# Copyright 2018 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/compiled_action.gni")
import("//build/config.gni")
import("//build/config/clang/clang.gni")
import("//build/config/fuchsia/zbi.gni")
import("//build/config/fuchsia/zircon.gni")
import("//build/gn/packages.gni")
import("//build/images/boot.gni")
import("//build/images/collect_blob_manifest.gni")
import("//build/images/custom_signing.gni")
import("//build/images/fvm.gni")
import("//build/images/json.gni")
import("//build/images/manifest.gni")
import("//build/images/max_fvm_size.gni")
import("//build/images/shell_commands.gni")
import("//build/images/zxcrypt.gni")
import("//build/package.gni")
import("//build/sdk/sdk_atom.gni")
import("//build/sdk/sdk_molecule.gni")
import("//garnet/build/pkgfs.gni")
import("//garnet/go/src/pm/pm.gni")

declare_args() {
  # Path to manifest file containing data to place into the initial /data
  # partition.
  data_partition_manifest = ""

  # Whether to build the netboot zbi by default.
  #
  # You can still build //build/images:netboot explicitly even if enable_netboot is false.
  enable_netboot = false

  # A list of labels for meta packages to be included in the monolith.
  meta_package_labels = []

  # arguments to fx flash script
  zircon_a_partition = ""
  zircon_b_partition = ""
  zircon_r_partition = ""
  vbmeta_a_partition = ""
  vbmeta_b_partition = ""
  vbmeta_r_partition = ""
  active_partition = ""
  signed_image = false
}

assert(
    meta_package_labels != [],
    "Missing meta_package_labels. Are you using a supported product configuration? " + "Check your args.gn file for an import of a product configuration, and consider " + "using one of the products in the `//products` or `//vendor/*/products` directories.")

assert(custom_signing_script == "" || !use_vboot,
       "custom_signing_script and use_vboot cannot be used together!")

board_name_file = "$root_build_dir/board_name"
write_file(board_name_file, "${board_name}")

# This will collect a list of scopes describing each image exported.
# See json.gni.
images = [
  {
    sources = [
      "$root_build_dir/args.gn",
    ]
    json = {
      name = "buildargs"
      type = "gn"
      archive = true
    }
    deps = []
  },
  {
    sources = [
      "//.jiri_root/update_history/latest",
    ]
    json = {
      name = "jiri_snapshot"
      type = "xml"
      archive = true
    }
    deps = []
  },
  {
    json = {
      name = "bootserver"
      type = "exe.$host_platform"
      archive = true
    }
    sources = [
      "$zircon_tools_dir/bootserver",
    ]
    deps = []
  },
]

group("meta_packages") {
  testonly = true
  visibility = [ ":*" ]
  public_deps = meta_package_labels
}

group("monolith_packages") {
  testonly = true
  visibility = [ ":*" ]
  public_deps = monolith_package_labels + [ "//:additional_base_packages" ]
}

group("preinstall_packages") {
  testonly = true
  visibility = [ ":*" ]
  public_deps = preinstall_package_labels + [ "//:additional_cache_packages" ]
}

group("available_packages") {
  testonly = true
  visibility = [ ":*" ]
  public_deps = available_package_labels + [
                  ":monolith_packages",
                  ":preinstall_packages",
                  "//:additional_universe_packages",
                ]
}

group("packages") {
  testonly = true
  public_deps = [
    ":available_packages",
    ":meta_packages",
  ]

  if (enable_netboot) {
    data_deps = [
      ":netboot",
      ":netboot-script",
    ]
  }
}

template("package_list") {
  generated_file(target_name) {
    testonly = true
    forward_variables_from(invoker,
                           [
                             "deps",
                             "public_deps",
                             "visibility",
                           ])

    data_keys = [ "package_names" ]
    walk_keys = [ "package_barrier" ]
    outputs = [
      "$root_out_dir/$target_name",
    ]
  }
}

package_list("monolith_packages.list") {
  visibility = [ ":*" ]
  deps = [
    ":meta_packages",
    ":monolith_packages",
  ]
}

package_list("preinstall_packages.list") {
  visibility = [ ":*" ]
  deps = [
    ":preinstall_packages",
  ]
}

package_list("available_packages.list") {
  visibility = [ ":*" ]
  deps = [
    ":available_packages",
  ]
}

group("package_lists") {
  testonly = true
  visibility = [ ":*" ]

  deps = [
    ":available_packages.list",
    ":monolith_packages.list",
    ":preinstall_packages.list",
  ]
}

config_package("config-data") {
  testonly = true
  visibility = [ ":*" ]
  deps = [
    ":available_packages",
  ]
}

shell_commands("shell-commands") {
  testonly = true
  visibility = [ ":*" ]
  deps = [
    ":available_packages",
  ]
}

###
### Fuchsia system image.  This aggregates contributions from all the
### package() targets enabled in the build.
###

pm_binary_label = "//garnet/go/src/pm:pm_bin($host_toolchain)"
pm_out_dir = get_label_info(pm_binary_label, "root_out_dir")
pm_binary = "$pm_out_dir/pm"

# This just runs `pm -k $system_package_key genkey` if the file doesn't exist.
# Every package() target depends on this.
action("system_package_key_check") {
  visibility = [ "*" ]
  deps = [
    pm_binary_label,
  ]
  outputs = [
    "$target_out_dir/system_package_key_check_ok.stamp",
  ]
  script = "//build/gn_run_binary.sh"
  inputs = [
    "system_package_key_check.py",
    pm_binary,
  ]
  args =
      [ clang_prefix ] + rebase_path(inputs + outputs + [ system_package_key ])
}

monolith_meta_far_merkle_index =
    "$target_out_dir/monolith_meta_far_merkle_index"
package_metadata_list("monolith_meta_far_merkle_index") {
  testonly = true
  outputs = [
    monolith_meta_far_merkle_index,
  ]
  data_keys = [ "meta_far_merkle_index_entries" ]
  deps = [
    ":meta_packages",
    ":monolith_packages",
  ]
}

