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Meta: Add gn build rules for LibWeb

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Andrew Kaster 2023-05-05 13:05:39 -06:00 committed by Andrew Kaster
parent 7b3d0fb002
commit 85c8cd5205
60 changed files with 1966 additions and 0 deletions

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#
# This file introduces templates for generating JS bindings for Web Platform
# Objects using IDL files.
#
# The public generate_idl_bindings template invokes the binding generator
# for each IDL file in the input idl_list. It creates two source_set targets
# for the input target_name, one ending in "_generated" and one ending in
# "_sources". The "_generated" target is simply the code generator invocation,
# while the "_sources" target is the actual generated C++ sources files.
#
#
# Parameters:
# idl_list (required) [string]
# List of IDL files that are all the same type.
# Expected to be an absolute path.
#
# type (required) string
# "global", "iterable", "namespace", or "standard"
#
# Example use:
#
# standard_idl_files = get_path_info(
# [
# "//Library/Foo.idl",
# "//Bar.idl"
# ],
# "abspath")
#
# generate_idl_bindings("standard_idl_bindings") {
# idl_list = standard_idl_files
# type = "standard"
# }
#
# shared_library("Library") {
# deps = [
# ":standard_idl_bindings_generated"
# ":standard_idl_bindings_sources"
# ]
# }
#
import("//Meta/gn/build/compiled_action.gni")
# FIXME: rewrite these in terms of action_foreach
template("_invoke_bindings_generator") {
# FIXME: Can we update the bindings generator to output the .h and .cpp at the same time?
assert(defined(invoker.type), "$target_name must have 'type' defined")
# FIXME: This is pretty gross. Can we make the source file name match the command line argument to the generator more closely?
# GN can't (and probably shouldn't) siwzzle our strings for us in this way automagically
assert(defined(invoker.type_filename_fragment),
"$target_name must have 'type_filename_fragment' defined")
assert(defined(invoker.name), "$target_name must have 'name' defined")
assert(defined(invoker.path), "$target_name must have 'path' defined")
forward_variables_from(invoker,
[
"configs",
"include_dirs",
"public_configs",
"testonly",
"visibility",
])
if (!defined(include_dirs)) {
include_dirs = [ "//Userland/Libraries" ]
}
rel_include_dirs = []
foreach(d, include_dirs) {
rel_include_dirs += [
"-i",
rebase_path(d, root_build_dir),
]
}
name_and_type = string_replace(invoker.name + "_" + invoker.type, "-", "_")
type = invoker.type
gen_dir = get_label_info("//Userland/Libraries/LibWeb", "target_gen_dir")
out_name = get_path_info(invoker.path, "name")
compiled_action(name_and_type + "_impl") {
tool = "//Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator"
inputs = [ invoker.path + ".idl" ]
outputs = [ gen_dir + "/Bindings/" + out_name +
invoker.type_filename_fragment + ".cpp" ]
depfile = outputs[0] + ".d"
args = [
"--$type-implementation",
"-o",
rebase_path(outputs[0], root_build_dir),
"--depfile",
rebase_path(depfile, root_build_dir),
"--depfile-target",
rebase_path(outputs[0], root_build_dir),
] + rel_include_dirs +
[
rebase_path(inputs[0], root_build_dir),
# FIXME: Get caller path from invoker?
rebase_path("//Userland/Libraries/LibWeb", root_build_dir),
]
}
compiled_action(name_and_type + "_header") {
tool = "//Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator"
inputs = [ invoker.path + ".idl" ]
outputs = [ gen_dir + "/Bindings/" + out_name +
invoker.type_filename_fragment + ".h" ]
depfile = outputs[0] + ".d"
