chg: [nextcloud] enhance catching installation errors

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

nextcloud/lib/common

@@ -93,9 +93,16 @@ create_occ_if_not_exists() {
         ## NEXTCLOUD_ADMIN_{USER,PASSWORD} that is required to trigger
         ## a full installation
 
+        if ! out=$(
                 export COMPOSE_IGNORE_ORPHANS=true
                 compose --debug --without-relation="$SERVICE_NAME":web-proxy run \
-                --rm --entrypoint /entrypoint.sh "$SERVICE_NAME" apache >&2 || true
+                        -v "$CHARM_PATH"/src/fake-apache:/usr/bin/apache \
+                        --rm --entrypoint /entrypoint.sh "$SERVICE_NAME" apache 2>&1
+             ); then
+            err "Initialization of code or database failed unexpectedly"
+            e "$out" | prefix "  | "
+            return 1
+        fi
         if ! [ -e "$SERVICE_DATASTORE/var/www/html/occ" ]; then
             err "Expected last command to create /var/www/html/occ"
             return 1

nextcloud/src/fake-apache

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+true