# The pkgsvr index is a manifest mapping `package_name/package_version` to
# the merkleroot of the package's meta.far file.
pkgsvr_index = "$target_out_dir/pkgsvr_index"

action("pkgsvr_index") {
  visibility = [
    ":system_image.manifest",
    ":update_packages.manifest",
  ]
  testonly = true
  outputs = [
    "$target_out_dir/$target_name",
  ]
  deps = [
    ":monolith_meta_far_merkle_index",
  ]
  inputs = [
    monolith_meta_far_merkle_index,
  ]

  script = "//build/images/manifest_content_expand.sh"
  args = [
    rebase_path(monolith_meta_far_merkle_index, root_build_dir),
    rebase_path(outputs[0], root_build_dir),
  ]
}

preinstall_meta_far_merkle_index =
    "$target_out_dir/preinstall_meta_far_merkle_index"
package_metadata_list("preinstall_meta_far_merkle_index") {
  testonly = true
  outputs = [
    preinstall_meta_far_merkle_index,
  ]
  data_keys = [ "meta_far_merkle_index_entries" ]
  deps = [
    ":preinstall_packages",
    ":update.meta",
  ]
}

# preinstall.manifest is a manifest of files that are a pkgfs "dynamic index"
# populated inside /pkgfs/packages that are {name}/{version} containing the
# merkleroot of the meta.far of that package.
action("preinstall.manifest") {
  visibility = [ ":data.blk" ]
  testonly = true

  deps = [
    ":preinstall_meta_far_merkle_index",
  ]
  inputs = [
    preinstall_meta_far_merkle_index,
  ]

  script = "manifest_add_dest_prefix.sh"
  args = [ "pkgfs_index/packages/" ]
  outputs = [
    # The output is in the root build dir in order to avoid a complex rewrite
    # of the source path. The minfs tool this is passed to interprets source
    # locations relative to the manifest.
    "$root_build_dir/$target_name",
  ]
  args += [
    rebase_path(preinstall_meta_far_merkle_index, root_build_dir),
    rebase_path(outputs[0], root_build_dir),
  ]
}

# The /boot and /system manifests have to be generated in concert.  Things
# like drivers going into /system can affect what needs to go into /boot.
boot_manifest = "$target_out_dir/boot.manifest"

system_image_manifest_args = "system_image.manifest_args"
system_image_manifest_args_path = target_gen_dir + "/system_image.manifest_args"

generated_file(system_image_manifest_args) {
  testonly = true
  outputs = [
    system_image_manifest_args_path,
  ]
  data_keys = [ "system_image_rsps" ]
  walk_keys = [ "package_barrier" ]
  deps = [
    ":meta_packages",
    ":monolith_packages",
  ]
}

# The system_image "package" manifest is everything that appears in /system.
generate_manifest("system_image.manifest") {
  visibility = [ ":*" ]
  testonly = true

  # Create the /boot manifest that gets packed into BOOTFS in the ZBI.
  # /system manifest files can assume that the /boot files are visible at
  # runtime, so dependencies already in /boot won't be copied into /system.
  bootfs_manifest = boot_manifest
  bootfs_zircon_groups = "all"

  # Collect whatever we want from Zircon that didn't go into /boot.
  zircon_groups = ""

  # Now each package() target in the build contributes manifest entries.
  # For system_image packages, these contain binaries that need their
  # references resolved from the auxiliary manifests or /boot (above).
  deps = [
    ":" + system_image_manifest_args,
  ]
  sources = [
    system_image_manifest_args_path,
  ]
  args = [ "@" + rebase_path(system_image_manifest_args_path, root_build_dir) ]

  args += [ "--entry-manifest=" +
            get_label_info(":$target_name", "label_no_toolchain") ]

  # Add the meta/package JSON file that makes this the "system_image" package.
  json = "system_meta_package.json"
  sources += [ json ]
  args += [ "--entry=meta/package=" + rebase_path(json, root_build_dir) ]

  # Add the static packages (pkgsvr) index.
  deps += [ ":pkgsvr_index" ]
  sources += [ pkgsvr_index ]
  args += [ "--entry=data/static_packages=" +
            rebase_path(pkgsvr_index, root_build_dir) ]
}

system_manifest_outputs = get_target_outputs(":system_image.manifest")
assert(boot_manifest == system_manifest_outputs[2])
system_build_id_map = system_manifest_outputs[1]

# Generate, sign, and seal the system_image package file.
pm_build_package("system_image.meta") {
  package_name = "system_image"
  visibility = [ ":*" ]
  testonly = true
  manifest = ":system_image.manifest"
}

# Now generate the blob manifest.  This lists all the source files
# that need to go into the blobfs image.  That is everything from the
# system_image manifest, everything from each package manifest, and
# all the synthesized meta.far files.
blob_manifest = "$root_build_dir/blob.manifest"

collect_blob_manifest("blob.manifest") {
  testonly = true
  visibility = [ ":*" ]
  outputs = [
    blob_manifest,
  ]
  deps = [
    ":meta_packages",
    ":monolith_packages",
    ":preinstall_packages",
    ":system_image.meta",
    ":update.meta",
    pkgfs_package_label,
  ]
}

# Pack up all the blobs!
zircon_tool_action("blob.blk") {
  visibility = [ ":*" ]
  testonly = true
  deps = [
    ":blob.manifest",
  ]
  blob_image_path = "$target_out_dir/$target_name"
  blob_size_list = "$root_build_dir/blob.sizes"
  outputs = [
    blob_image_path,
    # This should be an output too, but the generate_fvm template assumes that all
    # outputs of these actions are inputs to the fvm tool.
    # blob_size_list
  ]
  depfile = blob_image_path + ".d"
  inputs = [
    blob_manifest,
  ]
  tool = "blobfs"
  args = [
    "--depfile",
    "--sizes",
    rebase_path(blob_size_list, root_build_dir),
    "--compress",
    rebase_path(blob_image_path, root_build_dir),
    "create",
    "--manifest",
    rebase_path(blob_manifest, root_build_dir),
  ]
}
images += [
  {
    deps = [
      ":blob.blk",
    ]
    public = [
      "IMAGE_BLOB_RAW",
    ]
    json = {
      name = "blob"
      type = "blk"
    }
  },
]

