version control - Ensuring a merge between branches happens in one direction -

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this morning discovered co-worker had merged wrong way between 2 branches in mercurial --we have ver5 , ver6 branch, files in ver6. there way (a serverside hook probably) enforce children of ver5 node ver5?

rather post twice, answer "mercurial: allow merge release branch default one, not vice versa" help? https://stackoverflow.com/a/19926324/1025457


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