How to downgrade macports software to old revision?

问题

I have an application that uses the software package ffmpeg-devel which is installed via macports.

Last month I updated macports by running port selfupdate and port upgrade outdated which installed a new version of ffmpeg-devel.

My Application building process then started to fail with errors mentioning compatibility. I'm 99% sure that this happens because of the new version of ffmpeg-devel.

I had before ffmpeg-devel @20130205_0, now I have ffmpeg-devel @20130328_0.

I'm not a "guru" and after installing the new version I did remove the old version by mistake, so now I need to install the old ffmpeg-devel revision (based on date 20130328).

How can I do that?

Thanks,

回答1:

Macports does not support this, but there is a workaround.

You can put the old portfile of ffmpeg-devel in a local portfile repository and then install ffmpeg-devel again.

1. Create a local portfile repository: howto
2. Download the old portfile (and possibly other files) from https://svn.macports.org/repository/macports/trunk/dports/multimedia/ffmpeg-devel?p=103000 and put it in the multimedia/ffmpeg-devel directory of your local repository.
3. Run portindex again in your local portfile repository
4. Install ffmpeg-devel with port install ffmpeg-devel

来源：https://stackoverflow.com/questions/16242834/how-to-downgrade-macports-software-to-old-revision