From 8154d2b22cb56511e95f9b7e2a61a94bfb3e905f Mon Sep 17 00:00:00 2001
From: Joerg Jaspert <joerg@debian.org>
Date: Thu, 29 Oct 2009 10:16:16 +0100
Subject: [PATCH] rsyncable

use --rsyncable for most of our gzip compressions.

For Packages.gz ... 2% bigger, 1/8th of the transfer
For Contents-lala.gz ... ~4% bigger, 1/4th of the transfer

Signed-off-by: Joerg Jaspert <joerg@debian.org>
---
 config/debian/cron.dinstall   | 1 +
 dak/generate_index_diffs.py   | 2 +-
 scripts/debian/mkfilesindices | 8 ++++----
 scripts/debian/mklslar        | 4 ++--
 scripts/debian/mkmaintainers  | 2 +-
 5 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/config/debian/cron.dinstall b/config/debian/cron.dinstall
index 1c9fa5af..96001838 100755
--- a/config/debian/cron.dinstall
+++ b/config/debian/cron.dinstall
@@ -252,6 +252,7 @@ function mpfm() {
 function packages() {
     log "Generating Packages and Sources files"
     cd $configdir
+    GZIP='--rsyncable' ; export GZIP
     apt-ftparchive generate apt.conf
 }
 
diff --git a/dak/generate_index_diffs.py b/dak/generate_index_diffs.py
index 4222c0cf..7e4b0058 100755
--- a/dak/generate_index_diffs.py
+++ b/dak/generate_index_diffs.py
@@ -254,7 +254,7 @@ def genchanges(Options, outdir, oldfile, origfile, maxdiffs = 14):
         if not os.path.isdir(outdir):
             os.mkdir(outdir)
 
-        w = os.popen("diff --ed - %s | gzip -c -9 > %s.gz" %
+        w = os.popen("diff --ed - %s | gzip --rsyncable -c -9 > %s.gz" %
                      (newfile, difffile), "w")
         pipe_file(oldf, w)
         oldf.close()
diff --git a/scripts/debian/mkfilesindices b/scripts/debian/mkfilesindices
index b9d31a02..c16fde6a 100755
--- a/scripts/debian/mkfilesindices
+++ b/scripts/debian/mkfilesindices
@@ -27,7 +27,7 @@ echo "Generating sources list..."
   cd $base/ftp
   find ./dists -maxdepth 1 \! -type d
   find ./dists \! -type d | grep "/source/"
-) | sort -u | gzip -9 > source.list.gz
+) | sort -u | gzip --rsyncable -9 > source.list.gz
 
 echo "Generating arch lists..."
 
@@ -39,7 +39,7 @@ for a in $ARCHES; do
    cd $base/ftp
    find ./dists -maxdepth 1 \! -type d
    find ./dists \! -type d | grep -E "(proposed-updates.*_$a.changes$|/main/disks-$a/|/main/installer-$a/|/Contents-$a|/binary-$a/)"
-  ) | sort -u | gzip -9 > arch-$a.list.gz
+  ) | sort -u | gzip --rsyncable -9 > arch-$a.list.gz
 done
 
 echo "Generating suite lists..."
@@ -62,7 +62,7 @@ printf 'SELECT id, suite_name FROM suite\n' | psql -F' ' -At projectb |
       done
      )
      suite_list $id | tr -d ' ' | sed 's,^/srv/ftp.debian.org/ftp,.,'
-    ) | sort -u | gzip -9 > suite-${suite}.list.gz
+    ) | sort -u | gzip --rsyncable -9 > suite-${suite}.list.gz
   done
 
 echo "Finding everything on the ftp site to generate sundries $(date +"%X")..."
@@ -83,7 +83,7 @@ done
 
 (cd $base/ftp/
 	for dist in sid squeeze; do
-		find ./dists/$dist/main/i18n/ \! -type d | sort -u | gzip -9 > $base/ftp/indices/files/components/translation-$dist.list.gz
+		find ./dists/$dist/main/i18n/ \! -type d | sort -u | gzip --rsyncable -9 > $base/ftp/indices/files/components/translation-$dist.list.gz
 	done
 )
 
diff --git a/scripts/debian/mklslar b/scripts/debian/mklslar
index 19363f1f..231f7f8c 100755
--- a/scripts/debian/mklslar
+++ b/scripts/debian/mklslar
@@ -26,11 +26,11 @@ if [ -r ${filename}.gz ] ; then
   mv -f ${filename}.gz $filename.old.gz
   mv -f .$filename.new $filename
   rm -f $filename.patch.gz
-  zcat $filename.old.gz | diff -u - $filename | gzip -9cfn - >$filename.patch.gz
+  zcat $filename.old.gz | diff -u - $filename | gzip --rsyncable -9cfn - >$filename.patch.gz
   rm -f $filename.old.gz
 else
   mv -f .$filename.new $filename
 fi
 
-gzip -9cfN $filename >$filename.gz
+gzip --rsyncable -9cfN $filename >$filename.gz
 rm -f $filename
diff --git a/scripts/debian/mkmaintainers b/scripts/debian/mkmaintainers
index a0abaa1f..41e8727c 100755
--- a/scripts/debian/mkmaintainers
+++ b/scripts/debian/mkmaintainers
@@ -17,7 +17,7 @@ set -e
 if [ $rc = 1 ] || [ ! -f Maintainers ] ; then
 	echo -n "installing Maintainers ... "
 	mv -f .new-maintainers Maintainers
-	gzip -9v <Maintainers >.new-maintainers.gz
+	gzip --rsyncable -9v <Maintainers >.new-maintainers.gz
 	mv -f .new-maintainers.gz Maintainers.gz
 elif [ $rc = 0 ] ; then
 	echo '(same as before)'
-- 
2.39.2