From 9fd5ef959459db4108756c8ee89856584cfd08d8 Mon Sep 17 00:00:00 2001
From: mccallum <mccallum@72102866-910b-0410-8b05-ffd578937521>
Date: Mon, 2 Sep 1996 16:32:39 +0000
Subject: [PATCH] New file.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@1684 72102866-910b-0410-8b05-ffd578937521
---
 make-snap-diff | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100755 make-snap-diff

diff --git a/make-snap-diff b/make-snap-diff
new file mode 100755
index 000000000..de8c56085
--- /dev/null
+++ b/make-snap-diff
@@ -0,0 +1,63 @@
+#!/bin/sh
+
+# The directory in which to find the last snapshot; must be absolute path
+dir=/home/mccallum/gnu/releases
+
+# The email addresses of people to receive mail about the new diff
+diff_recipients=gnustep-dev@prep.ai.mit.edu
+
+# The name of this module
+module=gstep-base
+# A regular expression for the six-digit date string "yymmdd"
+yrptn='[0-9][0-9][0-9][0-9][0-9][0-9]'
+# The pattern for the file containing the diff
+ptn="${module}-${yrptn}"
+dptn="${ptn}-${yrptn}.diff"
+
+# Get the current date
+date=`date +%y%m%d`
+
+# Find date of the last snapshot
+lastsnap=`cd $dir; ls $ptn.tar.gz 2>/dev/null |
+                   sed -e "s/^.*\\(${yrptn}\\)[.a-z]*$/\\1/" |
+                   sort -nr | head -1`
+
+# Find the date of the second-to-last snapshot
+secondlastsnap=`cd $dir; ls $ptn.tar.gz 2>/dev/null |
+                   sed -e "s/^.*\\(${yrptn}\\)[.a-z]*$/\\1/" |
+                   sort -nr | head -2 | tail -1`
+
+# Find the date of the last diff
+lastdiff=`cd $dir; ls $dptn $dptn.gz 2>/dev/null |
+                    sed -e "s/^.*\\(${yrptn}\\)[.a-z]*$/\\1/" |
+                    sort -nr | head -1`
+
+echo Making diff between $secondlastsnap and $lastsnap
+
+# The name of the diff file
+diff="${module}-${secondlastsnap}-${lastsnap}.diff"
+
+if [ -f $dir/$diff ]; then
+  echo $dir/$diff already exists!  Exiting.
+  exit -1
+fi
+echo Making $diff
+
+# Untar the old snapshot
+(cd /tmp ; tar -zvxf $dir/${module}-${secondlastsnap}.tar.gz)
+# Untar the new snapshot
+(cd /tmp ; tar -zvxf $dir/${module}-${lastsnap}.tar.gz)
+# Make the diff
+echo Diffing...
+rm -f /tmp/$diff
+(cd /tmp; diff -u -r ${module}-${secondlastsnap} ${module}-${lastsnap} > $diff)
+# Remove the snapshot dirs
+rm -rf /tmp/${module}-${secondlastsnap} /tmp/${module}-${lastsnap}
+
+if [ -s /tmp/$diff ]; then
+  # Mail a message saying the new diff is available. (Commented out for now)
+  # mail -s $diff < $diff $diff_recipients
+  gzip -9 /tmp/$diff && mv -f /tmp/$diff.gz $dir
+else
+  rm -f /tmp/$diff
+fi