Merge pull request #2867 from gebart/pr/drone-ci

drone: added Drone file

.drone.yml

+image: riot/riotbuild:latest
+
+env:
+    - NPROC_MAX=8
+
+script:
+    - git config --global user.email "drone@example.com"
+    - git config --global user.name "Drone CI"
+    - git remote add riot https://github.com/RIOT-OS/RIOT.git
+    - git fetch riot master
+    - git log -1 --pretty=format:%H riot/master
+    - git branch -f master riot/master
+    - pwd
+    - set
+    - git status
+    - git branch
+    - git remote -v
+    - git branch -avv
+    - ./dist/tools/drone-scripts/build_and_test.sh riot/master

dist/tools/drone-scripts/build_and_test.sh

+#!/bin/bash
+# Copyright (C) 2015 Eistec AB
+#
+# This file is subject to the terms and conditions of the GNU Lesser General
+# Public License v2.1. See the file LICENSE in the top level directory for more
+# details.
+
+# For now, just ride on the Travis build scripts
+
+# Drone has not yet implemented Travis' Matrix Build feature,
+# see https://github.com/drone/drone/issues/6
+FAILURES=0
+SUMMARY_MESSAGE="Summary of test groups run:\n"
+
+# Travis compatibility defines
+export TRAVIS_PULL_REQUEST="${CI_PULL_REQUEST}"
+export TRAVIS_BRANCH="${CI_BRANCH}"
+export TRAVIS_BUILD_NUMBER="${CI_BUILD_NUMBER}"
+export TRAVIS_COMMIT="${DRONE_COMMIT}"
+export TRAVIS_BUILD_DIR="${DRONE_BUILD_DIR}"
+
+for group in static-tests \
+             avr8         \
+             msp430       \
+             x86          \
+             arm7         \
+             cortex_m0    \
+             cortex_m3_1  \
+             cortex_m3_2  \
+             cortex_m4    \
+    ;
+do
+    echo "Begin group ${group}"
+    BUILDTEST_MCU_GROUP=${group} ./dist/tools/travis-scripts/build_and_test.sh "$@"
+    RES=$?
+    echo "Result (${group}): ${RES}"
+    if [ ${RES} -ne 0 ]; then
+        FAILURES=$((${FAILURES} + 1))
+    fi
+    SUMMARY_MESSAGE="${SUMMARY_MESSAGE}${group}: ${RES}\n"
+done
+
+echo -n -e "${SUMMARY_MESSAGE}"
+
+if [ ${FAILURES} -eq 0 ]; then
+    echo "Build and test: All successful"
+else
+    echo "Build and test: ${FAILURES} failures in total"
+fi
+
+exit ${FAILURES}