gunnar-server 2.0.0

//! The gunnar git server: everything that used to live behind gunnar-cli's
//! `--features server`, now its own crate.
//!
//! Nothing in here may reach `gunnar-client` except the `client`-gated
//! [`mirror`] module (replication's send-pack). That edge is what would drag
//! gix's worktree, status and index machinery into an appliance image, and it
//! is asserted absent from a resolved dependency graph in
//! `gunnar-cli/tests/feature_split.rs`.
#![doc(html_logo_url = "https://gunnar.rs/download/gunnar.webp", html_favicon_url = "https://gunnar.rs/download/favicon.svg")]

/// **The allocator every gunnar that serves is built on.**
///
/// A `#[global_allocator]` is the *executable's* to choose — `bench`'s
/// `stages.rs` says so in its own header, and cargo enforces it: two of them in
/// one binary is a hard error. So this crate does not install one. It publishes
/// the *choice* as a type, and each serving binary spends one line on the
/// declaration:
///
/// ```ignore
/// #[global_allocator]
/// static ALLOC: gunnar_server::ServerAllocator = gunnar_server::SERVER_ALLOCATOR;
/// ```
///
/// That is one implementation applied to the heap with the grain of the language rather than
/// against it. The choice lives in exactly one place, so the appliance, the
/// `gunnar-solo`/`gunnar-service` builds and the bench's `git-store-serve`
/// cannot drift onto different allocators — and `bench`'s counting probes,
/// which must install a wrapper of their own, wrap *this* rather than `System`,
/// so `alloc_mib_*` describes the allocator that actually ships. Installing it
/// in the library instead looks tidier for exactly as long as it takes someone
/// to build a probe: it collided with `stage-probe`'s `CountingAlloc` on the
/// first compile.
///
/// The type is defined either way — `System` when the feature is off — so no
/// declaration site needs a `#[cfg]`.
///
/// # Why, with the numbers
///
/// znippy's resolver used to retain its whole read arena. Freeing it
/// (`znippy 0f14d9b`) took anon-after-seed from 4481 MB to 438 MB and
/// **cost 78% on clone CPU** — 1.47 s to 2.62 s on a 352 396-object clone.
/// The obvious reading is that the eviction forces re-resolution. It does
/// not; the clone path never calls the resolver. The retained arena was an
/// accidental *pre-warmed malloc pool* for the clone's own ~2 GB of
/// allocations, and giving it back put glibc's `malloc` on the critical path
/// for every clone thereafter. Bisected: a build that frees but does not
/// refcount reproduces the whole regression, so the cost is the not-leaking,
/// not the counting.
///
/// Four-way grid, one box, interleaved, quiet, steady state:
///
/// | resolver | allocator | clone CPU | anon after seed |
/// |---|---|---:|---:|
/// | leaking | glibc | 1.47 s | 4481 MB |
/// | freeing | glibc | 2.62 s | 438 MB |
/// | leaking | mimalloc | 1.18 s | 1767 MB |
/// | **freeing** | **mimalloc** | **1.17 s** | **701 MB** |
///
/// The last row beats the leaking build's best cell on *both* axes at once,
/// and with a competent allocator the two resolvers are within 0.01 s — the
/// regression was never in znippy. It is user-space allocator cost and not
/// page faults: system time is identical (0.14 s) and suppressing trim with
/// `M_TOP_PAD` removed 20 762 faults while moving CPU by 0.04 s.
///
/// Opt out with `--no-default-features`; see this crate's manifest for what
/// that buys and what the dependency budget does and does not actually forbid.
#[cfg(feature = "mimalloc")]
pub type ServerAllocator = mimalloc::MiMalloc;

/// The value to declare. See [`ServerAllocator`].
#[cfg(feature = "mimalloc")]
pub const SERVER_ALLOCATOR: ServerAllocator = mimalloc::MiMalloc;

/// `System`, because the `mimalloc` feature is off. See [`ServerAllocator`] for
/// what that costs — on the measured clone it is 2.2x the CPU.
#[cfg(not(feature = "mimalloc"))]
pub type ServerAllocator = std::alloc::System;

