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#!/bin/sh
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# PRE-LOCK HOOK
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#
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# The pre-lock hook is invoked before an exclusive lock is
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# created. Subversion runs this hook by invoking a program
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# (script, executable, binary, etc.) named 'pre-lock' (for which
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# this file is a template), with the following ordered arguments:
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#
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# [1] REPOS-PATH (the path to this repository)
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# [2] PATH (the path in the repository about to be locked)
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# [3] USER (the user creating the lock)
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#
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# The default working directory for the invocation is undefined, so
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# the program should set one explicitly if it cares.
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#
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# If the hook program exits with success, the lock is created; but
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# if it exits with failure (non-zero), the lock action is aborted
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# and STDERR is returned to the client.
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# On a Unix system, the normal procedure is to have 'pre-lock'
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# invoke other programs to do the real work, though it may do the
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# work itself too.
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#
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# Note that 'pre-lock' must be executable by the user(s) who will
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# invoke it (typically the user httpd runs as), and that user must
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# have filesystem-level permission to access the repository.
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#
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# On a Windows system, you should name the hook program
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# 'pre-lock.bat' or 'pre-lock.exe',
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# but the basic idea is the same.
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#
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# Here is an example hook script, for a Unix /bin/sh interpreter:
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REPOS="$1"
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PATH="$2"
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USER="$3"
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# If a lock exists and is owned by a different person, don't allow it
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# to be broken.
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# (Maybe this script could send email to the to the lock owner?)
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SVNLOOK=/usr/local/bin/svnlook
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GREP=/bin/grep
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SED=/bin/sed
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LOCK_OWNER=`$SVNLOOK lock "$REPOS" "$PATH" | \
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$GREP '^Owner:' | $SED 's/Owner: //'`
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# If we get no result from svnlook, there's no lock, allow the lock to
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# happen:
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if [ "$LOCK_OWNER" == "" ]; then
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exit 0
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fi
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# If the person locking matches the lock's owner, allow the lock to
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# happen:
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if [ "$LOCK_OWNER" == "$USER" ]; then
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exit 0
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fi
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# Otherwise, we've got an owner mismatch, so return failure:
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echo "Error: $PATH already locked by ${LOCK_OWNER}." 1>&2
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exit 1
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