###
### Zircon Boot Images
###

declare_args() {
  # List of arguments to add to /boot/config/devmgr.
  # These come after synthesized arguments to configure blobfs and pkgfs.
  devmgr_config = []

  # List of kernel command line arguments to bake into the boot image.
  # See also //zircon/docs/kernel_cmdline.md and
  # [`devmgr_config`](#devmgr_config).
  kernel_cmdline_args = []

  # Files containing additional kernel command line arguments to bake into
  # the boot image.  The contents of these files (in order) come after any
  # arguments directly in [`kernel_cmdline_args`](#kernel_cmdline_args).
  # These can be GN `//` source pathnames or absolute system pathnames.
  kernel_cmdline_files = []

  # List of extra manifest entries for files to add to the BOOTFS.
  # Each entry can be a "TARGET=SOURCE" string, or it can be a scope
  # with `sources` and `outputs` in the style of a copy() target:
  # `outputs[0]` is used as `TARGET` (see `gn help source_expansion`).
  bootfs_extra = []

  # List of kernel images to include in the update (OTA) package.
  # If no list is provided, all built kernels are included. The names in the
  # list are strings that must match the filename to be included in the update
  # package.
  update_kernels = []
}

images += [
  {
    # This is the file to give QEMU's `-kernel` switch with a complete
    # ZBI (some `IMAGE_*_ZBI` file) for its `-initrd` switch.
    public = [
      "IMAGE_QEMU_KERNEL_RAW",
    ]
    json = {
      name = "qemu-kernel"
      type = "kernel"
    }
    sdk = "qemu-kernel.bin"
    deps = []
    foreach(image, zircon_images) {
      if (image.name == "qemu-kernel" && image.cpu == target_cpu) {
        sources = [
          "$zircon_root_build_dir/${image.path}",
        ]
      }
    }
  },
]

# Generate the /boot/config/devmgr file.  This looks like a kernel command
# line file, but is read by devmgr (in addition to kernel command line
# arguments), not by the kernel or boot loader.
action("devmgr_config.txt") {
  visibility = [ ":fuchsia" ]
  testonly = true

  script = "manifest.py"
  outputs = [
    "$target_out_dir/$target_name",
  ]

  pkgfs = "bin/" + pkgfs_binary_name
  pkgfs_label = pkgfs_package_label
  pkgfs_pkg_out_dir = get_label_info(pkgfs_label, "target_out_dir") + "/" +
                      get_label_info(pkgfs_label, "name")
  pkgfs_blob_manifest = "$pkgfs_pkg_out_dir/meta/contents"
  system_image_merkleroot = "$target_out_dir/system_image.meta/meta.far.merkle"

  deps = [
    ":system_image.meta",
    pkgfs_label,
  ]
  sources = [
    pkgfs_blob_manifest,
    system_image_merkleroot,
  ]

  args = [
    "--output=" + rebase_path(outputs[0], root_build_dir),

    # Start with the fixed options.
    "--entry=devmgr.require-system=true",
  ]

  # Add the pkgfs command line, embedding the merkleroot of the system image.
  args += [
    "--contents",
    "--rewrite=*=zircon.system.pkgfs.cmd={target}+{source}",
    "--entry=${pkgfs}=" + rebase_path(system_image_merkleroot, root_build_dir),
    "--no-contents",
    "--reset-rewrite",
  ]

  # Embed the pkgfs blob manifest with the "zircon.system.pkgfs.file."
  # prefix on target file names.
  args += [
    "--rewrite=*=zircon.system.pkgfs.file.{target}={source}",
    "--manifest=" + rebase_path(pkgfs_blob_manifest, root_build_dir),
    "--reset-rewrite",
  ]

  foreach(entry, devmgr_config) {
    args += [ "--entry=$entry" ]
  }

  # If there were any ASan drivers in the build, bin/devhost.asan
  # should have been brought into the boot manifest.  devmgr needs to
  # be told to use it in case there are ASan drivers in /system but
  # none in /boot.  If there were any non-ASan drivers in the build,
  # bin/devhost.asan will load them and needs to know to moderate the
  # checking for interacting with uninstrumented code.
  deps += [ ":system_image.manifest" ]
  sources += [ boot_manifest ]
  args += [
    "--include=bin/devhost.asan",
    "--include=bin/devhost",
    "--rewrite=bin/devhost.asan=devmgr.devhost.asan=true",
    "--rewrite=bin/devhost=devhost.asan.strict=false",
    "--manifest=" + rebase_path(boot_manifest, root_build_dir),
  ]
}

generated_file("zxcrypt_config.txt") {
  outputs = [
    "$target_out_dir/$target_name",
  ]
  contents = zxcrypt_key_source
}

component_manager_label =
    "//garnet/bin/sys/component_manager:component_manager.bootfs"
component_manager_target_dir =
    get_label_info(component_manager_label, "target_out_dir")
component_manager_target_name = get_label_info(component_manager_label, "name")
component_manager_manifest =
    component_manager_target_dir + "/" + component_manager_target_name