/// The value to declare. See [`ServerAllocator`].
#[cfg(not(feature = "mimalloc"))]
pub const SERVER_ALLOCATOR: ServerAllocator = std::alloc::System;

pub mod admin;
/// **The appliance identity ceremony** — load-or-mint the WireGuard keypair on
/// the durable data root, emit the ONE canonical identity line every product
/// in the fleet emits, and refuse (never re-mint) a corrupt one. A thin caller
/// of `wg_appliance_core::appliance`, shared with holger and korp. Gated on
/// `GUNNAR_APPLIANCE=1`, which the `[[build.installer]]` declaration carries.
///
/// Behind `wg-client` with [`wg`]: the ceremony mints a WIREGUARD keypair and
/// exists to serve the tunnel, so a binary built without the tunnel has
/// nothing to mint and no reason to link `wg_appliance_core`.
#[cfg(feature = "wg-client")]
pub mod appliance;
pub mod attest;
/// The LFS tee: an object is a transaction-log frame before it is published.
pub mod txlog_lfs;
/// The twin: follows the primary's transaction log, applies it, restores from it.
pub mod twin;
/// The twin's mutual-TLS credential: minted at pairing, never on the medium.
pub mod twin_tls;
pub mod tunnel_addr;
/// **The declared budgets** — concurrent transfers, open repository handles and
/// the git memory budget — derived from cores + `RLIMIT_NOFILE` + `MemAvailable`
/// and named in one INFO row at start. The replacement for the three emergent
/// ceilings of 2026-08-29 (`19`, `25`, `256`).
pub mod budget;
/// **`Admin.Capacity`: "if a tenant's cap rose to N bytes, could you serve
/// it?"** — the question monetize must ask before it buys a disk. Answers with
/// a verdict measured off the SAME `statvfs` the push door refuses under, and,
/// independently, whether this data set can ever grow at all: the appliance is
/// SEALED (an md set laid once at install, no runtime growth path, PID 1 with
/// no shell), so a disk bought for it is billed and invisible.
pub mod capacity;
pub mod control_plane;
/// **The runtime data-set growth** (`DATA-SET-GROWTH-FLOW.md` §3): the phase
/// machine over a `World` seam, the go-ahead, and — with `grow-runtime` — the
/// appliance world that links edda's engine.
pub mod grow;
/// The VGA-console status screen the appliance draws as PID 1 (header band +
/// rolling events off the log tap).
pub mod dashboard;

