lib/common-functions: recompress_gz() new to recompress databases before sending, so they are transferred faster by rsync

1 files changed, 20 insertions, 0 deletions

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}"
+}