commands.zig

1// commands.zig — all command handlers2// Orchestrates exec/api/output. Zero direct stdout writes.3const std = @import("std");4const builtin = @import("builtin");5const types = @import("types.zig");6const errors = @import("errors.zig");7const config = @import("config.zig");8const output = @import("output.zig");9const exec = @import("exec.zig");10const api = @import("api.zig");11const search_tui = @import("search.zig");12const version = @import("version.zig");1314const UPDATE_URL = "https://kepr.uk/api/nina/releases/latest";1516pub const Ctx = struct {17    gpa: std.mem.Allocator,18    io: std.Io,19    environ: *const std.process.Environ.Map,20    machine: types.Machine,21    cfg: types.NinaConfig,22    args: []const []const u8,   // positional args after subcommand23    sub: []const u8,            // subcommand (e.g. "list" in "service list")24    dry: bool,25    check: bool,26    no_apply: bool,27    all: bool,28    last: u32,29    json: bool,30};3132pub fn apply(ctx: Ctx) !void {33    if (ctx.dry) {34        output.applyDry(ctx.machine.name);35        const code = try exec.nixosRebuildDryActivate(ctx.io, &ctx.machine, ctx.gpa);36        if (code != 0) return error.BuildFailed;37        output.applyDryDone();38        return;39    }40    if (ctx.check) {41        return check(ctx);42    }4344    output.applyStart(ctx.machine.name);45    const start = std.Io.Clock.awake.now(ctx.io);4647    const code = exec.nixosRebuildSwitch(ctx.io, &ctx.machine, ctx.gpa) catch |e| {48        exec.markApplyFailed(ctx.io, ctx.environ);49        output.applyFailed("");50        return e;51    };5253    if (code != 0) {54        exec.markApplyFailed(ctx.io, ctx.environ);55        output.applyFailed("");56        return error.BuildFailed;57    }5859    const elapsed_ns = @max(0, start.untilNow(ctx.io, .awake).toNanoseconds());60    const elapsed: u64 = @intCast(@divFloor(elapsed_ns, 1_000_000));61    const gen = exec.getCurrentGeneration(ctx.gpa, ctx.io, &ctx.machine) catch 0;62    const after_failure = exec.takeApplyFailed(ctx.io, ctx.environ);63    output.applyDone(gen, elapsed, after_failure);64    logAction(ctx, "apply", gen);65}6667pub fn check(ctx: Ctx) !void {68    output.checkStart(ctx.machine.name);69    const code = try exec.nixosRebuildBuild(ctx.io, &ctx.machine, ctx.gpa);70    if (code != 0) {71        output.checkFailed("");72        return error.BuildFailed;73    }74    output.checkOk();75}7677pub fn back(ctx: Ctx) !void {78    const gens = try exec.getGenerations(ctx.gpa, ctx.io, &ctx.machine);79    defer ctx.gpa.free(gens);8081    var current: u32 = 0;82    for (gens) |g| if (g.current) { current = g.number; };8384    // Newest generation older than current. If there is none, we're already at the85    // oldest — stop cleanly instead of letting rollback fail with 'build failed'.86    var prev: u32 = 0;87    var has_prev = false;88    for (gens) |g| {89        if (g.number < current and (!has_prev or g.number > prev)) {90            prev = g.number;91            has_prev = true;92        }93    }94    if (!has_prev) {95        output.alreadyOldest();96        return;97    }9899    output.backStart(ctx.machine.name, current, prev);100    if (ctx.cfg.confirm and !output.confirm("")) return;101102    const code = try exec.rollback(ctx.io, &ctx.machine, ctx.gpa);103    if (code != 0) return error.BuildFailed;104    output.backDone(prev);105}106107pub fn go(ctx: Ctx) !void {108    if (ctx.args.len == 0) return error.Internal;109    const target = std.fmt.parseInt(u32, ctx.args[0], 10) catch return error.Internal;110    const current = try exec.getCurrentGeneration(ctx.gpa, ctx.io, &ctx.machine);111112    output.goStart(ctx.machine.name, current, target);113    if (ctx.cfg.confirm and !output.confirm("")) return;114115    const code = try exec.switchGeneration(ctx.io, &ctx.machine, ctx.gpa, target);116    if (code != 0) return error.ProcessFailed;117    output.generationDone(target);118}119120pub fn history(ctx: Ctx) !void {121    const gens = try exec.getGenerations(ctx.gpa, ctx.io, &ctx.machine);122    defer ctx.gpa.free(gens);123    output.historyHeader(ctx.machine.name);124    for (gens) |g| output.historyRow(g);125}126127pub fn genCmd(ctx: Ctx) !void {128    if (std.mem.eql(u8, ctx.sub, "list")) return history(ctx);129    if (std.mem.eql(u8, ctx.sub, "current")) {130        const n = try exec.getCurrentGeneration(ctx.gpa, ctx.io, &ctx.machine);131        output.genCurrent(n);132        return;133    }134    if (std.mem.eql(u8, ctx.sub, "delete")) {135        if (ctx.args.len == 0) return error.Internal;136        if (std.mem.eql(u8, ctx.args[0], "old")) {137            if (ctx.cfg.confirm and !output.confirm("")) return;138            _ = try exec.deleteOldGenerations(ctx.io, &ctx.machine, ctx.gpa);139        } else {140            const n = std.fmt.parseInt(u32, ctx.args[0], 10) catch return error.Internal;141            if (ctx.cfg.confirm and !output.confirm("")) return;142            _ = try exec.deleteGeneration(ctx.io, &ctx.machine, ctx.gpa, n);143        }144        output.done();145        return;146    }147    return error.Internal;148}149150pub fn clean(ctx: Ctx) !void {151    const gens = try exec.getGenerations(ctx.gpa, ctx.io, &ctx.machine);152    defer ctx.gpa.free(gens);153    const all = ctx.all or std.mem.eql(u8, ctx.sub, "all");154    const total: u32 = @intCast(gens.len);155    // `clean all` keeps only the current generation; otherwise keep the configured156    // count. With nothing older than the keep limit, there's nothing to collect.157    const keep: u32 = if (all) 1 else ctx.cfg.generations;158    if (total <= keep) {159        output.cleanNothing(ctx.machine.name, total);160        return;161    }162    output.cleanStart(ctx.machine.name, keep, total);163    if (ctx.cfg.confirm and !output.confirm("removing — cannot be undone")) return;164    _ = try exec.collectGarbage(ctx.io, &ctx.machine, ctx.gpa, all, ctx.cfg.generations);165    output.cleanDone("?");166}167168pub fn statusCmd(ctx: Ctx) !void {169    output.statusHeader();170    // --all