Pushd/popd like a pro when installing

.travis_install.bash

@@ -6,7 +6,6 @@ set -o nounset
 download_llvm(){
   echo "Downloading and installing LLVM ${LLVM_VERSION}"
 
-  cd /tmp
   wget "http://llvm.org/releases/${LLVM_VERSION}/clang+llvm-${LLVM_VERSION}-x86_64-linux-gnu-debian8.tar.xz"
   tar -xvf clang+llvm*
   pushd clang+llvm* && sudo mkdir /tmp/llvm && sudo cp -r ./* /tmp/llvm/
@@ -17,7 +16,6 @@ download_llvm(){
 download_pcre(){
   echo "Downloading and building PCRE2..."
 
-  cd /tmp
   wget "ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre2-10.21.tar.bz2"
   tar -xjvf pcre2-10.21.tar.bz2
   pushd pcre2-10.21 && ./configure --prefix=/usr && make && sudo make install
@@ -26,7 +24,6 @@ download_pcre(){
 
 install-ponyc-master(){
   echo "Installing ponyc master..."
-  cd /tmp
   git clone [email protected]:WallarooLabs/ponyc.git
   cd ponyc
   echo "Building ponyc..."
@@ -37,11 +34,11 @@ echo "Installing ponyc build dependencies..."
 if [ "${TRAVIS_EVENT_TYPE}" = "cron" ]
 then
   echo -e "\033[0;32mInstalling ponyc master\033[0m"
-  INSTALL_STARTED_AT=`pwd`
+  pushd /tmp
   download_llvm
   download_pcre
   install-ponyc-master
-  cd $INSTALL_STARTED_AT
+  popd
 else
   echo -e "\033[0;32mInstalling latest ponyc release\033[0m"
   sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys "8756 C4F7 65C9 AC3C B6B8  5D62 379C E192 D401 AB61"