# 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/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/crashpad.gni")
import("//build/images/custom_signing.gni")
import("//build/images/json.gni")
import("//build/images/manifest.gni")
import("//build/package.gni")
import("//build/sdk/sdk_atom.gni")
import("//build/sdk/sdk_molecule.gni")
import("//garnet/go/src/amber/amber.gni")

declare_args() {
  # Groups to include from the Zircon /boot manifest into /boot.
  # This is either "all" or a comma-separated list of one or more of:
  #   core -- necessary to boot
  #   misc -- utilities in /bin
  #   test -- test binaries in /bin and /test
  zircon_boot_groups = "core"
}

declare_args() {
  # Groups to include from the Zircon /boot manifest into /system
  # (instead of into /boot like Zircon's own bootdata.bin does).
  # Should not include any groups that are also in zircon_boot_groups,
  # which see.  If zircon_boot_groups is "all" then this should be "".
  # **TODO(mcgrathr)**: _Could default to "" for `!is_debug`, or "production
  # build".  Note including `"test"` here places all of Zircon's tests into
  # `/system/test`, which means that Fuchsia bots run those tests too._
  zircon_system_groups = "misc,test"
  if (zircon_boot_groups == "all") {
    zircon_system_groups = ""
  }
}

if (zircon_boot_groups == "all") {
  assert(zircon_system_groups == "",
         "zircon_boot_groups already has everything")
} else {
  assert(zircon_system_groups != "all" && zircon_system_groups != "core",
         "zircon_system_groups cannot include core (or all)")
}

# 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 = []
  },
]

# Write a JSON metadata file about the packages in the build.
_packages_json = {
  _all = []
  monolith = []
  foreach(pkg, monolith_packages) {
    monolith += [ get_label_info(pkg, "name") ]
    _all += [ pkg ]
    _all -= [ pkg ]
    _all += [ pkg ]
  }
  preinstall = []
  foreach(pkg, preinstall_packages) {
    preinstall += [ get_label_info(pkg, "name") ]
    _all += [ pkg ]
    _all -= [ pkg ]
    _all += [ pkg ]
  }
  available = []
  foreach(pkg, available_packages) {
    available += [ get_label_info(pkg, "name") ]
    _all += [ pkg ]
    _all -= [ pkg ]
    _all += [ pkg ]
  }
  packages = []
  foreach(pkg, _all) {
    packages += [
      {
        dir = get_label_info(pkg, "dir")
        name = get_label_info(pkg, "name")
        build_dir =
            rebase_path(get_label_info(pkg, "target_out_dir"), root_build_dir)
      },
    ]
  }
}
write_file("$root_build_dir/packages.json",
           {
             forward_variables_from(_packages_json, "*", [ "_all" ])
           },
           "json")

# TODO(mcgrathr): Temporary until scripts and recipes get updated.
legacy_images_dir = "$root_out_dir/images"
board = "qemu"
if (target_cpu == "x64") {
  board = "pc"
}

###
### 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 ])
}

# 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

  script = "manifest.py"
  args = [ "--contents" ]
  outputs = [
    "$target_out_dir/$target_name",
  ]
  args += [ "--output=" + rebase_path(outputs[0], root_build_dir) ]
  sources = []
  deps = []
  foreach(pkg_label, monolith_packages) {
    # Find the response file written by package().
    pkg_target_name = get_label_info(pkg_label, "name")
    pkg_target_out_dir = get_label_info(pkg_label, "target_out_dir")
    pkg_rspfile = "$pkg_target_out_dir/${pkg_target_name}.pkgsvr_index.rsp"
    deps += [ "${pkg_label}.pkgsvr_index.rsp" ]
    sources += [ pkg_rspfile ]
    args += [ "@" + rebase_path(pkg_rspfile, 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"

