnix is the JWT's `exp` claim in unix seconds.

func (*RefreshLoop) Stop 

func (r *RefreshLoop) Stop()

Stop halts the refresh goroutine. Idempotent.

type State 

type State struct {
	// contains filtered or unexported fields
}

State is the daemon's in-memory mirror of on-disk credentials + current handle. "current" is keyed by session id (tty / $PPZ_SESSION) so each terminal window has its own current source — same scoping as cursors, avoids the "new terminal silently inherits a stale current set hours ago in another window" footgun.

func NewState 

func NewState(home string) *State

func (*State) AccountID added in v0.30.0 

func (s *State) AccountID() string

func (*State) AccountName added in v0.30.0 

func (s *State) AccountName() string

func (*State) ClearCurrent 

func (s *State) ClearCurrent(session string) error

ClearCurrent drops this session's current. Used by `ppz disconnect`. Idempotent — clearing an already-clear session is a no-op.

func (*State) ClearCurrentForHandle added in v0.21.0 

func (s *State) ClearCurrentForHandle(handle string) error

ClearCurrentForHandle drops every session whose current equals handle. Called after a source destroy so stale per-session pointers don't linger.

func (*State) Credentials 

func (s *State) Credentials() (*Credentials, bool)

func (*State) Current 

func (s *State) Current(session string) string

func (*State) ForgetPipe added in v0.21.0 

func (s *State) ForgetPipe(handle string)

ForgetPipe removes a handle from the known-pipes cache. Called after a source is destroyed so the cache doesn't return stale hits.

func (*State) Home 

func (s *State) Home() string

func (*State) KeyPrefix 

func (s *State) KeyPrefix() string

func (*State) KnowsPipe 

func (s *State) KnowsPipe(handle string) bool

func (*State) LoadFromDisk 

func (s *State) LoadFromDisk() error

LoadFromDisk reads credentials and current from $PPZ_HOME. Called at startup and on SIGHUP. Missing files mean "not logged in" / "no current".

`current.json` is the session→handle map. The legacy plain-text `current` file (pre-per-session) is migrated into session "default" if both exist.

func (*State) LoginCheck 

func (s *State) LoginCheck() string

LoginCheck returns the cached server-validation result. "" means "not observed yet" — callers (e.g. status) should probe.

func (*State) RememberPipe 

func (s *State) RememberPipe(handle string)

func (*State) ResetPipes 

func (s *State) ResetPipes(handles []string)

func (*State) SetAccountID added in v0.30.0 

func (s *State) SetAccountID(id string)

func (*State) SetCurrent 

func (s *State) SetCurrent(session, handle string) error

func (*State) SetLogin 

func (s *State) SetLogin(creds Credentials, accountID, accountName, keyPrefix string) error

func (*State) SetLoginCheck 

func (s *State) SetLoginCheck(state string)

SetLoginCheck records the latest server-validation result. Called from callServer based on response status. Idempotent — same value twice is fine, but transitions (ok→invalid, invalid→ok) are kept.

Source Files

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