main.zig

1// main.zig — entry point, arg parsing, dispatch, error handler2// THE ONLY FILE that creates the Io.Writer and passes it to output.init().3const std = @import("std");4const Io = std.Io;56const types = @import("types.zig");7const errors = @import("errors.zig");8const config = @import("config.zig");9const commands = @import("commands.zig");10const output = @import("output.zig");1112const Args = struct {13    command: []const u8 = "",14    sub: []const u8 = "",15    rest: []const []const u8 = &.{},16    machine: ?[]const u8 = null,17    version: bool = false,18    dry: bool = false,19    check: bool = false,20    no_apply: bool = false,21    all: bool = false,22    json: bool = false,23    last: u32 = 50,24    user: bool = false,25};2627pub fn main(startup: std.process.Init) !void {28    const arena = startup.arena.allocator();29    const gpa = startup.gpa;30    const io = startup.io;3132    // Command allocations go through an arena freed when main returns. nina is a33    // one-shot CLI that exits after one command, and std.process.exit skips34    // defers, so per-allocation frees were easy to miss — the arena guarantees35    // everything is released in one shot, eliminating exit-time leak reports.36    var cmd_arena = std.heap.ArenaAllocator.init(gpa);37    defer cmd_arena.deinit();38    const ca = cmd_arena.allocator();3940    // Initialize output module with buffered stdout writer. Streaming (not the41    // default positional) mode: stdout may be a terminal, pipe, or a redirected42    // regular file. Positional mode pwrites from offset 0 and ignores the fd's43    // inherited offset, which corrupts `{ echo h; nina x; } > f` and `>>` append44    // by overwriting from the start. Streaming honors the current file offset.45    var stdout_buf: [16384]u8 = undefined;46    var stdout_fw: Io.File.Writer = .initStreaming(.stdout(), io, &stdout_buf);47    output.init(&stdout_fw.interface, io, startup.environ_map, true);48    defer output.flush();4950    const argv = try startup.minimal.args.toSlice(arena);51    const args = try parseArgs(arena, argv);5253    if (args.version) {54        output.version();55        return;56    }5758    // Help and hello work without config59    if (args.command.len == 0 or std.mem.eql(u8, args.command, "help")) {60        output.help();61        return;62    }6364    // setup and update run before config so they work without ~/.nina.conf65    if (std.mem.eql(u8, args.command, "setup") or std.mem.eql(u8, args.command, "update")) {66        const dummy_machine: types.Machine = .{ .name = "local", .local = true };67        const dummy_cfg: types.NinaConfig = .{};68        const pre_ctx = commands.Ctx{69            .gpa = ca,70            .io = io,71            .environ = startup.environ_map,72            .machine = dummy_machine,73            .cfg = dummy_cfg,74            .args = args.rest,75            .sub = args.sub,76            .dry = args.dry,77            .check = args.check,78            .no_apply = args.no_apply,79            .all = args.all,80            .last = args.last,81            .json = args.json,82            .user = args.user,83        };84        if (std.mem.eql(u8, args.command, "setup")) {85            commands.setup(ca, io, startup.environ_map) catch |err| {86                const msg = errors.error_info.getMessage() orelse errors.staticMessage(err);87                const detail = errors.error_info.getDetail();88                const suggestion = errors.error_info.getSuggestion();89                output.printError(msg, detail, suggestion);90                output.flush();91                std.process.exit(1);92            };93        } else {94            dispatch(pre_ctx, args.command) catch |err| {95                reportError(err, ca);96                output.flush();97                std.process.exit(1);98            };99        }100        return;101    }102103    // Load config and resolve machine. On first run with no config file, offer104    // the setup wizard when stdout is a TTY; skip silently in piped/scripted mode.105    const cfg = cfg_blk: {106        if (config.load(arena, io, startup.environ_map)) |c| {107            break :cfg_blk c;108        } else |err| {109            if (err == error.ConfigNotFound and (std.Io.File.stdout().isTty(io) catch false)) {110                commands.firstRunWizard(ca, io, startup.environ_map) catch |wizard_err| {111                    const msg = errors.error_info.getMessage() orelse errors.staticMessage(wizard_err);112                    const detail = errors.error_info.getDetail();113                    const suggestion = errors.error_info.getSuggestion();114                    output.printError(msg, detail, suggestion);115                    output.flush();116                    std.process.exit(1);117                };118                errors.error_info.reset();119                break :cfg_blk config.load(arena, io, startup.environ_map) catch |err2| {120                    const msg = errors.error_info.getMessage() orelse