renders every configured machine; remotes route through the same SSH171    // path as exec.capture. An unreachable machine is shown in red, not fatal.172    if (ctx.all and ctx.cfg.machines.len > 0) {173        for (ctx.cfg.machines) |m| statusRowFor(ctx, &m);174        return;175    }176    statusRowFor(ctx, &ctx.machine);177}178179fn statusRowFor(ctx: Ctx, machine: *const types.Machine) void {180    // A failure to read the current generation means we couldn't reach or query181    // the machine — mark it unreachable rather than reporting a bogus gen 0.182    const gen = exec.getCurrentGeneration(ctx.gpa, ctx.io, machine) catch {183        output.statusRow(machine.name, 0, "", "", false);184        return;185    };186    const st = exec.systemStatus(ctx.gpa, ctx.io, machine);187    defer ctx.gpa.free(st.size);188    defer ctx.gpa.free(st.age);189    output.statusRow(machine.name, gen, st.age, st.size, true);190}191192pub fn diff(ctx: Ctx) !void {193    const gens = try exec.getGenerations(ctx.gpa, ctx.io, &ctx.machine);194    defer ctx.gpa.free(gens);195    var current: u32 = 0;196    var prev: u32 = 0;197    for (gens) |g| {198        if (g.current) current = g.number;199        if (!g.current and g.number > prev and g.number < current) prev = g.number;200    }201    if (ctx.args.len >= 2) {202        const a = std.fmt.parseInt(u32, ctx.args[0], 10) catch current - 1;203        const b = std.fmt.parseInt(u32, ctx.args[1], 10) catch current;204        output.diffHeader(a, b, ctx.machine.name);205        if (try exec.diffClosures(ctx.io, &ctx.machine, ctx.gpa, a, b) != 0) return error.ProcessFailed;206    } else {207        output.diffHeader(if (prev > 0) prev else current - 1, current, ctx.machine.name);208        if (try exec.diffClosures(ctx.io, &ctx.machine, ctx.gpa, if (prev > 0) prev else current - 1, current) != 0) return error.ProcessFailed;209    }210}211212pub fn mood(ctx: Ctx) !void {213    const gen = exec.getCurrentGeneration(ctx.gpa, ctx.io, &ctx.machine) catch 0;214    const st = exec.systemStatus(ctx.gpa, ctx.io, &ctx.machine);215    defer ctx.gpa.free(st.size);216    defer ctx.gpa.free(st.age);217    const state = exec.systemRunningState(ctx.gpa, ctx.io, &ctx.machine) catch try ctx.gpa.dupe(u8, "unknown");218    defer ctx.gpa.free(state);219    output.mood(ctx.machine.name, state, gen, st.age, st.size);220}221222pub fn doctor(ctx: Ctx) !void {223    output.doctorHeader(ctx.machine.name);224    const checks = try exec.runDoctorChecks(ctx.gpa, ctx.io, &ctx.machine);225    defer ctx.gpa.free(checks);226    var warnings: u32 = 0;227    var failures: u32 = 0;228    for (checks) |ch| {229        output.doctorRow(ch);230        if (ch.status == .warn) warnings += 1;231        if (ch.status == .fail) failures += 1;232    }233    output.doctorSummary(warnings, failures);234}235236// nina update — kepr self-update for the nina binary itself.237pub fn update(ctx: Ctx) !void {238    output.updateSelfStart();239240    if (comptime std.mem.eql(u8, version.PLATFORM, "unsupported")) {241        output.updateSelfNoPlatform(@tagName(builtin.cpu.arch) ++ "-" ++ @tagName(builtin.os.tag));242        return error.Internal;243    }244245    const env_url = ctx.environ.get("NINA_UPDATE_SOURCE");246    const source_url = env_url orelse UPDATE_URL;247248    const body = exec.fetchUrl(ctx.gpa, ctx.io, source_url) catch |e| switch (e) {249        error.NetworkError, error.HttpError => {250            output.updateSelfNetworkError();251            return;252        },253        else => return e,254    };255    defer ctx.gpa.free(body);256257    const parsed = std.json.parseFromSlice(std.json.Value, ctx.gpa, body, .{}) catch {258        output.printWarning("could not parse release metadata");259        return;260    };261    defer parsed.deinit();262263    const root = parsed.value;264    if (root != .object) { output.printWarning("malformed release metadata"); return; }265266    const remote_ver = blk: {267        const v = root.object.get("version") orelse { output.printWarning("malformed release metadata"); return; };268        break :blk switch (v) { .string => |s| s, else => { output.printWarning("malformed release metadata"); return; } };269    };270271    if (std.mem.eql(u8, remote_ver, version.VERSION)) {272        output.updateSelfCurrent(version.VERSION);273        return;274    }275276    output.updateSelfAvailable(version.VERSION, remote_ver);277    if (ctx.check) return;278279    var exe_buf: [std.Io.Dir.max_path_bytes]u8 = undefined;280    const install_path = exec.selfExePath(ctx.io, &exe_buf) catch {281        errors.error_info.setMessage("could not determine install path", .{});282        return error.Internal;283    };284285    // When running from the nix store, defer to nix profile upgrade so nix286    // manages the transition (the store is read-only; binary replacement fails).287    // A NixOS system install also resolves into the store but isn't a profile288    // element, so check the profile to avoid a no-op `upgrade` — it updates with289    // the next nixos-rebuild instead.290    if (std.mem.startsWith(u8, install_path, "/nix/store/")) {291        const nina_element = exec.profileNinaElement(ctx.gpa, ctx.io, &ctx.machine);292        defer {293            if (nina_element) |n| ctx.gpa.free(n);294        }295        if (nina_element == null) {296            output.updateSelfNixSystemManaged();297            return;298        }299        const element = nina_element.?;300        output.updateSelfNixManaged(remote_ver);301        if (ctx.cfg.confirm and !output.confirm("")) return;302        const ec = exec.streamLocal(ctx.io, &.