74 lines
2.5 KiB
Zig
74 lines
2.5 KiB
Zig
const root = @import("@build@");
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const std = @import("std");
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const io = std.io;
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const fmt = std.fmt;
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const Builder = std.build.Builder;
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const Pkg = std.build.Pkg;
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const InstallArtifactStep = std.build.InstallArtifactStep;
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const LibExeObjStep = std.build.LibExeObjStep;
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const ArrayList = std.ArrayList;
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///! This is a modified build runner to extract information out of build.zig
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///! Modified from the std.special.build_runner
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pub fn main() !void {
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var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
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defer arena.deinit();
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const allocator = &arena.allocator;
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const builder = try Builder.create(allocator, "", "", "", "");
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defer builder.destroy();
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builder.resolveInstallPrefix(null, Builder.DirList{});
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try runBuild(builder);
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const stdout_stream = io.getStdOut().writer();
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// TODO: We currently add packages from every LibExeObj step that the install step depends on.
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// Should we error out or keep one step or something similar?
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// We also flatten them, we should probably keep the nested structure.
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for (builder.top_level_steps.items) |tls| {
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for (tls.step.dependencies.items) |step| {
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try processStep(stdout_stream, step);
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}
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}
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}
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fn processStep(stdout_stream: anytype, step: *std.build.Step) anyerror!void {
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if (step.cast(InstallArtifactStep)) |install_exe| {
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for (install_exe.artifact.packages.items) |pkg| {
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try processPackage(stdout_stream, pkg);
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}
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} else if (step.cast(LibExeObjStep)) |exe| {
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for (exe.packages.items) |pkg| {
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try processPackage(stdout_stream, pkg);
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}
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} else {
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for (step.dependencies.items) |unknown_step| {
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try processStep(stdout_stream, unknown_step);
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}
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}
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}
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fn processPackage(out_stream: anytype, pkg: Pkg) anyerror!void {
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switch (pkg.path) {
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.path => |path| try out_stream.print("{s}\x00{s}\n", .{ pkg.name, path }),
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.generated => |generated| if (generated.path != null) try out_stream.print("{s}\x00{s}\n", .{ pkg.name, generated.path.? }),
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}
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if (pkg.dependencies) |dependencies| {
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for (dependencies) |dep| {
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try processPackage(out_stream, dep);
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}
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}
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}
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fn runBuild(builder: *Builder) anyerror!void {
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switch (@typeInfo(@typeInfo(@TypeOf(root.build)).Fn.return_type.?)) {
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.Void => root.build(builder),
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.ErrorUnion => try root.build(builder),
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else => @compileError("expected return type of build to be 'void' or '!void'"),
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}
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}
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