add verbose flag to oizys dry

pkgs/oizys/oizys-go/cmd/dry.go

@@ -11,10 +11,19 @@ var dryCmd = &cobra.Command{
 	Short: "poor man's nix flake check",
 	Run: func(cmd *cobra.Command, args []string) {
 		oizys.CheckFlake(flake)
-		oizys.NixDryRun(flake, host)
+		oizys.NixDryRun(flake, host, verbose)
 	},
 }
 
+var verbose bool
+
 func init() {
 	rootCmd.AddCommand(dryCmd)
+	dryCmd.Flags().BoolVarP(
+		&verbose,
+		"verbose",
+		"v",
+		false,
+		"show verbose output",
+	)
 }

pkgs/oizys/oizys-go/pkg/oizys/oizys.go

@@ -29,11 +29,12 @@ func TerminalSize() (int, int) {
 	return w, h
 }
 
-func ParseDryRunOutput(nixOutput string) {
+func ParseDryRunOutput(nixOutput string, verbose bool) {
 	output := termenv.NewOutput(os.Stdout)
 	parts := strings.Split(nixOutput, "\nthese")
 	if len(parts) != 3 {
 		log.Println("no changes...")
+		log.Println(output)
 		return
 	}
 	built := strings.Split(strings.TrimSpace(parts[1]), "\n")[1:]
@@ -58,15 +59,18 @@ func ParseDryRunOutput(nixOutput string) {
 		rows = append(rows, table.Row{hash, name})
 	}
 
-	w, _ := TerminalSize()
-	columns := []table.Column{
-		{Title: "hash", Width: 34},
-		{Title: "pkg", Width: int(w / 4)},
+	if verbose {
+
+		w, _ := TerminalSize()
+		columns := []table.Column{
+			{Title: "hash", Width: 34},
+			{Title: "pkg", Width: int(w / 4)},
+		}
+		ShowTable(columns, rows)
 	}
-	ShowTable(columns, rows)
 }
 
-func NixDryRun(flake string, host string) {
+func NixDryRun(flake string, host string, verbose bool) {
 	output := termenv.NewOutput(os.Stdout)
 	path := Output(flake, host)
 	cmd := exec.Command("nix", "build", path, "--dry-run")
@@ -85,7 +89,7 @@ func NixDryRun(flake string, host string) {
 		fmt.Println(string(result))
 		log.Fatal(err)
 	}
-	ParseDryRunOutput(string(result))
+	ParseDryRunOutput(string(result), verbose)
 }
 
 func NixosRebuild(subcmd string, flake string, rest ...string) {

pkgs/oizys/oizys-zig/src/Cli.zig

@@ -34,7 +34,6 @@ pub fn init(allocator: Allocator) !Cli {
         try subcmd.addArg(Arg.positional("forward", null, null));
         try subcmd.addArg(Arg.singleValueOption("flake", 'f', "path to flake"));
         try subcmd.addArg(Arg.singleValueOption("host", null, "hostname (default: current host)"));
-        try subcmd.addArg(Arg.booleanOption("no-pinix", null, "don't use pinix"));
         try oizys.addSubcommand(subcmd.*);
     }
 

pkgs/oizys/oizys-zig/src/Oizys.zig

@@ -9,7 +9,6 @@ host: []const u8,
 cache_name: []const u8,
 output: []const u8,
 cmd: OizysCmd,
-no_pinix: bool,
 debug: bool = false,
 forward: ?[][]const u8,
 
@@ -25,39 +24,52 @@ pub const OizysCmd = enum {
 pub fn init(allocator: std.mem.Allocator, matches: *const ArgMatches, forward: ?[][]const u8) !Oizys {
     const cmd = matches.subcommand.?.name;
     const flags = matches.subcommandMatches(cmd).?;
-    const host = flags.getSingleValue("host") orelse
-        try Oizys.getDefaultHostName(allocator);
-    const flake = flags.getSingleValue("flake") orelse
-        try Oizys.getDefaultFlake(allocator);
-
-    return Oizys{
+    var oizys = Oizys{
         .allocator = allocator,
-        .host = host,
-        .flake = flake,
-        .output = try std.fmt.allocPrint(
-            allocator,
-            "{s}#nixosConfigurations.{s}.config.system.build.toplevel",
-            .{ flake, host },
-        ),
+        .host = undefined,
+        .flake = undefined,
+        .output = undefined,
         .cmd = std.meta.stringToEnum(OizysCmd, cmd).?,
         .cache_name = flags.getSingleValue("cache") orelse "daylin",
-        .no_pinix = flags.containsArg("no-pinix"),
         .forward = forward,
     };
+    if (flags.getSingleValue("host")) |host| {
+        oizys.host = try allocator.dupe(u8, host);
+    } else {
+        oizys.host = try Oizys.getDefaultHostName(allocator);
+    }
+    if (flags.getSingleValue("flake")) |flake| {
+        oizys.flake = try allocator.dupe(u8, flake);
+    } else {
+        oizys.flake = try Oizys.getDefaultFlake(allocator);
+    }
+
+    oizys.output = try std.fmt.allocPrint(
+        allocator,
+        "{s}#nixosConfigurations.{s}.config.system.build.toplevel",
+        .{ oizys.flake, oizys.host },
+    );
+
+    return oizys;
+    // return Oizys{
+    //     .allocator = allocator,
+    //     .host = host,
+    //     .flake = flake,
+    //     .output = try std.fmt.allocPrint(
+    //         allocator,
+    //         "{s}#nixosConfigurations.{s}.config.system.build.toplevel",
+    //         .{ flake, host },
+    //     ),
+    //     .cmd = std.meta.stringToEnum(OizysCmd, cmd).?,
+    //     .cache_name = flags.getSingleValue("cache") orelse "daylin",
+    //     .forward = forward,
+    // };
 }
 