args = [
"--$type-header",
"-o",
rebase_path(outputs[0], root_build_dir),
"--depfile",
rebase_path(depfile, root_build_dir),
"--depfile-target",
rebase_path(outputs[0], root_build_dir),
] + rel_include_dirs +
[
rebase_path(inputs[0], root_build_dir),
# FIXME: Get caller path from invoker?
rebase_path("//Userland/Libraries/LibWeb", root_build_dir),
]
}
source_set("generate_" + name_and_type) {
deps = [
":" + name_and_type + "_impl",
":" + name_and_type + "_header",
]
}
source_set(name_and_type + "_sources") {
deps = [
":" + name_and_type + "_impl",
":" + name_and_type + "_header",
]
sources = get_target_outputs(deps[0]) + get_target_outputs(deps[1])
configs += [ "//Userland/Libraries/LibWeb:configs" ]
deps += [ "//Userland/Libraries/LibWeb:all_generated" ]
}
}
# FIXME: Deduplicate these templates
template("_bind_web_namespace") {
forward_variables_from(invoker,
[
"configs",
"inputs",
"include_dirs",
"outputs",
"public_configs",
"testonly",
"visibility",
])
interface_name = target_name
_invoke_bindings_generator(interface_name) {
type = "namespace"
type_filename_fragment = "Namespace"
name = interface_name
path = invoker.path
}
source_set(interface_name + "_sources") {
deps = [ ":" + interface_name + "_namespace_sources" ]
}
source_set("generate_" + interface_name) {
deps = [ ":generate_" + interface_name + "_namespace" ]
}
}
# FIXME: Deduplicate these templates
template("_bind_web_iterable_interface") {
forward_variables_from(invoker,
[
"configs",
"inputs",
"include_dirs",
"outputs",
"public_configs",
"testonly",
"visibility",
])
interface_name = target_name
_invoke_bindings_generator(interface_name) {
type = "prototype"
type_filename_fragment = "Prototype"
name = interface_name
path = invoker.path
}
_invoke_bindings_generator(interface_name) {
type = "constructor"
type_filename_fragment = "Constructor"
name = interface_name
path = invoker.path
}
_invoke_bindings_generator(interface_name) {
type = "iterator-prototype"
type_filename_fragment = "IteratorPrototype"
name = interface_name
path = invoker.path
}
source_set(interface_name + "_sources") {
deps = [
":" + interface_name + "_prototype_sources",
":" + interface_name + "_constructor_sources",
":" + interface_name + "_iterator_prototype_sources",
]
}
source_set("generate_" + interface_name) {
deps = [
":generate_" + interface_name + "_prototype",
":generate_" + interface_name + "_constructor",
":generate_" + interface_name + "_iterator_prototype",
]
}
}
# FIXME: Deduplicate these templates
template("_bind_web_global_interface") {
forward_variables_from(invoker,
[
"configs",
"inputs",
"include_dirs",
"outputs",
"public_configs",
"testonly",
"visibility",
])
interface_name = target_name
_invoke_bindings_generator(interface_name) {
type = "prototype"
type_filename_fragment = "Prototype"
name = interface_name
path = invoker.path
}
_invoke_bindings_generator(interface_name) {
type = "constructor"
type_filename_fragment = "Constructor"
name = interface_name
path = invoker.path
}
_invoke_bindings_generator(interface_name) {
type = "global-mixin"
type_filename_fragment = "GlobalMixin"
name = interface_name
path = invoker.path
}
source_set(interface_name + "_sources") {
deps = [
":" + interface_name + "_prototype_sources",
":" + interface_name + "_constructor_sources",
":" + interface_name + "_global_mixin_sources",
]
}
source_set("generate_" + interface_name) {
deps = [
":generate_" + interface_name + "_prototype",
":generate_" + interface_name + "_constructor",
":generate_" + interface_name + "_global_mixin",
]
}
}
# FIXME: Deduplicate these templates
template("_bind_web_interface") {
forward_variables_from(invoker,
[
"configs",
"inputs",
"include_dirs",
"outputs",
"public_configs",
"testonly",
"visibility",
])
interface_name = target_name
_invoke_bindings_generator(interface_name) {
type = "prototype"
type_filename_fragment = "Prototype"
name = interface_name
path = invoker.path
}
_invoke_bindings_generator(interface_name) {
type = "constructor"
type_filename_fragment = "Constructor"
name = interface_name
path = invoker.path
}
source_set(interface_name + "_sources") {
deps = [
":" + interface_name + "_prototype_sources",
":" + interface_name + "_constructor_sources",
]
}
source_set("generate_" + interface_name) {
deps = [
":generate_" + interface_name + "_prototype",
":generate_" + interface_name + "_constructor",
]
}
}
template("generate_idl_bindings") {
forward_variables_from(invoker,
[
"type",
"idl_list",
])
idl_sources = []
generate_idl = []
foreach(idl, idl_list) {
path = get_path_info(rebase_path(idl, "//Userland/Libraries/LibWeb"),
"dir") + "/" + get_path_info(idl, "name")
name = string_replace(path, "/", "_")
if (type == "standard") {
_bind_web_interface(name) {
path = path
}
} else if (type == "iterable") {
_bind_web_iterable_interface(name) {
path = path
}
} else if (type == "namespace") {
_bind_web_namespace(name) {
path = path
}
} else {
assert(type == "global")
_bind_web_global_interface(name) {
path = path
}
}
generate_idl += [ ":generate_" + name ]
idl_sources += [ ":" + name + "_sources" ]
}
source_set(target_name + "_generated") {
deps = generate_idl
}
source_set(target_name + "_sources") {
deps = idl_sources
}
}