add bulk rename script

dotfiles/scripts/br

@@ -0,0 +1,42 @@
+#!/bin/sh
+# Copyright Cédric Picard 2014 -- License WTFPL
+# Inspired by Ranger's -- See https://github.com/hut/ranger
+
+set -e -u
+
+if [ $# -ne 0 ] ; then
+    { for i in "$@" ; do printf "%s\n" "$i" ; done } | "$0"
+    exit $?
+fi
+
+EDITOR="${EDITOR:-vi}"
+
+namebase="$(mktemp -d)/blkrn"
+echo '# Modify filenames without removing any line, quitting aborts' \
+    > "${namebase}.2"
+tee -- "${namebase}.1" >> "${namebase}.2"
+exec </dev/tty >/dev/tty \
+    || { echo 'Interactive terminal needed' >&2 ; exit 1; }
+
+"$EDITOR" "${namebase}.2"
+sed -i -- '1d' "${namebase}.2"
+
+if [ $(wc -l < "${namebase}.1") -ne $(wc -l < "${namebase}.2") ] ; then
+    rm -r -- "$(dirname -- "${namebase}")"
+    echo "Wrong number of lines" >&2 ; exit 1
+fi
+
+(echo '# Please review/modify this script or empty it to do nothing' \
+    ; while read -r l1 <&3 && read -r l2 <&4; do
+        [ "$l1" = "$l2" ] || printf "%s\n%s\n" "$l1" "$l2"
+      done 3<"${namebase}.1" 4<"${namebase}.2" \
+    | sed 's/\([\\"$`]\)/\\\1/g;s/^.*$/"&"/' \
+    | xargs -d"\n" -L2 echo 'mv -i --') \
+    > "${namebase}.sh"
+
+if [ "$(wc -c < "${namebase}.sh")" -ne 0 ] ; then
+    "$EDITOR" -- "${namebase}.sh"
+    sh -e -- "${namebase}.sh"
+fi
+
+rm -r -- "$(dirname "${namebase}")"