{ "nix", "profile", "upgrade", element }) catch {303            output.updateSelfNixFailed();304            return;305        };306        if (ec != 0) output.updateSelfNixFailed();307        return;308    }309310    const plat_info = blk: {311        const pv = root.object.get("platforms") orelse break :blk null;312        if (pv != .object) break :blk null;313        break :blk pv.object.get(version.PLATFORM);314    };315    if (plat_info == null) { output.updateSelfNoPlatform(version.PLATFORM); return; }316317    const dl_url = blk: {318        const v = plat_info.?.object.get("url") orelse { output.printWarning("malformed release metadata"); return; };319        break :blk switch (v) { .string => |s| s, else => { output.printWarning("malformed release metadata"); return; } };320    };321322    const raw_cksum = blk: {323        if (plat_info.?.object.get("blake3")) |v|324            break :blk switch (v) { .string => |s| s, else => { output.printWarning("malformed release metadata"); return; } };325        if (plat_info.?.object.get("checksum")) |v|326            break :blk switch (v) { .string => |s| s, else => { output.printWarning("malformed release metadata"); return; } };327        output.printWarning("missing checksum in release metadata");328        return;329    };330    const expected_hex = if (std.mem.startsWith(u8, raw_cksum, "blake3:")) raw_cksum["blake3:".len..] else raw_cksum;331332    if (ctx.cfg.confirm and !output.confirm("")) return;333334    output.updateSelfDownloading(remote_ver, version.PLATFORM);335    const tmp_path = exec.downloadToTemp(ctx.gpa, ctx.io, dl_url) catch {336        output.printWarning("download failed — check your connection and try again");337        return;338    };339    defer ctx.gpa.free(tmp_path);340341    output.updateSelfVerifying();342    exec.verifyAndInstall(ctx.gpa, ctx.io, tmp_path, expected_hex, install_path) catch |e| switch (e) {343        error.ChecksumMismatch => { output.updateSelfChecksumFailed(); return; },344        else => return e,345    };346347    output.updateSelfDone(version.VERSION, remote_ver);348}349350// nina goodbye — clean uninstall. Handles the three install methods, and the351// case where more than one is present at once (the installer can add nina to352// the nix profile AND wire ~/nina.nix into the system config).353pub fn goodbye(ctx: Ctx) !void {354    output.goodbyeStart();355356    var exe_buf: [std.Io.Dir.max_path_bytes]u8 = undefined;357    const install_path = exec.selfExePath(ctx.io, &exe_buf) catch {358        errors.error_info.setMessage("could not determine install path", .{});359        return error.Internal;360    };361362    // A binary outside the nix store is a plain install — just delete it.363    if (!std.mem.startsWith(u8, install_path, "/nix/store/")) {364        output.goodbyeFile(install_path);365        if (ctx.cfg.confirm and !output.confirm("")) return;366        std.Io.Dir.deleteFileAbsolute(ctx.io, install_path) catch |e| {367            errors.error_info.setMessage("could not remove {s}", .{install_path});368            return e;369        };370        output.goodbyeDone();371        return;372    }373374    // In the nix store: a `nix profile` install, a NixOS system package375    // (programs.nina.enable via ~/nina.nix), or both — they're independent and376    // both resolve into the store. Remove the profile element if present, and377    // separately flag the system module. We never auto-remove the system one:378    // editing /etc/nixos needs sudo, and deleting ~/nina.nix while it's still379    // imported breaks the next rebuild.380    const nina_element = exec.profileNinaElement(ctx.gpa, ctx.io, &ctx.machine);381    defer {382        if (nina_element) |n| ctx.gpa.free(n);383    }384    const system_managed = ninaNixExists(ctx);385386    if (nina_element) |element| {387        output.goodbyeNix();388        if (ctx.cfg.confirm and !output.confirm("")) return;389        const ec = exec.streamLocal(ctx.io, &.{ "nix", "profile", "remove", element }) catch {390            output.goodbyeFailed("nix profile remove failed");391            return;392        };393        if (ec != 0) {394            output.goodbyeFailed("nix profile remove failed");395            return;396        }397    }398399    // System module present, or nothing in the profile and not a plain binary400    // (so it must be system-managed) — instruct rather than touch /etc/nixos.401    if (system_managed or nina_element == null) {402        output.goodbyeNixSystemManaged();403    }404405    output.goodbyeDone();406}407408// Read-only check for the installer's ~/nina.nix system-config snippet.409fn ninaNixExists(ctx: Ctx) bool {410    const home = ctx.environ.get("HOME") orelse return false;411    const path = std.fmt.allocPrint(ctx.gpa, "{s}/nina.nix", .{home}) catch return false;412    defer ctx.gpa.free(path);413    const bytes = std.Io.Dir.readFileAlloc(.cwd(), ctx.io, path, ctx.gpa, .unlimited) catch return false;414    ctx.gpa.free(bytes);415    return true;416}417418fn channelUpdateCmd(ctx: Ctx) !void {419    output.updateStart(ctx.machine.name);420    _ = try exec.channelUpdate(ctx.io, &ctx.machine, ctx.gpa);421    output.updateDone();422}423424pub fn upgrade(ctx: Ctx) !void {425    output.upgradeStart(ctx.machine.name);426    output.printSubstep("updating channels", .{});427    _ = exec.channelUpdate(ctx.io, &ctx.machine, ctx.gpa) catch {};428    output.printSubstep("rebuilding", .{});429    const start = std.Io.Clock.awake.now(ctx.io);430    const code = try exec.nixosRebuildSwitch(ctx.io, &ctx.machine, ctx.gpa);431    if (code != 0) {432        output.applyFailed("");433        return error.BuildFailed;434    }435    const elapsed_ns = @max(0, start.untilNow(ctx.io, .awake).toNanoseconds());436    const elapsed: u64 = @intCast(@divFloor(elapsed_ns, 1_000_000));437    const gen = exec.getCurrentGeneration(ctx.gpa, ctx.io, &ctx.machine) catch 0;438    output.applyDone(gen, elapsed, false);439}440441pub fn log(ctx: Ctx) !void {442    output.logHeader(ctx.machine.name);443    const content = exec.readNinaLog(ctx.gpa, ctx.io, ctx.environ, ctx.last) catch {444        // No log yet — that's fine445        return;446    };447    defer ctx.gpa.free(content);448    var lines = std.mem.splitScalar(u8, content, '\n');449    while (lines.next()) |line| {450        const t = std.mem.trim(u8, line, " \t\r");451        if (t.len == 0) continue;452        if (t[0] == '{') {453            renderJsonLogLine(ctx.gpa, t);454        } else {455            // legacy tab-separated format456            var parts = std.mem.tokenizeScalar(u8, t, '\t');457            const date = parts.next() orelse continue;458            const time = parts.next() orelse "";459            const action = parts.next() orelse "";460            const detail = parts.next() orelse "";461            output.logRow(date, time, action, detail);462        }463    }464}465466// The on-disk log is JSON Lines: {"ts","machine","command","outcome","gen_after",...