# Copyright 2015 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/apple/apple_info_plist.gni")
import("//build/config/apple/symbols.gni")
import("//build/config/mac/mac_sdk.gni")

# Generates Info.plist files for Mac apps and frameworks.
#
# Arguments
#
#     info_plist:
#         (optional) string, path to the Info.plist file that will be used for
#         the bundle.
#
#     info_plist_target:
#         (optional) string, if the info_plist is generated from an action,
#         rather than a regular source file, specify the target name in lieu
#         of info_plist. The two arguments are mutually exclusive.
#
#     executable_name:
#         string, name of the generated target used for the product
#         and executable name as specified in the output Info.plist.
#
#     extra_substitutions:
#         (optional) string array, 'key=value' pairs for extra fields which are
#         specified in a source Info.plist template.
template("mac_info_plist") {
  assert(defined(invoker.info_plist) != defined(invoker.info_plist_target),
         "Only one of info_plist or info_plist_target may be specified in " +
             target_name)

  if (defined(invoker.info_plist)) {
    _info_plist = invoker.info_plist
  } else {
    _info_plist_target_output = get_target_outputs(invoker.info_plist_target)
    _info_plist = _info_plist_target_output[0]
  }

  apple_info_plist(target_name) {
    format = "xml1"
    extra_substitutions = [
      "MAC_SDK_BUILD=$mac_sdk_build_version",
      "MAC_SDK_NAME=$mac_sdk_name$mac_sdk_version",
      "MACOSX_DEPLOYMENT_TARGET=$mac_deployment_target",
      "CHROMIUM_MIN_SYSTEM_VERSION=$mac_min_system_version",
      "XCODE_BUILD=$xcode_build",
      "XCODE_VERSION=$xcode_version",
    ]
    if (defined(invoker.extra_substitutions)) {
      extra_substitutions += invoker.extra_substitutions
    }
    plist_templates = [
      "//build/config/mac/BuildInfo.plist",
      _info_plist,
    ]
    if (defined(invoker.info_plist_target)) {
      deps = [ invoker.info_plist_target ]
    }
    forward_variables_from(invoker,
                           [
                             "testonly",
                             "executable_name",
                           ])
  }
}

