mulle-change-tap

#! /usr/bin/env bash
#
#   Copyright (c) 2017 Nat! - Mulle kybernetiK
#   All rights reserved.
#
#   Redistribution and use in source and binary forms, with or without
#   modification, are permitted provided that the following conditions are met:
#
#   Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
#   Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
#   Neither the name of Mulle kybernetiK nor the names of its contributors
#   may be used to endorse or promote products derived from this software
#   without specific prior written permission.
#
#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
#   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
#   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
#   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
#   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
#   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
#   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
#   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
#   POSSIBILITY OF SUCH DAMAGE.
#

usage()
{
   cat <<EOF >&2
Usage:
   mulle-objc-change-tap <command> <old> <new>

   Change the tap from <old> to <new>. A tap looks like:
      mulle-kybernetik/software/

Command:
      documentation : change all .md files
      all           : documentation
EOF
   exit 1
}


fail()
{
   echo "error: $*" >&2
   exit 1
}


escaped_sed_pattern()
{
   sed -e 's/[]\/$*.^|[]/\\&/g' <<< "${1}"
}


sed_inline_replace()
{
   local eflag

   eflag="-e"

   case "`uname -s`" in
      Darwin)
         eflag="-E"
      ;;
   esac

   sed -i ".bak" "${eflag}" "$@"
}


tagged_line_replace()
{
   local filename="$1"

   if fgrep -s "__publisher-replace__" "${filename}" | fgrep -s "${OLD_TAP}" > /dev/null
   then
      echo "Tagged line replacing \"${OLD_TAP}\" with \"${NEW_TAP}\" in \"${filename}\"..." >&2
      sed_inline_replace "/__publisher-replace__/${SED_TAP_REPLACE}" "${filename}"
   fi
}


hack_documentation()
{
   #
   # go through documentation
   #
   IFS="
   "
   for file in `find . -name "*.md" -not -path '*/\.*' -print`
   do
      filename="`basename -- ${file}`"
      case "${filename}" in
         */dependencies/*|*/addictions/*|*/tests*/|*/build/*)
         ;;

         RELEASE*|release*|[0-9]*)
         ;;

         *)
            tagged_line_replace "${file}"
         ;;
      esac
   done
}


main()
{
   local cmd

   case "$1" in
      all|documentation)
         cmd="hack_$1"
      ;;

      ""|*)
         usage
      ;;
   esac
   shift

   [ $# -eq 0 ] && usage
   OLD_TAP="$1"
   shift

   [ $# -eq 0 ] && usage
   NEW_TAP="$1"
   shift

   [ "${OLD_PUBLISHER}" = "${NEW_TAP}" ] && fail "no change in tap"
   [ -z "${OLD_TAP}" ] && fail "empty old tap"
   [ -z "${NEW_TAP}" ] && fail "empty new tap"

   SED_TAP_REPLACE="s/`escaped_sed_pattern "${OLD_TAP}"`/`escaped_sed_pattern "${NEW_TAP}"`/g"

   "$cmd" "$@"
}


main "$@"