Add contributors' check

This script aims to identify the unreferenced authors to invite the
team to check if they have already signed the contributor license
agreement (CLA). When this is done, the authors must be added to the
reference list.

.gitlab-ci.yml

@@ -97,6 +97,18 @@ fast-build:
     - ctest -V -S CI/main_ci.cmake -DIMAGE_NAME:string=ubuntu-18.04-fast
     - ccache -s
 
+contibutors-check:
+  extends: .common
+  only: [merge_requests, develop]
+  stage: precheck
+  image: $BUILD_IMAGE_REGISTRY/otb-alpine:3.7
+  variables:
+    GIT_DEPTH: ""
+  allow_failure: true
+  script:
+    - ./CI/contributors_check.sh
+  after_script: []
+
 #------------------------- prepare & build jobs --------------------------------
 debian-build:
   extends: .common-build

CI/contributors_check.sh

+#!/bin/bash
+#
+# Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
+#
+# This file is part of Orfeo Toolbox
+#
+#     https://www.orfeo-toolbox.org/
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# This script aims to identify the unreferenced authors to invite the team to
+# check if they have already signed the contributor license agreement (CLA).
+# When this is done, the author must be added to the reference list.
+
+
+GITLAB_PROJECT_URL=https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb-devutils
+GIT_CONTRIBUTORS=/tmp/git-contributors.txt
+KNOWN_CONTRIBUTORS=/tmp/known-contributors.txt
+UNKNOWN_CONTRIBUTORS=/tmp/unknown-contributors.txt
+
+# According to the Git documentation, the reference ("HEAD" in the present
+# case) must be passed on the command line when the standard input of "git
+# shortlog" command is not a terminal. Without the reference in such
+# situation, the output of "git shortlog" is empty.
+git shortlog -es HEAD | cut -f 2- \
+    | sort -u > ${GIT_CONTRIBUTORS}
+
+curl -s ${GITLAB_PROJECT_URL}/raw/master/CI/contributors/known-contributors.txt \
+    | sort -u > ${KNOWN_CONTRIBUTORS}
+
+diff ${KNOWN_CONTRIBUTORS} ${GIT_CONTRIBUTORS} > ${UNKNOWN_CONTRIBUTORS}
+if [ "$?" -ne "0" ] ; then
+    echo ""
+    echo "WARNING: ***************************************************************"
+    echo "WARNING: Unknown contributors found:"
+    sed -n -e 's,^> ,WARNING: - ,p' ${UNKNOWN_CONTRIBUTORS}
+    echo "WARNING: Check if they have signed the contributor license agreements."
+    echo "WARNING: ***************************************************************"
+    echo ""
+    exit 1
+else
+    echo "All contributors are already known."
+    exit 0
+fi