initial commit

2026-10-31 07:18:22 +00:00 · 2026-03-21 22:46:54 -04:00
parent cf7df37498
commit 9e065ee023
45 changed files with 4430 additions and 0 deletions
@@ -0,0 +1,111 @@
+const std = @import("std");
+
+const Arch = std.Target.Cpu.Arch;
+
+fn addLimineTool(b: *std.Build, limine: *std.Build.Dependency) *std.Build.Step.Compile {
+    const tool = b.addExecutable(.{ .name = "limine", .root_module = b.addModule("limine", .{
+        .target = b.graph.host,
+        .link_libc = true,
+    }) });
+    tool.root_module.addCSourceFile(.{ .file = limine.path("limine.c") });
+    return tool;
+}
+
+pub const IsoResult = struct {
+    step: *std.Build.Step,
+    path: std.Build.LazyPath,
+};
+
+pub fn addIso(
+    b: *std.Build,
+    arch: Arch,
+    image_name: []const u8,
+    kernel: *std.Build.Step.Compile,
+    limine: *std.Build.Dependency,
+) IsoResult {
+    const limine_tool = addLimineTool(b, limine);
+    const kernel_bin = kernel.getEmittedBin();
+
+    const prep_script =
+        \\set -euo pipefail
+        \\kernel="$1"
+        \\iso_root="$2"
+        \\limine_conf="$3"
+        \\limine_dir="$4"
+        \\arch="$5"
+        \\rm -rf "$iso_root"
+        \\mkdir -p "$iso_root/boot/limine" "$iso_root/EFI/BOOT"
+        \\cp "$kernel" "$iso_root/boot/kernel"
+        \\cp "$limine_conf" "$iso_root/boot/limine/limine.conf"
+        \\case "$arch" in
+        \\  x86_64)
+        \\    cp "$limine_dir/limine-bios.sys" "$limine_dir/limine-bios-cd.bin" "$limine_dir/limine-uefi-cd.bin" "$iso_root/boot/limine/"
+        \\    cp "$limine_dir/BOOTX64.EFI" "$limine_dir/BOOTIA32.EFI" "$iso_root/EFI/BOOT/"
+        \\    ;;
+        \\  aarch64)
+        \\    cp "$limine_dir/limine-uefi-cd.bin" "$iso_root/boot/limine/"
+        \\    cp "$limine_dir/BOOTAA64.EFI" "$iso_root/EFI/BOOT/"
+        \\    ;;
+        \\  riscv64)
+        \\    cp "$limine_dir/limine-uefi-cd.bin" "$iso_root/boot/limine/"
+        \\    cp "$limine_dir/BOOTRISCV64.EFI" "$iso_root/EFI/BOOT/"
+        \\    ;;
+        \\  loongarch64)
+        \\    cp "$limine_dir/limine-uefi-cd.bin" "$iso_root/boot/limine/"
+        \\    cp "$limine_dir/BOOTLOONGARCH64.EFI" "$iso_root/EFI/BOOT/"
+        \\    ;;
+        \\esac
+    ;
+
+    const iso_root = b.addTempFiles();
+
+    const prep = b.addSystemCommand(&.{ "bash", "-ceu", prep_script, "--" });
+
+    prep.addFileArg(kernel_bin);
+    prep.addDirectoryArg(iso_root.getDirectory());
+    prep.addFileArg(b.path("build/limine.conf"));
+    prep.addDirectoryArg(limine.path("."));
+    prep.addArg(@tagName(arch));
+    prep.step.dependOn(&iso_root.step);
+
+    const mkiso = b.addSystemCommand(&.{ "xorriso", "-as", "mkisofs", "-R", "-r", "-J" });
+    switch (arch) {
+        .x86_64 => mkiso.addArgs(&.{
+            "-b",                             "boot/limine/limine-bios-cd.bin",
+            "-no-emul-boot",                  "-boot-load-size",
+            "4",                              "-boot-info-table",
+            "-hfsplus",                       "-apm-block-size",
+            "2048",                           "--efi-boot",
+            "boot/limine/limine-uefi-cd.bin", "-efi-boot-part",
+            "--efi-boot-image",               "--protective-msdos-label",
+        }),
+        else => mkiso.addArgs(&.{
+            "-hfsplus",
+            "-apm-block-size",
+            "2048",
+            "--efi-boot",
+            "boot/limine/limine-uefi-cd.bin",
+            "-efi-boot-part",
+            "--efi-boot-image",
+            "--protective-msdos-label",
+        }),
+    }
+    mkiso.addDirectoryArg(iso_root.getDirectory());
+    mkiso.addArg("-o");
+    const iso_out = mkiso.addOutputFileArg(b.fmt("{s}.iso", .{image_name}));
+    mkiso.step.dependOn(&prep.step);
+
+    if (arch == .x86_64) {
+        const bios_install = b.addRunArtifact(limine_tool);
+        bios_install.addArg("bios-install");
+        bios_install.addFileArg(iso_out);
+        bios_install.step.dependOn(&mkiso.step);
+    }
+
+    const install_iso = b.addInstallFile(iso_out, b.fmt("{s}.iso", .{image_name}));
+    install_iso.step.dependOn(&mkiso.step);
+    return .{
+        .step = &install_iso.step,
+        .path = iso_out,
+    };
+}