# 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 = zircon_boot_groups

  # Collect whatever we want from Zircon that didn't go into /boot.
  zircon_groups = zircon_system_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).
  args = []
  deps = []
  sources = []
  foreach(pkg_label, monolith_packages) {
    # Find the response file written by package().
    pkg_target_name = get_label_info(pkg_label, "name")
    pkg_target_out_dir = get_label_info(pkg_label, "target_out_dir")
    pkg_system_rsp = "$pkg_target_out_dir/${pkg_target_name}.system.rsp"
    deps += [ pkg_label ]
    sources += [ pkg_system_rsp ]
    args += [ "@" + rebase_path(pkg_system_rsp, 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_manifest = system_manifest_outputs[0]
system_build_id_map = system_manifest_outputs[1]

# Generate, sign, and seal the system_image package file.
pm_build_package("system_image.meta") {
  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"

action("blob.manifest") {
  visibility = [ ":*" ]
  testonly = true
  deps = [
    ":system_image.manifest",
    ":system_image.meta",
  ]
  outputs = [
    blob_manifest,
  ]
  inputs = [
    system_manifest,
  ]
  script = "manifest.py"
  args = [ "@{{response_file_name}}" ]
  response_file_contents = [
    "--sources",
    "--output=" + rebase_path(blob_manifest, root_build_dir),
    "--manifest=" + rebase_path(system_manifest, root_build_dir),
    "--entry=system_image/meta.far=" +
        rebase_path("$target_out_dir/system_image.meta/meta.far",
                    root_build_dir),
  ]
  foreach(pkg_label, monolith_packages + preinstall_packages) {
    pkg_target_name = get_label_info(pkg_label, "name")
    pkg_target_out_dir = get_label_info(pkg_label, "target_out_dir")
    pkg_blob_rsp = "$pkg_target_out_dir/${pkg_target_name}.blob.rsp"
    deps += [ "${pkg_label}.blob.rsp" ]
    inputs += [ pkg_blob_rsp ]
    response_file_contents +=
        [ "@" + rebase_path(pkg_blob_rsp, root_build_dir) ]
  }
}

# Pack up all the blobs!
zircon_tool_action("blob.blk") {
  visibility = [ ":*" ]
  testonly = true
  deps = [
    ":blob.manifest",
  ]
  blob_image_path = "$target_out_dir/$target_name"
  outputs = [
    blob_image_path,
  ]
  depfile = blob_image_path + ".d"
  inputs = [
    blob_manifest,
  ]
  tool = "blobfs"
  args = [
    "--depfile",
    "--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,
  # and the one generated for [`enable_crashpad`](#enable_crashpad).
  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 = []
    if (current_cpu == "arm64") {
      sources = [
        "$zircon_build_dir/qemu-boot-shim.bin",
      ]
    } else if (current_cpu == "x64") {
      sources = [
        "$zircon_build_dir/multiboot.bin",
      ]
    }
  },
]

# 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_label = "//garnet/go/src/pmd:pkgsvr"
  pkgfs = "bin/" + get_label_info(pkgfs_label, "name")
  pkgfs_label += ".meta"
  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",
  ]

  if (enable_crashpad) {
    args += [ "--entry=crashsvc.analyzer=from-appmgr" ]
  }

  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),
  ]
}

# 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",
  ]
  inputs = [
    "${zircon_build_dir}/kernel.zbi",
    boot_manifest,
  ]
  manifest = [
    {
      outputs = [
        "config/devmgr",
      ]
      sources = get_target_outputs(":devmgr_config.txt")
    },
  ]
  cmdline = kernel_cmdline_args
  cmdline_inputs = kernel_cmdline_files
  manifest += bootfs_extra
}
images += [
  {
    deps = [
      ":fuchsia",
    ]
    sdk = "fuchsia.zbi"
    updater = "zbi"
    json = {
      name = "zircon-a"
      type = "zbi"

      # The empty string means "kernel", i.e. the primary ZBI.
      bootserver = [ "" ]
      if (custom_signing_script == "") {
        bootserver += [
          "--zircona",
          "--zirconr",
        ]
      }
    }
    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",
    ]
    legacy_copy = "bootdata-blob-${board}.bin"
    legacy_copy_dir = root_out_dir
  },
]