}.467// Render ts -> date/time columns, command -> action, outcome(+gen) -> detail.468fn renderJsonLogLine(gpa: std.mem.Allocator, line: []const u8) void {469    const parsed = std.json.parseFromSlice(std.json.Value, gpa, line, .{}) catch {470        output.logRow(line, "", "", ""); // unparseable — show raw rather than drop471        return;472    };473    defer parsed.deinit();474    if (parsed.value != .object) return;475    const o = parsed.value.object;476477    const ts = jsonStr(o, "ts");478    const date = if (ts.len >= 10) ts[0..10] else ts;479    const time = if (ts.len >= 16) ts[11..16] else "";480    const action = jsonStr(o, "command");481    const outcome = jsonStr(o, "outcome");482483    var buf: [160]u8 = undefined;484    var detail: []const u8 = outcome;485    if (o.get("gen_after")) |g| {486        if (g == .integer) {487            detail = std.fmt.bufPrint(&buf, "{s}   -> gen {d}", .{ outcome, g.integer }) catch outcome;488        }489    }490    output.logRow(date, time, action, detail);491}492493fn jsonStr(o: std.json.ObjectMap, key: []const u8) []const u8 {494    if (o.get(key)) |v| {495        if (v == .string) return v.string;496    }497    return "";498}499500pub fn edit(ctx: Ctx) !void {501    const hardware = ctx.args.len > 0 and std.mem.eql(u8, ctx.args[0], "hardware");502    const filename = if (hardware) "hardware-configuration.nix" else "configuration.nix";503    const path = try std.fmt.allocPrint(ctx.gpa, "{s}/{s}", .{ ctx.machine.config_path, filename });504    defer ctx.gpa.free(path);505    output.editOpen(path, ctx.cfg.editor);506    _ = try exec.openEditor(ctx.io, ctx.gpa, ctx.cfg.editor, path, null);507}508509pub fn fmt(ctx: Ctx) !void {510    const path = try std.fmt.allocPrint(ctx.gpa, "{s}/configuration.nix", .{ctx.machine.config_path});511    defer ctx.gpa.free(path);512    if (ctx.check) {513        const code = try exec.nixpkgsFmt(ctx.io, &ctx.machine, ctx.gpa, path, true);514        if (code != 0) output.fmtNeedsFormat() else output.fmtDone();515        return;516    }517    output.fmtStart(path);518    _ = try exec.nixpkgsFmt(ctx.io, &ctx.machine, ctx.gpa, path, false);519    output.fmtDone();520}521522pub fn repl(ctx: Ctx) !void {523    output.replStart();524    _ = try exec.nixRepl(ctx.io, &ctx.machine, ctx.gpa);525}526527pub fn develop(ctx: Ctx) !void {528    if (std.mem.eql(u8, ctx.sub, "show")) {529        _ = try exec.nixBuild(ctx.io, &ctx.machine, ctx.gpa, null);530        return;531    }532    const run_cmd: ?[]const u8 = if (ctx.args.len > 0 and std.mem.eql(u8, ctx.sub, "run"))533        ctx.args[0]534    else535        null;536    output.developStart(&.{});537    _ = try exec.nixDevelop(ctx.io, &ctx.machine, ctx.gpa, run_cmd);538    output.developDone();539}540541pub fn info(ctx: Ctx) !void {542    output.infoHeader(ctx.machine.name);543    const nixos_ver = exec.systemInfo(ctx.gpa, ctx.io, &ctx.machine) catch try ctx.gpa.dupe(u8, "unknown");544    defer ctx.gpa.free(nixos_ver);545    output.infoRow("nixos", std.mem.trim(u8, nixos_ver, " \t\n\r"));546547    const kernel = exec.kernelInfo(ctx.gpa, ctx.io, &ctx.machine) catch try ctx.gpa.dupe(u8, "unknown");548    defer ctx.gpa.free(kernel);549    output.infoRow("kernel", std.mem.trim(u8, kernel, " \t\n\r"));550551    const uptime = exec.uptimeInfo(ctx.gpa, ctx.io, &ctx.machine) catch try ctx.gpa.dupe(u8, "unknown");552    defer ctx.gpa.free(uptime);553    output.infoRow("uptime", std.mem.trim(u8, uptime, " \t\n\r"));554}555556pub fn boot(ctx: Ctx) !void {557    output.bootHeader(ctx.machine.name);558    const entries = exec.bootEntries(ctx.gpa, ctx.io, &ctx.machine) catch &.{};559    defer ctx.gpa.free(entries);560    for (entries, 0..) |entry, i| output.bootEntry(entry, i);561}562563pub fn searchCmd(ctx: Ctx) !void {564    const query = if (ctx.args.len > 0) ctx.args[0] else "";565    api.ensureRegistryPinned(ctx.gpa, ctx.io, ctx.environ);566    const selected = try search_tui.run(ctx.gpa, ctx.io, query, .packages);567    if (selected) |npkg| try selectAndInstall(ctx, npkg);568}569570pub fn optionCmd(ctx: Ctx) !void {571    const query = if (ctx.args.len > 0) ctx.args[0] else "";572    api.ensureRegistryPinned(ctx.gpa, ctx.io, ctx.environ);573    _ = try search_tui.run(ctx.gpa, ctx.io, query, .options);574}575576pub fn install(ctx: Ctx) !void {577    const pkg_name = if (ctx.args.len > 0) ctx.args[0] else return error.PackageNotFound;578579    api.ensureRegistryPinned(ctx.gpa, ctx.io, ctx.environ);580581    // Search for the package to get the attr582    const pkgs = api.searchPackages(ctx.gpa, ctx.io, pkg_name) catch {583        errors.error_info.setMessage("'{s}' not found in nixpkgs", .{pkg_name});584        errors.error_info.setSuggestion("nina search {s}", .{pkg_name});585        return error.PackageNotFound;586    };587588    if (pkgs.len == 0) {589        // No matches — likely a typo. Suggest the closest real package and offer it.590        if (closestPackage(ctx, pkg_name)) |sugg| {591            output.didYouMean(pkg_name, sugg.pname);592            if (output.confirm("")) try selectAndInstall(ctx, sugg);593            return;594        }595        errors.error_info.setMessage("'{s}' not found in nixpkgs", .{pkg_name});596        errors.error_info.setSuggestion("nina search {s}", .