# The main bootable image, which requires `blob.blk` to appear on some
# attached storage device at runtime.
zbi("fuchsia") {
  testonly = true

  deps = [
    ":devmgr_config.txt",
    ":system_image.manifest",
    ":zxcrypt_config.txt",
    component_manager_label,
  ]
  inputs = [
    component_manager_manifest,
    boot_manifest,
    zircon_kernel_zbi,
  ]
  manifest = [
    {
      outputs = [
        "config/devmgr",
      ]
      sources = get_target_outputs(":devmgr_config.txt")
    },
    "config/zxcrypt=" +
        rebase_path("$target_out_dir/zxcrypt_config.txt", root_build_dir),
  ]
  cmdline = kernel_cmdline_args
  cmdline_inputs = kernel_cmdline_files
  manifest += bootfs_extra
}
images += [
  {
    deps = [
      ":fuchsia",
    ]
    sdk = "fuchsia.zbi"
    updater = "zbi"
    if (!use_vboot) {
      installer = "fuchsia.zbi"
    }
    json = {
      name = "zircon-a"
      type = "zbi"

      # TODO(IN-892): Although we wish to minimize the usage of mexec (ZX-2069),
      # the infrastructure currently requires it for vim2 lifecycle management.
      # (`fastboot continue` does not continue back to fuchsia after paving and
      # rebooting in the case we do not mexec a kernel.)
      bootserver_pave = [ "--boot" ]

      if (custom_signing_script == "" && !use_vboot) {
        bootserver_pave += [
          "--zircona",
          # TODO(ZX-2625): `dm reboot-recovery` boots from zircon-b instead of
          # zircon-r, so for now zedboot is being paved to this slot.
          # "--zirconb",
        ]
      }
    }
    public = [
      "IMAGE_ZIRCONA_ZBI",

      # TODO(mcgrathr): The complete ZBI can be used with a separate
      # kernel too, the kernel image in it will just be ignored.  So
      # just use the primary ZBI for this until all uses are
      # converted to using the ZBI alone.  Then remove this as
      # IMAGE_BOOT_RAM variable should no longer be in use.
      "IMAGE_BOOT_RAM",
    ]
  },
]

if (custom_signing_script != "") {
  custom_signed_zbi("signed") {
    output_name = "fuchsia.zbi"
    testonly = true
    deps = [
      ":fuchsia",
    ]
    zbi = get_target_outputs(":fuchsia")
  }
  images += [
    {
      deps = [
        ":signed",
      ]
      sdk = "fuchsia.zbi.signed"
      updater = "zbi.signed"
      json = {
        name = "zircon-a.signed"
        type = "zbi.signed"
        bootserver_pave = [ "--zircona" ]
      }
      public = [
        "IMAGE_ZIRCONA_SIGNEDZBI",
      ]
    },
  ]
  if (use_vbmeta) {
    images += [
      {
        deps = [
          ":signed",
        ]
        sources = [
          "$root_out_dir/fuchsia.zbi.vbmeta",
        ]
        json = {
          name = "zircon-a.vbmeta"
          type = "vbmeta"
          bootserver_pave = [ "--vbmetaa" ]
        }
        public = [
          "IMAGE_VBMETAA_RAW",
        ]
      },
    ]
  }
} else if (use_vboot) {
  # ChromeOS vboot images.
  vboot("signed") {
    testonly = true
    output_name = "fuchsia.zbi"
    deps = [
      ":fuchsia",
    ]
  }
  images += [
    {
      deps = [
        ":signed",
      ]
      sdk = "zircon-a.signed"
      updater = "zbi.signed"
      installer = "fuchsia.zbi"
      json = {
        name = "zircon-a.signed"
        type = "zbi.signed"
        bootserver_pave = [ "--zircona" ]
      }
      public = [
        "IMAGE_ZIRCONA_SIGNEDZBI",
      ]
    },
  ]
}

# The updater also wants the zedboot zbi as recovery.
if (custom_signing_script != "") {
  images += [
    {
      deps = [
        "zedboot:signed",
      ]
      sources = [
        "$root_out_dir/zedboot.zbi.signed",
      ]
      updater = "zedboot.signed"
    },
  ]
} else if (use_vboot) {
  images += [
    {
      deps = [
        "zedboot:signed",
      ]
      sources = [
        "$root_out_dir/zedboot.vboot",
      ]
      updater = "zedboot.signed"
      installer = "zedboot.zbi"
    },
  ]
} else {
  images += [
    {
      deps = [
        "zedboot:zbi",
      ]
      sources = [
        "$root_out_dir/zedboot.zbi",
      ]
      updater = "zedboot"
      installer = "zedboot.zbi"
    },
  ]
}

###
### Complete images for booting and installing the whole system.
###

declare_args() {
  # Build boot images that prefer Zedboot over local boot (only for EFI).
  always_zedboot = false
}

# data.blk creates minfs data partition containing the preinstall package
# index. The partition is included in fvm.blk and fvm.sparse.blk.
# To increase the size of the data partition, increase the total size of the
# fvm images using |fvm_image_size|.
zircon_tool_action("data.blk") {
  testonly = true
  tool = "minfs"
  data_image_path = "$target_out_dir/$target_name"
  outputs = [
    data_image_path,
  ]
  depfile = data_image_path + ".d"
  deps = [
    ":preinstall.manifest",
  ]
  preinstall_manifest = get_target_outputs(deps[0])
  args = [
    "--depfile",
    rebase_path(data_image_path, root_build_dir),
    "create",
    "--manifest",
    rebase_path(preinstall_manifest[0], root_build_dir),
  ]
  if (data_partition_manifest != "") {
    args += [
      "--manifest",
      rebase_path(data_partition_manifest),
    ]
  }
}
images += [
  {
    public = [
      "IMAGE_DATA_RAW",
    ]
    json = {
      name = "data"
      type = "blk"
    }
    deps = [
      ":data.blk",
    ]
  },
]

# Record the maximum allowable FVM size in the build directory for later steps
# to check against.
max_fvm_size_file = "$root_build_dir/max_fvm_size.txt"
write_file(max_fvm_size_file, max_fvm_size)

