Make shellcheck happier

install.sh

@@ -7,10 +7,10 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 here=$(pwd)
 
-pushd $DIR
+pushd "$DIR" || exit 255
 rm -f .root
-echo "$(pwd)" > .root
-popd
+pwd > .root
+popd || exit 255
 
 ret=0
 
@@ -20,26 +20,26 @@ ret=0
 
 for i in _reformat-common.bash do-reformat.sh would-reformat.sh .root; do
     if [[ -f "$here"/bin/"$i" ]] ; then
-        dest=$(readlink bin/$i)
-        if [[ x"$dest" == x"$DIR/$i" ]] ; then
-            echo $i is in place, good
+        dest=$(readlink bin/"$i")
+        if [[ "$dest" == "$DIR/$i" ]] ; then
+            echo "$i" is in place, good
         else
-            echo $i exists but it is not a symlink or does not point to the right place
-            echo If it is a symlink, it points to: $dest
+            echo "$i" exists but it is not a symlink or does not point to the right place
+            echo If it is a symlink, it points to: "$dest"
             echo "(If it doesn't point anywhere, then it probably is not a symlink)"
             ret=1
         fi
     else
         # it doesn't exist; create it
-        echo setting $i up
-        mkdir -p $here/bin
-        ln -s $DIR/$i $here/bin/$i
+        echo setting "$i" up
+        mkdir -p "$here"/bin
+        ln -s "$DIR"/"$i" "$here"/bin/"$i"
     fi
 done
 
 if [[ -f $here/.dir-locals.el ]] ; then
     dest=$(readlink .dir-locals.el)
-    if [[ x"$dest" == x"$DIR/_dir-locals.el" ]] ; then
+    if [[ "$dest" == "$DIR/_dir-locals.el" ]] ; then
         echo .dir-locals.el is in place, good
     else
         echo .dir-locals.el exists but it is not a symlink or does not point to
@@ -51,7 +51,7 @@ if [[ -f $here/.dir-locals.el ]] ; then
     fi
 else
     echo setting .dir-locals.el up
-    ln -s $DIR/_dir-locals.el $here/.dir-locals.el
+    ln -s "$DIR"/_dir-locals.el "$here"/.dir-locals.el
 fi
 
 exit $ret