first cut at file to clean up variant trees by removing anything not

under version control

xwords4/android/scripts/rm-non-git.sh

@@ -0,0 +1,75 @@
+#!/bin/bash
+
+set -u -e
+
+EXCEPTS=" "
+
+echo "$0 $*"
+pwd
+
+usage() {
+    [ $# -ge 1 ] && echo "ERROR: $1"
+    echo "usage: $0 [--except path/to/file]*"
+    exit 1
+}
+
+# rm_not_excepted() {
+#     FILE=$1
+#     for EXCEPT in $EXCEPTS; do
+#         if [ $EXCEPT = $FILE ]; then
+#             echo "skipping delete of $FILE"
+#             FILE=""
+#             break
+#         fi
+#     done
+
+#     [ -n "$FILE" ] && rm $FILE
+# }
+
+rm_in() {
+    echo "rm_in $1"
+    for FILE in $(ls $1); do
+        FILE=$1/$FILE
+        echo "FILE: $FILE"
+        if [ ! "${EXCEPTS}" = "${EXCEPTS# $FILE }" ]; then
+            echo "$FILE is in $EXCEPTS"
+            continue
+        elif [ -d $FILE ]; then
+            rm_in $FILE
+        elif git ls-files $FILE --error-unmatch 2>/dev/null; then
+            echo "$FILE is a git file"
+            continue
+        else
+            echo "rm $FILE"
+            rm $FILE
+        fi
+    done
+}
+
+
+while [ $# -ge 1 ]; do
+    case $1 in
+        --except)
+            FILE=$2
+            shift
+            if [ $FILE != ${FILE#/} ]; then          # starts with / ?
+                :                                    # leave it along
+            elif [ "$FILE" != "${FILE#\./}" ]; then  # starts with ./ ?
+                :                                    # leave it alone
+            else
+                FILE="./${FILE}"                     # prepend ./ to match ls output
+            fi
+            EXCEPTS=" $EXCEPTS $FILE "
+            ;;
+        *)
+            usage "unexpected param $1"
+            ;;
+    esac
+    shift
+done
+
+echo "EXCEPTS: $EXCEPTS"
+exit 0
+
+rm_in "."
+echo "$0: exiting cleanly"