/// **What emptying an account means**, in one place: the four classes of
/// bytes a user owns and the walk that reclaims them.
pub mod account_purge;
/// The account audit logs' retention sweep (2026-10-05).
pub mod account_audit_sweep;
/// **One worker, one job at a time, FIFO, deduplicated by subject** — the
/// runner `gc_queue` and `purge_queue` are two kinds on, and the hook a third
/// kind plugs into without editing it.
pub mod job_queue;
/// **One gc at a time, for the whole box** — the queue behind `Repos.Gc`.
pub mod gc_queue;
/// **One account purge at a time, and the lockout always comes off.** The
/// `Accounts.Purge` queue; see its module docs for why it is its own line and
/// not the gc one.
pub mod purge_queue;
/// **One mirror sync at a time, for the whole box** — the third kind on the one
/// runner, and the queue behind `Mirror.Sync`.
pub mod mirror_queue;
/// **What a mirror sync does**: one `gunnar-wire` `fetch_pack` over one of two
/// transports, and one compare-and-swap that moves the references.
pub mod mirror_fetch;
/// **Smart HTTP for the fetch side**, as the `BufRead`/`Write` pair
/// `fetch_pack` takes. The adapter that turns a request/response protocol back
/// into a stream.
#[cfg(feature = "mirror-http")]
pub mod mirror_http;
pub mod grpc_gate;
/// The tree diff `Refs.Diff` serves. Its own module because it is an algorithm
/// with an opinion about what it will not compute, and that opinion needs
/// somewhere to be written down.
/// An encrypted repository's push, checked before a byte of it is kept (crypt-level2 item 4).
/// It lives in [`storage`] (it walks the pushed pack with the znippy engine's own reader, and
/// the engine is named there and nowhere else — xtask `Rule::EngineByName`); its path stays.
#[cfg(feature = "engine-znippy")]
pub use storage::encrypted_quarantine;
pub mod diff;
/// Whole-file blame: `verify`'s line→commit link 1, done once for every line of
/// a file. Reuses `verify`'s tree/blob and parent readers and the `diff`
/// engine (one implementation).
pub mod blame;
/// Latest-revision literal code search: walk the tree at a ref, scan text
/// blobs. Bounded by a file-size and a match ceiling; not a persistent index.
pub mod search;
/// A hand-built in-memory git for the `blame` and `search` tests, so their
/// assertions name oids the test chose rather than trusting the answer.
#[cfg(test)]
#[cfg(test)]
mod testgit;
/// A repository's first commit, written by the server (`Repos.Create{readme}`).
pub mod first_commit;
/// The start-up disk test the appliance runs on /data (seq write/read, 4 KiB
/// fsync ops) — one `disktest` row on the screen.
pub mod durable;
pub mod disktest;
/// The machine at a glance (`StorageReality.glance`, 2026-10-04): the Machine card's lines, decided here.
pub mod glance;
/// `Admin.Topology`'s facts from this server: the pairing feed, the front's principals, the plugin registration (2026-10-04).
pub mod topology;
/// **The metered appliance** (the metered plan): the paid state per
/// namespace — verified, logged, stored, and read by the front doors. Compiled
/// only with the `metered` feature; see `Cargo.toml` for the doctrine.
#[cfg(feature = "metered")]
pub mod entitlement;
/// **The key that signs an actor ticket**: the appliance's word that one human
/// may act for one tenant. Its own key, minted at runtime into the secret
/// store, signing raw Ed25519 because the verifier on the far side of the
/// monetize seam is `monetize_embed`'s and not SSH's. Metered only — the
/// community appliance carries no service that would spend one.
#[cfg(feature = "metered")]
pub mod actor_ticket;
/// The descriptor limit: raised once (PID 1 to a million, anyone else to its
/// hard limit), and the open-repository handle cache sized to fit under it.
/// The fix for the rig's "202nd repository" `EMFILE` (2026-08-29).
pub mod limits;
/// The artifact registry and the OCI images it holds.
pub mod oci;
/// Gunnar's end of PID 1. The jobs an operating system used to do for the
/// server (signals, reaping, the network, DHCP, the stop and the power-off)
/// are edda's `appliance-pid1`, shared with Holger; this is what Gunnar says
/// about itself to it (`GUNNAR_NET`, the host name, the narration tap, GN-99).
pub mod boot;
/// **The fifth** of those jobs, added 2026-09-23: saying where the boot is.
/// `boot::ship_boot_narration` ends at `end of hand-off` and the estate's twin
/// died in the silence after it; this is the narrator that speaks from there
/// on — a stage line at every boundary, a tick a minute, and a fatal fault that
/// sends a stable code, waits to be heard and then powers the box off cleanly.
pub mod narrate;
pub mod stop_record;
/// **The fourth** of those jobs, added 2026-09-14: the wall clock. The appliance
/// booted two hours fast and refused every genuine credential and every Stripe
/// webhook for it; UDP/123 is closed on that network, so "now" arrives in the
/// `Date` header of an HTTPS response, from three sources that must agree.
pub mod clock;
/// **The boot window**: whether the stores have finished their post-crash work,
/// and the retryable `starting` answer a client gets until they have. The
/// 0.6-0.7 s of `the repository is unavailable; try again` after a power cut.
pub mod readiness;
/// The registry's one rule: no artifact without valid, logged provenance.
pub mod registry;
/// The build runner: checkout, sandbox, artifacts, signed provenance.
pub mod runner;
/// The build sandbox: a network namespace of the build's own, unprivileged.
pub mod sandbox;
/// The counters over HTTP. Opt-in; binds nothing by default.
pub mod scrape;
pub mod serve;
/// **The layout config** (`/boot/korp/layout.conf`): what the installer
/// decided, written down and sealed by the thing that did the deciding. gunnar
/// is TOLD where its storage is and obeys; it never surveys disks, an absent
/// config is answered as absent rather than inferred, and an unsigned one is
/// never presented as verified.
pub mod layout_config;
/// **The slow disk** (`/serialdat`): the other spindle, and the other failure
/// domain. One code path whatever is underneath it, and a three-valued claim —
/// off-stripe, same-device, unverified — over the three copies that are
/// supposed to outlive losing a data disk.
pub mod slow;
/// How gunnar reaches a company's identity provider (company SSO).
#[cfg(feature = "sso-egress")]
pub mod sso_egress;
/// The znippy cold tier, wired where objects enter the server.
pub mod storage;
pub mod push_space;
pub mod stores;
/// **The usage ledger** (2026-10-06): every namespace's stock meters, re-measured
/// only where something changed — what `UsageBatch.ReadMany` answers from.
pub mod usage_ledger;
/// **Can this control plane be moved onto mutual TLS, and who does it cost?**
/// The one preflight `gunnar serve --grpc-tls-self` refuses on and
/// `gunnar issuer readiness` asks in advance.
pub mod tls_preflight;
pub mod transport;
/// `gunnar verify` — the unbroken chain, walked backwards from a line of source.
pub mod verify;
/// **WireGuard**, so the appliance has an address that outlives its DHCP lease.
/// USERSPACE and compiled in (`wg-appliance-core`/boringtun), so it needs no
/// `wireguard` kernel module and works whatever the packed kernel thinks about
/// `CONFIG_WIREGUARD` — only `/dev/net/tun`, which is builtin. The tunnel
/// address goes on through `appliance_pid1::net::apply`, the same netlink writer every other
/// address does. Off unless the data root carries a `wg0.conf`.
///
/// Behind `wg-client`. With the feature off `wg-appliance-core` leaves the
/// dependency graph and boringtun's crypto tail (x25519-dalek,
/// chacha20poly1305, blake2, ring) goes with it — which is what an appliance
/// customer who unticks "WireGuard" is buying.
#[cfg(feature = "wg-client")]
pub mod wg;
/// The pairing loop PID 1 runs itself (nordisk-pairing) — see the module.
#[cfg(feature = "wg-client")]
pub mod pairing;
/// The installer's feed at rest: sealed, owner-only (h-feed-at-rest).
#[cfg(feature = "wg-client")]
pub mod fed_at_rest;
/// The principals the installer feeds (`principal.<id>`), installed by the
/// primary itself right after its fed admin — see the module.
#[cfg(feature = "wg-client")]
pub mod fed_principals;
/// The installer's mTLS endpoint on this VM (edda nordisk-pairing 0.3): the
/// bootstrap listener, the boot log the installer collects, the fresh-install reset.
#[cfg(feature = "wg-client")]
pub mod installer_listener;
/// **Live update** (owner 2026-10-12): what this box runs, a new app staged, the graceful
/// re-exec, the confirm — generic primitives over korp-installer's `live`.
pub mod live_update;
/// DEV-NARRATE (Skidbladnir nordisk-narrate): this box's boot log, sealed to
/// the installer's key, over UDP before the installer's link exists. A DEV
/// build only — no release row names the feature.
#[cfg(feature = "dev-narrate")]
pub mod dev_narrate;
/// The estate values the installer's door feeds (monetize key, clock key and peer),
/// taken instead of the medium's — see the module.
pub mod feed;

