Pavel Lyalyakin <pavel.lyalya...@visualsvn.com> writes: > [[ > Before Subversion calls a hook script, it removes all variables -- > including $PATH on Unix, and %PATH% on Windows -- from the > environment. Therefore, your script can only run another program if > you spell out that program's absolute name. > ]] > > Is this statement true? > > I've just tested this with Windows 7 64bit and Apache Subversion > 1.7.8: NO environment variables get removed.
It's certainly true for Unix platforms. Subversion first calls apr_procattr_cmdtype_set setting cmd=APR_PROGRAM and then calls apr_proc_create passing env=NULL. APR says that APR_PROGRAM doesn't copy the environment. On Unix the combination of APR_PROGRAM and env=NULL causes an empty array to be passed to execve. That gives an empty environment. On Windows, as far as I can tell by looking at the code, it causes a null pointer to be passed to CreateProcessW. The Microsoft documentation says that will cause the environment to be inherited. So it seems that there is a bug in apr_proc_create on Windows. Subversion might be able to work around this bug by explicitly passing an non-null, empty environment to apr_proc_create. -- Certified & Supported Apache Subversion Downloads: http://www.wandisco.com/subversion/download
