diff options
Diffstat (limited to 'build.zig')
| -rw-r--r-- | build.zig | 25 |
1 files changed, 25 insertions, 0 deletions
@@ -292,6 +292,31 @@ pub fn build(b: *std.Build) void { // renderer stays next to the vaxis it needs, and the boundary is bytes in / bytes out. const obj = b.option([]const u8, "pardes-obj", "path to pardes's p4 object (default ../02-pardes-code/zig-out/pardes-p4.o)") orelse "../02-pardes-code/zig-out/pardes-p4.o"; + + // THE GRID, set from here, because the object is where it is baked and the object is built + // by the other repository. Without this, changing the geometry is two commands in two + // directories and the second one silently links whatever the first one left behind - which is + // exactly the shape of mistake that ends with a firmware whose grid does not match the + // firmware you think you flashed. + // + // Implemented as a nested `zig build`, not a package dependency, for the reasons above: the + // seam between these repositories is a file, and it stays a file. This only reaches across it + // to ask for the file to be made a particular way. Skipped entirely when `-Dpardes-obj` names + // an object explicitly, because then the caller has said which one they want. + const cols = b.option(u16, "cols", "board grid width in cells; rebuilds pardes's object"); + const rows = b.option(u16, "rows", "board grid height in cells; rebuilds pardes's object"); + if ((cols != null or rows != null) and b.user_input_options.get("pardes-obj") == null) { + const editor_dir = std.fs.path.dirname(std.fs.path.dirname(obj) orelse ".") orelse ".."; + const build_editor = b.addSystemCommand(&.{ b.graph.zig_exe, "build", "-Dplatform=p4" }); + build_editor.setCwd(.{ .cwd_relative = editor_dir }); + if (cols) |c| build_editor.addArg(b.fmt("-Dp4-cols={d}", .{c})); + if (rows) |v| build_editor.addArg(b.fmt("-Dp4-rows={d}", .{v})); + // Its output is a file this build then links, and the linker has no idea it is generated, + // so the ordering has to be said out loud. + build_editor.has_side_effects = true; + app.step.dependOn(&build_editor.step); + } + app.root_module.addObjectFile(if (std.fs.path.isAbsolute(obj)) .{ .cwd_relative = obj } else |