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#!/bin/bash
# -*- Mode:Shell-script; Coding:us-ascii-unix; fill-column:158 -*-
################################################################################################################################################################
##
# @file      nuke_tex.sh
# @author    Mitch Richling <https://www.mitchr.me/>
# @brief     Find or delete TeX generated files@EOL
# @keywords  delete junk backup tex object
# @std       sh
# @copyright 
#  @parblock
#  Copyright (c) 1993,2016, Mitchell Jay Richling <https://www.mitchr.me> All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
#
#  1. Redistributions of source code must retain the above copyright notice, this list of conditions, and the following disclaimer.
#
#  2. 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.
#
#  3. Neither the name of the copyright holder 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.
#  @endparblock
# @filedetails
#
# Find .tex files, and nuke associated files generated by TeX and LaTeX in the CWD.  Extra files that have no associated .tex file will NOT be deleted -- for
# example, foo.dvi file will only be deleted if foo.tex is found in the CWD.  The only exception is a directory named 'auto' will be deleted if a any .tex file
# is fond in the CWD -- these get created by Emacs.
#
# Run against all directories with a .tex file (works with bash and zsh shells):
#    find ./ -name .git -prune -o \( -type f -a -iname '*.tex' -exec sh -c 'printf "%s\0" `dirname {}`' \; \) | uniq -z | sort -z | uniq -z | xargs -0 -n 1 nuke_tex.sh {}
#
################################################################################################################################################################

#---------------------------------------------------------------------------------------------------------------------------------------------------------------
read -r -d '' HELPT <<EOF
    nuke_crap.sh [opt]                             
      Options:                                     
        -d         Delete stuff (otherwise just print)
        -p         Print stuff (default)
        -x         Also delete html, ps, pdf, & dvi files
        -h         Print this message              
        -help      Print this message              
EOF

#---------------------------------------------------------------------------------------------------------------------------------------------------------------
DELETE='F'
DIRTOP=`pwd`
while test -n "$1"; do
   case "$1" in
    -d        ) DELETE='T';             shift;          ;; # Delete stuff
    -p        )                         shift;          ;; # Print stuff to delete
    -h        ) echo "$HELPT";          exit;           ;; # Print help
    -x        ) XTRA='html ps pdf dvi'; shift;          ;; # Also delete html, ps, pdf, & dvi files
    *         ) DIRTOP="$1";            shift;          ;; # Set maxdepth for find
   esac
done

#---------------------------------------------------------------------------------------------------------------------------------------------------------------
if [ -d "$DIRTOP" ] ; then
  AUTODONE='F'
  for f in "$DIRTOP"/*.tex; do
    bf=`echo $f | sed "s/.tex$//"`;
    act=N
    if [ -f "$bf.tex" ] ; then
      if [ -d "$DIRTOP/auto" -a "$AUTODONE" = 'F' ] ; then
        AUTODONE='Y'
        if [ "$act" = "N" ] ; then
          echo "==============================================================================="
          echo "TEX FILE: $f"
          act=Y
        fi
        if [ "$DELETE" = "T" ] ; then
          echo "  NUKING: auto"
          rm -rf auto
        else
          echo "NUKEABLE: auto"
        fi
      fi
      for e in snm vrb nav tex~ bak tex.bak lg idv aux toc log out hlog $XTRA; do
        if [ -f "$bf.$e" ] ; then
          if [ "$act" = "N" ] ; then
            echo "==============================================================================="
            echo "TEX FILE: $f"
            act=Y
          fi
          if [ "$DELETE" = "T" ] ; then
            echo "  NUKING: $bf.$e"
            rm -f "$bf.$e"
          else
            echo "NUKEABLE: $bf.$e"                        
          fi
        fi
      done
    fi
  done
else
  echo "ERROR: Directory not found: '$DIRTOP'!"
  echo " "
  echo "$HELPT"
fi