Reworked the build system

build.zig

@@ -2,47 +2,98 @@ const std = @import("std");
 
 pub fn build(b: *std.Build) void {
 
-    // Compilation options
+    //// Compilation options
+
+    // Static/Dynamic linkage
     const opt_shared = b.option(
         bool,
         "shared",
         "Build as a dynamic (shared) library",
     ) orelse false;
 
-    const linkage: std.builtin.LinkMode = if (opt_shared)
-        .static
-    else
-        .dynamic;
+    // `zig build test`
+    const opt_test = b.step(
+        "test",
+        "Run library tests",
+    );
 
-    // Configuration
-    const target = b.standardTargetOptions(.{});
-    const optimize = b.standardOptimizeOption(.{});
+    //// Build Context
+    var ctx = BuilderContext{
+        .b = b,
+        // Configuration
+        .target = b.standardTargetOptions(.{}),
+        .optimize = b.standardOptimizeOption(.{}),
+        .linkage = if (opt_shared) .static else .dynamic,
+        .test_step = opt_test
+    };
 
+
+    //// Library
+    
     // Create root module
-    const root_module = b.createModule(.{
-        .root_source_file = b.path("src/root.zig"),
-        .target = target,
-        .optimize = optimize,
-    });
+    const root_module = ctx.createModule("src/root.zig");
 
     // Create library
-    const lib = b.addLibrary(.{
+    const lib_obj = b.addLibrary(.{
         .name = "reticulum-zero",
-        .linkage = linkage,
+        .linkage = ctx.linkage,
         .root_module = root_module,
     });
 
     // Output library object
-    b.installArtifact(lib);
+    b.installArtifact(lib_obj);
 
-    // Set up unit testing
-    // const unit_tests = b.addTest(.{
-    //     .root_module = root_module,
-    // });
 
-    // const run_unit_tests = b.addRunStep(unit_tests);
-
-    // `zig build test` command
-    // const test_step = b.step("test", "Run library unit tests");
-    // test_step.dependency(&run_unit_tests.step);
+    ////////// Testing
+    //
+    
+    ctx.addTestModule(root_module);
+    ctx.addTestFile("src/packet.zig");
 }
+
+
+////////////// BuildContext
+//
+
+// Holds all the context values during build and provides related functions
+const BuilderContext = struct {
+ 
+    ////////// Properties
+    //
+
+    b: *std.Build,
+    target: std.Build.ResolvedTarget,
+    optimize: std.builtin.OptimizeMode,
+    linkage: std.builtin.LinkMode,
+    test_step: *std.Build.Step,
+
+    ////////// Functions
+    //
+
+    // Creates a zig build module
+    fn createModule(self: *BuilderContext, file: []const u8) *std.Build.Module {
+
+        return self.b.createModule(.{
+            .root_source_file = self.b.path(file),
+            .target = self.target,
+            .optimize = self.optimize,
+        });
+    }
+    
+    // Adds a source file's own tests to the tests list
+    fn addTestFile(self: *BuilderContext, file: []const u8) void {
+
+        const module = self.createModule(file);
+        self.addTestModule(module);
+    }
+
+    // Adds a module's own tests to the tests list
+    fn addTestModule(self: *BuilderContext, module: *std.Build.Module) void {
+
+        const unit_tests = self.b.addTest(.{
+            .root_module = module,
+        });
+        const run_tests = self.b.addRunArtifact(unit_tests);
+        self.test_step.dependOn(&run_tests.step);
+    }
+};