Tim Barham created CB-11985:
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             Summary: Cordova hits internet unnecessarily when getting cached 
platform or plugin
                 Key: CB-11985
                 URL: https://issues.apache.org/jira/browse/CB-11985
             Project: Apache Cordova
          Issue Type: Improvement
          Components: CordovaLib
    Affects Versions: 6.3.1
            Reporter: Tim Barham
            Assignee: Tim Barham


In you are disconnected from the internet and try to add a platform or plugin 
that has previously been cached, Cordova eventually successfully installs the 
platform/plugin, but only after a very long wait.

We could check for the existence of the cached platform/plugin before calling 
{{npm cache add}}. This would mean an instant return when not connected to the 
internet.

Note that this will only help if we are adding a specific version - when a 
version range is specified, we need to hit the internet anyway to find the 
matching version.

Background: First time build failures in Cordova tools in Visual Studio are 
primarily due to {{npm}} failures. Therefore we are working to avoid any 
requirement for {{npm}}} to hit the internet in simple build scenarios. This 
includes pre-installing cached versions of certain platforms and plugins. But 
we only get the full benefit if Cordova uses these cached versions if it finds 
them, without calling {{npm cache add}}.



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