build: workaround lack of -n on gnu xxd

Author: ochafik

build.zig

@@ -142,10 +142,7 @@ pub fn build(b: *std.build.Builder) !void {
 
     const server_assets = [_][]const u8{ "index.html", "index.js", "completion.js", "json-schema-to-grammar.mjs" };
     for (server_assets) |asset| {
-        // Note: code can be simplified once setCwd is standard.
-        const gen_hpp = b.addSystemCommand(
-            &.{ "xxd", "-n", asset, "-i", b.fmt("examples/server/public/{s}", .{asset}), b.fmt("examples/server/{s}.hpp", .{asset}) },
-        );
+        const gen_hpp = b.addSystemCommand(&.{ "bash", "-c", b.fmt("cd examples/server/public && xxd -i {s} ../{s}.hpp", .{ asset, asset }) });
         server.step.dependOn(&gen_hpp.step);
     }
 }

examples/server/CMakeLists.txt

@@ -1,4 +1,4 @@
-set(SERVER_ASSETS 
+set(SERVER_ASSETS
     index.html
     index.js
     completion.js