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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CB-11117) Preparing platforms should skip copying files which haven't changed
Date Tue, 03 May 2016 18:18:12 GMT

    [ https://issues.apache.org/jira/browse/CB-11117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15269271#comment-15269271
] 

ASF GitHub Bot commented on CB-11117:
-------------------------------------

Github user jasongin commented on the pull request:

    https://github.com/apache/cordova-lib/pull/429#issuecomment-216618237
  
    BTW, I didn't mention above the reason I had to abandon the approach of checking for exactly-equal
modified times. The problem is the OS X filesystem doesn't support sub-second timestamps,
so it would be possible for a file to be modified again in the same second while still appearing
to have the same timestamp.


> Preparing platforms should skip copying files which haven't changed
> -------------------------------------------------------------------
>
>                 Key: CB-11117
>                 URL: https://issues.apache.org/jira/browse/CB-11117
>             Project: Apache Cordova
>          Issue Type: Improvement
>          Components: Android, iOS, Windows
>            Reporter: Jason Ginchereau
>            Assignee: Jason Ginchereau
>
> Many cordova CLI commands include a "prepare" operation, including 'cordova build', 'cordova
run', 'cordova plugin add', and more. Every time each of those commands runs, the target platform
is "prepared", which involves copying all files from the [<project>/www, <project>/platforms/<platform>/platform_www,
<project>/merges/<platform>] to the platform's target www folder, as well as copying
a bunch of icons and splash screens to platform-specific locations.
> For the very first prepare of a platform, all that file copying is necessary. But most
of the time after that most of the files being copied have not changed and therefore don't
really need to be copied again. So the typical developer inner loop (edit a few source files,
build and run the app, repeat) is a lot slower than it could be for a Cordova project, especially
one that includes a significant number of source files or resources.
> Instead, Cordova should be smart enough to skip copying of files that haven't changed,
based on their last-modified timestamp. (But also there should still be a way to force a clean/full/non-incremental
build if desired.)



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