# Template to package a shared library into a Mac framework bundle.
#
# By default, the bundle target this template generates does not link the
# resulting framework into anything that depends on it. If a dependency wants
# a link-time (as well as build-time) dependency on the framework bundle,
# depend against "$target_name+link". If only the build-time dependency is
# required (e.g., for copying into another bundle), then use "$target_name".
#
# Arguments
#
#     framework_version:
#         string, version of the framework. Typically this is a
#         single letter, like "A".
#
#     framework_contents:
#         list of string, top-level items in the framework. This is
#         the list of symlinks to create in the .framework directory that link
#         into Versions/Current/.
#
#     info_plist:
#         (optional) string, path to the Info.plist file that will be used for
#         the bundle.
#
#     info_plist_target:
#         (optional) string, if the info_plist is generated from an action,
#         rather than a regular source file, specify the target name in lieu
#         of info_plist. The two arguments are mutually exclusive.
#
#     output_name:
#         (optional) string, name of the generated framework without the
#         .framework suffix. If omitted, defaults to target_name.
#
#     extra_substitutions:
#         (optional) string array, 'key=value' pairs for extra fields which are
#         specified in a source Info.plist template.
#
# This template provides three targets for the resulting framework bundle. The
# link-time behavior varies depending on which of the two targets below is
# added as a dependency:
#   - $target_name only adds a build-time dependency. Targets that depend on
#     it will not link against the framework.
#   - $target_name+link adds a build-time and link-time dependency. Targets
#     that depend on it will link against the framework.
#   - $target_name+link_nested adds a build-time and link-time dependency, but
#     only on the shared library and not the fully-assembled framework bundle.
#     This should only be used for other nested binary components of the
#     framework bundle (e.g. Helpers) that themselves depend on the main shared
#     library of the framework bundle.
#
# The build-time-only dependency is used for when a target needs to use the
# framework either only for resources, or because the target loads it at run-
# time, via dlopen() or NSBundle. The link-time dependency will cause the
# dependee to have the framework loaded by dyld at launch.
#
# Example of build-time only dependency:
#
#     mac_framework_bundle("CoreTeleportation") {
#       sources = [ ... ]
#     }
#
#     bundle_data("core_teleportation_bundle_data") {
#       deps = [ ":CoreTeleportation" ]
#       sources = [ "$root_out_dir/CoreTeleportation.framework" ]
#       outputs = [ "{{bundle_contents_dir}}/Frameworks/{{source_file_part}}" ]
#     }
#
#     app_bundle("GoatTeleporter") {
#       sources = [ ... ]
#       deps = [
#         ":core_teleportation_bundle_data",
#       ]
#     }
#
# The GoatTeleporter.app will not directly link against
# CoreTeleportation.framework, but it will be included in the bundle's
# Frameworks directory.
#
# Example of link-time dependency:
#
#     mac_framework_bundle("CoreTeleportation") {
#       sources = [ ... ]
#       ldflags = [
#         "-install_name",
#         "@executable_path/../Frameworks/$target_name.framework"
#       ]
#     }
#
#     bundle_data("core_teleportation_bundle_data") {
#       deps = [ ":CoreTeleportation+link" ]
#       sources = [ "$root_out_dir/CoreTeleportation.framework" ]
#       outputs = [ "{{bundle_contents_dir}}/Frameworks/{{source_file_part}}" ]
#     }
#
#     app_bundle("GoatTeleporter") {
#       sources = [ ... ]
#       deps = [
#         ":core_teleportation_bundle_data",
#       ]
#     }
#
# Note that the framework is still copied to the app's bundle, but dyld will
# load this library when the app is launched because it uses the "+link"
# target as a dependency. This also requires that the framework set its
# install_name so that dyld can locate it.
#
# See "gn help shared_library" for more information on arguments supported
# by shared library target.
template("mac_framework_bundle") {
  assert(defined(invoker.deps) || defined(invoker.public_deps),
         "Dependencies must be specified for $target_name")
  assert(invoker.framework_version != "", "framework_version is required")
  assert(defined(invoker.framework_contents), "framework_contents is required")

  _info_plist_target = target_name + "_info_plist"

  mac_info_plist(_info_plist_target) {
    executable_name = target_name
    if (defined(invoker.output_name)) {
      executable_name = invoker.output_name
    }
    forward_variables_from(invoker,
                           [
                             "extra_substitutions",
                             "info_plist",
                             "info_plist_target",
                             "testonly",
                           ])
  }

  _info_plist_bundle_data = _info_plist_target + "_bundle_data"

  bundle_data(_info_plist_bundle_data) {
    forward_variables_from(invoker, [ "testonly" ])
    sources = get_target_outputs(":$_info_plist_target")
    outputs = [ "{{bundle_resources_dir}}/Info.plist" ]
    public_deps = [ ":$_info_plist_target" ]
  }

  _target_name = target_name
  _output_name = target_name
  if (defined(invoker.output_name)) {
    _output_name = invoker.output_name
  }

  # Create a file to track the build dependency on the framework_version and
  # framework_contents variables.
  _framework_toc = [
                     "Version=" + invoker.framework_version,
                     _output_name,
                   ] + invoker.framework_contents
  _framework_contents = [ _output_name ] + invoker.framework_contents
  _framework_toc_file = "$target_out_dir/${target_name}.toc"
  write_file(_framework_toc_file, _framework_toc)

  # Create local variables for referencing different parts of the bundle.
  _framework_target = _target_name
  _framework_name = _output_name + ".framework"
  _framework_base_dir = "$root_out_dir/$_framework_name"
  _framework_root_dir =
      _framework_base_dir + "/Versions/${invoker.framework_version}"