# fvm.blk creates an FVM partition image containing the blob partition produced
# by blob.blk and the data partition produced by data.blk. fvm.blk is primarily
# invoked and used by the qemu run, via `fx run`.
generate_fvm("fvm.blk") {
  testonly = true
  output_name = "$target_out_dir/fvm.blk"
  args = fvm_create_args
  if (fvm_image_size != "") {
    args += [
      "--length",
      fvm_image_size,
    ]
  }
  partitions = [
    {
      type = "blob"
      dep = ":blob.blk"
      minimum_inodes = blobfs_minimum_inodes
      minimum_data_bytes = blobfs_minimum_data_bytes
      maximum_bytes = blobfs_maximum_bytes
    },
    {
      type = "data"
      dep = ":data.blk"
      minimum_inodes = minfs_minimum_inodes
      minimum_data_bytes = minfs_minimum_data_bytes
      maximum_bytes = minfs_maximum_bytes
    },
  ]
}
images += [
  {
    deps = [
      ":fvm.blk",
    ]
    json = {
      name = "storage-full"
      type = "blk"
    }
    sdk = "fvm.blk"
    public = [
      "IMAGE_FVM_RAW",
    ]
  },
]

# fvm.sparse.blk creates a sparse FVM partition image containing the blob
# partition produced by blob.blk and the data partition produced by data.blk.
# fvm.sparse.blk is primarily invoked and used by the paver boot, via `fx
# pave`.
generate_fvm("fvm.sparse.blk") {
  testonly = true
  output_name = "$target_out_dir/fvm.sparse.blk"
  deps = [
    ":blob.blk",
    ":data.blk",
  ]
  args = fvm_sparse_args
  partitions = [
    {
      type = "blob"
      dep = ":blob.blk"
      minimum_inodes = blobfs_minimum_inodes
      minimum_data_bytes = blobfs_minimum_data_bytes
      maximum_bytes = blobfs_maximum_bytes
    },
    {
      type = "data"
      dep = ":data.blk"
      minimum_inodes = minfs_minimum_inodes
      minimum_data_bytes = minfs_minimum_data_bytes
      maximum_bytes = minfs_maximum_bytes
    },
  ]
}
images += [
  {
    deps = [
      ":fvm.sparse.blk",
    ]
    json = {
      name = "storage-sparse"
      type = "blk"
      bootserver_pave = [ "--fvm" ]
    }
    installer = "fvm.sparse.blk"
    sdk = "fvm.sparse.blk"
    public = [
      "IMAGE_FVM_SPARSE",
    ]
  },
]

# fvm.blob.sparse.blk creates a sprase FVM partition image containing the blob
# partition produced by blob.blk.
generate_fvm("fvm.blob.sparse.blk") {
  testonly = true
  output_name = "$target_out_dir/$target_name"
  deps = [
    ":blob.blk",
  ]
  args = fvm_sparse_args
  partitions = [
    {
      type = "blob"
      dep = ":blob.blk"
      minimum_inodes = blobfs_minimum_inodes
      minimum_data_bytes = blobfs_minimum_data_bytes
      maximum_bytes = blobfs_maximum_bytes
    },
  ]
}
images += [
  {
    deps = [
      ":fvm.blob.sparse.blk",
    ]
    public = [
      "IMAGE_FVM_BLOB_SPARSE",
    ]
  },
]

# This rolls the primary ZBI together with a compressed RAMDISK image of
# fvm.blk into a fat ZBI that boots the full system without using any real
# storage.  The system decompresses the fvm.blk image into memory and then
# sees that RAM disk just as if it were a real disk on the device.
zbi("netboot") {
  testonly = true
  deps = [
    ":fuchsia",
    ":fvm.blk",
  ]
  inputs = get_target_outputs(":fuchsia")
  ramdisk_inputs = get_target_outputs(":fvm.blk")
}
images += [
  {
    default = false
    json = {
      bootserver_netboot = [ "--boot" ]
      name = "netboot"
      type = "zbi"
    }
    public = [
      "IMAGE_NETBOOT_ZBI",

      # TODO(mcgrathr): The complete ZBI can be used with a separate kernel
      # too, the kernel image in it will just be ignored.  So just use the
      # primary ZBI for this until all uses are converted to using the ZBI
      # alone.  Then remove this as IMAGE_BOOT_RAM variable should no
      # longer be in use.
      "IMAGE_NETBOOT_RAM",
    ]
    deps = [
      ":netboot",
    ]
  },
]

if (target_cpu != "arm64" && !use_vboot) {
  # TODO(surajmalhotra): Remove this target once SDK no longer depends on it.
  vboot("vboot") {
    testonly = true
    output_name = "fuchsia"
    deps = [
      ":fuchsia",
    ]
  }
  images += [
    {
      json = {
        name = "zircon-vboot"
        type = "vboot"
      }
      deps = [
        ":vboot",
      ]
      sdk = "zircon.vboot"
    },
  ]

  # EFI ESP images.
  esp("esp") {
    output_name = "fuchsia"
    testonly = true
    if (always_zedboot) {
      cmdline = "zedboot/efi_cmdline.txt"
    } else {
      cmdline = "efi_local_cmdline.txt"
    }
  }
  images += [
    {
      deps = [
        ":esp",
      ]
      json = {
        name = "efi"
        type = "blk"
        bootserver_pave = [ "--bootloader" ]
      }
      installer = "fuchsia.esp.blk"
      sdk = "local.esp.blk"
      updater = "bootloader"
      public = [
        "IMAGE_ESP_RAW",
      ]
    },
    {
      deps = [
        "zedboot:esp",
      ]
      sources = [
        "$root_out_dir/zedboot.esp.blk",
      ]
    },
  ]
}

installer_label = "//garnet/bin/installer:install-fuchsia"
installer_out_dir = get_label_info(installer_label, "root_out_dir")
installer_path = "$installer_out_dir/install-fuchsia"

action("installer.manifest") {
  script = "manifest.py"
  outputs = [
    "$target_out_dir/installer.manifest",
  ]
  args = [
    "--output=" + rebase_path(outputs[0], root_build_dir),
    "--output-cwd=" + rebase_path(target_out_dir, root_build_dir),
    "--entry=install-fuchsia=" + rebase_path(installer_path, root_build_dir),
  ]
  foreach(image, images) {
    if (defined(image.installer)) {
      image_sources = []
      if (defined(image.sources)) {
        image_sources += image.sources
      } else {
        foreach(label, image.deps) {
          image_sources += get_target_outputs(label)
        }
      }
      assert(image_sources == [ image_sources[0] ])
      args += [ "--entry=${image.installer}=" +
                rebase_path(image_sources[0], root_build_dir) ]
    }
  }
}

