refactor(build): Clean up

Signed-off-by: prajwalch <prajwal.chapagain58@gmail.com>

build.zig

@@ -1,41 +1,50 @@
 const std = @import("std");
 
 pub fn build(b: *std.Build) void {
-    const yazap_mod = b.addModule("yazap", .{ .root_source_file = b.path("src/lib.zig") });
-
-    const target = b.standardTargetOptions(.{});
-    const optimize = b.standardOptimizeOption(.{});
-
-    const test_step = b.step("test", "Run library tests");
-    const unit_tests = b.addTest(.{
-        .root_source_file = b.path("src/test.zig"),
-        .target = target,
-        .optimize = optimize,
-    });
-    const run_unit_tests = b.addRunArtifact(unit_tests);
-    test_step.dependOn(&run_unit_tests.step);
-
-    const docs_test = b.addTest(.{ .root_source_file = b.path("src/lib.zig") });
-    const install_docs = b.addInstallDirectory(.{
-        .source_dir = docs_test.getEmittedDocs(),
-        .install_dir = .prefix,
-        .install_subdir = "docs",
-    });
-    const docs_step = b.step("docs", "Generate docs");
-    docs_step.dependOn(&install_docs.step);
-
-    const examples_step = b.step("examples", "Build all the example");
-
-    inline for (.{ "git", "touch", "ls" }) |example_name| {
-        const example = b.addExecutable(.{
+    const yazap = b.addModule("yazap", .{ .root_source_file = b.path("src/lib.zig") });
+
+    testStep(b);
+    examplesStep(b, yazap);
+}
+
+fn testStep(b: *std.Build) void {
+    // Test file information.
+    const tests = b.addTest(.{ .root_source_file = b.path("src/test.zig") });
+    // This runs the unit tests.
+    const runner = b.addRunArtifact(tests);
+
+    const step = b.step("test", "Run unit tests");
+    step.dependOn(&runner.step);
+}
+
+fn examplesStep(b: *std.Build, yazap: *std.Build.Module) void {
+    const step = b.step("examples", "Build all the examples");
+
+    var dir = std.fs.cwd().openDir("./examples/", .{ .iterate = true }) catch @panic(
+        "failed to open examples dir",
+    );
+    defer dir.close();
+
+    var examples = dir.iterate();
+    while (examples.next() catch @panic("failed to get example file")) |example_file| {
+        std.debug.assert(example_file.kind == .file);
+
+        // Example file path.
+        const example_file_path = b.path(b.fmt("examples/{s}", .{example_file.name}));
+        // Example file name without extension.
+        const example_name = std.fs.path.stem(example_file_path.getDisplayName());
+
+        // Binary information of an example.
+        const executable = b.addExecutable(.{
             .name = example_name,
-            .root_source_file = b.path(b.fmt("examples/{s}.zig", .{example_name})),
-            .target = target,
-            .optimize = optimize,
+            .root_source_file = example_file_path,
+            .target = b.graph.host,
         });
-        const install_example = b.addInstallArtifact(example, .{});
-        example.root_module.addImport("yazap", yazap_mod);
-        examples_step.dependOn(&example.step);
-        examples_step.dependOn(&install_example.step);
+        // Add yazap as a dependency.
+        executable.root_module.addImport("yazap", yazap);
+
+        // This copies the compiled binary to the `.zig-out/bin`.
+        const installer = b.addInstallArtifact(executable, .{});
+        step.dependOn(&installer.step);
     }
 }