Add new CI scripts that check, build, test and publish the images, move the .utilities

.utilities/check.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# Docker Seafile client, help you mount a Seafile library as a volume.
+# Copyright (C) 2019-2020, flow.gunso@gmail.com
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Check the CI pipeline sources.
+if ! [[ "$CI_PIPELINE_SOURCE" == "push" || "$CI_PIPELINE_SOURCE" == "schedule" ]]; then
+    echo "CI pipelines are only allowed from the push and schedule sources"
+    exit 1
+fi
+
+# Check the schedule target for the scheduled CI pipelines.
+if [[ "$CI_PIPELINE_SOURCE" == "schedule" ]]; then
+    if [[ -z "$SCHEDULE_TARGET" ]]; then
+        echo "\$SCHELUDE_TARGET was not provided."
+        exit 1
+    fi
+
+    if ! [[ "$SCHEDULE_TARGET" == "weekly" ]]; then
+        echo "\$SCHEDULE_TARGET $SCHEDULE_TARGET is not known."
+        exit 1
+    fi
+fi
+
+# Check the tag is properly defined on job other than update_docker_hub_full_description job,
+# on pushed CI pipelines.
+if [[ "$CI_PIPELINE_SOURCE" == "push" ]]; then
+    if ! [[ "$CI_JOB_NAME" == "update_docker_hub_full_description" ]]; then 
+        if [[ -z "$CI_COMMIT_TAG" && "$CI_COMMIT_TAG" =~ ^[0-9]+[.][0-9]+[.][0-9]+$ ]]
+            echo "The \$CI_COMMIT_TAG $CI_COMMIT_TAG does not match the MAJOR.Minor.revision layout."
+            exit 1
+        fi
+    fi
+fi