Coming back to a project after several years, I am struggling with changes to Google closure compilation. I am using a fresh download of the closure library from github, and these tools:
java version "1.8.0_152"
Closure compiler Version: v20200830
With the script quoted below, I get seventeen errors like this, all on closure library files (the only ones I am trying for now):
js/closure-library/closure/goog/net/browsertestchannel.js:20:0: ERROR -[JSC_INVALID_FORWARD_DECLARE] Malformed goog.forwardDeclare 20| goog.forwardDeclare('goog.net.BrowserChannel');
The script:
java -jar closure-compiler-v20200830.jar
--language_in ECMASCRIPT_NEXT
--language_out ECMASCRIPT5
--js js/closure-library/closure/goog/debug/**.js
--js js/closure-library/closure/goog/log/**.js
--js js/closure-library/closure/goog/testing/**.js
--js js/closure-library/closure/goog/testing/events/**.js
--js js/closure-library/closure/goog/testing/ui/**.js
--js js/closure-library/closure/goog/testing/net/**.js
--js js/closure-library/closure/goog/testing/net/rpc/**.js
--js js/closure-library/closure/goog/array/**.js
--js js/closure-library/closure/goog/asserts/**.js
--js js/closure-library/closure/goog/string/**.js
--js js/closure-library/closure/goog/reflect/**.js
--js js/closure-library/closure/goog/userAgent/**.js
--js js/closure-library/closure/goog/dom/**.js
--js js/closure-library/closure/goog/dom/browserrange/**.js
--js js/closure-library/closure/goog/dom/animationframe/**.js
--js js/closure-library/closure/goog/html/**.js
--js js/closure-library/closure/goog/html/sanitizer/**.js
--js js/closure-library/closure/goog/structs/**.js
--js js/closure-library/closure/goog/style/**.js
--js js/closure-library/closure/goog/Promise/**.js
--js js/closure-library/closure/goog/events/**.js
--js js/closure-library/closure/goog/net/**.js
--js js/closure-library/closure/goog/net/rpc/**.js
--js js/closure-library/closure/goog/object/**.js
--js js/closure-library/closure/goog/uri/**.js
--js js/closure-library/closure/goog/functions/**.js
--js js/closure-library/closure/goog/async/**.js
--js js/closure-library/closure/goog/ui/**.js
--js js/closure-library/closure/goog/Timer/**.js
--js js/closure-library/closure/goog/json/**.js
--js js/closure-library/closure/goog/iter/**.js
--js js/closure-library/closure/goog/math/**.js
--js js/closure-library/closure/goog/Disposable/**.js
--js js/closure-library/closure/goog/labs/**.js
--js js/closure-library/closure/goog/dispose/**.js
--js js/closure-library/closure/goog/window/**.js
--js js/closure-library/closure/goog/a11y/**.js
--js js/closure-library/closure/goog/positioning/**.js
--js js/closure-library/closure/goog/date/**.js
--js js/closure-library/closure/goog/spell/**.js
--js js/closure-library/closure/goog/graphics/**.js
--js js/closure-library/closure/goog/fx/**.js
--js js/closure-library/closure/goog/fx/anim/**.js
--js js/closure-library/closure/goog/color/**.js
--js js/closure-library/closure/goog/i18n/**.js
--js js/closure-library/closure/goog/i18n/uChar/**.js
--js js/closure-library/closure/goog/fx/css3/**.js
--js js/closure-library/closure/goog/fs/**.js
--js js/closure-library/closure/goog/fs/url/**.js
--js js/closure-library/closure/goog/fs/blob/**.js
--js js/closure-library/closure/goog/memoize/**.js
--js js/closure-library/closure/goog/pubsub/**.js
--js js/closure-library/closure/goog/storage/**.js
--js js/closure-library/closure/goog/storage/mechanism/**.js
--js js/closure-library/closure/goog/testing/storage/**.js
--js js/closure-library/closure/goog/testing/fs/**.js
--js js/closure-library/closure/goog/crypt/**.js
--js js/closure-library/closure/goog/crypt/hash32/**.js
--js js/closure-library/third_party/closure/goog/mochikit/async/deferred.js
--compilation_level SIMPLE
--warning_level QUIET
--formatting PRETTY_PRINT
--checks_only
--third_party
--js_output_file dist/quickgoog.js
I am guessing that, because these are google closure's own files, I must have some options backwards, but the google is not offering anything on this specific error. Any advice welcome!