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 = [ "--zircona" ]
      }
      public = [
        "IMAGE_ZIRCONA_SIGNEDZBI",
      ]
    },
  ]
}

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

declare_args() {
  # The size of the minfs data partition image to create. Normally this image
  # is added to FVM, and can therefore expand as needed. It must be at least
  # 10mb (the default) in order to be succesfully initialized.
  data_image_size = "10m"

  # The size in bytes of the FVM partition image to create. Normally this is
  # computed to be just large enough to fit the blob and data images. The
  # default value is "", which means to size based on inputs. Specifying a size
  # that is too small will result in build failure.
  fvm_image_size = ""

  # The size of the FVM partition images "slice size". The FVM slice size is a
  # minimum size of a particular chunk of a partition that is stored within
  # FVM. A very small slice size may lead to decreased throughput. A very large
  # slice size may lead to wasted space. The selected default size of 8mb is
  # selected for conservation of space, rather than performance.
  fvm_slice_size = "8388608"

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

template("generate_fvm") {
  zircon_tool_action(target_name) {
    visibility = [ ":*" ]
    forward_variables_from(invoker, [ "testonly" ])
    tool = "fvm"
    outputs = [
      invoker.output_name,
    ]
    sources = []
    deps = invoker.deps
    foreach(label, deps) {
      sources += get_target_outputs(label)
    }
    args = rebase_path(outputs, root_build_dir) + invoker.args +
           rebase_path(sources, root_build_dir)
  }
}

fvm_slice_args = [
  "--slice",
  fvm_slice_size,
]

fvm_create_args = [ "create" ] + fvm_slice_args

fvm_sparse_args = [
                    "sparse",
                    "--compress",
                    "lz4",
                  ] + fvm_slice_args

# fvm.blk creates a non-sparse FVM partition image containing the blob
# partition produced by blob.blk.  fvm.blk is primarily invoked and used
# by the qemu run, via `fx run-fvm`.
generate_fvm("fvm.blk") {
  testonly = true
  output_name = "$target_out_dir/fvm.blk"
  deps = [
    ":blob.blk",
  ]
  args = fvm_create_args
  if (fvm_image_size != "") {
    args += [
      "--length",
      fvm_image_size,
    ]
  }
  args += [ "--blob" ]
}
images += [
  {
    deps = [
      ":fvm.blk",
    ]
    json = {
      name = "storage-full"
      type = "blk"
    }
    sdk = "fvm.blk"
    public = [
      "IMAGE_FVM_RAW",
    ]
    legacy_copy = "fvm.blk"
    legacy_copy_dir = legacy_images_dir
  },
]

# data.blk creates an empty but initialized minfs data partition.
# The partition is included in fvm.sparse.blk.
zircon_tool_action("data.blk") {
  tool = "minfs"
  data_image_path = "$target_out_dir/$target_name"
  outputs = [
    data_image_path,
  ]
  args = [
    rebase_path(data_image_path, root_build_dir) + "@${data_image_size}",
    "create",
  ]
}
images += [
  {
    public = [
      "IMAGE_DATA_RAW",
    ]
    json = {
      name = "data"
      type = "blk"
    }
    deps = [
      ":data.blk",
    ]
  },
]

# 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
# boot`.
zircon_tool_action("fvm.sparse.blk") {
  testonly = true
  visibility = [ ":*" ]
  tool = "fvm"
  outputs = [
    "$target_out_dir/fvm.sparse.blk",
  ]
  sources = []
  deps = [
    ":blob.blk",
    ":data.blk",
  ]
  foreach(label, deps) {
    sources += get_target_outputs(label)
  }

  # Note: this action can not be expressed using the `generate_fvm` template
  # because it needs to interleave the blob and data flags.
  args = rebase_path(outputs, root_build_dir) + fvm_sparse_args + [ "--blob" ] +
         rebase_path(get_target_outputs(":blob.blk"), root_build_dir) +
         [ "--data" ] +
         rebase_path(get_target_outputs(":data.blk"), root_build_dir)
}
images += [
  {
    deps = [
      ":fvm.sparse.blk",
    ]
    json = {
      name = "storage-sparse"
      type = "blk"
      bootserver = [ "--fvm" ]
    }
    installer = "fvm.sparse.blk"
    sdk = "fvm.sparse.blk"
    public = [
      "IMAGE_FVM_SPARSE",
    ]
    legacy_copy = "fvm.sparse.blk"
    legacy_copy_dir = legacy_images_dir
  },
]

# 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 = {
      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",
    ]
    legacy_copy = "netboot.bin"
    legacy_copy_dir = root_out_dir
  },
]

# ChromeOS vboot images.
vboot("vboot") {
  testonly = true
  output_name = "fuchsia"
  deps = [
    ":fuchsia",
  ]
}
images += [
  {
    json = {
      name = "zircon-vboot"
      type = "vboot"
      if (current_cpu != "arm64") {
        bootserver = [ "--kernc" ]
      }
    }
    deps = [
      ":vboot",
    ]
    installer = "zircon.vboot"
    sdk = "zircon.vboot"
    updater = "kernc"
    public = [
      "IMAGE_ZIRCON_VBOOT",
    ]
    legacy_copy = "zircon-${board}.vboot"
    legacy_copy_dir = legacy_images_dir
  },
]

# The installer also wants the zedboot vboot image.
images += [
  {
    deps = [
      "zedboot:vboot",
    ]
    sources = [
      "$root_out_dir/zedboot.vboot",
    ]
    installer = "zedboot.vboot"
  },
]

if (target_cpu != "arm64") {
  # EFI ESP images.
  esp("esp") {
    output_name = "fuchsia"
    testonly = true
    if (always_zedboot) {
      cmdline = "zedboot/efi_cmdline.txt"
    } else {
      cmdline = "efi_local_cmdline.txt"
    }
    deps = [
      ":fuchsia",
      "zedboot:zbi",
    ]
    fuchsia_zbi_outputs = get_target_outputs(":fuchsia")
    zircon_bin = fuchsia_zbi_outputs[0]
    zedboot = "$root_out_dir/zedboot.zbi"
  }
  images += [
    {
      deps = [
        ":esp",
      ]
      json = {
        name = "efi"
        type = "blk"
        bootserver = [ "--efi" ]
      }
      installer = "local.esp.blk"
      sdk = "local.esp.blk"
      updater = "efi"
      public = [
        "IMAGE_ESP_RAW",
      ]
      legacy_copy = "local-${board}.esp.blk"
      legacy_copy_dir = legacy_images_dir
    },
    {
      deps = [
        "zedboot:esp",
      ]
      sources = [
        "$root_out_dir/zedboot.esp.blk",
      ]
      installer = "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 = [
    ":default-legacy-images",
    ":ids.txt",
    ":paver-script",
    "zedboot",
  ]
}

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

legacy_images = []
default_legacy_images = []
foreach(image, images) {
  if (defined(image.legacy_copy)) {
    copy("legacy_copy_" + image.legacy_copy) {
      visibility = [ ":legacy-images" ]
      if (!defined(image.default) || image.default) {
        visibility += [ ":default-legacy-images" ]
      }
      testonly = true
      deps = image.deps
      outputs = [
        "${image.legacy_copy_dir}/${image.legacy_copy}",
      ]
      sources = get_target_outputs(deps[0])
    }
    legacy_target = ":legacy_copy_${image.legacy_copy}"
    legacy_images += [ legacy_target ]
    if (!defined(image.default) || image.default) {
      default_legacy_images += [ legacy_target ]
    }
  }
}
group("legacy-images") {
  visibility = [ ":images" ]
  testonly = true
  deps = legacy_images
}
group("default-legacy-images") {
  visibility = [ ":images" ]
  testonly = true
  deps = default_legacy_images
}

###
### Paver script and archives using those images and zedboot's images.
###

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

foreach(target, paver_targets) {
  images += [
    {
      path = rebase_path(target.outputs, root_build_dir)
      path = path[0]
      json = target.json
      deps = [
        ":${target.name}",
      ]
    },
  ]
  action(target.name) {
    deps = [
      ":default-images",
      "zedboot",
    ]
    testonly = true
    sources = [
      "$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),
    ]
    args += rebase_path(sources, root_build_dir)
  }
}

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

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

# update_packages.manifest contains the same entries as the pkgsvr_index but
# additionally includes the system_image package.
action("update_packages.manifest") {
  visibility = [ ":update.manifest" ]
  testonly = true

  script = "manifest.py"
  outputs = [
    "$target_out_dir/$target_name",
  ]
  args = [
    "--contents",
    "--output",
    rebase_path(outputs[0], root_build_dir),
  ]
  deps = []
  sources = []

  deps += [ ":system_image.meta" ]
  args += [ "--entry=system_image/0=" +
            rebase_path("$target_out_dir/system_image.meta/meta.far.merkle",
                        root_build_dir) ]

  foreach(pkg_label, monolith_packages) {
    # Find the response file written by package().
    pkg_target_name = get_label_info(pkg_label, "name")
    pkg_target_out_dir = get_label_info(pkg_label, "target_out_dir")
    pkg_rspfile = "$pkg_target_out_dir/${pkg_target_name}.pkgsvr_index.rsp"
    deps += [ "${pkg_label}.pkgsvr_index.rsp" ]
    sources += [ pkg_rspfile ]
    args += [ "@" + rebase_path(pkg_rspfile, 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",
                                       ])
              },
            ]
          }
        }
      }
    }
  }

  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_sources = []
    if (defined(entry.deps)) {
      deps += entry.deps
      foreach(label, entry.deps) {
        entry_sources += get_target_outputs(label)
      }
    }
    if (defined(entry.sources)) {
      entry_sources += entry.sources
    }
    foreach(source, entry_sources) {
      source = rebase_path(source, root_build_dir)
      args += [ "--entry=${entry.target}=${source}" ]
    }
  }
}

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

# 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]),
  ]
}

zircon_tool_action("update.blobs.manifest") {
  testonly = true
  visibility = [ ":amber_publish_blobs" ]
  tool = "merkleroot"
  deps = [
    ":update.sources.manifest",
  ]
  outputs = [
    "$target_out_dir/$target_name",
  ]
  inputs = get_target_outputs(deps[0])
  args = [
    "-m",
    rebase_path(outputs[0]),
    "@" + rebase_path(inputs[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"

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

  script = "manifest.py"
  args = [ "--absolute" ]
  outputs = [
    "$target_out_dir/$target_name",
  ]
  args += [ "--output=" + rebase_path(outputs[0], root_build_dir) ]
  sources = []
  deps = []
  foreach(pkg_label, available_packages) {
    # Find the response file written by package().
    pkg_target_name = get_label_info(pkg_label, "name")
    pkg_target_out_dir = get_label_info(pkg_label, "target_out_dir")
    pkg_rspfile = "$pkg_target_out_dir/${pkg_target_name}.amber_index.rsp"
    deps += [ "${pkg_label}.amber_index.rsp" ]
    sources += [ pkg_rspfile ]
    args += [ "@" + rebase_path(pkg_rspfile, root_build_dir) ]
  }

  system_image_meta_dir =
      get_label_info(":system_image.meta", "target_out_dir") +
      "/system_image.meta"
  system_image_meta_far = system_image_meta_dir + "/meta.far"
  args += [
    "--entry",
    "system_image/0=" + rebase_path(system_image_meta_far, root_build_dir),
  ]
  deps += [ ":system_image.meta" ]

  update_meta_dir =
      get_label_info(":update.meta", "target_out_dir") + "/update.meta"
  update_meta_far = update_meta_dir + "/meta.far"
  args += [
    "--entry",
    "update/0=" + rebase_path(update_meta_far, root_build_dir),
  ]
  deps += [ ":update.meta" ]
}

# 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"

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

  script = "manifest.py"
  args = [ "--absolute" ]
  outputs = [
    "$target_out_dir/$target_name",
  ]
  args += [ "--output=" + rebase_path(outputs[0], root_build_dir) ]
  sources = []
  deps = []
  foreach(pkg_label, available_packages) {
    # Find the response file written by package().
    pkg_target_name = get_label_info(pkg_label, "name")
    pkg_target_out_dir = get_label_info(pkg_label, "target_out_dir")
    pkg_rspfile = "$pkg_target_out_dir/${pkg_target_name}.system_index.rsp"
    deps += [ "${pkg_label}.system_index.rsp" ]
    sources += [ pkg_rspfile ]
    args += [ "@" + rebase_path(pkg_rspfile, root_build_dir) ]
  }

  system_image_meta_dir =
      get_label_info(":system_image.meta", "target_out_dir") +
      "/system_image.meta"
  system_image_blobs_json = system_image_meta_dir + "/blobs.json"
  args += [
    "--entry",
    "system_image/0#monolith=" +
        rebase_path(system_image_blobs_json, root_build_dir),
  ]
  deps += [ ":system_image.meta" ]

  update_meta_dir =
      get_label_info(":update.meta", "target_out_dir") + "/update.meta"
  update_blobs_json = update_meta_dir + "/blobs.json"
  args += [
    "--entry",
    "update/0#monolith=" + rebase_path(update_blobs_json, root_build_dir),
  ]
  deps += [ ":update.meta" ]
}

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),
  ]
}

# The blob.manifest that drives blob.blk is just a flat list of files.
# blob_merkleroot.manifest is a manifest file of "HEXDIGITS=FILENAME"
# lines.  Note that this repeats all the same merkleroot computations
# that blobfs does while building blob.blk, which is wasteful if the
# build is doing both (though the computations can go in parallel and
# filesystem caching should mitigate the cost of reading the files
# twice).  If we're always going to build blob.blk, we could teach
# blobfs to emit this manifest on the side rather than recomputing it
# here.  But if someone tells ninja to build `updates` without `images`,
# then this computation alone should be faster than building blob.blk.
zircon_tool_action("blob_merkleroot.manifest") {
  testonly = true
  visibility = [ ":amber_publish_blobs" ]
  tool = "merkleroot"
  deps = [
    ":blob.manifest",
  ]
  outputs = [
    "$target_out_dir/$target_name",
  ]
  inputs = [
    blob_manifest,
  ]
  args = [
    "-m",
    rebase_path(outputs[0]),
    "@" + rebase_path(blob_manifest),
  ]
}

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

# Sign and publish the package index.
amber_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",
    ":system_snapshot",
  ]
}

###
### Build ID maps.
###

# 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 = [
    ":system_image.manifest",
    ":vdso-ids.txt",
  ]
  sources = [
    "$target_out_dir/vdso-ids.txt",
    system_build_id_map,
  ]

  foreach(pkg_label, available_packages) {
    # Find the ids.txt file written by package().
    manifest = get_label_info(pkg_label, "label_no_toolchain") + ".manifest"
    manifest_target_name = get_label_info(manifest, "name")
    manifest_target_out_dir = get_label_info(manifest, "target_out_dir")
    deps += [ manifest ]
    sources += [ "$manifest_target_out_dir/${manifest_target_name}.ids.txt" ]
  }

  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.
action("vdso-ids.txt") {
  script = "manifest.py"
  sources = [
    "$zircon_build_dir/ids.txt",
  ]
  outputs = [
    "$target_out_dir/vdso-ids.txt",
  ]
  args = [
    "--separator= ",
    "--output=" + rebase_path(outputs[0], root_build_dir),
    "--include-source=*/libzircon.so",
    "--manifest=" + rebase_path(sources[0], root_build_dir),
  ]
}

###
### 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}"
          root = "images"
          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)
        }
      }
      assert(image_sources == [ image_sources[0] ])

      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
}