Add Debian sid build pass (#4707)

* Add Debian sid build pass

* Update file locations and copyright

* Use ccache

* Redirect within sudo

* Work around a pbuilder bug which breaks ccache

* Debian: enable parallel builds

* Travis: Debian: fix caching

* Fix shellcheck warnings

.travis/debian_pkgs.sha256

@@ -0,0 +1,2 @@
+314ef4af137903dfb13e8c3ef1e6ea56cfdb23808d52ec4f5f50e288c73610c5  pbuilder_0.229.1_all.deb
+fa82aa8ed3055c6f6330104deedf080b26778295e589426d4c4dd0f2c2a5defa  debootstrap_1.0.95_all.deb

.travis/linux..script.sh

@@ -1,7 +1,14 @@
 #!/usr/bin/env bash
+mkdir build
+cd build
+
 if [ $QT5 ]; then
 	unset QTDIR QT_PLUGIN_PATH LD_LIBRARY_PATH
 	source /opt/qt59/bin/qt59-env.sh
 fi
 
 cmake -DUSE_WERROR=ON $CMAKE_FLAGS ..
+
+make -j4
+make tests
+./tests/tests

.travis/linux.debian-sid.before_install.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+sudo apt-get update -qq

.travis/linux.debian-sid.install.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+set -e
+
+sudo apt-get install -y \
+	debian-archive-keyring \
+	dpkg \
+	pbuilder
+
+# work around a pbuilder bug which breaks ccache
+# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=666525
+cd /tmp
+wget http://archive.ubuntu.com/ubuntu/pool/main/p/pbuilder/pbuilder_0.229.1_all.deb
+wget http://archive.ubuntu.com/ubuntu/pool/main/d/debootstrap/debootstrap_1.0.95_all.deb
+sha256sum -c "$TRAVIS_BUILD_DIR/.travis/debian_pkgs.sha256"
+sudo dpkg -i pbuilder_0.229.1_all.deb debootstrap_1.0.95_all.deb
+cd "$OLDPWD"

.travis/linux.debian-sid.script.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+set -e
+
+BASETGZ="$HOME/pbuilder-bases/debian-sid-amd64.tgz"
+MIRROR=http://cdn-fastly.deb.debian.org/debian
+KEYRING=/usr/share/keyrings/debian-archive-keyring.gpg
+
+if [ -z "$TRAVIS_TAG" ]
+then
+	sudo \
+	sh -c "echo CCACHEDIR=$HOME/.ccache >> /etc/pbuilderrc"
+fi
+
+if [ ! -e "$BASETGZ.stamp" ]
+then
+	mkdir -p "$HOME/pbuilder-bases"
+	sudo pbuilder --create --basetgz "$BASETGZ" --mirror $MIRROR \
+		--distribution sid --architecture amd64 \
+		--debootstrapopts --variant=buildd \
+		--debootstrapopts --keyring=$KEYRING \
+		--debootstrapopts --include=perl
+	touch "$BASETGZ.stamp"
+else
+	sudo pbuilder --update --basetgz "$BASETGZ"
+fi
+
+DIR="$PWD"
+cd ..
+dpkg-source -b "$DIR"
+env -i sudo pbuilder --build --debbuildopts "--jobs=auto" --basetgz "$BASETGZ" ./*.dsc

.travis/linux.win32.script.sh

@@ -1,4 +1,8 @@
 #!/usr/bin/env bash
+mkdir build
+cd build
 
 export CMAKE_OPTS="$CMAKE_FLAGS -DUSE_WERROR=ON"
 ../cmake/build_mingw32.sh
+
+make -j4

.travis/linux.win64.script.sh

@@ -1,4 +1,8 @@
 #!/usr/bin/env bash
+mkdir build
+cd build
 
 export CMAKE_OPTS="$CMAKE_FLAGS -DUSE_WERROR=ON"
 ../cmake/build_mingw64.sh
+
+make -j4

.travis/osx..script.sh

@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
+mkdir build
+cd build
 
 if [ $QT5 ]; then
         # Workaround; No FindQt5.cmake module exists
@@ -6,3 +8,7 @@ if [ $QT5 ]; then
 fi
 
 cmake $CMAKE_FLAGS -DUSE_WERROR=OFF ..
+
+make -j4
+make tests
+./tests/tests