{pkg_name});597        return error.PackageNotFound;598    }599600    // Prefer an exact name match over the first search result — `install ripgrep`601    // must pick "ripgrep", not the alphabetically-first match like "repgrep".602    var found = pkgs[0];603    for (pkgs) |p| {604        if (std.mem.eql(u8, p.pname, pkg_name)) {605            found = p;606            break;607        }608    }609    try selectAndInstall(ctx, found);610}611612// Find the real package whose name is closest to a not-found query (typo help).613// Typos usually keep the leading characters, so gather candidates with a prefix614// search and rank by edit distance; return the best only if it's typo-close.615fn closestPackage(ctx: Ctx, query: []const u8) ?types.NixPackage {616    if (query.len < 2) return null;617    var candidates = api.searchPackages(ctx.gpa, ctx.io, query[0..@min(query.len, 4)]) catch &.{};618    if (candidates.len == 0 and query.len > 2) {619        candidates = api.searchPackages(ctx.gpa, ctx.io, query[0..2]) catch &.{};620    }621    if (candidates.len == 0) return null;622623    var best: ?types.NixPackage = null;624    var best_dist: usize = std.math.maxInt(usize);625    for (candidates) |p| {626        const d = editDistance(query, p.pname);627        if (d > 0 and d < best_dist) {628            best_dist = d;629            best = p;630        }631    }632    // Only suggest a genuinely close name, scaled to query length.633    const threshold = @max(@as(usize, 2), query.len / 3);634    return if (best_dist <= threshold) best else null;635}636637// Case-insensitive Levenshtein distance. Names longer than the row buffer are638// treated as far away (never suggested).639fn editDistance(a: []const u8, b: []const u8) usize {640    const n = b.len;641    if (a.len == 0) return n;642    if (n == 0) return a.len;643    if (n + 1 > 128) return std.math.maxInt(usize);644    var prev: [128]usize = undefined;645    var curr: [128]usize = undefined;646    var j: usize = 0;647    while (j <= n) : (j += 1) prev[j] = j;648    var i: usize = 1;649    while (i <= a.len) : (i += 1) {650        curr[0] = i;651        j = 1;652        while (j <= n) : (j += 1) {653            const cost: usize = if (std.ascii.toLower(a[i - 1]) == std.ascii.toLower(b[j - 1])) 0 else 1;654            curr[j] = @min(prev[j] + 1, @min(curr[j - 1] + 1, prev[j - 1] + cost));655        }656        @memcpy(prev[0 .. n + 1], curr[0 .. n + 1]);657    }658    return prev[n];659}660661test "editDistance is case-insensitive Levenshtein" {662    try std.testing.expectEqual(@as(usize, 1), editDistance("firefux", "firefox"));663    try std.testing.expectEqual(@as(usize, 0), editDistance("git", "GIT"));664    try std.testing.expectEqual(@as(usize, 2), editDistance("fierfox", "firefox"));665    try std.testing.expectEqual(@as(usize, 7), editDistance("", "firefox"));666}667668// Prompt for the install method (profile / system / try) and dispatch. Shared by669// `nina install <pkg>` and the search widget's Enter-to-select — the letter keys670// are read here, after the search widget's raw mode is gone, so they don't671// collide with typing a query.672fn selectAndInstall(ctx: Ctx, npkg: types.NixPackage) !void {673    output.installSelectPrompt(npkg.pname, npkg.version);674675    var choice_buf: [8]u8 = undefined;676    var choice_len: usize = 0;677    while (choice_len < choice_buf.len) {678        const n = std.posix.read(std.posix.STDIN_FILENO, choice_buf[choice_len .. choice_len + 1]) catch break;679        if (n == 0) break;680        if (choice_buf[choice_len] == '\n') break;681        choice_len += 1;682    }683    const choice = std.mem.trim(u8, choice_buf[0..choice_len], " \t");684685    if (choice.len == 0 or choice[0] == 'i' or choice[0] == 'I') {686        try profileInstallPkg(ctx, npkg);687    } else if (choice[0] == 's' or choice[0] == 'S') {688        try systemInstallPkg(ctx, npkg);689    } else if (choice[0] == 't' or choice[0] == 'T') {690        try tryPkg(ctx, npkg);691    }692}693694fn profileInstallPkg(ctx: Ctx, npkg: types.NixPackage) !void {695    output.installStart(npkg.pname, .profile);696    output.printSubstep("nix profile add nixpkgs#{s}", .{npkg.attr});697    output.printTeach(try std.fmt.allocPrint(ctx.gpa, "nix profile add nixpkgs#{s}", .{npkg.attr}));698    const code = try exec.profileInstall(ctx.io, &ctx.machine, ctx.gpa, npkg.attr);699    if (code != 0) return error.ProcessFailed;700    output.installDone(npkg.pname);701}702703fn systemInstallPkg(ctx: Ctx, npkg: types.NixPackage) !void {704    const config_path = try std.fmt.allocPrint(ctx.gpa, "{s}/configuration.nix", .{ctx.machine.config_path});705    defer ctx.gpa.free(config_path);706    const line = api.findSystemPackagesLine(ctx.io, config_path) orelse 1;707    output.installEditorPrompt(npkg.pname, config_path, line, ctx.cfg.editor);708    _ = try exec.openEditor(ctx.io, ctx.gpa, ctx.cfg.editor, config_path, line);709    if (ctx.cfg.confirm) {710        if (output.confirm("apply now? ")) {711            try apply(ctx);712        }713    }714}715716fn tryPkg(ctx: Ctx, npkg: types.NixPackage) !void {717    output.tryStart(npkg.pname);718    output.printSubstep("nix shell nixpkgs#{s}", .{npkg.attr});719    _ = try exec.nixShell(ctx.io, &ctx.machine, ctx.gpa, npkg.attr);720    output.tryDone();721}722723pub fn remove(ctx: Ctx) !void {724    const pkg_name = if (ctx.args.len > 0) ctx.args[0] else return error.PackageNotFound;725    output.removeStart(pkg_name);726    const code = try exec.profileRemove(ctx.io, &ctx.machine, ctx.gpa, pkg_name);727    if (code != 0) return error.ProcessFailed;728    output.done();729}730731pub fn list(ctx: Ctx) !void {732    output.listHeader(ctx.machine.name);733734    // Profile packages: parse `nix profile list --json` into clean name+version735    // rows instead of dumping nix's verbose multi-line "Name:/Flake attribute:"736    // blocks.737    if (exec.profileListJson(ctx.gpa, ctx.io, &ctx.machine) catch null) |json| {738        defer ctx.gpa.free(json);739        output.listSection("profile");740        renderProfileJson(ctx.gpa, json);741    }742743    // System packages: the references of /run/current-system/sw, each a744    // <hash>-<name>-<version> store path.745    if (exec.systemPackagePaths(ctx.gpa, ctx.io, &ctx.machine) catch null) |paths| {746        defer ctx.gpa.free(paths);747        