#! /bin/sh -p
#
# depend
#
# Shell script to find other packages that depend (via includes) on the 
# specified package.  
#
# The user can then call lnkpkg to create links to the $BFDIST/packages 
# area for each of the listed packages.
#
# Or can do this at the file level using the -f option, listing all 
# packages and files that depend on the specified package and file.
#
# Glenn Cooper Jan 1997
# Glenn Cooper, Feb 19, 1997: add -f option
# Glenn Cooper, Feb 21, 1997: several speedups in searching
# A.M.Jonckheere, May 1, 1998: 
#    1) the test for "depend <pkg>" was always true, so it merely 
#       returned a list of all packages. 
#    2) the same test above didn't discriminate between packages
#       that begin with the same string as another: ie) depend abc
#       would return packages that depended on abc, abcd, abcde etc
#    3) In .d files created by KCC, the source file field sometimes
#       is just the file name and sometimes the full path to the file.
#       Added a filter on the $srcfile output: `basename $srcfile`.
#       This takes care of both cases.
#
# Function:
#
#   Search the .d files in 
#     $BFDIST/releases/<release>/tmp/<arch>/<package>
#   for mention of the specified package [and file].
#
#
# Options:
#   -f  List dependencies at the file level
#   -q  Quiet mode: suppress notices, only print list of packages or files
#
# Arguments:
#   <package[/file]>  Package [and file] name
#   <release>         Optional: if present, check this release for dependencies
#                               if not present, use release listed in .current
#
# Examples:
#   depend geom [current]
#   depend -f geom/CdfGeometry.hh
#
##########################################################################

USAGE="Usage:  $0 [-fq] package[/file] [release]"

# process options
ckfiles=0
quiet=0
#set -v
#set -x

#amj:FNAL: getopts has replaced getopt as recommended usage on SGI and 
#          DECUnix. Only getopts exists in the cygnus NT system.

while getopts fq c
do
  case $c in
    f) ckfiles=1;;
    q) quiet=1;;
  esac
done
shift `expr $OPTIND - 1`

# check for correct number of arguments
if [ "$#" -gt 2 -o "$#" -lt 1 ]; then
    echo "Error: $0 requires one or two arguments:"
    echo $USAGE
    exit 2
fi

# if first argument looks like xxx/yyy, check for -f flag
if [ `echo $1 | awk -F/ '{print NF}'` -gt 1 ]; then
  if [ $ckfiles = 0 ]; then
    echo "Please specify the -f option if you want to list\c"
    echo " file-level dependencies."
    echo $USAGE
    exit 2
  fi
fi

# if release wasn't specified, tell user we're using one from .current
if [ "$#" -eq 2 ]; then
  release=$2
else
  if [ -r ./.current ]; then
    release=`cat ./.current`
    if [ $quiet = 0 ]; then
      echo "No release specified; will check release $release."
    fi
  else
    echo "No release specified, and can't find .current in directory"
    echo "  $PWD."
    echo "Please specify a release, or issue the $0 command from "
    echo "the directory you created with newrel."
    exit 2
  fi
fi


# make sure the release we're checking exists, then go there
if [ -r $BFDIST/releases/$release/tmp/$BFARCH ]; then
  cd $BFDIST/releases/$release/tmp/$BFARCH
else
  if [ -d $BFDIST/releases/$release ]; then
    echo Error:  tmp/$BFARCH area for release $release not found.
  else
    echo Error: release $release does not exist.  Available releases are:
    ls $BFDIST/releases
  fi
  exit 2
fi

# now search for dependencies, and print them
if [ $ckfiles = 0 ]; then	# list package dependencies
  if [ $quiet = 0 ]; then
    echo "These packages in release $release use include files from package $1:"
  fi
  for pkg in *
  do
    if [ "`grep -l /include/$1/ $pkg/* 2>/dev/null`" ]; then
      echo "$pkg \c"
    fi
  done
  echo " "
else				# list file dependencies
  if [ $quiet = 0 ]; then
    echo "These files in release $release include file $1:"
  fi
  depfiles=`find . -type f -name "*.d" -print | xargs grep -l /$1`
  for file in $depfiles
  do
    pkg=`echo $file | awk -F/ '{print $(NF-1)}'`
    srcfile=`head -1 $file | awk -F: '{print $2}'`
    echo $pkg/`basename $srcfile`
  done
fi

exit 0