#!/bin/bash
#
#       strip-cr-file file [--preserve-mtime]
#
# Uses strip-cr on a file.
# To convert an entire directory of files, use something like:
#
#       find target/ -type f -exec strip-cr-file {} \;
#
# --preserve-mtime
#
#   Leaves the modification time untouched.
#   Unfortunately, the change time (per stat) must change,
#   because there are no tools (neither Linux's touch, nor Perl) that can correct it.
#

    if [ -f /tmp/strip ]; then
        rm /tmp/strip || exit 1 # clean up early, after previous mess
        fi

    if [ $2 ]; then
        if [ $2 == --preserve-mtime ]; then
            preserve=1
        else
            echo unrecognized option: $2
            exit 1
            fi
        fi

    is-text $1 || exit;
  # mv -f $1 /tmp/strip
  ## but changes attributes when the file is later recreated
  ## also fails between # this is better:
    cp --preserve $1 /tmp/strip || exit 1;
  ## though it still stats with a different "Change" time
    strip-cr < /tmp/strip > $1

    [ $preserve ] && touch -r /tmp/strip $1
    rm /tmp/strip # don't block other users