From 1433976802baf67c89038d699d0a50522bc138cc Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Wed, 13 Jun 2018 16:22:08 +0200
Subject: lib/common-functions: recompress_gz() new to recompress databases
 before sending, so they are transferred faster by rsync

---
 lib/common-functions | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'lib/common-functions')

diff --git a/lib/common-functions b/lib/common-functions
index d8da4a7..aa78ebd 100755
--- a/lib/common-functions
+++ b/lib/common-functions
@@ -758,3 +758,23 @@ verbose_flock() {
     return ${err}
   }
 }
+
+# recompress_gz $tmp_dir $file1.gz $file2.gz ...
+# recompress the given file(s) to make them rsync friendly
+recompress_gz() {
+  tmp_file=$(
+    mktemp "$1/recompress_gz.XXXXXXXX)"
+  )
+  shift
+  local file
+  for file in "$@"; do
+    if [ ! -f "${file}" ]; then
+      continue
+    fi
+    mv "${file}" "${tmp_file}"
+    zcat "${tmp_file}" | \
+      gzip --best --rsyncable > \
+      "${file}"
+  done
+  rm "${tmp_file}"
+}
-- 
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