Oct 23, 2008

How to Disable Steal Lock in Subversion

In Subversion, you can easily steal the lock that other user lock it. By using hook script, you can disallow user to do so. Just edit the pre-lock script as following

pre-lock.bat
The following is the content of pre-lock.bat which will work on Windows environment. Just copy the content and put it under the hook folder of your Subversion repository

@ECHO OFF
:: Set all parameters. Even though most are not used, in case you want to add
:: changes that allow, for example, editing of the author or addition of log messages.
set repository=%1
set rev_path=%2
set userName=%3

:: If a lock exists and is owned by a different person, don't allow it
:: to be stolen (e.g., with 'svn lock --force ...').

FOR /F "delims=: tokens=1*" %%a IN ('svnlook lock "%repository%" "%rev_path%"') DO if %%a==Owner (set LOCK_OWNER=%%b)

:: If we get no result from svnlook, there's no lock, allow the lock to
:: happen:
if "%LOCK_OWNER%"=="" (
exit /b 0
)

:: If the person locking matches the lock's owner, allow the lock to
:: happen:
if "%LOCK_OWNER%" = " %username%" (
exit /b 0
)

:: Otherwise, we've got an owner mismatch, so return failure:
echo "Error: %rev_path% already locked by %LOCK_OWNER%." >&2
exit /b 1
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