  # Clean the entire framework if the framework_version changes.
  _version_file = "$target_out_dir/${target_name}_version"
  exec_script("//build/config/mac/prepare_framework_version.py",
              [
                rebase_path(_version_file),
                rebase_path(_framework_base_dir),
                invoker.framework_version,
              ])

  # Create the symlinks.
  _framework_package_target = target_name + "_package"
  action(_framework_package_target) {
    script = "//build/config/mac/package_framework.py"

    # The TOC file never needs to be read, since its contents are the values
    # of GN variables. It is only used to trigger this rule when the values
    # change.
    inputs = [ _framework_toc_file ]

    _stamp_file = "$target_out_dir/run_${_framework_package_target}.stamp"
    outputs = [ _stamp_file ]

    visibility = [ ":$_framework_target" ]

    args = [
             "--framework",
             rebase_path(_framework_base_dir, root_build_dir),
             "--stamp",
             rebase_path(_stamp_file, root_build_dir),
             "--version",
             invoker.framework_version,
             "--contents",
           ] + _framework_contents

    # It is not possible to list _framework_contents as outputs, since
    # ninja does not properly stat symbolic links.
    # https://github.com/ninja-build/ninja/issues/1186
  }

  _link_shared_library_target = target_name + "_shared_library"
  _shared_library_bundle_data = target_name + "_shared_library_bundle_data"

  shared_library(_link_shared_library_target) {
    forward_variables_from(invoker,
                           "*",
                           [
                             "assert_no_deps",
                             "bundle_deps",
                             "code_signing_enabled",
                             "data_deps",
                             "info_plist",
                             "info_plist_target",
                             "output_name",
                             "visibility",
                           ])
    visibility = [
      ":$_shared_library_bundle_data",
      ":${_framework_target}+link_nested",
    ]
    output_name = _output_name
    output_prefix_override = true
    output_extension = ""
    output_dir = "$target_out_dir/$_link_shared_library_target"
  }

  bundle_data(_shared_library_bundle_data) {
    visibility = [ ":$_framework_target" ]
    forward_variables_from(invoker, [ "testonly" ])
    sources = [ "$target_out_dir/$_link_shared_library_target/$_output_name" ]
    outputs = [ "{{bundle_executable_dir}}/$_output_name" ]
    public_deps = [ ":$_link_shared_library_target" ]
  }

  _framework_public_config = _target_name + "_public_config"
  config(_framework_public_config) {
    visibility = [ ":$_framework_target+link" ]
    framework_dirs = [ root_out_dir ]
    frameworks = [ _framework_name ]
  }

  create_bundle(_framework_target) {
    forward_variables_from(invoker,
                           [
                             "data_deps",
                             "deps",
                             "public_deps",
                             "testonly",
                           ])

    if (defined(invoker.visibility)) {
      visibility = invoker.visibility
      visibility += [ ":$_target_name+link" ]
    }

    if (!defined(deps)) {
      deps = []
    }
    deps += [ ":$_info_plist_bundle_data" ]

    if (defined(invoker.bundle_deps)) {
      deps += invoker.bundle_deps
    }

    if (!defined(public_deps)) {
      public_deps = []
    }
    public_deps += [
      ":$_framework_package_target",
      ":$_shared_library_bundle_data",
    ]

    if (enable_dsyms) {
      data = [
        "$root_out_dir/$_output_name.dSYM/Contents/Info.plist",
        "$root_out_dir/$_output_name.dSYM/Contents/Resources/DWARF/$_output_name",
      ]
    }

    bundle_root_dir = _framework_base_dir
    bundle_contents_dir = _framework_root_dir
    bundle_resources_dir = "$bundle_contents_dir/Resources"
    bundle_executable_dir = bundle_contents_dir
  }

  group(_target_name + "+link") {
    forward_variables_from(invoker,
                           [
                             "public_configs",
                             "testonly",
                             "visibility",
                           ])
    public_deps = [ ":$_target_name" ]
    if (!defined(public_configs)) {
      public_configs = []
    }
    public_configs += [ ":$_framework_public_config" ]
  }

  group(_target_name + "+link_nested") {
    forward_variables_from(invoker,
                           [
                             "public_configs",
                             "testonly",
                             "visibility",
                           ])

