From 5ca9ecfe2afdb2304c9a21fe8fefb8316f036bb7 Mon Sep 17 00:00:00 2001
From: Nick Stokoe <git.wu-lee@noodlefactory.co.uk>
Date: Tue, 27 May 2025 18:18:06 +0100
Subject: [PATCH] templates/docker-compose/borgmatic/ - avoid losing STDERR
 lines

use stdbuf to change the buffereing mode to be linewise
---
 templates/docker-compose/borgmatic/Dockerfile | 7 +++++++
 templates/docker-compose/borgmatic/backup.sh  | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/templates/docker-compose/borgmatic/Dockerfile b/templates/docker-compose/borgmatic/Dockerfile
index 5af8ab1..b39d1c5 100644
--- a/templates/docker-compose/borgmatic/Dockerfile
+++ b/templates/docker-compose/borgmatic/Dockerfile
@@ -1,4 +1,11 @@
 FROM b3vis/borgmatic:latest-msmtp
 
+# Install stdbuf, used by backup.sh
+RUN \
+  echo "* Installing Runtime Packages" \
+    && apk upgrade --no-cache \
+  && echo "* Installing Runtime Packages" \
+    && apk add -U --no-cache \
+      coreutils
 COPY --chmod=755 backup.sh /backup.sh
 
diff --git a/templates/docker-compose/borgmatic/backup.sh b/templates/docker-compose/borgmatic/backup.sh
index 102a781..06a426d 100755
--- a/templates/docker-compose/borgmatic/backup.sh
+++ b/templates/docker-compose/borgmatic/backup.sh
@@ -31,7 +31,7 @@ indent() {
 log() {
     # Adapted from https://stackoverflow.com/a/31151808
     {
-        "$@"   2>&1 1>&3 3>&- | indent " ! "
+        stdbuf -oL -eL "$@"   2>&1 1>&3 3>&- | indent " ! "
     } 3>&1 1>&2 | indent " | " | tee -a "$LOGFILE"
 }