/// Whether a smart-HTTP credential may arrive over cleartext. Re-exported
/// from `gunnar-http` so `gunnar-cli`'s `serve` dispatch can name it without a
/// direct `gunnar-http` dependency of its own.
#[cfg(feature = "http")]
pub use gunnar_http::Cleartext;

/// **Dispatch a server verb.** The one entry point both this crate's binary and
/// `gunnar-cli`'s `run()` route server commands through, so the wiring lives
/// exactly once (one implementation).
///
/// The trailing catch-all is there only so this compiles inside a `gunnar-solo`
/// build, where feature unification gives [`gunnar_common::cli::Command`] the
/// client/control variants too. It is never reached: a server-only binary has no
/// other variants, and `gunnar-cli` routes only the server ones here.
///
/// # It also closes the stores, and that is why the dispatch is wrapped
///
/// [`storage::shutdown`] runs on the way out, on the error path as well as the
/// success path. Being *the* server dispatch is what makes one call site enough:
/// `gunnar-server`'s `main` and every `gunnar-cli` binary's server verbs both
/// arrive here, so neither `main` has to remember. Both of those `main`s end in
/// `std::process::exit(1)` on error, which unwinds nothing and drops nothing —
/// hence a call, before the value is returned to them, rather than a guard.
///
/// See [`storage::shutdown`] and `storage::znippy_engine::shutdown` for what is
/// being released and what it costs not to.
pub fn run(
    data_root: std::path::PathBuf,
    command: gunnar_common::cli::Command,
) -> anyhow::Result<()> {
    let outcome = dispatch(data_root, command);
    storage::shutdown();
    outcome
}

fn dispatch(
    data_root: std::path::PathBuf,
    command: gunnar_common::cli::Command,
) -> anyhow::Result<()> {
    use gunnar_common::cli::Command;

    match command {
        Command::Serve(args) => {
            use std::sync::Arc;