output.blankLine();748        output.listSection("system");749        var lines = std.mem.splitScalar(u8, paths, '\n');750        while (lines.next()) |line| {751            const t = std.mem.trim(u8, line, " \t\r");752            if (t.len == 0) continue;753            const row = pkgFromStorePath(t);754            // Skip support paths with no parseable version (man pages, wrappers).755            if (row.version.len == 0) continue;756            output.listPkg(row.name, row.version);757        }758    }759}760761const PkgRow = struct { name: []const u8, version: []const u8 };762763// Split a nix store path basename (<hash>-<name>-<version>) into name + version.764// Version begins at the first '-' followed by a digit, which reliably lands on765// the name/version boundary since the 32-char hash and package names start with766// non-digits.767fn pkgFromStorePath(path: []const u8) PkgRow {768    const base = std.fs.path.basename(path);769    const after_hash = if (base.len > 33 and base[32] == '-') base[33..] else base;770    var i: usize = 0;771    while (i + 1 < after_hash.len) : (i += 1) {772        if (after_hash[i] == '-' and std.ascii.isDigit(after_hash[i + 1])) {773            return .{ .name = after_hash[0..i], .version = stripOutputSuffix(after_hash[i + 1 ..]) };774        }775    }776    return .{ .name = after_hash, .version = "" };777}778779// Multi-output derivations append the output name to the store path (e.g.780// curl-8.20.0-bin, less-692-man). Strip that suffix so the version column reads781// as just the version.782fn stripOutputSuffix(ver: []const u8) []const u8 {783    const suffixes = [_][]const u8{ "-bin", "-man", "-dev", "-doc", "-lib", "-info", "-out", "-static", "-devdoc" };784    for (suffixes) |s| {785        if (std.mem.endsWith(u8, ver, s)) return ver[0 .. ver.len - s.len];786    }787    return ver;788}789790test "pkgFromStorePath splits name and version at first dash-digit" {791    const a = pkgFromStorePath("/nix/store/abcdefghijklmnopqrstuvwxyz012345-ripgrep-15.1.0");792    try std.testing.expectEqualStrings("ripgrep", a.name);793    try std.testing.expectEqualStrings("15.1.0", a.version);794795    const b = pkgFromStorePath("/nix/store/abcdefghijklmnopqrstuvwxyz012345-helix-25.01");796    try std.testing.expectEqualStrings("helix", b.name);797    try std.testing.expectEqualStrings("25.01", b.version);798799    // multi-output store paths drop their output-name suffix800    const c = pkgFromStorePath("/nix/store/abcdefghijklmnopqrstuvwxyz012345-curl-8.20.0-bin");801    try std.testing.expectEqualStrings("curl", c.name);802    try std.testing.expectEqualStrings("8.20.0", c.version);803}804805fn firstStorePath(el: std.json.Value) ?[]const u8 {806    if (el != .object) return null;807    const sp = el.object.get("storePaths") orelse return null;808    if (sp != .array or sp.array.items.len == 0) return null;809    const first = sp.array.items[0];810    return if (first == .string) first.string else null;811}812813// `nix profile list --json` has two shapes across nix versions: newer keys each814// element by name (object), older lists them positionally (array). Handle both.815fn renderProfileJson(gpa: std.mem.Allocator, json: []const u8) void {816    const parsed = std.json.parseFromSlice(std.json.Value, gpa, json, .{}) catch return;817    defer parsed.deinit();818    if (parsed.value != .object) return;819    const elements = parsed.value.object.get("elements") orelse return;820    switch (elements) {821        .object => |obj| {822            var it = obj.iterator();823            while (it.next()) |entry| {824                const ver = if (firstStorePath(entry.value_ptr.*)) |p| pkgFromStorePath(p).version else "";825                output.listPkg(entry.key_ptr.*, ver);826            }827        },828        .array => |arr| {829            for (arr.items) |el| {830                const path = firstStorePath(el) orelse continue;831                const row = pkgFromStorePath(path);832                output.listPkg(row.name, row.version);833            }834        },835        else => {},836    }837}838839pub fn tryCmd(ctx: Ctx) !void {840    const pkg_name_arg = if (ctx.args.len > 0) ctx.args[0] else return error.PackageNotFound;841    const shell_pkg = types.NixPackage{ .attr = pkg_name_arg, .pname = pkg_name_arg, .version = "", .description = "" };842    try tryPkg(ctx, shell_pkg);843}844845// --- Service commands ---846847pub fn service(ctx: Ctx) !void {848    if (std.mem.eql(u8, ctx.sub, "list") or ctx.sub.len == 0) {849        output.serviceListHeader(ctx.machine.name);850        const svcs = exec.serviceList(ctx.gpa, ctx.io, &ctx.machine) catch &.{};851        defer ctx.gpa.free(svcs);852        for (svcs) |s| output.serviceRow(s);853        return;854    }855    if (std.mem.eql(u8, ctx.sub, "logs")) {856        const name = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;857        const follow = ctx.args.len > 1 and std.mem.eql(u8, ctx.args[1], "-f");858        output.serviceLogsHeader(name, ctx.last, ctx.machine.name);859        _ = try exec.serviceLogs(ctx.io, &ctx.machine, ctx.gpa, name, ctx.last, follow);860        return;861    }862    if (std.mem.eql(u8, ctx.sub, "status")) {863        const name = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;864        output.serviceVerb("status", name, ctx.machine.name);865        _ = try exec.serviceCtl(ctx.io, &ctx.machine, ctx.gpa, "status", name);866        return;867    }868    // start/stop/restart/enable/disable869    const name = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;870    if (ctx.cfg.confirm and (std.mem.eql(u8, ctx.sub, "stop") or std.mem.eql(u8, ctx.sub, "disable"))) {871        if (!output.confirm("")) return;872    }873    output.serviceVerb(ctx.sub, name, ctx.machine.name);874    _ = try exec.serviceCtl(ctx.io, &ctx.machine, ctx.gpa, ctx.sub, name);875    output.serviceDone();876}877878// --- Flake commands ---879880pub fn flake(ctx: Ctx) !void {881    if (std.mem.eql(u8, ctx.sub, "update")) {882        output.flakeUpdateStart();883        const input: ?