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build: make build.zig generate helptags without running "nvim" binary

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This is matters for cross-compiling where we might not
be able to run the "nvim" binary on the host.

Instead reimplement the helptags extractor as a small
lua script, which we can run on the host using the nlua0
helper already used for other generator scripts.
This commit is contained in:
bfredl
2025-05-25 14:14:28 +02:00
parent 25bc41847e
commit 6b936002cc
6 changed files with 104 additions and 12 deletions
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11
build.zig
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@@ -82,15 +82,20 @@ pub fn build(b: *std.Build) !void {
const libuv_dep = b.dependency("libuv", .{ .target = target, .optimize = optimize });
const libuv = libuv_dep.artifact("uv");
const libluv = try build_lua.build_libluv(b, target, optimize, lua, libuv);
const libluv_host = if (cross_compiling) libluv_host: {
const libuv_dep_host = b.dependency("libuv", .{ .target = target_host, .optimize = optimize_host });
const libuv_host = libuv_dep_host.artifact("uv");
break :libluv_host try build_lua.build_libluv(b, target_host, optimize_host, ziglua_host.artifact("lua"), libuv_host);
} else libluv;
const utf8proc = b.dependency("utf8proc", .{ .target = target, .optimize = optimize });
const unibilium = b.dependency("unibilium", .{ .target = target, .optimize = optimize });
// TODO(bfredl): fix upstream bugs with UBSAN
const treesitter = b.dependency("treesitter", .{ .target = target, .optimize = .ReleaseFast });
const nlua0 = build_lua.build_nlua0(b, target_host, optimize_host, host_use_luajit, ziglua_host, lpeg);
const nlua0 = build_lua.build_nlua0(b, target_host, optimize_host, host_use_luajit, ziglua_host, lpeg, libluv_host);
// usual caveat emptor: might need to force a rebuild if the only change is
// addition of new .c files, as those are not seen by any hash
@@ -331,7 +336,7 @@ pub fn build(b: *std.Build) !void {
nvim_exe_step.dependOn(&nvim_exe_install.step);
const gen_runtime = try runtime.nvim_gen_runtime(b, nlua0, nvim_exe, funcs_data);
const gen_runtime = try runtime.nvim_gen_runtime(b, nlua0, funcs_data);
const runtime_install = b.addInstallDirectory(.{ .source_dir = gen_runtime.getDirectory(), .install_dir = .prefix, .install_subdir = "runtime/" });
const nvim = b.step("nvim", "build the editor");