1 files changed, 46 insertions, 18 deletions
diff --git a/docker/start.sh b/docker/start.sh
index c687515f..042bdd05 100755
--- a/docker/start.sh
+++ b/docker/start.sh
@@ -1,28 +1,56 @@
 #!/bin/sh
 
-# Cleanup SOCAT services and s6 event folder
-# On start and on shutdown in case container has been killed
-rm -rf $(find /app/gogs/docker/s6/ -name 'event')
-rm -rf /app/gogs/docker/s6/SOCAT_*
+create_socat_links() {
+    # Bind linked docker container to localhost socket using socat
+    USED_PORT="3000:22"
+    while read NAME ADDR PORT; do
+        if test -z "$NAME$ADDR$PORT"; then
+            continue
+        elif echo $USED_PORT | grep -E "(^|:)$PORT($|:)" > /dev/null; then
+            echo "init:socat  | Can't bind linked container ${NAME} to localhost, port ${PORT} already in use" 1>&2
+        else
+            SERV_FOLDER=/app/gogs/docker/s6/SOCAT_${NAME}_${PORT}
+            mkdir -p ${SERV_FOLDER}
+            CMD="socat -ls TCP4-LISTEN:${PORT},fork,reuseaddr TCP4:${ADDR}:${PORT}"
+            echo -e "#!/bin/sh\nexec $CMD" > ${SERV_FOLDER}/run
+            chmod +x ${SERV_FOLDER}/run
+            USED_PORT="${USED_PORT}:${PORT}"
+            echo "init:socat  | Linked container ${NAME} will be binded to localhost on port ${PORT}" 1>&2
+        fi
+    done << EOT
+    $(env | sed -En 's|(.*)_PORT_([0-9]+)_TCP=tcp://(.*):([0-9]+)|\1 \3 \4|p')
+EOT
+}
 
-# Create VOLUME subfolder
-for f in /data/gogs/data /data/gogs/conf /data/gogs/log /data/git /data/ssh; do
-    if ! test -d $f; then
-        mkdir -p $f
-    fi
-done
+cleanup() {
+    # Cleanup SOCAT services and s6 event folder
+    # On start and on shutdown in case container has been killed
+    rm -rf $(find /app/gogs/docker/s6/ -name 'event')
+    rm -rf /app/gogs/docker/s6/SOCAT_*
+}
 
-# Bind linked docker container to localhost socket using socat
-env | sed -En 's|(.*)_PORT_([0-9]*)_TCP=tcp://(.*):(.*)|\1_\2 socat -ls TCP4-LISTEN:\2,fork,reuseaddr TCP4:\3:\4|p' | \
-while read NAME CMD; do
-    mkdir -p /app/gogs/docker/s6/SOCAT_$NAME
-    echo -e "#!/bin/sh\nexec $CMD" > /app/gogs/docker/s6/SOCAT_$NAME/run
-    chmod +x /app/gogs/docker/s6/SOCAT_$NAME/run
-done
+create_volume_subfolder() {
+    # Create VOLUME subfolder
+    for f in /data/gogs/data /data/gogs/conf /data/gogs/log /data/git /data/ssh; do
+        if ! test -d $f; then
+            mkdir -p $f
+        fi
+    done
+}
+
+cleanup
+create_volume_subfolder
+
+LINK=$(echo "$SOCAT_LINK" | tr '[:upper:]' '[:lower:]')
+if [ "$LINK" = "false" -o "$LINK" = "0" ]; then
+    echo "init:socat  | Will not try to create socat links as requested" 1>&2
+else
+    create_socat_links
+fi
 
 # Exec CMD or S6 by default if nothing present
 if [ $# -gt 0 ];then
     exec "$@"
 else
-    exec /usr/bin/s6-svscan /app/gogs/docker/s6/
+    exec /bin/s6-svscan /app/gogs/docker/s6/
 fi