fix: silence a few more variables in chroot-pip

Author: autumnjolitz

chroot-pip.sh

@@ -89,23 +89,22 @@ fi
 case "$@" in
     *'--force-reinstall'*|optimize*)
     maybe_packages=
-    index=-1
+    index='-1'
     for package_name in $@
     do
-        if ! case "$package_name" in '-'*) true ;; *) false ;; esac ; then
-            index="$(expr $index \+ 1)" || true  # ARJ: expr 0  returns 1 lol
+        if [ x"$package_name" != x ] && ! case "$package_name" in '-'*) true ;; *) false ;; esac ; then
+            index="$(expr $index \+ 1)" || index='0'
+            if case "$package_name" in *'=='*) true ;; *) false ;; esac ; then
+                package_name="$(echo "${package_name}" | cut -d'=' -f1 | xargs)"
+            fi
             if [ $index -ne 0 ]; then
-                maybe_packages="${maybe_packages} $package_name"
+                maybe_packages="${maybe_packages} ${package_name}"
             fi
         fi
     done
-    package_name=
     if [ x$maybe_packages != x ]; then
         for package_name in $maybe_packages
         do
-            if case "$package_name" in *'=='*) true ;; *) false ;; esac ; then
-                package_name="$(echo "${package_name}" | cut -d'=' -f1 | xargs)"
-            fi
             # if the package is already installed, flag it
             # as if it wasn't installed so we can optimize it
             if [ x$package_name != x ] && pip show "${package_name}" >/dev/null ; then