Add setup script for tacle-tidy

setup.sh

+#!/bin/sh -xe
+
+# repos
+LLVM_GIT="http://llvm.org/git/llvm.git"
+CLANG_GIT="http://llvm.org/git/clang.git"
+EXTRA_GIT="http://llvm.org/git/clang-tools-extra.git"
+EXTRA_TACLE_GIT="git@gitlab.cs.fau.de:tacle/tacle-clang-tools-extra.git"
+
+# branch/version
+VERSION="release_37"
+
+# source paths
+export BASE=`pwd`
+export LLVM_SRC="${BASE}/llvm"
+export CLANG_SRC="${LLVM_SRC}/tools/clang"
+export EXTRA_SRC="${LLVM_SRC}/tools/clang/tools"
+
+# build path
+export LLVM_BUILD="${BASE}/build"
+
+# get llvm
+if ! test -d ${LLVM_SRC}; then
+  git clone ${LLVM_GIT} ${LLVM_SRC}
+  cd ${LLVM_SRC}
+  git checkout ${VERSION}
+  cd ${BASE}
+fi
+
+# get clang
+if ! test -d ${CLANG_SRC}; then
+  git clone ${CLANG_GIT} ${CLANG_SRC}
+  cd ${LLVM_SRC}
+  git checkout ${VERSION}
+  cd ${BASE}
+fi
+
+# get clang's extras
+if ! test -d ${EXTRA_SRC}; then
+  git clone ${EXTRA_GIT} ${EXTRA_SRC}
+fi
+
+
+# Use maximum number of CPUs for build
+if [ -e /proc/cpuinfo ]; then
+    procs=`grep -c processor /proc/cpuinfo`
+else
+    procs=1
+fi
+
+# build llvm/clang
+mkdir -p ${LLVM_BUILD}
+cd ${LLVM_BUILD}
+if which cmake ; then
+    cmake ${LLVM_SRC}
+    make -j$procs
+else
+    echo "cmake is missing" >&2
+    exit 1
+fi
+