From 3c9af7f6c5f597773cc2b1b60e8cac2ac7ae7d7b Mon Sep 17 00:00:00 2001
From: Shakar Bakr <5h4k4r.b4kr@gmail.com>
Date: Wed, 29 Oct 2025 16:56:47 +0300
Subject: [PATCH] use go-cron

Signed-off-by: Shakar Bakr <5h4k4r.b4kr@gmail.com>
---
 Dockerfile |  9 +++++++++
 src/run.sh | 20 ++++----------------
 2 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 5965fd9..5e2a8ef 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,6 +21,15 @@ RUN curl -O https://download.microsoft.com/download/b/9/f/b9f3cce4-3925-46d4-9f4
     apk add --allow-untrusted mssql-tools18_18.1.1.1-1_amd64.apk && \
     rm msodbcsql18_18.1.1.1-1_amd64.apk mssql-tools18_18.1.1.1-1_amd64.apk
 
+# Install go-cron for scheduled backups
+# Source: https://github.com/ivoronin/go-cron
+ARG TARGETARCH
+RUN curl -L https://github.com/ivoronin/go-cron/releases/download/v0.0.5/go-cron_0.0.5_linux_${TARGETARCH}.tar.gz -O && \
+    tar xvf go-cron_0.0.5_linux_${TARGETARCH}.tar.gz && \
+    rm go-cron_0.0.5_linux_${TARGETARCH}.tar.gz && \
+    mv go-cron /usr/local/bin/go-cron && \
+    chmod +x /usr/local/bin/go-cron
+
 RUN rm -rf /var/cache/apk/*
 
 ENV PATH="${PATH}:/opt/mssql-tools18/bin"
diff --git a/src/run.sh b/src/run.sh
index a80f9cd..977d66e 100644
--- a/src/run.sh
+++ b/src/run.sh
@@ -11,22 +11,10 @@ fi
 if [ -z "$SCHEDULE" ]; then
   sh backup.sh
 else
-  # For non-root users, use a writable directory for crontabs
-  # busybox crond supports -c option to specify crontab directory
-  CRON_USER=$(id -u)
-  CRON_DIR="${HOME}/crontabs"
-
-  # Create crontab directory
-  mkdir -p "$CRON_DIR"
-
-  # Write crontab entry
-  echo "$SCHEDULE /bin/sh $(pwd)/backup.sh" > "$CRON_DIR/$CRON_USER"
-  chmod 600 "$CRON_DIR/$CRON_USER"
-
   echo "Backup schedule configured: $SCHEDULE"
-  echo "Crontab file: $CRON_DIR/$CRON_USER"
-  echo "Starting crond..."
+  echo "Starting go-cron..."
 
-  # Start crond in foreground mode with custom crontab directory
-  exec crond -f -d 8 -c "$CRON_DIR"
+  # Use go-cron to run backup.sh on the specified schedule
+  # go-cron takes schedule and command as arguments
+  exec go-cron "$SCHEDULE" /bin/sh "$(pwd)/backup.sh"
 fi