feat: reconfigure zba-gdbstub as a library

build.zig

@@ -1,20 +1,50 @@
 const std = @import("std");
 
-pub fn build(b: *std.build.Builder) void {
-    // Standard target options allows the person running `zig build` to choose
-    // what target to build for. Here we do not override the defaults, which
-    // means any target is allowed, and the default is native. Other options
-    // for restricting supported target set are available.
-    const target = b.standardTargetOptions(.{});
+fn path(comptime suffix: []const u8) []const u8 {
+    if (suffix[0] == '/') @compileError("expected a relative path");
+    return comptime (std.fs.path.dirname(@src().file) orelse ".") ++ std.fs.path.sep_str ++ suffix;
+}
 
-    // Standard release options allow the person running `zig build` to select
-    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
-    const mode = b.standardReleaseOptions();
+const pkgs = struct {
+    const Pkg = std.build.Pkg;
 
-    const exe = b.addExecutable("zba-gdbstub", "src/main.zig");
+    pub const gdbstub: Pkg = .{
+        .name = "gdbstub",
+        .source = .{ .path = path("src/lib.zig") },
+        .dependencies = &[_]Pkg{network},
+    };
 
     // https://github.com/MasterQ32/zig-network
-    exe.addPackagePath("network", "lib/zig-network/network.zig");
+    pub const network: Pkg = .{
+        .name = "network",
+        .source = .{ .path = path("lib/zig-network/network.zig") },
+    };
+};
+
+pub fn link(exe: *std.build.LibExeObjStep) void {
+    exe.addPackage(pkgs.gdbstub);
+}
+
+pub fn build(b: *std.build.Builder) void {
+    const target = b.standardTargetOptions(.{});
+    const mode = b.standardReleaseOptions();
+
+    // -- library --
+    const lib = b.addStaticLibrary("gdbstub", "src/lib.zig");
+    lib.addPackage(pkgs.network);
+
+    lib.setBuildMode(mode);
+    lib.install();
+
+    const lib_tests = b.addTest("src/lib.zig");
+    lib_tests.setBuildMode(mode);
+
+    const test_step = b.step("lib-test", "Run Library Tests");
+    test_step.dependOn(&lib_tests.step);
+
+    // -- Executable --
+    const exe = b.addExecutable("gdbserver", "src/main.zig");
+    link(exe);
 
     exe.setTarget(target);
     exe.setBuildMode(mode);
@@ -22,17 +52,8 @@ pub fn build(b: *std.build.Builder) void {
 
     const run_cmd = exe.run();
     run_cmd.step.dependOn(b.getInstallStep());
-    if (b.args) |args| {
-        run_cmd.addArgs(args);
-    }
+    if (b.args) |args| run_cmd.addArgs(args);
 
     const run_step = b.step("run", "Run the app");
     run_step.dependOn(&run_cmd.step);
-
-    const exe_tests = b.addTest("src/main.zig");
-    exe_tests.setTarget(target);
-    exe_tests.setBuildMode(mode);
-
-    const test_step = b.step("test", "Run unit tests");
-    test_step.dependOn(&exe_tests.step);
 }

src/main.zig

@@ -1,9 +1,5 @@
 const std = @import("std");
-const network = @import("network");
-const Server = @import("Server.zig");
-
-const Allocator = std.mem.Allocator;
-const Socket = network.Socket;
+const Server = @import("gdbstub").Server;
 
 pub fn main() !void {
     const log = std.log.scoped(.Main);