Proper error handling

setup_env.sh

@@ -4,39 +4,59 @@ function status_update {
     echo "### $1 ###"
 }
 
+function fail {
+    echo "An error has occured. Exiting."
+    exit 1
+}
+
+function gitclone {
+    if [ -d "$2" ] ; then
+        if [ -d "$2/.git" ] ; then
+            git -C "$2" pull || fail
+        else
+            >&2 echo "Directory "$2" is present and not git. Aborting."
+            fail
+        fi
+    else
+        git clone "$1" "$2" || fail
+    fi
+}
+
+
 base_dir="$(dirname "$(readlink -f "$0")")"
 cd "$base_dir"
 
 # First, clone Francesco's eh_frame_check
 status_update "Cloning eh_frame_check"
-git clone https://github.com/francesco-zappa-nardelli/eh_frame_check/
+gitclone \
+    https://github.com/francesco-zappa-nardelli/eh_frame_check/ eh_frame_check
 
 # Then, clone glibc
 status_update "Cloning glibc"
-git clone git://sourceware.org/git/glibc.git glibc
+gitclone git://sourceware.org/git/glibc.git glibc
 
 # Install a virtualenv with required pip packages
 status_update "Installing python virtualenv"
-virtualenv -p python3 venv
+virtualenv -p python3 venv || fail
 source venv/bin/activate
-pip install -r requirements.txt
+pip install -r requirements.txt || fail
 
 # Compiling glibc
 status_update "Compiling base glibc"
 (
     mkdir -p glibc/build/install
     cd glibc/build
-    ../configure --prefix=install
-    make
-)
+    ../configure --prefix=install || exit 1
+    make || exit 1
+) || fail
 
 # Compiling testsuite
 status_update "Compiling glibc testsuite"
 status_update "Feel free to go and drink some coffee now. This will take some time."
 (
     cd glibc/build
-    make check
-)
+    make check || exit 1
+) || fail
 
 # Done!
 status_update "All set!"