* Automatic Dockerfile update by release process

The value 172.17.0.1 is the default gateway on the default Docker
network. However, when using this image with 'docker-compose', a
new network is created, which means that the IP address of the
gateway is different by definition. Because the network is created
at the same time as the containers, the IP address isn't available
when the YAML definition is created.

This approach replaces the static approach with a dynamic approach
executed at first container startup.

Dockerfile

@@ -5,7 +5,7 @@ ARG SRCIMAGE=debian:bookworm-slim
 
 FROM  $SRCIMAGE AS builder
 
-ARG LSMB_VERSION="1.11.8"
+ARG LSMB_VERSION="1.11.9"
 ARG LSMB_DL_DIR="Releases"
 ARG ARTIFACT_LOCATION="https://download.ledgersmb.org/f/$LSMB_DL_DIR/$LSMB_VERSION/ledgersmb-$LSMB_VERSION.tar.gz"
 
@@ -51,7 +51,7 @@ LABEL org.opencontainers.image.description="LedgerSMB is a full featured double-
  the LedgerSMB project is to bring high quality ERP and accounting capabilities\
  to Small and Midsize Businesses."
 
-ARG LSMB_VERSION="1.11.8"
+ARG LSMB_VERSION="1.11.9"
 ARG LSMB_DL_DIR="Releases"
 ARG ARTIFACT_LOCATION="https://download.ledgersmb.org/f/$LSMB_DL_DIR/$LSMB_VERSION/ledgersmb-$LSMB_VERSION.tar.gz"
 
@@ -78,7 +78,7 @@ RUN set -x ; \
   DEBIAN_FRONTEND="noninteractive" apt-get -y update && \
   DEBIAN_FRONTEND="noninteractive" apt-get -y upgrade && \
   DEBIAN_FRONTEND="noninteractive" apt-get -y install \
-    wget ca-certificates gnupg \
+    wget ca-certificates gnupg iproute2 \
     $( cat /tmp/derived-deps ) \
     libclass-c3-xs-perl \
     texlive-plain-generic texlive-latex-recommended texlive-fonts-recommended \
@@ -110,7 +110,9 @@ WORKDIR /srv/ledgersmb
 # Configure outgoing mail to use host, other run time variable defaults
 
 ## MAIL
-ENV LSMB_MAIL_SMTPHOST 172.17.0.1
+# '__CONTAINER_GATEWAY__' is a magic value which will be substituted
+# with the actual gateway IP address
+ENV LSMB_MAIL_SMTPHOST __CONTAINER_GATEWAY__
 #ENV LSMB_MAIL_SMTPPORT 25
 #ENV LSMB_MAIL_SMTPSENDER_HOSTNAME (container hostname)
 #ENV LSMB_MAIL_SMTPTLS

start.sh

@@ -67,7 +67,6 @@ if [[ -n "$LSMB_HAVE_DEPRECATED" ]]; then
     echo "!!! DEPRECATED \$SSMTP_* PARAMETERS WILL BE REMOVED in the 1.9 image!!!"
 fi
 
-
 if [[ ! -f ./local/conf/ledgersmb.yaml ]]; then
   cat <<EOF >./local/conf/ledgersmb.yaml
 paths:
@@ -105,6 +104,12 @@ EOF
 
   if [[ -n "$LSMB_MAIL_SMTPHOST" ]]
   then
+      if [[ "$LSMB_MAIL_SMTPHOST" == "__CONTAINER_GATEWAY__" ]]
+      then
+         LSMB_MAIL_SMTPHOST="$(ip route | awk '/default/ { print $3 }')"
+         export LSMB_MAIL_SMTPHOST
+      fi
+
       cat <<EOF >./local/conf/ledgersmb.000.yaml
 mail:
   transport: