def get_arch_srcs(prebuilt, arch):
            """Returns build rule for arch specific srcs.

            e.g.,
                arch: {
                    arm: {
                        srcs: ["..."]
                    },
                    arm64: {
                        srcs: ["..."]
                    },
                }

            Args:
              prebuilt: string, name of prebuilt object
              arch: string, VNDK snapshot arch (e.g. 'arm64')
            """
            arch_srcs = '{ind}arch: {{\n'.format(ind=self.INDENT)
            src_paths = utils.find(src_root, [prebuilt])
            # filter out paths under 'binder32' subdirectory
            src_paths = filter(lambda src: not src.startswith(utils.BINDER32),
                               src_paths)

            for src in sorted(src_paths):
                arch_srcs += ('{ind}{ind}{arch}: {{\n'
                              '{ind}{ind}{ind}srcs: ["{src}"],\n'
                              '{ind}{ind}}},\n'.format(
                                  ind=self.INDENT,
                                  arch=utils.prebuilt_arch_from_path(
                                      os.path.join(arch, src)),
                                  src=src))
            arch_srcs += '{ind}}},\n'.format(ind=self.INDENT)
            return arch_srcs
        def get_arch_srcs(prebuilt, arch):
            """Returns build rule for arch specific srcs.

            e.g.,
                arch: {
                    arm: {
                        srcs: ["..."]
                    },
                    arm64: {
                        srcs: ["..."]
                    },
                }

            Args:
              prebuilt: string, name of prebuilt object
              arch: string, VNDK snapshot arch (e.g. 'arm64')
            """
            arch_srcs = '{ind}arch: {{\n'.format(ind=self.INDENT)
            src_paths = utils.find(src_root, [prebuilt])
            # filter out paths under 'binder32' subdirectory
            src_paths = filter(lambda src: not src.startswith(utils.BINDER32),
                               src_paths)

            for src in sorted(src_paths):
                arch_srcs += ('{ind}{ind}{arch}: {{\n'
                              '{ind}{ind}{ind}srcs: ["{src}"],\n'
                              '{ind}{ind}}},\n'.format(
                                  ind=self.INDENT,
                                  arch=utils.prebuilt_arch_from_path(
                                      os.path.join(arch, src)),
                                  src=src))
            arch_srcs += '{ind}}},\n'.format(ind=self.INDENT)
            return arch_srcs
        def get_arch_props(prebuilt, arch):
            """Returns build rule for arch specific srcs.

            e.g.,
                arch: {
                    arm: {
                        export_include_dirs: ["..."],
                        export_system_include_dirs: ["..."],
                        export_flags: ["..."],
                        relative_install_path: "...",
                        srcs: ["..."]
                    },
                    arm64: {
                        export_include_dirs: ["..."],
                        export_system_include_dirs: ["..."],
                        export_flags: ["..."],
                        relative_install_path: "...",
                        srcs: ["..."]
                    },
                }

            Args:
              prebuilt: string, name of prebuilt object
              arch: string, VNDK snapshot arch (e.g. 'arm64')
            """
            arch_props = '{ind}arch: {{\n'.format(ind=self.INDENT)
            src_paths = utils.find(src_root, [prebuilt])
            # filter out paths under 'binder32' subdirectory
            src_paths = filter(lambda src: not src.startswith(utils.BINDER32),
                               src_paths)

            def list_to_prop_value(l, name):
                if len(l) == 0:
                    return ''
                dirs = ',\n{ind}{ind}{ind}{ind}'.format(ind=self.INDENT).join(
                    ['"%s"' % d for d in l])
                return ('{ind}{ind}{ind}{name}: [\n'
                        '{ind}{ind}{ind}{ind}{dirs},\n'
                        '{ind}{ind}{ind}],\n'.format(ind=self.INDENT,
                                                     dirs=dirs,
                                                     name=name))

            for src in sorted(src_paths):
                include_dirs = ''
                system_include_dirs = ''
                flags = ''
                relative_install_path = ''
                prop_path = os.path.join(src_root, src + '.json')
                props = dict()
                try:
                    with open(prop_path, 'r') as f:
                        props = json.loads(f.read())
                    os.unlink(prop_path)
                except:
                    # TODO(b/70312118): Parse from soong build system
                    if prebuilt == '*****@*****.**':
                        props['RelativeInstallPath'] = 'hw'
                if 'ExportedDirs' in props:
                    l = ['include/%s' % d for d in props['ExportedDirs']]
                    include_dirs = list_to_prop_value(l, 'export_include_dirs')
                if 'ExportedSystemDirs' in props:
                    l = ['include/%s' % d for d in props['ExportedSystemDirs']]
                    system_include_dirs = list_to_prop_value(
                        l, 'export_system_include_dirs')
                if 'ExportedFlags' in props:
                    flags = list_to_prop_value(props['ExportedFlags'],
                                               'export_flags')
                if 'RelativeInstallPath' in props:
                    relative_install_path = (
                        '{ind}{ind}{ind}'
                        'relative_install_path: "{path}",\n').format(
                            ind=self.INDENT, path=props['RelativeInstallPath'])

                arch_props += ('{ind}{ind}{arch}: {{\n'
                               '{include_dirs}'
                               '{system_include_dirs}'
                               '{flags}'
                               '{relative_install_path}'
                               '{ind}{ind}{ind}srcs: ["{src}"],\n'
                               '{ind}{ind}}},\n').format(
                                   ind=self.INDENT,
                                   arch=utils.prebuilt_arch_from_path(
                                       os.path.join(arch, src)),
                                   include_dirs=include_dirs,
                                   system_include_dirs=system_include_dirs,
                                   flags=flags,
                                   relative_install_path=relative_install_path,
                                   src=src)
            arch_props += '{ind}}},\n'.format(ind=self.INDENT)
            return arch_props