[]const u8 = if (ctx.args.len > 0) ctx.args[0] else null;884        _ = try exec.flakeUpdate(ctx.io, &ctx.machine, ctx.gpa, input);885        output.flakeLockWritten();886        return;887    }888    if (std.mem.eql(u8, ctx.sub, "check")) {889        output.flakeCheckStart();890        const code = try exec.flakeCheck(ctx.io, &ctx.machine, ctx.gpa);891        if (code == 0) output.flakeValid() else output.checkFailed("");892        return;893    }894    if (std.mem.eql(u8, ctx.sub, "show")) {895        const json_out = exec.flakeShow(ctx.gpa, ctx.io, &ctx.machine) catch null;896        if (json_out) |j| {897            defer ctx.gpa.free(j);898            output.flakeShowHeader("flake outputs");899            // Parse and display the flake outputs900            const parsed = std.json.parseFromSlice(std.json.Value, ctx.gpa, j, .{}) catch return;901            defer parsed.deinit();902            if (parsed.value == .object) {903                var it = parsed.value.object.iterator();904                while (it.next()) |entry| {905                    if (entry.value_ptr.* == .object) {906                        var inner = entry.value_ptr.object.iterator();907                        while (inner.next()) |e2| {908                            const desc = if (e2.value_ptr.* == .object)909                                if (e2.value_ptr.object.get("description")) |d|910                                    if (d == .string) d.string else ""911                                else ""912                            else "";913                            output.flakeShowEntry(entry.key_ptr.*, e2.key_ptr.*, desc);914                        }915                    }916                }917            }918        }919        return;920    }921    if (std.mem.eql(u8, ctx.sub, "init")) {922        _ = try exec.flakeInit(ctx.io, &ctx.machine, ctx.gpa);923        return;924    }925    if (std.mem.eql(u8, ctx.sub, "lock")) {926        _ = try exec.flakeLock(ctx.io, &ctx.machine, ctx.gpa);927        return;928    }929    if (std.mem.eql(u8, ctx.sub, "clone")) {930        const url = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;931        _ = try exec.flakeClone(ctx.io, &ctx.machine, ctx.gpa, url);932        return;933    }934}935936// --- Store commands ---937938pub fn store(ctx: Ctx) !void {939    if (std.mem.eql(u8, ctx.sub, "gc")) {940        _ = try exec.storeGc(ctx.io, &ctx.machine, ctx.gpa);941        return;942    }943    if (std.mem.eql(u8, ctx.sub, "verify")) {944        output.storeVerifyStart();945        _ = try exec.storeVerify(ctx.io, &ctx.machine, ctx.gpa);946        return;947    }948    if (std.mem.eql(u8, ctx.sub, "repair")) {949        if (ctx.cfg.confirm and !output.confirm("")) return;950        output.storeRepairStart();951        _ = try exec.storeRepair(ctx.io, &ctx.machine, ctx.gpa);952        return;953    }954    if (std.mem.eql(u8, ctx.sub, "info")) {955        const si = try exec.storeInfo(ctx.gpa, ctx.io, &ctx.machine);956        output.storeInfo(si);957        return;958    }959    if (std.mem.eql(u8, ctx.sub, "path")) {960        const attr = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;961        const path = try exec.storePath(ctx.gpa, ctx.io, &ctx.machine, attr);962        defer ctx.gpa.free(path);963        output.storePath(path);964        return;965    }966    // default: info967    const si = try exec.storeInfo(ctx.gpa, ctx.io, &ctx.machine);968    output.storeInfo(si);969}970971// --- Channel commands ---972973pub fn channel(ctx: Ctx) !void {974    if (std.mem.eql(u8, ctx.sub, "list") or ctx.sub.len == 0) {975        output.channelListHeader(ctx.machine.name);976        const chans = try exec.channelList(ctx.gpa, ctx.io, &ctx.machine);977        defer ctx.gpa.free(chans);978        for (chans) |ch| output.channelRow(ch);979        return;980    }981    if (std.mem.eql(u8, ctx.sub, "add")) {982        const url = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;983        const name = if (ctx.args.len > 1) ctx.args[1] else "";984        _ = try exec.channelAdd(ctx.io, &ctx.machine, ctx.gpa, url, name);985        output.channelDone();986        return;987    }988    if (std.mem.eql(u8, ctx.sub, "remove")) {989        const name = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;990        _ = try exec.channelRemove(ctx.io, &ctx.machine, ctx.gpa, name);991        output.channelDone();992        return;993    }994    if (std.mem.eql(u8, ctx.sub, "update")) {995        return channelUpdateCmd(ctx);996    }997}998999// --- Profile commands ---10001001pub fn profile(ctx: Ctx) !void {1002    if (std.mem.eql(u8, ctx.sub, "list") or ctx.sub.len == 0) {1003        output.profileListHeader();1004        const out = exec.profileList(ctx.gpa, ctx.io, &ctx.machine) catch null;1005        if (out) |o| {1006            defer ctx.gpa.free(o);1007            var lines = std.mem.splitScalar(u8, o, '\n');1008            while (lines.next()) |line| {1009                const t = std.mem.trim(u8, line, " \t\r");1010                if (t.len == 0) continue;1011                output.profileRow(t, "", "");1012            }1013        }1014        return;1015    }1016    if (std.mem.eql(u8, ctx.sub, "install")) {1017        const attr = if (ctx.args.len > 0) ctx.args[0] else return error.PackageNotFound;1018        _ = try exec.profileInstall(ctx.io, &ctx.machine, ctx.gpa, attr);1019        output.done();1020        return;1021    }1022    if (std.mem.eql(u8, ctx.sub, "remove")) {1023        const attr = if (ctx.args.len > 0) ctx.args[0] else return error.PackageNotFound;1024        _ = try exec.profileRemove(ctx.io, &ctx.machine, ctx.gpa, attr);1025        output.done();1026        return;1027    }1028    if (std.mem.eql(u8, ctx.sub, "upgrade")) {1029        _ = try exec.profileUpgrade(ctx.io, &ctx.machine, ctx.gpa);1030        output.done();1031        return;1032    }1033}10341035// --- Pkg commands ---10361037pub fn pkg(ctx: Ctx) !void {1038    const name = if (ctx.args.len > 0) ctx.args[0] else return error.PackageNotFound;1039    if (std.mem.eql(u8, ctx.sub, "why")) {1040        _ = try exec.pkgWhy(ctx.io, &ctx.machine, ctx.gpa, name);1041        return;1042    }1043    if (std.mem.eql(u8, ctx.sub, "deps")) {1044        _ = try exec.pkgDeps(ctx.io, &ctx.machine, ctx.gpa, name);1045        return;1046    }1047    if (std.mem.eql(u8, ctx.sub, "size")) {1048        const s = exec.pkgSize(ctx.gpa, ctx.io, &ctx.machine, name) catch null;1049        if (s) |sz| {1050            defer ctx.gpa.free(sz);1051            output.pkgResult("size", sz);1052        }1053        return;1054    }1055    if (std.mem.eql(u8, ctx.sub, "path")) {1056        const p = try exec.storePath(ctx.gpa, ctx.io, &ctx.machine, name);1057        defer ctx.gpa.free(p);1058        output.pkgResult("path", p);1059        return;1060    }1061    if (std.mem.eql(u8, ctx.sub, "closure")) {1062        _ = try exec.pkgClosure(ctx.io, &ctx.machine, ctx.gpa, name);1063        return;1064    }1065}10661067// --- Pin / Unpin ---10681069pub fn pin(ctx: Ctx) !void {1070    const input = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;1071    const commit = if (ctx.args.len > 1) ctx.args[1] else return error.Internal;1072    exec.editFlakeLock(ctx.gpa, input, commit) catch return error.ProcessFailed;1073    output.pinDone(input, commit);1074}10751076pub fn unpin(ctx: Ctx) !void {1077    const input = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;1078    _ = try exec.flakeUpdate(ctx.io, &ctx.machine, ctx.gpa, input);1079    output.unpinDone(input);1080}10811082// --- Hash / Fetch ---10831084pub fn hash(ctx: Ctx) !void {1085    const path = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;1086    const h = try exec.nixHash(ctx.gpa, ctx.io, &ctx.machine, path);1087    defer ctx.gpa.free(h);1088    output.hashResult(std.mem.trim(u8, h, " \t\n\r"));1089}10901091pub fn fetch(ctx: Ctx) !void {1092    const url = if (ctx.args.len > 0) ctx.args[0] else return error.Internal;1093    const h = try exec.nixFetch(ctx.gpa, ctx.io, &ctx.machine, url);1094    defer ctx.gpa.free(h);1095    output.fetchResult(std.mem.trim(u8, h, " \t\n\r"), url);1096}10971098// --- Build / Run ---10991100pub fn build(ctx: Ctx) !void {1101    const attr: ?[]const u8 = if (ctx.args.len > 0) ctx.args[0] else null;1102    output.buildStart(attr orelse "default");1103    const code = try exec.nixBuild(ctx.io, &ctx.machine, ctx.gpa, attr);1104    if (code != 0) return error.BuildFailed;1105    output.buildDone();1106}11071108pub fn runCmd(ctx: Ctx) !void {1109    const pkg_arg = if (ctx.args.len > 0) ctx.args[0] else return error.PackageNotFound;1110    output.runStart(pkg_arg);1111    _ = try exec.nixRun(ctx.io, &ctx.machine, ctx.gpa, pkg_arg);1112}11131114// --- Hello ---11151116pub fn hello(ctx: Ctx) !void {1117    output.hello(ctx.cfg.machines);1118}11191120pub fn setup(gpa: std.mem.Allocator, io: std.Io, environ: *const std.process.Environ.Map) !void {1121    output.setupCheck();1122    const status = exec.checkNixFeatures(gpa, io, environ);1123    output.setupFeatures(status.nix_command, status.flakes);11241125    if (status.allEnabled()) {1126        output.setupAllSet();1127        api.ensureRegistryPinned(gpa, io, environ);1128        return;1129    }11301131    // On NixOS the features belong in configuration.nix (the declarative,1132    // permanent home), not ~/.config/nix/nix.conf. Offer to add the one line;1133    // the user runs the rebuild. We don't pin the registry here because the1134    // features aren't live until that rebuild lands.1135    if (exec.isNixOS(io)) {1136        const conf_path = "/etc/nixos/configuration.nix";1137        if (exec.nixosConfigEnablesFeatures(gpa, io, conf_path)) {1138            output.setupNixosNeedsRebuild(conf_path);1139            return;1140        }1141        output.setupNixosOffer(exec.NIXOS_FEATURES_LINE, conf_path);1142        if (output.confirmDefaultNo("add it now?")) {1143            if (exec.appendFeaturesToNixosConfig(gpa, io, environ, conf_path)) |_| {1144                output.setupNixosWrote(conf_path);1145            } else |_| {1146                output.setupNixosManual(exec.NIXOS_FEATURES_LINE, conf_path);1147            }1148        } else {1149            output.setupNixosManual(exec.NIXOS_FEATURES_LINE, conf_path);1150        }1151        return;1152    }11531154    // Non-NixOS: a user-level nix.conf takes effect immediately, no sudo needed.1155    output.setupEnabling();1156    const path = try exec.enableNixFeatures(gpa, io, environ);1157    defer gpa.free(path);11581159    output.setupDone(path);1160    api.ensureRegistryPinned(gpa, io, environ);1161}11621163// --- Log helper ---11641165fn logAction(ctx: Ctx, action: []const u8, gen: u32) void {1166    var ts_buf: [32]u8 = undefined;1167    const ts = nowIso(ctx.io, &ts_buf);1168    var buf: [256]u8 = undefined;1169    const entry = std.fmt.bufPrint(&buf, "{{\"ts\":\"{s}\",\"machine\":\"{s}\",\"command\":\"{s}\",\"outcome\":\"success\",\"gen_before\":null,\"gen_after\":{d},\"duration_ms\":0}}\n", .{1170        ts, ctx.machine.name, action, gen,1171    }) catch return;1172    exec.appendNinaLog(ctx.io, ctx.environ, entry);1173}11741175// Wall-clock UTC as ISO-8601. Uses Io.Clock.real (the settable Unix-epoch clock);1176// Io.Clock.awake is monotonic and unsuitable for timestamps. Falls back to epoch 0.1177fn nowIso(io: std.Io, buf: []u8) []const u8 {1178    const fallback = "1970-01-01T00:00:00Z";1179    const ns = std.Io.Clock.real.now(io).toNanoseconds();1180    if (ns <= 0) return fallback;1181    const secs: u64 = @intCast(@divFloor(ns, 1_000_000_000));1182    const es = std.time.epoch.EpochSeconds{ .secs = secs };1183    const ed = es.getEpochDay();1184    const yd = ed.calculateYearDay();1185    const md = yd.calculateMonthDay();1186    const ds = es.getDaySeconds();1187    return std.fmt.bufPrint(buf, "{d:0>4}-{d:0>2}-{d:0>2}T{d:0>2}:{d:0>2}:{d:0>2}Z", .{1188        yd.year, md.month.numeric(), @as(u32, md.day_index) + 1,1189        ds.getHoursIntoDay(), ds.getMinutesIntoHour(), ds.getSecondsIntoMinute(),1190    }) catch return fallback;1191}