zig build system changes (modules) (#976)

build.zig

@@ -7,7 +7,7 @@ const zls_version = std.builtin.Version{ .major = 0, .minor = 11, .patch = 0 };
 pub fn build(b: *std.build.Builder) !void {
     comptime {
         const current_zig = builtin.zig_version;
-        const min_zig = std.SemanticVersion.parse("0.11.0-dev.1567+60935decd") catch return; // std.zig.parse(alloc, src) -> std.zig.Ast.parse(alloc, src, Ast.Mode)
+        const min_zig = std.SemanticVersion.parse("0.11.0-dev.1570+693b12f8e") catch return; // addPackage -> addModule
         if (current_zig.order(min_zig) == .lt) {
             @compileError(std.fmt.comptimePrint("Your Zig version v{} does not meet the minimum build requirement of v{}", .{ current_zig, min_zig }));
         }
@@ -112,17 +112,13 @@ pub fn build(b: *std.build.Builder) !void {
 
     const KNOWN_FOLDERS_DEFAULT_PATH = "src/known-folders/known-folders.zig";
     const known_folders_path = b.option([]const u8, "known-folders", "Path to known-folders package (default: " ++ KNOWN_FOLDERS_DEFAULT_PATH ++ ")") orelse KNOWN_FOLDERS_DEFAULT_PATH;
-    exe.addPackage(.{
-        .name = "known-folders",
-        .source = .{ .path = known_folders_path },
-    });
+    const known_folders_module = b.createModule(.{ .source_file = .{ .path = known_folders_path } });
+    exe.addModule("known-folders", known_folders_module);
 
     const TRES_DEFAULT_PATH = "src/tres/tres.zig";
     const tres_path = b.option([]const u8, "tres", "Path to tres package (default: " ++ TRES_DEFAULT_PATH ++ ")") orelse TRES_DEFAULT_PATH;
-    exe.addPackage(.{
-        .name = "tres",
-        .source = .{ .path = tres_path },
-    });
+    const tres_module = b.createModule(.{ .source_file = .{ .path = tres_path } });
+    exe.addModule("tres", tres_module);
 
     const check_submodules_step = CheckSubmodulesStep.init(b, &.{
         known_folders_path,
@@ -156,10 +152,7 @@ pub fn build(b: *std.build.Builder) !void {
         .name = "zls_gen",
         .root_source_file = .{ .path = "src/config_gen/config_gen.zig" },
     });
-    gen_exe.addPackage(.{
-        .name = "tres",
-        .source = .{ .path = tres_path },
-    });
+    gen_exe.addModule("tres", tres_module);
 
     const gen_cmd = gen_exe.run();
     gen_cmd.addArgs(&.{
@@ -201,15 +194,19 @@ pub fn build(b: *std.build.Builder) !void {
         });
     }
 
-    tests.addPackage(.{
-        .name = "zls",
-        .source = .{ .path = "src/zls.zig" },
-        .dependencies = exe.packages.items,
-    });
-    tests.addPackage(.{
-        .name = "tres",
-        .source = .{ .path = tres_path },
+    const build_options_module = exe_options.createModule();
+
+    const zls_module = b.createModule(.{
+        .source_file = .{ .path = "src/zls.zig" },
+        .dependencies = &.{
+            .{ .name = "known-folders", .module = known_folders_module },
+            .{ .name = "tres", .module = tres_module },
+            .{ .name = "build_options", .module = build_options_module },
+        },
     });
+    tests.addModule("zls", zls_module);
+    tests.addModule("tres", tres_module);
+
     test_step.dependOn(&tests.step);
 }
 

src/special/build_runner.zig

@@ -164,8 +164,15 @@ fn processStep(
 
         try processIncludeDirs(allocator, include_dirs, install_exe.artifact.include_dirs.items);
         try processPkgConfig(allocator, include_dirs, install_exe.artifact);
-        for (install_exe.artifact.packages.items) |pkg| {
-            try processPackage(allocator, packages, pkg);
+        if (@hasField(LibExeObjStep, "modules")) {
+            var modules_it = install_exe.artifact.modules.iterator();
+            while (modules_it.next()) |module_entry| {
+                try processModule(allocator, packages, module_entry);
+            }
+        } else { // assuming @hasField(LibExeObjStep, "packages")
+            for (install_exe.artifact.packages.items) |pkg| {
+                try processPackage(allocator, packages, pkg);
+            }
         }
     } else if (step.cast(LibExeObjStep)) |exe| {
         if (exe.root_src) |src| {
@@ -177,8 +184,15 @@ fn processStep(
         }
         try processIncludeDirs(allocator, include_dirs, exe.include_dirs.items);
         try processPkgConfig(allocator, include_dirs, exe);
-        for (exe.packages.items) |pkg| {
-            try processPackage(allocator, packages, pkg);
+        if (@hasField(LibExeObjStep, "modules")) {
+            var modules_it = exe.modules.iterator();
+            while (modules_it.next()) |module_entry| {
+                try processModule(allocator, packages, module_entry);
+            }
+        } else { // assuming @hasField(LibExeObjStep, "packages")
+            for (exe.packages.items) |pkg| {
+                try processPackage(allocator, packages, pkg);
+            }
         }
     } else {
         for (step.dependencies.items) |unknown_step| {
@@ -187,6 +201,30 @@ fn processStep(
     }
 }
 
+fn processModule(
+    allocator: std.mem.Allocator,
+    packages: *std.ArrayListUnmanaged(BuildConfig.Pkg),
+    module: std.StringArrayHashMap(*std.Build.Module).Entry,
+) !void {
+    for (packages.items) |package| {
+        if (std.mem.eql(u8, package.name, module.key_ptr.*)) return;
+    }
+
+    const maybe_path = switch (module.value_ptr.*.source_file) {
+        .path => |path| path,
+        .generated => |generated| generated.path,
+    };
+
+    if (maybe_path) |path| {
+        try packages.append(allocator, .{ .name = module.key_ptr.*, .path = path });
+    }
+
+    var deps_it = module.value_ptr.*.dependencies.iterator();
+    while (deps_it.next()) |module_dep| {
+        try processModule(allocator, packages, module_dep);
+    }
+}
+
 fn processPackage(
     allocator: std.mem.Allocator,
     packages: *std.ArrayListUnmanaged(BuildConfig.Pkg),