    # Depend only on the shared library. Nested code will be a dependency of
    # the create_bundle target, which would be cyclic with depending on the
    # framework itself. This is sufficient to link; for loading, a proper
    # install_name should be set.
    public_deps = [ ":$_link_shared_library_target" ]
  }
}

set_defaults("mac_framework_bundle") {
  configs = default_shared_library_configs
}

# Template to create a Mac executable application bundle.
#
# Arguments
#
#     package_type:
#         (optional) string, the product package type to create. Options are:
#             "app" to create a .app bundle (default)
#             "xpc" to create an .xpc service bundle
#
#     info_plist:
#         (optional) string, path to the Info.plist file that will be used for
#         the bundle.
#
#     info_plist_target:
#         (optional) string, if the info_plist is generated from an action,
#         rather than a regular source file, specify the target name in lieu
#         of info_plist. The two arguments are mutually exclusive.
#
#     output_name:
#         (optional) string, name of the generated app without the
#         .app suffix. If omitted, defaults to target_name.
#
#     extra_substitutions:
#         (optional) string array, 'key=value' pairs for extra fields which are
#         specified in a source Info.plist template.
template("mac_app_bundle") {
  _target_name = target_name
  _output_name = target_name
  if (defined(invoker.output_name)) {
    _output_name = invoker.output_name
  }

  _package_type = "app"
  if (defined(invoker.package_type)) {
    _package_type = invoker.package_type
  }

  if (_package_type == "app") {
    _output_extension = "app"
    _product_type = "com.apple.product-type.application"
    _write_pkg_info = true
  } else if (_package_type == "xpc") {
    _output_extension = "xpc"
    _product_type = "com.apple.product-type.xpc-service"
    _write_pkg_info = false
  } else if (_package_type == "bundle") {
    _output_extension = "bundle"
    _product_type = "com.apple.product-type.bundle"
    _write_pkg_info = false
  } else {
    assert(false, "Unsupported packge_type: " + packge_type)
  }

  _executable_target = target_name + "_executable"
  _executable_bundle_data = _executable_target + "_bundle_data"

  _info_plist_target = target_name + "_info_plist"

  mac_info_plist(_info_plist_target) {
    executable_name = _output_name
    forward_variables_from(invoker,
                           [
                             "extra_substitutions",
                             "info_plist",
                             "info_plist_target",
                             "testonly",
                           ])
  }

  if (_write_pkg_info) {
    _pkg_info_target = target_name + "_pkg_info"

    action(_pkg_info_target) {
      forward_variables_from(invoker, [ "testonly" ])
      script = "//build/apple/write_pkg_info.py"
      inputs = [ "//build/apple/plist_util.py" ]
      sources = get_target_outputs(":$_info_plist_target")
      outputs = [ "$target_gen_dir/$_pkg_info_target" ]
      args = [ "--plist" ] + rebase_path(sources, root_build_dir) +
             [ "--output" ] + rebase_path(outputs, root_build_dir)
      deps = [ ":$_info_plist_target" ]
    }
  }

  executable(_executable_target) {
    visibility = [ ":$_executable_bundle_data" ]
    forward_variables_from(invoker,
                           "*",
                           [
                             "assert_no_deps",
                             "data_deps",
                             "info_plist",
                             "output_name",
                             "visibility",
                           ])
    output_name = _output_name
    output_dir = "$target_out_dir/$_executable_target"
  }

  bundle_data(_executable_bundle_data) {
    visibility = [ ":$_target_name" ]
    forward_variables_from(invoker, [ "testonly" ])
    sources = [ "$target_out_dir/$_executable_target/$_output_name" ]
    outputs = [ "{{bundle_executable_dir}}/$_output_name" ]
    public_deps = [ ":$_executable_target" ]
  }

