reverse sense of return value from python hooks. old scheme (False/None/0/'' == fail) made coding style unnatural, did not allow use of mercurial commands as hooks. new scheme (False/None/0 == pass) is pythonic, does not require peculiar "return True" at ends of hooks, allows hooks like this: [hooks] # update working dir after push into this repo changegroup.update = python:mercurial.commands.update

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#!/bin/sh

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set -e

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mkdir test

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cd test

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echo foo>foo

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hg init

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hg addremove

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hg commit -m "1"

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hg verify

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hg clone . ../branch

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cd ../branch

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hg co

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echo bar>>foo

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hg commit -m "2"

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cd ../test

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hg pull ../branch

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hg verify

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hg co

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cat foo

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hg manifest