Add helpers ynh_systemd_action for package_check

scripts/_common.sh

@@ -2,3 +2,88 @@
 
 pkg_dependencies="sqlite3"
 create_dir=0
+
+
+#=================================================
+# EXPERIMENTAL HELPERS
+# TO BE DELETED WHEN RELEASED
+#=================================================
+
+#=================================================
+#YNH_SYSTEMD_ACTION
+#=================================================
+
+# Start (or other actions) a service,  print a log in case of failure and optionnaly wait until the service is completely started
+#
+# usage: ynh_system_reload service_name [action]
+# | arg: -n, --service_name= - Name of the service to reload. Default : $app
+# | arg: -a, --action=       - Action to perform with systemctl. Default: start
+# | arg: -l, --line_match=   - Line to match - The line to find in the log to attest the service have finished to boot.
+#                              If not defined it don't wait until the service is completely started.
+# | arg: -p, --log_path=     - Log file - Path to the log file. Default : /var/log/$app/$app.log
+# | arg: -t, --timeout=      - Timeout - The maximum time to wait before ending the watching. Default : 300 seconds.
+# | arg: -e, --length=       - Length of the error log : Default : 20
+ynh_systemd_action() {
+    # Declare an array to define the options of this helper.
+    declare -Ar args_array=( [n]=service_name= [a]=action= [l]=line_match= [p]=log_path= [t]=timeout= [e]=length= )
+    local service_name
+    local action
+    local line_match
+    local length
+    local log_path
+    local timeout
+
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+
+    local service_name="${service_name:-$app}"
+    local action=${action:-start}
+    local log_path="${log_path:-/var/log/$service_name/$service_name.log}"
+    local length=${length:-20}
+    local timeout=${timeout:-300}
+    local wait_starting=true
+
+    if [[ -z "${line_match:-}" ]]
+    then
+        wait_starting=false
+    fi
+
+    ynh_clean_check_starting () {
+        # Stop the execution of tail.
+        kill -s 15 $pid_tail 2>&1
+        ynh_secure_remove "$templog" 2>&1
+    }
+
+    echo "Starting of $service_name" >&2
+    systemctl $action $service_name || ( journalctl --lines=$length -u $service_name >&2 && false)
+
+    if $wait_starting
+    then
+        # Following the starting of the app in its log
+        local templog="$(mktemp)"
+        tail -F -n1 "$log_path" > "$templog" &
+        # Get the PID of the tail command
+        local pid_tail=$!
+
+        local i=0
+        for i in $(seq 1 $timeout)
+        do
+            # Read the log until the sentence is found, that means the app finished to start. Or run until the timeout
+            if grep --quiet "$line_match" "$templog"
+            then
+                echo "The service $service_name has correctly started." >&2
+                break
+            fi
+            echo -n "." >&2
+            sleep 1
+        done
+        if [ $i -eq $timeout ]
+        then
+            echo "The service $service_name didn't fully started before the timeout." >&2
+            journalctl --lines=$length -u $service_name >&2
+        fi
+
+        echo ""
+        ynh_clean_check_starting
+    fi
+}

scripts/install

@@ -216,7 +216,8 @@ fi
 #=================================================
 ynh_print_info "Reload nginx and start $app"
 systemctl reload nginx
-systemctl start $app
+#systemctl start $app
+ynh_systemd_action -l "Started calibreweb"
 
 #=================================================
 # WARNING FOR READ ACCESS