[COGITO PATCH] Small, simple and obvious cleanups (are they wanted at this stage?)

["C. Cooke" <ccooke@gkhs.net>]

This is a simple example - giving a nice error if you're in the wrong
directory.

Is this sort of patch wanted? If so, I'm sure I can spare the time to
look into some polishing.

------------------------------
Add some sanity checking - does $_git exist, and is it writable.

---
commit 06afdeefff9fe02cd2a67f223e687646cacf736f
tree cebc55541b89b5370335fc172814feb48456dc85
parent 20e473c9afd8b5d2d549b0e7881473600beb9c37
author C. Cooke <ccooke@slab.earth.gkhs.net> Wed, 01 Jun 2005 20:03:46 +0100
committer C. Cooke <ccooke@slab.earth.gkhs.net> Wed, 01 Jun 2005
20:03:46 +0100

 cg-Xnormid |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/cg-Xnormid b/cg-Xnormid
--- a/cg-Xnormid
+++ b/cg-Xnormid
@@ -16,6 +16,15 @@

 id="$1"

+# A little sanity checking.
+if [ ! -d "$_git" ]; then
+       echo "There is no Git repository here ($_git not found)" >&2
+       exit 1
+elif [ ! -r "$_git" ] || [ ! -x "$_git" ]; then
+       echo "You do not have permission to access this git repository" >&2
+       exit 1
+fi
+
 if [ ! "$id" ] || [ "$id" = "this" ] || [ "$id" = "HEAD" ]; then
        read id < "$_git/HEAD"


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