# installer.blk is a minfs partition image that includes all of the
# images required to install a Fuchsia build.
zircon_tool_action("installer") {
  testonly = true
  tool = "minfs"
  deps = [
    ":installer.manifest",
    installer_label,
  ]
  outputs = [
    "$target_out_dir/installer.blk",
  ]
  sources = []
  foreach(image, images) {
    if (defined(image.installer)) {
      deps += image.deps
      if (defined(image.sources)) {
        sources += image.sources
      } else {
        foreach(label, image.deps) {
          sources += get_target_outputs(label)
        }
      }
    }
  }
  depfile = "$target_out_dir/installer.blk.d"
  args = [
    "--depfile",
    rebase_path(outputs[0], root_build_dir),
    "create",
    "--manifest",
  ]
  args += rebase_path(get_target_outputs(deps[0]), root_build_dir)
}
images += [
  {
    default = false
    public = [
      "IMAGE_INSTALLER_RAW",
    ]
    deps = [
      ":installer",
    ]
  },
]

group("images") {
  testonly = true
  deps = [
    ":ids.txt",
    ":package_lists",
    ":paver-script",
    "zedboot",
  ]
}

group("default-images") {
  testonly = true
  deps = []
  foreach(image, images) {
    if (!defined(image.default) || image.default) {
      deps += image.deps
    }
  }
}

###
### Paver and flash scripts, and archives using those images and zedboot's images.
###

action("flash_script") {
  script = "//build/images/generate_flash_script.sh"
  outputs = [
    "$root_out_dir/flash.sh",
  ]
  image = "$root_out_dir/zedboot.zbi"
  args = [
    "--image=" + rebase_path(image, root_build_dir),
    "--output=" + rebase_path(outputs[0], root_build_dir),
    "--zircon-a=${zircon_a_partition}",
    "--zircon-b=${zircon_b_partition}",
    "--zircon-r=${zircon_r_partition}",
    "--vbmeta-a=${vbmeta_a_partition}",
    "--vbmeta-b=${vbmeta_b_partition}",
    "--vbmeta-r=${vbmeta_r_partition}",
    "--active=${active_partition}",
    "--signed=${signed_image}",
  ]
}

paver_targets = [
  {
    name = "paver-script"
    outputs = [
      "$root_build_dir/pave.sh",
    ]
    switch = "--pave="
    json = {
      name = "pave"
      type = "sh"
    }
  },
  {
    name = "netboot-script"
    outputs = [
      "$root_build_dir/netboot.sh",
    ]
    switch = "--netboot="
    json = {
      name = "netboot"
      type = "sh"
    }
  },
]
foreach(format,
        [
          "tgz",
          "zip",
        ]) {
  paver_targets += [
    {
      name = "archive-$format"
      outputs = [
        "$root_build_dir/build-archive.$format",
      ]
      switch = "--archive="
      json = {
        name = "archive"
        type = "$format"
      }
    },
    {
      name = "symbol-archive-$format"
      outputs = [
        "$root_build_dir/symbol-archive.$format",
      ]
      switch = "--symbol-archive="
      json = {
        name = "symbol-archive"
        type = "$format"
      }
    },
  ]
}

foreach(target, paver_targets) {
  images += [
    {
      path = rebase_path(target.outputs, root_build_dir)
      path = path[0]
      json = target.json
      deps = [
        ":${target.name}",
      ]
    },
  ]
  action(target.name) {
    deps = [
      ":default-images",
      ":flash_script",
      ":ids.txt",
      ":netboot",
      "zedboot",
    ]
    testonly = true
    sources = [
      "$root_build_dir/images.json",
      "$root_build_dir/zedboot_images.json",
    ]
    outputs = target.outputs
    depfile = "${outputs[0]}.d"
    script = "pack-images.py"
    args = [
      "--depfile=" + rebase_path(depfile, root_build_dir),
      target.switch + rebase_path(outputs[0], root_build_dir),
      "--board_name=${board_name}",
    ]
    args += rebase_path(sources, root_build_dir)
  }
}

###
### Amber updates.
###

# update_packages.manifest contains the same entries as the pkgsvr_index but
# additionally includes the system_image package.

update_meta_far_merkle_index = "$target_out_dir/update_meta_far_merkle_index"
package_metadata_list("update_meta_far_merkle_index") {
  testonly = true
  outputs = [
    update_meta_far_merkle_index,
  ]
  data_keys = [ "meta_far_merkle_index_entries" ]
  deps = [
    ":meta_packages",
    ":monolith_packages",
    ":system_image.meta",
  ]
}

action("update_packages.manifest") {
  visibility = [ ":update.manifest" ]
  testonly = true

  outputs = [
    "$target_out_dir/$target_name",
  ]
  deps = [
    ":update_meta_far_merkle_index",
  ]
  inputs = [
    update_meta_far_merkle_index,
  ]

  script = "manifest_content_expand.sh"
  args = [
    rebase_path(update_meta_far_merkle_index, root_build_dir),
    rebase_path(outputs[0], root_build_dir),
  ]
}

# The update package manifest contains the pkgsvr_index and the target
# system kernel images.
action("update.manifest") {
  visibility = [ ":*" ]
  testonly = true

  update_manifest = [
    {
      target = "packages"
      deps = [
        ":update_packages.manifest",
      ]
    },