            let stores = Arc::new(stores::ServerStores::open(&data_root)?);
            let wire = transport::WireConfig::from_serve_args(&args)?;
            // **The installer's feed** (`crate::feed`): the values the join door
            // fed, persisted by the pairing loop to `<data>/pairing/joined.toml`
            // on an earlier boot. Published for the clock (which reads it on
            // every sync) and resolved against the medium's monetize key below.
            let fed_at_start = crate::feed::load_at_start(&data_root);
            let fed_monetize = fed_at_start.as_ref().and_then(|f| f.monetize_pubkey.clone());
            #[cfg(not(feature = "metered"))]
            if let Some(key) = &fed_monetize {
                anyhow::bail!(
                    "REFUSED [pairing-feed-monetize-open-build] the installer's door fed monetize key {key}, \
                     but this gunnar-server was built without the `metered` feature and contains no \
                     entitlement code at all; it would serve every namespace Free. Build the \
                     `gunnar-server-metered` variant, or stop the front feeding `monetize_pubkey`."
                );
            }
            #[cfg(not(feature = "metered"))]
            crate::feed::record_monetize_in_force(None);
            // `--monetize-pubkey` on a build that cannot honour it is refused BY
            // NAME, the `GUNNAR_NET=:dhcp` rule (`appliance_pid1::net::NetConfig::parse`): a
            // box told to bill by a binary that cannot must stop, not boot Free.
            #[cfg(not(feature = "metered"))]
            if let Some(key) = &args.monetize_pubkey {
                anyhow::bail!(
                    "--monetize-pubkey {key} was given, but this gunnar-server was built without \
                     the `metered` feature and contains no entitlement code at all; it would \
                     serve every namespace Free. Build the `gunnar-server-metered` variant."
                );
            }
            // And the mirror of that refusal on the metered side: NO DEFAULT
            // URL. This used to read `.unwrap_or("https://gunnar.rs/billing")`,
            // which put the builder's own page into every other builder's
            // binary — a metered gunnar with a forgotten flag pointed its
            // tenants at Vetra. `load` refuses instead, by flag name; see
            // `MeteredConfig::load` for why a missing link is not tolerable.
            // The medium's key (`--monetize-pubkey`) against the door's fed one:
            // either alone is taken, both must agree (`feed::resolve_monetize`
            // refuses a disagreement by name). `--billing-url` with no key from
            // EITHER source is refused here — the rule clap's `requires` used
            // to make before the key could arrive from the door.
            #[cfg(feature = "metered")]
            let metered = {
                // `fed` (the constant medium, 2026-09-24 evening): the medium
                // carries no key and SAYS so — the door feeds it. Until it has
                // (the first boot, before the join) the server starts KEYLESS
                // and the key applies LIVE when it arrives (`feed::monetize_arrived`,
                // owner 2026-09-25: avoid restarts); a later start reads it from
                // joined.toml.
                let awaits_feed = args.monetize_pubkey.as_ref().is_some_and(|k| k.is_fed());
                let medium = match &args.monetize_pubkey {
                    Some(key) if key.is_fed() => None,
                    Some(key) => Some(entitlement::read_pubkey(key)?),
                    None => None,
                };
                let resolved = crate::feed::resolve_monetize(medium, fed_monetize.as_deref())
                    .map_err(|why| anyhow::anyhow!(why))?;
                if medium.is_none() && resolved.is_some() {
                    tracing::info!("monetize key: from the installer's feed (<data>/pairing/joined.toml); the medium carries none");
                }
                crate::feed::record_monetize_in_force(resolved);
                match resolved {
                    None if awaits_feed => {
                        tracing::warn!(
                            "monetize key: the medium says `{}` — the installer's door feeds it, and it has not yet \
                             (first boot, before the join). Enforcing NOTHING until it arrives; it then applies in \
                             place, with no restart",
                            gunnar_common::monetize_key::FED
                        );
                        let mut cfg = entitlement::MeteredConfig::awaiting_feed(args.billing_url.as_deref())?;
                        cfg.vital = args.monetize_vital;
                        Some(cfg)
                    }
                    Some(key) => {
                        let mut cfg = entitlement::MeteredConfig::load(
                            &gunnar_common::monetize_key::MonetizePubkey::Literal(key),
                            args.billing_url.as_deref(),
                        )?;
                        cfg.vital = args.monetize_vital;
                        Some(cfg)
                    }
                    None if args.billing_url.is_some() => anyhow::bail!(
                        "--billing-url (GUNNAR_BILLING_URL) was given, but no monetize key: neither \
                         --monetize-pubkey (GUNNAR_MONETIZE_PUBKEY) on the medium nor `monetize_pubkey` \
                         fed by the installer's door. A pay page with no key to verify facts with \
                         bills nobody."
                    ),
                    None => None,
                }
            };
            // The community plan gate's floor. Parsed here, once, so a typo is a
            // startup error with the flag's name in it and not a gate that
            // silently runs on the default.
            let disk_floor = gunnar_ssh::DiskFloor::parse(&args.disk_floor)
                .map_err(|err| anyhow::anyhow!(err))?;
            // The usage share's settings, parsed here for the same reason: a
            // typo in `--admit-limit` is a startup error naming the flag.
            #[cfg(feature = "admit-share")]
            let admit = admit_settings(args.admit_limit.as_deref(), args.admit_window_days)?;
            let config = serve::ServeConfig {
                ssh_bind: args.ssh_bind,
                disk_floor,
                grpc_bind: args.grpc_bind,
                grpc_bind_device: None,
