NBash

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#!/bin/sh
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# An example hook script to verify what is about to be pushed.  Called by "git
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# push" after it has checked the remote status, but before anything has been
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# pushed.  If this script exits with a non-zero status nothing will be pushed.
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#
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# This hook is called with the following parameters:
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#
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# $1 -- Name of the remote to which the push is being done
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# $2 -- URL to which the push is being done
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#
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# If pushing without using a named remote those arguments will be equal.
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#
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# Information about the commits which are being pushed is supplied as lines to
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# the standard input in the form:
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#
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#   <local ref> <local oid> <remote ref> <remote oid>
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#
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# This sample shows how to prevent push of commits where the log message starts
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# with "WIP" (work in progress).
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remote="$1"
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url="$2"
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zero=$(git hash-object --stdin </dev/null | tr '[0-9a-f]' '0')
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while read local_ref local_oid remote_ref remote_oid
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do
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	if test "$local_oid" = "$zero"
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	then
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		# Handle delete
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		:
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	else
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		if test "$remote_oid" = "$zero"
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		then
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			# New branch, examine all commits
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			range="$local_oid"
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		else
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			# Update to existing branch, examine new commits
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			range="$remote_oid..$local_oid"
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		fi
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		# Check for WIP commit
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		commit=$(git rev-list -n 1 --grep '^WIP' "$range")
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		if test -n "$commit"
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		then
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			echo >&2 "Found WIP commit in $local_ref, not pushing"
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			exit 1
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		fi
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	fi
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done
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exit 0 
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