testing travis integration of make check

.travis.yml

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+language: c
+sudo: false
+
+before_script:
+  - ./travis_do.sh download_sdk
+
+script:
+  - ./travis_do.sh test_packages

travis_do.sh

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+#!/bin/sh
+#
+# MIT Alexander Couzens <[email protected]>
+
+set -e
+
+SDK=lede-sdk-ar71xx-generic_gcc-5.4.0_musl.Linux-x86_64
+PACKAGES_DIR=$PWD
+
+# download will run on the `before_script` step
+download_sdk() {
+	wget https://downloads.lede-project.org/snapshots/targets/ar71xx/generic/$SDK.tar.xz -O $HOME/sdk.tar.gz
+}
+
+# test_package will run on the `script` step
+test_packages() {
+	# search for new or modified packages. PKGS will hold a list of package like 'admin/muninlite admin/monit ...'
+	PKGS=$(git diff --stat origin/master | grep Makefile | grep -v '/files/' | awk '{ print $1}' | awk -F'/Makefile' '{ print $1 }')
+
+	if [ -z "$PKGS" ] ; then
+		echo "No new or modified packages found!" >&2
+		exit 1
+	fi
+
+	# E.g: pkg_dir => admin/muninlite
+	#      pkg_name => muninlite
+	for pkg_dir in $PKGS ; do
+		local pkg_name
+		pkg_name=$(echo $pkg_dir | awk -F/ '{ print $NF }')
+
+		# create a clean sdk for every package
+		mkdir -p $HOME/tmp/$pkg_name/
+		cd $HOME/tmp/$pkg_name/
+		tar Jxf $HOME/sdk.tar.gz
+		cd $SDK
+
+		cat > feeds.conf <<EOF
+src-git base https://git.lede-project.org/source.git
+src-link packages $PACKAGES_DIR
+src-git luci https://git.lede-project.org/project/luci.git
+src-git routing https://git.lede-project.org/feed/routing.git
+src-git telephony https://git.lede-project.org/feed/telephony.git
+EOF
+		./scripts/feeds update
+		./scripts/feeds install $pkg_name
+
+		make package/$pkg_name/download
+		make package/$pkg_name/check V=s | grep -q WARNING || exit 1
+	done
+}
+
+if [ $# -ne 2 ] ; then
+	cat <<EOF
+Usage: $0 (download_sdk|test_packages)
+
+download_sdk - download the SDK to $HOME/sdk.tar.xz
+test_packages - do a make check on the package
+EOF
+	exit 1
+fi
+
+$@