errors.staticMessage(err2);121                    const detail = errors.error_info.getDetail();122                    const suggestion = errors.error_info.getSuggestion();123                    output.printError(msg, detail, suggestion);124                    output.flush();125                    std.process.exit(1);126                };127            }128            const msg = errors.error_info.getMessage() orelse errors.staticMessage(err);129            const detail = errors.error_info.getDetail();130            const suggestion = errors.error_info.getSuggestion();131            output.printError(msg, detail, suggestion);132            output.flush();133            std.process.exit(1);134        }135    };136137    output.setTeach(cfg.teach);138139    const machine = config.resolveMachine(&cfg, args.machine) catch |err| {140        const msg = errors.error_info.getMessage() orelse errors.staticMessage(err);141        const detail = errors.error_info.getDetail();142        const suggestion = errors.error_info.getSuggestion();143        output.printError(msg, detail, suggestion);144        output.flush();145        std.process.exit(1);146    };147148    const ctx = commands.Ctx{149        .gpa = ca,150        .io = io,151        .environ = startup.environ_map,152        .machine = machine,153        .cfg = cfg,154        .args = args.rest,155        .sub = args.sub,156        .dry = args.dry,157        .check = args.check,158        .no_apply = args.no_apply,159        .all = args.all,160        .last = args.last,161        .json = args.json,162        .user = args.user,163    };164165    dispatch(ctx, args.command) catch |err| {166        reportError(err, ca);167        output.flush();168        std.process.exit(1);169    };170}171172// Network/ssh/search failures are the machine's fault, not the user's — surface173// them with the sad kaomoji. BuildFailed is routed through the 3-layer174// translation pipeline. Everything else uses a plain error line.175fn reportError(err: anyerror, allocator: std.mem.Allocator) void {176    switch (err) {177        // abort message already printed by output.aborted() — just exit non-zero178        error.HookAborted => {},179        error.BuildFailed => {180            const stderr = errors.getBuildStderr();181            const translated = errors.translateError(allocator, stderr);182            output.buildError(translated);183        },184        error.NetworkError, error.SshFailed, error.SearchFailed => {185            const msg = errors.error_info.getMessage() orelse errors.staticMessage(err);186            const detail = errors.error_info.getDetail();187            const suggestion = errors.error_info.getSuggestion();188            output.printSystemError(msg, detail, suggestion);189        },190        else => {191            const msg = errors.error_info.getMessage() orelse errors.staticMessage(err);192            const detail = errors.error_info.getDetail();193            const suggestion = errors.error_info.getSuggestion();194            output.printError(msg, detail, suggestion);195        },196    }197}198199fn dispatch(ctx: commands.Ctx, cmd: []const u8) !void {200    if (std.mem.eql(u8, cmd, "apply")) return commands.apply(ctx);201    if (std.mem.eql(u8, cmd, "check")) return commands.check(ctx);202    if (std.mem.eql(u8, cmd, "back")) return commands.back(ctx);203    if (std.mem.eql(u8, cmd, "go")) return commands.go(ctx);204    if (std.mem.eql(u8, cmd, "history")) return commands.history(ctx);205    if (std.mem.eql(u8, cmd, "gen")) return commands.genCmd(ctx);206    if (std.mem.eql(u8, cmd, "clean")) return commands.clean(ctx);207    if (std.mem.eql(u8, cmd, "status")) return commands.statusCmd(ctx);208    if (std.mem.eql(u8, cmd, "diff")) return commands.diff(ctx);209    if (std.mem.eql(u8, cmd, "doctor")) return commands.doctor(ctx);210    if (std.mem.eql(u8, cmd, "mood")) return commands.mood(ctx);211    if (std.mem.eql(u8, cmd, "update")) return commands.update(ctx);212    if (std.mem.eql(u8, cmd, "upgrade")) return commands.upgrade(ctx);213    if (std.mem.eql(u8, cmd, "log")) return commands.log(ctx);214    if (std.mem.eql(u8, cmd, "edit")) return commands.edit(ctx);215    if (std.mem.eql(u8, cmd, "fmt")) return commands.fmt(ctx);216    if (std.mem.eql(u8, cmd, "repl")) return commands.repl(ctx);217    if (std.mem.eql(u8, cmd, "develop")) return commands.develop(ctx);218    if (std.mem.eql(u8, cmd, "info")) return commands.info(ctx);219    if (std.mem.eql(u8, cmd, "boot")) return commands.boot(ctx);220    if (std.mem.eql(u8, cmd, "search")) return commands.searchCmd(ctx);221    if (std.mem.eql(u8, cmd, "option")) return commands.optionCmd(ctx);222    if (std.mem.eql(u8, cmd, "install")) return commands.install(ctx);223    if (std.mem.eql(u8, cmd, "remove")) return commands.remove(ctx);224    if (std.mem.eql(u8, cmd, "list")) return commands.list(ctx);225    if (std.mem.eql(u8, cmd, "try")) return commands.tryCmd(ctx);226    if (std.mem.eql(u8, cmd, "service")) return commands.service(ctx);227    if (std.mem.eql(u8, cmd, "flake")) return commands.flake(ctx);228    if (std.mem.eql(u8, cmd, "store")) return commands.store(ctx);229    if (std.mem.eql(u8, cmd, "channel")) return commands.channel(ctx);230    if (std.mem.eql(u8, cmd, "profile")) return commands.profile(ctx);231    if (std.mem.eql(u8, cmd, "pkg")) return commands.pkg(ctx);232    if (std.mem.eql(u8, cmd, "why")) return commands.why(ctx);233    if (std.mem.eql(u8, cmd, "pin")) return commands.pin(ctx);234    if (std.mem.eql(u8, cmd, "unpin")) return commands.unpin(ctx);235    if (std.mem.eql(u8, cmd, "hash")) return commands.hash(ctx);236    if (std.mem.eql(u8, cmd, "fetch")) return commands.fetch(ctx);237    if (std.mem.eql(u8, cmd, "build")) return commands.build(ctx);238    if (std.mem.eql(u8, cmd, "run")) return commands.runCmd(ctx);239    if (std.mem.eql(u8, cmd, "home")) return commands.home(ctx);240    if (std.mem.eql(u8, cmd, "goodbye")) return commands.goodbye(ctx);241    if (std.mem.eql(u8, cmd, "hello")) return commands.hello(ctx);242    if (std.mem.eql(u8, cmd, "help")) { output.help(); return; }243244    errors.error_info.setMessage("unknown command: {s}", .{cmd});245    errors.error_info.setSuggestion("nina help", .{});246    return error.Internal;247}248249fn parseArgs(arena: std.mem.Allocator, argv: []const [:0]const u8) !Args {250    var result = Args{};251    var rest: std.ArrayList([]const u8) = .empty;252    var i: usize = 1; // skip program name253254    // First positional = command255    if (i < argv.len and argv[i][0] != '-') {256        result.command = argv[i];257        i += 1;258    }259260    // Second positional (if not a flag) = subcommand for multi-word commands261    if (i < argv.len and argv[i][0] != '-') {262        const multi_word = isMultiWord(result.command);263        if (multi_word) {264            result.sub = argv[i];265            i += 1;266        }267    }268269    while (i < argv.len) : (i += 1) {270        const a = argv[i];271        if (std.mem.eql(u8, a, "--on") or std.mem.eql(u8, a, "-on")) {272            i += 1;273            if (i < argv.len) result.machine = argv[i];274        } else if (std.mem.eql(u8, a, "--dry")) {275            result.dry = true;276        } else if (std.mem.eql(u8, a, "--check")) {277            result.check = true;278        } else if (std.mem.eql(u8, a, "--version")) {279            result.version = true;280        } else if (std.mem.eql(u8, a, "--no-apply")) {281            result.no_apply = true;282        } else if (std.mem.eql(u8, a, "--all")) {283            result.all = true;284        } else if (std.mem.eql(u8, a, "--user")) {285            result.user = true;286        } else if (std.mem.eql(u8, a, "--json")) {287            result.json = true;288        } else if (std.mem.eql(u8, a, "--last")) {289            i += 1;290            if (i < argv.len) result.last = std.fmt.parseInt(u32, argv[i], 10) catch 50;291        } else if (std.mem.eql(u8, a, "-f")) {292            // -f flag for service logs follow293            try rest.append(arena, "-f");294        } else if (std.mem.eql(u8, a, "--switch")) {295            // --switch flag for `home init` (activate after init)296            try rest.append(arena, "--switch");297        } else if (a.len > 0 and a[0] != '-') {298            try rest.append(arena, a);299        }300        // Ignore unknown flags silently301    }302303    result.rest = try rest.toOwnedSlice(arena);304    return result;305}306307fn isMultiWord(cmd: []const u8) bool {308    const multi = [_][]const u8{ "service", "flake", "store", "channel", "profile", "pkg", "gen", "develop", "edit", "home" };309    for (multi) |m| {310        if (std.mem.eql(u8, cmd, m)) return true;311    }312    return false;313}314315test "parse args basic" {316    const gpa = std.testing.allocator;317    const argv = [_][:0]const u8{ "nina", "apply", "--dry" };318    const args = try parseArgs(gpa, &argv);319    defer gpa.free(args.rest);320    try std.testing.expectEqualStrings("apply", args.command);321    try std.testing.expect(args.dry);322}323324test "parse args with machine" {325    const gpa = std.testing.allocator;326    const argv = [_][:0]const u8{ "nina", "status", "--on", "build-server" };327    const args = try parseArgs(gpa, &argv);328    defer gpa.free(args.rest);329    try std.testing.expectEqualStrings("status", args.command);330    try std.testing.expectEqualStrings("build-server", args.machine.?);331}332333test "parse subcommand" {334    const gpa = std.testing.allocator;335    const argv = [_][:0]const u8{ "nina", "service", "list" };336    const args = try parseArgs(gpa, &argv);337    defer gpa.free(args.rest);338    try std.testing.expectEqualStrings("service", args.command);339    try std.testing.expectEqualStrings("list", args.sub);340}341342test "parse version flag" {343    const gpa = std.testing.allocator;344    const argv = [_][:0]const u8{ "nina", "--version" };345    const args = try parseArgs(gpa, &argv);346    defer gpa.free(args.rest);347    try std.testing.expect(args.version);348}