                admin_key: args.admin_key.clone(),
                restore_pubkeys: args.restore_pubkeys.clone(),
                no_grpc: args.no_grpc,
                wg_only: args.wg_only,
                twin_role: args.role == gunnar_common::cli::ServeRole::Twin,
                allow_anonymous: !args.no_anonymous,
                anonymous: match args.anonymous {
                    gunnar_common::cli::AnonymousArg::Allow => gunnar_ssh::AnonymousPolicy::Allow,
                    gunnar_common::cli::AnonymousArg::Refuse => gunnar_ssh::AnonymousPolicy::Refuse {
                        browse_host: args.browse_host.clone(),
                    },
                },
                max_concurrent_transfers: args.max_concurrent_transfers,
                memory_budget_bytes: args.git_memory_bytes,
                admission_wait: args.admission_wait_ms.map(std::time::Duration::from_millis),
                max_transfers_per_principal: args.max_transfers_per_principal,
                max_anonymous_transfers: args.max_anonymous_transfers,
                #[cfg(feature = "admit-share")]
                admit,
                per_principal_limit_is_hard: args.hard_per_principal_limit,
                max_object_bytes: args.max_object_bytes,
                metrics_bind: args.metrics_bind,
                // I11's passive heartbeat. `map` and not a bare struct: the
                // three tuning flags carry `default_value_t`, so they are always
                // present, and it is `--watch-primary` alone that decides
                // whether a watchdog exists at all.
                #[cfg(feature = "replication")]
                standby_watch: args.watch_primary.map(|primary| {
                    crate::standby_watch::StandbyWatch {
                        primary,
                        probe_interval: std::time::Duration::from_millis(args.watch_probe_ms),
                        connect_timeout: std::time::Duration::from_millis(args.watch_connect_ms),
                        promote_after: args.watch_promote_after,
                    }
                }),
                // 5.4: the boot check runs on every box with replication (it only
                // SAYS unless `--repair-auto`); the pull channel only with `--fleet`.
                #[cfg(feature = "replication")]
                repair: Some(crate::repair::RepairConfig {
                    auto: args.repair_auto,
                    key: args.repair_key.clone(),
                    twin: args.repair_twin.clone(),
                    // The medium's flags, or the installer's feed (the front hands every box
                    // the ONE's door, M-D35); both and different refuses to start.
                    fleet: crate::repair::resolve_fleet(match (&args.fleet, &args.fleet_instance) {
                        (Some(url), Some(instance)) => Some(crate::repair::FleetConfig {
                            url: url.clone(),
                            ca: args.fleet_ca.clone(),
                            ca_pem: None,
                            at: None,
                            instance: instance.clone(),
                            role: args.fleet_role.clone().unwrap_or_default(),
                            monetize_pubkey: args.monetize_pubkey.as_ref().and_then(|k| k.literal()),
                            every: std::time::Duration::from_secs(args.fleet_every_s.max(1)),
                        }),
                        (Some(_), None) => anyhow::bail!("--fleet needs --fleet-instance (GUNNAR_FLEET_INSTANCE): the estate this box reports for"),
                        _ => None,
                    }, fed_at_start.as_ref(), std::time::Duration::from_secs(args.fleet_every_s.max(1)))
                    .map_err(|why| anyhow::anyhow!(why))?,
                }),
                #[cfg(feature = "http")]
                http_bind: args.http_bind,
                #[cfg(feature = "http")]
                http_cleartext: if args.http_allow_cleartext_credentials {
                    Cleartext::Allowed
                } else {
                    Cleartext::RequireProxyTls
                },
                #[cfg(feature = "http")]
                http_tls: if args.http_tls_self {
                    Some(serve::HttpTls::SelfMinted)
                } else if let (Some(cert), Some(key)) = (&args.http_tls_cert, &args.http_tls_key) {
                    Some(serve::HttpTls::Identity(gunnar_http::TlsIdentity {
                        cert_chain_pem: std::fs::read_to_string(cert)
                            .map_err(|e| anyhow::anyhow!("reading {}: {e}", cert.display()))?,
                        key_pem: std::fs::read_to_string(key)
                            .map_err(|e| anyhow::anyhow!("reading {}: {e}", key.display()))?,
                    }))
                } else {
                    None
                },
                grpc_tls: if args.grpc_tls_self {
                    Some(serve::GrpcTls::SelfMinted)
                } else {
                    None
                },
                web_relying_parties: args.web_relying_party.clone(),
                web_require_user_verification: args.web_require_user_verification,
                grpc_replication_bind: args.grpc_replication_bind,
                runner: args.runner.then(|| runner::WatchConfig {
                    // `requires_all` on the flag makes both present; the
                    // `expect` names which invariant is being leaned on rather
                    // than defaulting to a path nobody chose.
                    workspace: args
                        .runner_workspace
                        .clone()
                        .expect("--runner requires --runner-workspace"),
                    builder: args
                        .runner_builder
                        .clone()
                        .expect("--runner requires --runner-builder"),
                    allow_network: args.runner_allow_network,
                    refs: Vec::new(),
                    max_builds: None,
                }),
                wire,
                #[cfg(feature = "metered")]
                metered,
                ..serve::ServeConfig::default()
            };
            // The runtime is built by `serve` rather than with `#[tokio::main]`
            // so the blocking-pool size, which used to be the server's accidental
            // concurrency ceiling, is a named constant next to the limit
            // it has to stay above rather than a tokio default nobody chose.
            serve::runtime()?.block_on(serve::run(stores, config, args.check))
        }