  _info_plist_bundle_data = _info_plist_target + "_bundle_data"

  bundle_data(_info_plist_bundle_data) {
    forward_variables_from(invoker, [ "testonly" ])
    visibility = [ ":$_target_name" ]
    sources = get_target_outputs(":$_info_plist_target")
    outputs = [ "{{bundle_contents_dir}}/Info.plist" ]
    public_deps = [ ":$_info_plist_target" ]
  }

  if (_write_pkg_info) {
    _pkg_info_bundle_data = _pkg_info_target + "_bundle_data"

    bundle_data(_pkg_info_bundle_data) {
      forward_variables_from(invoker, [ "testonly" ])
      visibility = [ ":$_target_name" ]
      sources = get_target_outputs(":$_pkg_info_target")
      outputs = [ "{{bundle_contents_dir}}/PkgInfo" ]
      public_deps = [ ":$_pkg_info_target" ]
    }
  }

  create_bundle(_target_name) {
    forward_variables_from(invoker,
                           [
                             "data_deps",
                             "deps",
                             "public_deps",
                             "testonly",
                           ])
    if (!defined(deps)) {
      deps = []
    }
    deps += [
      ":$_executable_bundle_data",
      ":$_info_plist_bundle_data",
    ]
    if (_write_pkg_info) {
      deps += [ ":$_pkg_info_bundle_data" ]
    }

    if (enable_dsyms) {
      data = [
        "$root_out_dir/$_output_name.dSYM/Contents/Info.plist",
        "$root_out_dir/$_output_name.dSYM/Contents/Resources/DWARF/$_output_name",
      ]
    }

    product_type = _product_type
    bundle_root_dir = "$root_out_dir/${_output_name}.${_output_extension}"
    bundle_contents_dir = "$bundle_root_dir/Contents"
    bundle_resources_dir = "$bundle_contents_dir/Resources"
    bundle_executable_dir = "$bundle_contents_dir/MacOS"
  }
}

set_defaults("mac_app_bundle") {
  configs = default_executable_configs
}

# Template to package a loadable_module into a .plugin bundle.
#
# This takes no extra arguments that differ from a loadable_module.
template("mac_plugin_bundle") {
  assert(defined(invoker.deps),
         "Dependencies must be specified for $target_name")

  _target_name = target_name
  _loadable_module_target = _target_name + "_loadable_module"
  _loadable_module_bundle_data = _loadable_module_target + "_bundle_data"

  _output_name = _target_name
  if (defined(invoker.output_name)) {
    _output_name = invoker.output_name
  }

  loadable_module(_loadable_module_target) {
    visibility = [ ":$_loadable_module_bundle_data" ]
    forward_variables_from(invoker,
                           "*",
                           [
                             "assert_no_deps",
                             "data_deps",
                             "output_name",
                             "visibility",
                           ])
    output_dir = "$target_out_dir"
    output_name = _output_name
  }

  bundle_data(_loadable_module_bundle_data) {
    forward_variables_from(invoker, [ "testonly" ])
    visibility = [ ":$_target_name" ]
    sources = [ "$target_out_dir/$_output_name.so" ]
    outputs = [ "{{bundle_executable_dir}}/$_output_name" ]
    public_deps = [ ":$_loadable_module_target" ]
  }

  create_bundle(_target_name) {
    forward_variables_from(invoker,
                           [
                             "data_deps",
                             "deps",
                             "public_deps",
                             "testonly",
                             "visibility",
                           ])
    if (!defined(deps)) {
      deps = []
    }
    deps += [ ":$_loadable_module_bundle_data" ]

    if (enable_dsyms) {
      data = [
        "$root_out_dir/$_output_name.so.dSYM/Contents/Info.plist",
        "$root_out_dir/$_output_name.so.dSYM/Contents/Resources/DWARF/$_output_name.so",
      ]
    }

    bundle_root_dir = "$root_out_dir/$_output_name.plugin"
    bundle_contents_dir = "$bundle_root_dir/Contents"
    bundle_executable_dir = "$bundle_contents_dir/MacOS"
  }
}