 pub fn deinit(self: *Oizys) void {
     self.allocator.free(self.flake);
-    self.allocator.free(self.host);
     self.allocator.free(self.output);
-}
-
-pub fn nix(self: *Oizys) []const u8 {
-    return if (self.no_pinix) "nix" else "pix";
-}
-
-pub fn nixos_rebuild(self: *Oizys) []const u8 {
-    return if (self.no_pinix) "nixos-rebuild" else "pixos-rebuild";
+    self.allocator.free(self.host);
 }
 
 pub fn getDefaultHostName(allocator: Allocator) ![]const u8 {
@@ -89,8 +101,8 @@ pub fn runNixCmd(self: *Oizys, cmd: NixCmd, argv: []const []const u8) !void {
     defer args.deinit();
 
     switch (cmd) {
-        NixCmd.Nix => try args.append(self.nix()),
-        NixCmd.NixosRebuild => try args.appendSlice(&.{ "sudo", self.nixos_rebuild() }),
+        NixCmd.Nix => try args.append("nix"),
+        NixCmd.NixosRebuild => try args.appendSlice(&.{ "sudo", "nixos-rebuild" }),
     }
     try args.appendSlice(argv);
     if (self.forward) |fwd| try args.appendSlice(fwd);
@@ -117,12 +129,77 @@ pub fn cache(self: *Oizys) !void {
     _ = try p.spawnAndWait();
 }
 
+const DryResult = struct {
+    allocator: Allocator,
+    fetch: [][]const u8,
+    build: [][]const u8,
+
+    pub fn parse(allocator: Allocator, output: []const u8) !DryResult {
+        var it = std.mem.splitSequence(u8, output, ":\n");
+        _ = it.next();
+        var fetch = std.ArrayList([]const u8).init(allocator);
+        var build = std.ArrayList([]const u8).init(allocator);
+
+        if (it.next()) |x| {
+            try parseLines(x, &fetch);
+        } else {
+            return error.DryParseError;
+        }
+
+        if (it.next()) |x| {
+            try parseLines(x, &build);
+        } else {
+            return error.DryParseError;
+        }
+
+        return .{
+            .allocator = allocator,
+            .fetch = try fetch.toOwnedSlice(),
+            .build = try build.toOwnedSlice(),
+        };
+    }
+
+    pub fn deinit(self: *DryResult) void {
+        self.allocator.free(self.fetch);
+        self.allocator.free(self.build);
+        // for (self.fetch) |item| {
+        // self.allocator.free(item);
+        // }
+        // for (self.build) |item| {
+        //     self.allocator.free(item);
+        // }
+    }
+    fn parseLines(buffer: []const u8, list: *std.ArrayList([]const u8)) !void {
+        var lines = std.mem.splitSequence(u8, buffer, "\n");
+        while (lines.next()) |line| {
+            try list.append(line);
+        }
+    }
+};
+
+pub fn dry(self: *Oizys) !void {
+    const cmd_output = try std.ChildProcess.run(.{
+        .allocator = self.allocator,
+        .argv = &.{ "nix", "build", self.output, "--dry-run" },
+    });
+    defer self.allocator.free(cmd_output.stdout);
+    defer self.allocator.free(cmd_output.stderr);
+    var result = try DryResult.parse(self.allocator, cmd_output.stderr);
+    defer result.deinit();
+
+    std.debug.print(
+        "to fetch: {d}\nto build: {d}\n",
+        .{ result.fetch.len, result.build.len },
+    );
+}
+
 pub fn run(self: *Oizys) !void {
     switch (self.cmd) {
-        .@"switch" => try self.runNixCmd(NixCmd.NixosRebuild, &.{ "switch", "--flake", self.flake }),
-        .boot => try self.runNixCmd(NixCmd.NixosRebuild, &.{ "boot", "--flake", self.flake }),
-        .dry => try self.runNixCmd(NixCmd.Nix, &.{ "build", self.output, "--dry-run" }),
-        .build => try self.runNixCmd(NixCmd.Nix, &.{ "build", self.output }),
+        .@"switch" => try self.runNixCmd(.NixosRebuild, &.{ "switch", "--flake", self.flake }),
+
+        .boot => try self.runNixCmd(.NixosRebuild, &.{ "boot", "--flake", self.flake }),
+        .dry => try self.dry(),
+        .build => try self.runNixCmd(.Nix, &.{ "build", self.output }),
         .output => {
             const stdout = std.io.getStdOut().writer();
             try stdout.print("{s}\n", .{self.output});

pkgs/oizys/oizys-zig/src/main.zig

@@ -4,9 +4,13 @@ const Cli = @import("Cli.zig");
 
 pub fn main() !void {
     // memory management isn't hard :P
-    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
-    defer arena.deinit();
-    const allocator = arena.allocator();
+    // var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    // defer arena.deinit();
+    // const allocator = arena.allocator();
+    //
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    const allocator = gpa.allocator();
+    defer _ = gpa.deinit();
 
     var cli = try Cli.init(allocator);
     try cli.parse();