build: Provide AppImage package for Linux (issue #279) (#945)

* Create AppImage package using linuxdeployqt in Travis CI
* Renamed appPath() to sharedDataPath()
* Fixed include error in tutorial

deployment/dockerfiles/linux/centos7_64/Dockerfile

@@ -87,6 +87,15 @@ tar -xzf boost_${BOOST_VERSION_UNDERSCORE}.tar.gz && cd boost_${BOOST_VERSION_UN
 ./b2 install cxxstd=14 --link=static --variant=release --threading=multi --runtime-link=static --cxxflags="-std=c++14 -fPIC" && \
 cd .. && rm boost_${BOOST_VERSION_UNDERSCORE}.tar.gz && rm boost_${BOOST_VERSION_UNDERSCORE} -r
 
+# linuxdeployqt
+RUN wget https://github.com/probonopd/linuxdeployqt/releases/download/6/linuxdeployqt-6-x86_64.AppImage && \
+chmod a+x linuxdeployqt-6-x86_64.AppImage && \
+./linuxdeployqt-6-x86_64.AppImage --appimage-extract && \
+cp -r squashfs-root/usr/ /opt/linuxdeployqt && \
+chmod -R 755 /opt/linuxdeployqt && \
+rm linuxdeployqt-6-x86_64.AppImage && rm -rf squashfs-root
+ENV PATH=/opt/linuxdeployqt/bin:${PATH}
+
 #add user
 RUN useradd -u 1000 builder
 WORKDIR /home/builder

deployment/dockerfiles/linux/centos7_64_base/Dockerfile

@@ -7,7 +7,7 @@ WORKDIR /opt
 RUN rpm --rebuilddb; yum install -y yum-plugin-ovl ca-certificates;
 
 RUN yum -y install centos-release-scl epel-release && \
-yum -y install make wget devtoolset-7-gcc devtoolset-7-gcc-c++ devtoolset-7-binutils \
+yum -y install make wget file devtoolset-7-gcc devtoolset-7-gcc-c++ devtoolset-7-binutils \
 	wget tar bzip2 git libtool which fuse fuse-devel libpng-devel automake \
 	glibc-headers libstdc++-devel gcc-c++ freetype-devel fontconfig-devel\
 	libxml2-devel libstdc++-devel libXrender libXrender-devel patch xcb-util-keysyms xcb-util-keysyms-devel \

deployment/dockerfiles/linux/travis_ci/Dockerfile

@@ -1,5 +1,21 @@
 FROM coatisoftware/centos7_64_qt_llvm:qt5126-llvm900
 
+# TODO: remove after full image rebuilt ------------------------------------
+USER root
+
+RUN yum -y install file
+
+RUN wget https://github.com/probonopd/linuxdeployqt/releases/download/6/linuxdeployqt-6-x86_64.AppImage && \
+chmod a+x linuxdeployqt-6-x86_64.AppImage && \
+./linuxdeployqt-6-x86_64.AppImage --appimage-extract && \
+cp -r squashfs-root/usr/ /opt/linuxdeployqt && \
+chmod -R 755 /opt/linuxdeployqt && \
+rm linuxdeployqt-6-x86_64.AppImage && rm -rf squashfs-root
+ENV PATH=/opt/linuxdeployqt/bin:${PATH}
+
+USER builder
+# --------------------------------------------------------------------------
+
 COPY entrypoint.sh /entrypoint.sh
 
 ENTRYPOINT ["/entrypoint.sh"]

deployment/dockerfiles/linux/travis_ci/entrypoint.sh

@@ -14,5 +14,8 @@ git checkout $1
 
 ./script/build.sh release test
 
+./setup/Linux/createAppImage.sh
+
 mkdir release
 cp ./Sourcetrail*.tar.gz ./release/
+cp ./Sourcetrail*.AppImage ./release/