        Command::Namespace(command) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::namespace(&stores, command)
        }
        Command::Repo(command) => {
            // **`archive-out` must work while the server is running**, and
            // `ServerStores::open` takes redb's exclusive lock on
            // `control.redb` — a live server holds it, so opening the stores
            // here would make the one verb a backup needs the one verb a
            // serving box cannot run. It does not need them: an archive is
            // three files under `repos/<ns>/<name>.git` and the path resolver
            // is the same sandbox the SSH listener uses.
            #[cfg(feature = "engine-znippy")]
            if matches!(command, gunnar_common::cli::RepoCommand::ArchiveOut { .. }) {
                return admin::repo_archive_out_without_stores(&data_root, command);
            }
            let stores = stores::ServerStores::open(&data_root)?;
            admin::repo(&stores, command)
        }
        Command::Principal(command) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::principal(&stores, command)
        }
        Command::Issuer(command) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::issuer(&stores, command)
        }
        Command::Key(command) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::key(&stores, command)
        }
        Command::Token(command) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::token(&stores, command)
        }
        Command::Attest(command) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::attest(&stores, command)
        }
        Command::Verify(args) => admin::verify(&data_root, args),
        Command::Blame(args) => admin::blame(&data_root, args),
        Command::Search(args) => admin::search(&data_root, args),
        Command::Build(command) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::build(&stores, command)
        }
        Command::Forge(command) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::forge(&stores, command)
        }
        Command::Registry(command) => {
            let stores = std::sync::Arc::new(stores::ServerStores::open(&data_root)?);
            admin::registry(&stores, command)
        }
        Command::Grant(args) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::grant(&stores, args)
        }
        Command::Revoke(args) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::revoke(&stores, args)
        }
        Command::Gc(args) => {
            let stores = stores::ServerStores::open(&data_root)?;
            admin::gc(&stores, args)
        }
        // No `ServerStores::open`: that opens `control.redb`, and redb takes an
        // exclusive file lock a running server already holds. Reading history
        // must touch nothing but the repository. (Until 2026-08-10 the lock this
        // named was the control *repository*'s; the sentence survives the
        // migration because the control database takes one of its own —
        // one process per store root — and this verb has to run against a live server.)
        Command::Reflog(args) => admin::reflog(&data_root, args),
        // No stores at all: minting a key touches nothing this server owns.
        #[cfg(feature = "wg-client")]
        Command::Wg(command) => wg::keygen_verb(command),
        // Built without the tunnel, so there is no keypair to mint and no
        // implementation to mint it with. An HONEST REFUSAL naming the missing
        // feature, never the generic "only server commands" below: an operator
        // typing `gunnar wg` at a binary that was deliberately built without
        // WireGuard must be told THAT, not left to wonder about a typo.
        #[cfg(not(feature = "wg-client"))]
        Command::Wg(_) => anyhow::bail!(
            "this binary was built WITHOUT the `wg-client` feature: it contains no \
             WireGuard implementation, so `gunnar wg` has no keypair to mint. Rebuild \
             with --features wg-client, or use a build that has it."
        ),

