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POCan Mercurial do a reverse-patch?
 

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  1. POCan Mercurial do a reverse-patch?
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    <p>Scenario: I've "inherited" a program, kept under Mercurial, that only works on my system with specific tweaks to certain files that are checked in. I <em>do not</em> want to check these tweaks in.</p> <p>My most recent solution to this is to create a mercurial patch file (hg diff > patchfile) containing these tweaks; when I need to check in my changes, I'll just reverse-apply the patch, commit, and re-apply the patch. (If I had full control of the source, I'd just move all these little tweaks to a single configuration file that isn't under version control, putting a "sample" config file under version control)</p> <p>Unfortunately, it seems that while the GNU <code>patch</code> command supports the <code>--reverse</code> flag, it does not support hg's multi-file diff format as a single patch file (or maybe it does, and I just don't know the switches for it?). OTOH, hg has its own <code>patch</code> command that can apply the diff, but that doesn't support any kind of <code>reverse</code> flag.</p> <p>So my question is twofold:</p> <ol> <li>How <em>should</em> this be done in mercurial? Surely hanging on to a "tweak patch" isn't the only way to handle this situation. Maybe mercurial has a plugin or something built in for such temporary, uncommittable changes.</li> <li>Aside from how things <em>should</em> be done, is there any way to reverse-apply such a mercurial diff-patch to a mercurial repo like this? There are other situations where such functionality would be useful.</li> </ol>
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