Use build.zig.zon to install node header dependency

This uses a path because with the current version of zig there is an
issue initiating a tls connection with cloudflare which is where node
stores its releases.

Until that is fixed I am going to use a local path.

See ziglang/zig#21747

.gitignore

@@ -1,3 +1,2 @@
 zig-out/
 .zig-cache/
-.cache/

build.zig

@@ -15,6 +15,12 @@ pub fn build(b: *std.Build) void {
     // set a preferred release mode, allowing the user to decide how to optimize.
     const optimize = b.standardOptimizeOption(.{});
 
+    const node = b.dependency("node", .{
+        .target = target,
+        .optimize = optimize,
+    });
+    const node_headers = node.path("include/node");
+
     const lib = b.addStaticLibrary(.{
         .name = "node-zig",
         // In this case the main source file is merely a path, however, in more
@@ -24,10 +30,7 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    lib.addIncludePath(.{ .src_path = .{
-        .owner = b,
-        .sub_path = ".cache/node/node-v20.18.0/include/node",
-    } });
+    lib.addIncludePath(node_headers);
 
     // This declares intent for the library to be installed into the standard
     // location when the user invokes the "install" step (the default step when
@@ -42,10 +45,7 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    lib_unit_tests.addIncludePath(.{ .src_path = .{
-        .owner = b,
-        .sub_path = ".cache/node/node-v20.18.0/include/node",
-    } });
+    lib_unit_tests.addIncludePath(node_headers);
 
     const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);
 
@@ -64,10 +64,7 @@ pub fn build(b: *std.Build) void {
     nodeAddon.linker_allow_shlib_undefined = true;
 
     nodeAddon.linkLibrary(lib);
-    nodeAddon.addIncludePath(.{ .src_path = .{
-        .owner = b,
-        .sub_path = ".cache/node/node-v20.18.0/include/node",
-    } });
+    nodeAddon.addIncludePath(node_headers);
     nodeAddon.linkLibC();
     nodeAddon.addCSourceFile(.{
         .file = .{ .src_path = .{

build.zig.zon

@@ -23,6 +23,9 @@
     // Once all dependencies are fetched, `zig build` no longer requires
     // internet connectivity.
     .dependencies = .{
+        .node = .{
+            .path = "../../node-v22.11.0",
+        },
         // See `zig fetch --save <url>` for a command-line interface for adding dependencies.
         //.example = .{
         //    // When updating this field to a new URL, be sure to delete the corresponding