add: zig and build.sh

build systems

toolchain/lib/builder.lua

@@ -3,7 +3,7 @@
 -- Handles the full build pipeline for a recipe:
 --   1. fetch_source   — download to cache (or detect git)
 --   2. extract_source — unpack tarball or clone git repo
---   3. run_build      — dispatch autotools/cmake/meson/make/cargo/custom
+--   3. run_build      — dispatch autotools/cmake/meson/make/cargo/zig/build.sh/custom
 --   4. run_test       — execute post-build verification command
 --
 -- All subprocesses run in a minimal environment. Build tools (meson, cmake,
@@ -298,6 +298,16 @@ function builder.run_build(recipe, source_dir, stage_dir, opts)
     end
     run("install -D " .. path.quote(target) .. " " .. path.quote(path.join(bin_dir, path.basename(target))))
 
+  elseif bs == "zig" then
+    run("zig build -Doptimize=ReleaseSafe" .. args_str)
+    run("zig build install --prefix /usr -Ddestdir=" .. path.quote(stage_dir))
+
+  elseif bs == "build.sh" then
+    if not path.exists(path.join(source_dir, "build.sh")) then
+      error(("no build.sh script found in %s (build_system is 'build.sh')"):format(source_dir), 0)
+    end
+    run("DESTDIR=" .. path.quote(stage_dir) .. " sh build.sh")
+
   elseif bs == "custom" then
     local script = recipe.build_script
     run("DESTDIR=" .. path.quote(stage_dir) .. " sh " .. path.quote(script))