From 98b62629795e24de19f535f1072b8a25dcf9f018 Mon Sep 17 00:00:00 2001 From: Gabriel Schneider Date: Thu, 27 Aug 2026 16:42:15 -0300 Subject: build: pardes builds without the ESP32-P4 toolchain checkout beside it `build.zig.zon` named `../05-zig-p4` as a path dependency, and `build.zig` `@import`ed it inside `if (-Desp32p4-firmware)`. But `@import` in a build script is resolved when the SCRIPT is compiled, not when the branch that needs it is taken -- so naming the package at all meant anyone without that sibling checkout could not build pardes AT ALL. Not the firmware: the terminal shell, the SDL shell, the tests. `zig build` failed with build.zig:1073: error: no module named 'zig_p4' available within module 'root.@build' from a line inside an `if` that was false. Neither escape hatch works for a PATH dependency, and both were tried rather than assumed. `.lazy = true` is about FETCHING; a path dep whose directory is absent is generated as a package with no `build.zig` rather than one marked unavailable, so `b.lazyImport` -- which exists for exactly this and is what the standard library says is to `@import` what `lazyDependency` is to `dependency` -- reaches a `@compileError` instead of returning null. Making it a fetched dependency instead is not available either: the toolchain has no remote. So the duplicate goes. That build tree's firmware block linked an image the toolchain repository already knows how to link -- its own build.zig has `-Dpardes`, `-Dapp=` and `-Dpardes-obj=`, and its comments record having learned this same lesson from the other direction, where nesting pardes's ~30-package graph under it broke every build there. The object is the seam: it crosses by PATH and never by package, and each repository builds what it owns the pieces of. zig build -Dplatform=esp32p4 # here, no toolchain needed zig build -Dpardes # there, the console image zig build -Dpardes -Dapp=/src/esp32p4_9p.zig # there, the 9P image For the second and third to work with no module map, `src/board9p.zig` and the 9P firmware root now reach the codec by PATH instead of through a named `ninep` module that only pardes's own build.zig knew to inject -- which is also why the root moved from `src/esp32p4/nine.zig` up to `src/esp32p4_9p.zig`, beside `src/esp32p4.zig`: a path import may not escape its module's own directory. Both files are now self-contained, and `zig test src/board9p.zig` works with no flags. `-Desp32p4-port`, `-Desp32p4-prof` and `-Desp32p4-cpu-mhz` go with the block. An option this build cannot honour is worse than no option, because it accepts the flag and then ignores it; all three are spelled the same way in the toolchain. Verified by moving ../05-zig-p4 out of the way: `zig build`, `zig build -Dplatform=esp32p4` and `zig build unit-test` all pass without it. With it back, the toolchain still links both images -- console 812,720 B, 9P 88,096 B. next-steps.txt gains the six features the 9P chain shipped. --- docs/9p.pdf | 6 +++--- docs/registry.pdf | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) (limited to 'docs') diff --git a/docs/9p.pdf b/docs/9p.pdf index 9d2dc054..961473bc 100644 --- a/docs/9p.pdf +++ b/docs/9p.pdf @@ -2773,12 +2773,12 @@ F endstream endobj 748 0 obj -<> +<> endobj 749 0 obj <> stream -Typst 0.15.1en2026-08-27T16:19:44-03:002026-08-27T16:19:44-03:0012application/pdfHljsDPgWqw9TTnj4ezsOYg==HljsDPgWqw9TTnj4ezsOYg==proof1.7 +Typst 0.15.1en2026-08-27T22:09:04-03:002026-08-27T22:09:04-03:0012application/pdfeoOUAEv34jOjSGsTdiY5Ag==eoOUAEv34jOjSGsTdiY5Ag==proof1.7 endstream endobj 750 0 obj @@ -3538,7 +3538,7 @@ xref 0000178455 00000 n 0000179529 00000 n trailer -<> +<> startxref 179734 %%EOF \ No newline at end of file diff --git a/docs/registry.pdf b/docs/registry.pdf index b714d5ad..ce7d0ef6 100644 --- a/docs/registry.pdf +++ b/docs/registry.pdf @@ -6478,12 +6478,12 @@ x endstream endobj 1872 0 obj -<> +<> endobj 1873 0 obj <> stream -Typst 0.15.1en2026-08-27T18:10:39-03:002026-08-27T18:10:39-03:0020application/pdfZR7RqpW3YzCeQ3Vzke06dw==ZR7RqpW3YzCeQ3Vzke06dw==proof1.7 +Typst 0.15.1en2026-08-27T22:09:03-03:002026-08-27T22:09:03-03:0020application/pdfifdbNKHCMpMjAW51d8hH/Q==ifdbNKHCMpMjAW51d8hH/Q==proof1.7 endstream endobj 1874 0 obj @@ -8367,7 +8367,7 @@ xref 0000402637 00000 n 0000403712 00000 n trailer -<> +<> startxref 403916 %%EOF \ No newline at end of file -- cgit v1.3