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Date: Tue, 2 Feb 2016 13:01:39 +0000 (UTC)
From: "ASF GitHub Bot (JIRA)" <jira@apache.org>
To: issues@cordova.apache.org
Message-ID: <JIRA.12914763.1448006462000.276107.1454418099796@Atlassian.JIRA>
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Subject: [jira] [Commented] (CB-10052) Improve superspawn to allow to handle
 spawned process io streams
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    [ https://issues.apache.org/jira/browse/CB-10052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15128210#comment-15128210 ] 

ASF GitHub Bot commented on CB-10052:
-------------------------------------

Github user vladimir-kotikov commented on the pull request:

    https://github.com/apache/cordova-lib/pull/369#issuecomment-178564407
  
    @dblotsky, is this good to go?


> Improve superspawn to allow to handle spawned process io streams
> ----------------------------------------------------------------
>
>                 Key: CB-10052
>                 URL: https://issues.apache.org/jira/browse/CB-10052
>             Project: Apache Cordova
>          Issue Type: Improvement
>          Components: CordovaCommon
>    Affects Versions: 1.0.0
>            Reporter: Vladimir Kotikov
>            Assignee: Vladimir Kotikov
>             Fix For: 1.1.0
>
>
> Sometimes it is useful to process spawned process stdout and stderr in some way before out this to console. The current implementation of superspawn doesn't give a way to do this. One of the cases when this could be helpful - CB-9971 (see https://github.com/apache/cordova-android/pull/240 for some discussion).
> The proposed approach is:
> 1. Add ability to accept any valid stdio configuration, just like the original child_process.spawn does (https://nodejs.org/api/child_process.html#child_process_options_stdio)
> 2. Give a way to caller to listen to stdout and stderr events. This might be implemented as resultant promise progress notification:
> {code:JavaScript}
> spawn('mycommand', [], {stdio: 'pipe'})
> .progress(function (stdio){
>     if (stdio.stderr) {
>         console.error(stdio.stderr);
>     }
> })
> .then(function(result){
>     // do other stuff
> })
> {code}
> Another option is to return na object that implements both EventEmitter and Promise interfaces, so anybody might subscribe to its events.


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