    # Add the meta/package JSON file that makes this the "update" package.
    {
      target = "meta/package"
      sources = [
        "update_package.json",
      ]
    },
  ]

  foreach(image, images) {
    if (defined(image.updater)) {
      if (update_kernels == []) {
        update_manifest += [
          {
            target = image.updater
            forward_variables_from(image,
                                   [
                                     "deps",
                                     "sources",
                                   ])
          },
        ]
      } else {
        foreach(kernel, update_kernels) {
          if (image.updater == kernel) {
            update_manifest += [
              {
                target = image.updater
                forward_variables_from(image,
                                       [
                                         "deps",
                                         "sources",
                                       ])
              },
            ]
          }
        }
      }
    }
  }

  update_manifest += [
    {
      target = "board"
      sources = [ board_name_file ]
    }
  ]

  script = "manifest.py"

  outputs = [
    "$target_out_dir/$target_name",
  ]

  args = [ "--output=" + rebase_path(outputs[0], root_build_dir) ]
  sources = []
  deps = []

  foreach(entry, update_manifest) {
    entry_source = ""
    if (defined(entry.deps)) {
      deps += entry.deps
    }

    if (defined(entry.sources)) {
      # TODO(BLD-354): We should only have single source
      sources = []
      sources += entry.sources
      entry_source = sources[0]
    } else if (defined(entry.deps)) {
      foreach(label, entry.deps) {
        # TODO(BLD-354): We should only have single output
        dep_outputs = []
        dep_outputs += get_target_outputs(label)
        entry_source = dep_outputs[0]
      }
    }
    entry_source = rebase_path(entry_source, root_build_dir)
    args += [ "--entry=${entry.target}=${entry_source}" ]
  }
}

pm_build_package("update.meta") {
  visibility = [ ":*" ]
  testonly = true
  manifest = ":update.manifest"
  package_name = "update"
}

# XXX(raggi): The following manifests retain the "meta/" files, resulting in
# them being added as blobs, which they should not be. A likely better solution
# here is to teach pm_build_package to produce either a blob manifest or a
# manifest.py --contents compatible response file that excludes these files.

action("update.sources.manifest") {
  visibility = [ ":*" ]
  testonly = true
  script = "manifest.py"
  deps = [
    ":update.manifest",
  ]
  outputs = [
    "$target_out_dir/update.sources.manifest",
  ]
  update_manifests = get_target_outputs(deps[0])
  args = [
    "--sources",
    "--output=" + rebase_path(outputs[0], root_build_dir),
    "--manifest=" + rebase_path(update_manifests[0]),
  ]
}

# The amber index is the index of all requested packages, naming each meta.far
# file instead of its merkleroot. Additionally the amber_index has the system
# package itself, and the system update package.
amber_index = "$target_out_dir/amber_index"

package_metadata_list("amber_index") {
  visibility = [ ":amber_publish_index" ]
  testonly = true

  outputs = [
    amber_index,
  ]
  data_keys = [ "meta_far_index_entries" ]
  deps = [
    ":packages",
    ":system_image.meta",
    ":update.meta",
  ]
}

# The component index is the index of components in all available packages.
component_index_metadata = "$target_out_dir/component_index_metadata"
component_index_metadata_list("component_index_metadata") {
  visibility = [ "//garnet/bin/component_index:*" ]

  testonly = true

  outputs = [
    component_index_metadata,
  ]

  deps = [
    ":available_packages",
  ]
}

# The system index is the index of all available packages, naming each blobs.json
# file instead of its merkleroot, and including a tag of the package set the
# package is a part of (monolith/preinstall/available). Additionally the
# system_index has the system package itself, and the system update package.
system_index = "$target_out_dir/system_index"

tagged_snapshot_manifests = [
  {
    tag = "monolith"
    deps = [
      ":meta_packages",
      ":monolith_packages",
      ":system_image.meta",
      ":update.meta",
    ]
  },
  {
    tag = "preinstall"
    deps = [
      ":preinstall_packages",
    ]
  },
  {
    tag = "available"
    deps = [
      ":available_packages",
    ]
  },
]

all_snapshot_entries = []
foreach(manifest, tagged_snapshot_manifests) {
  untagged_entries = "${manifest.tag}.snapshot_entries.untagged"
  package_metadata_list(untagged_entries) {
    testonly = true
    outputs = [
      target_gen_dir + "/" + target_name,
    ]
    deps = manifest.deps
    data_keys = [ "snapshot_entries" ]
  }

  tagged_entries = "${manifest.tag}.snapshot_entries"
  action(tagged_entries) {
    testonly = true
    deps = [
      ":" + untagged_entries,
    ]
    script = "add_tag_to_manifest.sh"
    inputs = [
      target_gen_dir + "/" + untagged_entries,
    ]
    outputs = [
      root_build_dir + "/" + target_name,
    ]
    args = [
      manifest.tag,
      rebase_path(inputs[0], root_build_dir),
      rebase_path(outputs[0], root_build_dir),
    ]
  }
  all_snapshot_entries += [ tagged_entries ]
}

action("system_index") {
  visibility = [ ":system_snapshot" ]
  testonly = true

  script = "//build/cat.sh"
  outputs = [
    "$target_out_dir/$target_name",
  ]
  args = [ rebase_path(outputs[0], root_build_dir) ]
  deps = []
  foreach(entry, all_snapshot_entries) {
    args += [ entry ]
    deps += [ ":" + entry ]
  }
}

compiled_action("system_snapshot") {
  tool = "//garnet/go/src/pm:pm_bin"
  tool_output_name = "pm"

  visibility = [ ":updates" ]
  testonly = true

  deps = [
    ":system_index",
  ]

  inputs = [
    system_index,
  ]

  outputs = [
    "$target_out_dir/system.snapshot",
  ]

  args = [
    "snapshot",
    "--manifest",
    rebase_path(inputs[0], root_build_dir),
    "--output",
    rebase_path(outputs[0], root_build_dir),
  ]
}

