code> command-line option also sets this value.</p>
</dd>
<dt class="hdlist1"><code>GIT_CEILING_DIRECTORIES</code></dt>
<dd>
<p>This should be a colon-separated list of absolute paths.  If
set, it is a list of directories that Git should not chdir up
into while looking for a repository directory (useful for
excluding slow-loading network directories).  It will not
exclude the current working directory or a GIT_DIR set on the
command line or in the environment.  Normally, Git has to read
the entries in this 