        #[allow(unreachable_patterns)]
        _ => anyhow::bail!("gunnar-server handles only server commands"),
    }
}

/// Replication to a second gunnar. **On the appliance since
/// 2026-08-30.**
///
/// The push half is `gunnar-client`'s send-pack, proved against the real
/// `git receive-pack` binary, and writing a second one here to keep a dependency
/// edge clean would trade one implementation for a graph assertion. The gate used to be the
/// `client` feature, which is why this doc comment used to end *"the appliance
/// build does not replicate yet … closing the gap is a manifest change"*.
///
/// It was that manifest change, and it has landed. `gunnar-client` and
/// `nornir-git` each put their gix porcelain behind a default-on `porcelain`
/// feature, so the WIRE half — send-pack, the russh dialler, the ref plan —
/// resolves alone, and the gate is now `replication`. MEASURED 2026-08-30,
/// `cargo tree -p gunnar-server -e normal`: **365** packages without it,
/// **369** with it, against **493** under the old all-or-nothing `client`.
/// `.nornir/build-variants.toml`'s `gunnar-server` row names the feature, so the
/// packed appliance carries it; the two-appliance drill exercises it.
#[cfg(feature = "replication")]
pub mod mirror;
/// **I11's passive heartbeat**: the standby half of failover, which notices a
/// primary that died without abdicating and takes over by itself. Off unless a
/// `--watch-primary` says otherwise — `control_plane.rs` states the rule it
/// obeys, that naming a new primary is a decision and never a default.
#[cfg(feature = "replication")]
pub mod standby_watch;
/// **The estate repairs itself** (5.4): the boot check (auto-fix OFF by default)
/// and the pull channel to monetize, both through `gunnar-repair` — see the module.
#[cfg(feature = "replication")]
pub mod repair;

/// S10: the main mails a sold estate's resend sign-in link itself — see the module. Only a
/// build that pulls the order (`fleet-pull`) mails it.
#[cfg(feature = "fleet-pull")]
pub mod postman;

/// G16-d: a sold estate's paid data step, pulled (`grow_go_ahead`) — the box's half.
#[cfg(feature = "replication")]
pub mod paid_growth;
/// `Report.product` (ONE monetize, G1 pull): the main's own word about its product.
#[cfg(feature = "replication")]
pub mod product_report;
pub mod replication_view;

/// **Outbound webhooks: delivery to an external URL.** A subscriber to the
/// same bus the replicator consumes, gated behind the `webhooks` feature — off,
/// `ControlPlane`'s default bodies refuse the verbs by name.
#[cfg(feature = "webhooks")]
pub mod webhook;

/// **Replication's configuration, over the control plane.** The seam between
/// [`mirror`] (which knows nothing about gRPC) and [`control_plane`] (which
/// knows nothing about replication's types).
///
/// Behind `replication` for the same reason [`mirror`] is: with the feature off
/// there is nothing to configure, and `ControlPlane`'s default bodies refuse the
/// three verbs by name.
#[cfg(feature = "replication")]
pub mod replication_wire;

/// **Record one functional-status row for the nornir test matrix.**
///
/// Wraps `nornir_testmatrix::functional_status` behind the `testmatrix`
/// feature — a compiled-out `#[inline]` no-op otherwise, with no nornir edge in
/// a release appliance. The appliance rollup
/// (`edda/crates/nornir-testmatrix/src/appliance.rs`) folds rows whose
/// `component` is `"<product>-appliance"` (host form) or
/// `"<product>-appliance/<form>"`, so the ONE string gunnar's host form spells
/// is `"gunnar-appliance"`. Same shim as holger `server/cli/src/main.rs:1095`.
#[inline]
pub fn functional_status(component: &str, check: &str, ok: bool, detail: &str) {
    #[cfg(feature = "testmatrix")]
    nornir_testmatrix::functional_status(component, check, ok, detail);
    #[cfg(not(feature = "testmatrix"))]
    {
        let _ = (component, check, ok, detail);
    }
}

pub use attest::{AttestationLog, ATTESTATION_LOG};
pub use control_plane::CoreControlPlane;
pub use grpc_gate::{activity_ledger, control_audit_ledger, control_transfer_gate};
#[cfg(feature = "replication")]
pub use mirror::{
    ReplicationConfig, ReplicationCounters, ReplicationScope, ReplicationTarget, Replicator,
    TargetStatus, VisibilityScope,
};
pub use serve::{GrpcTls, ServeConfig, Server};
pub use stores::{ServerStores, CONTROL_DB, CONTROL_DIR};
pub use transport::{WireConfig, WireTransport};

/// **`--admit-limit` / `--admit-window-days` → the usage share's settings.**
/// Absent flags take `edda_admit::Settings::default()`; `none` is PassThrough.
/// A typo is a startup error naming the flag.
#[cfg(feature = "admit-share")]
pub fn admit_settings(
    limit: Option<&str>,
    window_days: Option<u32>,
) -> anyhow::Result<gunnar_ssh::edda_admit::Settings> {
    let mut settings = gunnar_ssh::edda_admit::Settings::default();
    if let Some(limit) = limit {
        settings.limit = gunnar_ssh::edda_admit::parse_bytes(limit)
            .map_err(|err| anyhow::anyhow!("--admit-limit (GUNNAR_ADMIT_LIMIT): {err}"))?;
    }
    if let Some(days) = window_days {
        anyhow::ensure!(days > 0, "--admit-window-days (GUNNAR_ADMIT_WINDOW_DAYS) must be at least 1");
        settings.window_days = days;
    }
    Ok(settings)
}