# Available blob manifest is a manifest of merkleroot=source_path for all blobs
# in all packages produced by the build, including the system image and the
# update package.
available_blob_manifest = "$root_build_dir/available_blobs.manifest"

collect_blob_manifest("available_blobs.manifest") {
  visibility = [ ":*" ]
  testonly = true
  outputs = [
    available_blob_manifest,
  ]
  deps = [
    ":packages",
    ":system_image.meta",
    ":update.meta",
  ]
}

# Populate the repository directory with content ID-named copies.
action("amber_publish_blobs") {
  testonly = true
  outputs = [
    "$amber_repository_dir.stamp",
  ]
  deps = [
    ":available_blobs.manifest",
  ]
  inputs = []
  foreach(dep, deps) {
    inputs += get_target_outputs(dep)
  }
  script = "manifest.py"
  args = [
    "--copy-contentaddr",
    "--output=" + rebase_path(amber_repository_blobs_dir),
    "--stamp=" + rebase_path("$amber_repository_dir.stamp"),
  ]
  foreach(manifest, inputs) {
    args += [ "--manifest=" + rebase_path(manifest, root_build_dir) ]
  }
}

# Sign and publish the package index.
pm_publish("amber_publish_index") {
  testonly = true
  deps = [
    ":amber_index",
  ]
  inputs = [
    amber_index,
  ]
}

group("updates") {
  testonly = true
  deps = [
    ":amber_publish_blobs",
    ":amber_publish_index",
    ":ids.txt",
    ":package_lists",
    ":system_snapshot",
  ]
}

###
### Build ID maps.
###
### TODO(TC-303): ids.txt is deprecated and will be removed.
### The toolchain rules already populate $root_build_dir/.build-id/.
###

generated_file("package-build-id-files.list") {
  testonly = true
  visibility = [ ":package-ids.txt" ]

  data_keys = [ "build_ids" ]
  walk_keys = [ "build_ids_barrier" ]
  outputs = [
    "$target_gen_dir/package-build-id-files.list",
  ]

  deps = [
    ":available_packages",
  ]
}

compiled_action("package-ids.txt") {
  testonly = true
  visibility = [ ":ids.txt" ]

  deps = [
    ":package-build-id-files.list",
  ]

  inputs = [
    "$target_gen_dir/package-build-id-files.list",
  ]

  outputs = [
    "$target_gen_dir/package-ids.txt",
  ]

  depfile = "$target_gen_dir/package-ids.txt.d"

  tool = "//build/tools/merge_and_sort"

  args = rebase_path(inputs + outputs + [ depfile ], root_build_dir)
}

# Combine the /boot, /system, and package build ID maps into one.
# Nothing in the build uses this, but top-level targets always update
# it so that debugging tools can rely on it.
action("ids.txt") {
  testonly = true

  deps = [
    ":kernel-ids.txt",
    ":package-ids.txt",
    ":system_image.manifest",
  ]
  sources = [
    "$target_gen_dir/package-ids.txt",
    "$target_out_dir/kernel-ids.txt",
    system_build_id_map,
  ]

  script = "/usr/bin/sort"
  outputs = [
    "$root_out_dir/ids.txt",
  ]
  args = [
           "-u",
           "-o",
         ] + rebase_path(outputs + sources, root_build_dir)
}

# The vDSO doesn't appear in any package and so doesn't get into any
# ids.txt file produced by generate_manifest().  But it appears in memory
# at runtime and in backtraces, so it should be in the aggregated ids.txt
# for symbolization.  The vDSO doesn't appear in zircon_boot_manifests, so
# fetching it out of Zircon's own ids.txt by name is the only thing to do.
# Likewise for the kernel itself, whose build ID is useful to have in the map.
action("kernel-ids.txt") {
  script = "manifest.py"
  sources = [
    "$zircon_root_build_dir/ids-$current_cpu.txt",
  ]
  outputs = [
    "$target_out_dir/kernel-ids.txt",
  ]
  args = [
    "--separator= ",
    "--absolute",
    "--output=" + rebase_path(outputs[0], root_build_dir),
    "--include-source=*/libzircon.so.debug",
    "--include-source=*/zircon.elf",
    "--cwd=" + rebase_path(zircon_root_build_dir, root_build_dir),
    "--manifest=" + rebase_path(sources[0], root_build_dir),
  ]
}

images += [
  {
    deps = [
      ":ids.txt",
    ]
    json = {
      name = "build-id"
      type = "txt"
    }
  },
]

write_images_manifest("images-manifest") {
  public = [ "FUCHSIA_BOARD_NAME=${board_name}" ]
  outputs = [
    "$root_build_dir/images.json",
    "$root_build_dir/image_paths.sh",
  ]
}

###
### SDK
###

sdk_images = []

foreach(image, images) {
  if (defined(image.sdk)) {
    image_target_name = "${image.sdk}_sdk"
    sdk_images += [ ":$image_target_name" ]
    sdk_atom(image_target_name) {
      id = "sdk://images/${image.sdk}"
      category = "partner"
      testonly = true

      file_content = "target/$target_cpu/${image.sdk}"
      meta = {
        dest = "images/${image.sdk}-meta.json"
        schema = "image"
        value = {
          type = "image"
          name = "${image.sdk}"
          file = {
            if (target_cpu == "x64") {
              x64 = file_content
            } else if (target_cpu == "arm64") {
              arm64 = file_content
            } else {
              assert(false, "Unsupported target architecture: $target_cpu")
            }
          }
        }
      }

      image_sources = []
      if (defined(image.sources)) {
        image_sources += image.sources
      } else {
        foreach(label, image.deps) {
          image_sources += get_target_outputs(label)
        }
      }

      files = [
        {
          source = image_sources[0]
          dest = "target/$target_cpu/${image.sdk}"
        },
      ]

      non_sdk_deps = image.deps
    }
  }
}

sdk_molecule("images_sdk") {
  testonly = true

  deps = sdk_images
}