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