Heroku ExecJS::RuntimeError: SyntaxError:预期名称

Question

在推到Heroku时，我遇到了以下错误。前几天工作得很好。在我试图推动的提交上没有重大的配置更改。我很困惑如何解决这个问题。Rails 5.1应用程序使用以下构建包：

1. heroku/nodejs
2. heroku/ruby

我在利用网络包装机和纱线。我认为这与此有关，但很难找到更多的信息。

remote: -----> Preparing app for Rails asset pipeline
remote:        Running: rake assets:precompile
remote:        yarn install v0.27.5
remote:        [1/4] Resolving packages...
remote:        [2/4] Fetching packages...
remote:        warning fsevents@1.1.2: The platform "linux" is incompatible with this module.
remote:        info "fsevents@1.1.2" is an optional dependency and failed compatibility check. Excluding it from installation.
remote:        [3/4] Linking dependencies...
remote:        [4/4] Building fresh packages...
remote:        Done in 6.62s.
remote:        rake aborted!
remote:        ExecJS::RuntimeError: SyntaxError: Name expected
remote:        JS_Parse_Error.get ((execjs):3538:621)
remote:        (execjs):4060:47
remote:        (execjs):1:102
remote:        Object.<anonymous> ((execjs):1:120)
remote:        Module._compile (module.js:571:32)
remote:        Object.Module._extensions..js (module.js:580:10)
remote:        Module.load (module.js:488:32)
remote:        tryModuleLoad (module.js:447:12)
remote:        Function.Module._load (module.js:439:3)
remote:        Module.runMain (module.js:605:10)
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/execjs-2.7.0/lib/execjs/external_runtime.rb:39:in `exec'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/execjs-2.7.0/lib/execjs/external_runtime.rb:21:in `eval'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/execjs-2.7.0/lib/execjs/external_runtime.rb:46:in `call'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/uglifier-3.2.0/lib/uglifier.rb:195:in `run_uglifyjs'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/uglifier-3.2.0/lib/uglifier.rb:157:in `compile'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/uglifier_compressor.rb:53:in `call'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/uglifier_compressor.rb:28:in `call'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:75:in `call_processor'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:57:in `block in call_processors'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in `reverse_each'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in `call_processors'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:134:in `load_from_unloaded'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:60:in `block in load'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:317:in `fetch_asset_from_dependency_cache'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/loader.rb:44:in `load'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:20:in `block in initialize'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:47:in `load'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/base.rb:66:in `find_asset'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/base.rb:73:in `find_all_linked_assets'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:142:in `block in find'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:114:in `block (2 levels) in logical_paths'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:228:in `block in stat_tree'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:212:in `block in stat_directory'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:209:in `each'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:209:in `stat_directory'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:227:in `stat_tree'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:105:in `each'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:105:in `block in logical_paths'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:104:in `each'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:104:in `logical_paths'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:140:in `find'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:185:in `compile'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/task.rb:68:in `block (3 levels) in define'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-3.7.1/lib/rake/sprocketstask.rb:147:in `with_logger'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/sprockets-rails-3.2.0/lib/sprockets/rails/task.rb:67:in `block (2 levels) in define'
remote:        /tmp/build_d7b1075d17c0c421422ebdbfc017919a/vendor/bundle/ruby/2.4.0/gems/rake-12.0.0/exe/rake:27:in `<top (required)>'
remote:        Tasks: TOP => assets:precompile
remote:        (See full trace by running task with --trace)
remote:  !
remote:  !     Precompiling assets failed.
remote:  !
remote:  !     Push rejected, failed to compile Ruby app.
remote: 
remote:  !     Push failed
remote: Verifying deploy...
remote: 
remote: !   Push rejected ....

经过进一步的研究，发现了与乌贼有关的问题。当我复制第三方库datepicker.js的内容并将其粘贴到Uglifier中时，我会得到相同的错误：

> Uglifier.compile( <<< file contents >>> )
ExecJS::RuntimeError: SyntaxError: Name expected
from JS_Parse_Error.get ((execjs):3538:621)

Answer 1

我发现，这个问题的原因与Uglifier中的一个可能的错误有关，当它试图处理一个名为datepicker.js (datepicker.js)的第三方库时。我打开了一个关于“丑小怪”的问题：https://github.com/lautis/uglifier/issues/124

我想出了一个解决办法，在我的app/assets/javascripts/application.js文件中包含了精简的javascripts文件，如下所示。

//= require js-datepicker/datepicker.min

Answer 2

我相信这个问题与您的yarn服务器上的linux安装有关。

实际上，您可以在yarn github存储库中找到该文件。

纱线喷口.1.1.2

此外，您还可以找到类似的问题，在这些问题中，纱线的heroku安装会因同样的错误warning fsevents@1.1.2: The platform "linux" is incompatible with this module.而失败。

错误是相同的警告fsevents@1.1.2:平台"linux“与此模块不兼容。info "fsevents@1.1.2“是一个可选的依赖项，并且兼容性检查失败。将其排除在安装之外.

Heroku未能在linux平台上安装纱线。

在Rails 5.1中添加了纱线，我也必须排除这个错误，我也在这方面打开了一个问题。

我的问题正在开发中，因为我有Linux 。可能在开发中安装纱线使我在生产中没有遇到这个问题。

不过，在用node.js进行开发时安装它仍然有问题，所以我最终使用了npm命令npm install yarn -g，您可以使用heroku run npm install yarn -g在heroku服务器上运行它，或者可以使用nodejs，纱线安装指南是可以听到的。

https://yarnpkg.com/en/docs/install

此外，这是一个非常相似的问题列表的查询，您可以阅读这些帖子，并可能找到解决问题的方法。这个问题不是来自rails，而是来自其他使用nodejs的框架。

在本例中，您还安装了带有nodejs的纱线，所以问题可能与nodejs有关。

b&ia=qa

FSEvents API的解释

这似乎是fsevents的依赖问题。您的操作系统Arch Linux不支持它。如果您转到Strongloop的fsevents Github页面，您将在他们的自述中看到这一点。 本机访问OS X FSEvents in Node.js OS中的FSEvents API允许应用程序注册对给定目录树的更改通知。它是kqueue的一个非常快速和轻量级的替代方案。所以，我想说这不是亚恩的问题。其他错误可能是以前失败的结果。

阅读更多

https://github.com/yarnpkg/yarn/issues/2142

无论如何，他们应该用这个方法解决这个问题。

https://github.com/yarnpkg/yarn/pull/2279

如果你不能解决这个问题，也许你可以打开一个问题。