From 917544546fd09faeb43497d20afcc83900aeb3ed Mon Sep 17 00:00:00 2001
From: Ian Wienand <iwienand@redhat.com>
Date: Tue, 22 Jun 2021 09:33:56 +1000
Subject: [PATCH] centos-mirror: add dry run mode

Add a dry-run flag and abstract the rsync command to make for easier
testing if modifying the copy flags.

Change-Id: Ie658b60257b94436b1eda0cddf6deb639a87d659
---
 .../mirror-update/files/centos-mirror-update  | 22 ++++++++++++++-----
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/playbooks/roles/mirror-update/files/centos-mirror-update b/playbooks/roles/mirror-update/files/centos-mirror-update
index 2f11ad87ce..519017b33c 100755
--- a/playbooks/roles/mirror-update/files/centos-mirror-update
+++ b/playbooks/roles/mirror-update/files/centos-mirror-update
@@ -24,6 +24,14 @@ else
     TIMEOUT="timeout -k 2m 30m"
 fi
 
+_DRY_RUN=''
+if [[ ${DRY_RUN:-0} -eq 1 ]]; then
+    echo "Dry run only"
+    _DRY_RUN='--dry-run'
+fi
+
+RSYNC="rsync ${_DRY_RUN} -rltvz"
+
 BASE="/afs/.openstack.org/mirror/centos"
 K5START="k5start -t -f /etc/centos.keytab service/centos-mirror -- $TIMEOUT"
 
@@ -38,7 +46,7 @@ if ! [ -f $BASE/8-stream ]; then
 fi
 date --iso-8601=ns
 echo "Running Centos 8-stream rsync..."
-$K5START rsync -rltvz \
+$K5START ${RSYNC} \
     --delete \
     --delete-excluded \
     --exclude="isos" \
@@ -56,7 +64,7 @@ if ! [ -f $BASE/8 ]; then
 fi
 date --iso-8601=ns
 echo "Running Centos 8 rsync..."
-$K5START rsync -rltvz \
+$K5START ${RSYNC} \
     --delete \
     --delete-excluded \
     --exclude="isos" \
@@ -94,7 +102,7 @@ for REPO in $REPOS; do
 
     date --iso-8601=ns
     echo "Running rsync..."
-    $K5START rsync -rltvz \
+    $K5START ${RSYNC} \
     --delete \
     --delete-excluded \
     --exclude="atomic" \
@@ -110,9 +118,11 @@ for REPO in $REPOS; do
     # TODO(pabelanger): Validate rsync process
 done
 
-date --iso-8601=ns | $K5START tee $BASE/timestamp.txt
-echo "rsync completed successfully, running vos release."
-vos_release $MIRROR_VOLUME
+if [[ ${DRY_RUN:-0} -ne 1 ]]; then
+    date --iso-8601=ns | $K5START tee $BASE/timestamp.txt
+    echo "rsync completed successfully, running vos release."
+    vos_release $MIRROR_VOLUME
+fi
 
 date --iso-8601=ns
 echo "Done."