Download recipe for Cisco AnyConnect, where the expectation is that the Cisco AnyConnect disk image is available for download from a URL provided in an AutoPkg override

CiscoAnyConnect.download.recipe

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Description</key>
	<string>Downloads a Cisco AnyConnect package from a specified URL.</string>
	<key>Identifier</key>
	<string>com.company.download.CiscoAnyConnect</string>
	<key>Input</key>
	<dict>
		<key>NAME</key>
		<string>Cisco AnyConnect Secure Mobility Client</string>
        <key>VENDOR</key>
        <string>Cisco</string>
        <key>DOWNLOAD_URL</key>
        <string>Put_download_URL_into_AutoPkg_recipe_override</string>
	</dict>
	<key>MinimumVersion</key>
	<string>1.0.0</string>
	<key>Process</key>
	<array>
		<dict>
			<key>Arguments</key>
			<dict>
				<key>predicate</key>
				<string>DOWNLOAD_URL == "Put_download_URL_into_AutoPkg_recipe_override"</string>
			</dict>
			<key>Processor</key>
			<string>StopProcessingIf</string>
		</dict>
		<dict>
			<key>Processor</key>
			<string>URLDownloader</string>
			<key>Arguments</key>
			<dict>
				<key>url</key>
				<string>%DOWNLOAD_URL%</string>
				<key>request_headers</key>
				<dict>
					<key>user-agent</key>
					<string>%DOWNLOAD_USERAGENT%</string>
					<key>referer</key>
					<string>%DOWNLOAD_REFERER%</string>
				</dict>
			</dict>
		</dict>
 		<dict>
			<key>Processor</key>
			<string>FlatPkgUnpacker</string>
			<key>Arguments</key>
			<dict>
				<key>flat_pkg_path</key>
				<string>%pathname%/AnyConnect.pkg</string>
				<key>destination_path</key>
				<string>%RECIPE_CACHE_DIR%/%VENDOR%/unpack</string>
				<key>purge_destination</key>
				<true/>
			</dict>
		</dict>
 		<dict>
			<key>Processor</key>
			<string>PkgPayloadUnpacker</string>
			<key>Arguments</key>
			<dict>
				<key>pkg_payload_path</key>
				<string>%RECIPE_CACHE_DIR%/%VENDOR%/unpack/vpn_module.pkg/Payload</string>
				<key>destination_path</key>
				<string>%RECIPE_CACHE_DIR%/%VENDOR%/vpn_module_payload</string>
				<key>purge_destination</key>
				<true/>
			</dict>
		</dict>
		<dict>
			<key>Processor</key>
			<string>Versioner</string>
			<key>Arguments</key>
			<dict>
				<key>input_plist_path</key>
				<string>%RECIPE_CACHE_DIR%/%VENDOR%/vpn_module_payload/Applications/Cisco/Cisco AnyConnect Secure Mobility Client.app/Contents/Info.plist</string>
				<key>plist_version_key</key>
				<string>CFBundleShortVersionString</string>
			</dict>
		</dict>
		<dict>
		<key>Processor</key>
		<string>EndOfCheckPhase</string>
		</dict>
	</array>
</dict>
</plist>