Jason Ginchereau created CB-11117:
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Summary: 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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