#!/bin/bash
#PGR facit
parms=1      # How many parameters must it have?
usage="Usage: pod COMMAND [PARM]
Action: pod is a collection of quick and dirty little scripts that aid
pod development.

mkdist:		PARM = destination_directory

  Make tarballs of the system's build scripts, installed files, patches,
  uninstall scripts, tarballs, and cloning execs, i.e. what we need to
  write a release candidate CD/DVD.
---
rename:		PARM = pkg-now pkg-new

  Renames a pod package in build scripts, pio uninstall and backup files,
  then fixes-up dependencies.
---
fixtimes:	PARM =

  Fixes timestamps on pio's uninstall scripts to match the time its
  header says it was run.
---
listpod:	PARM =

  List the POD built packages, i.e. omit the LFS packages.
---
listlfs:	PARM =

  List the LFS built packages, i.e. omit the POD packages.
---
collect:	PARM = package_name

  Collect a package's uninstall script, installed files, build script, and
  source tarball into one tarball useful for updates
---
chkup:		PARM = collection1 [collection2 ... collectionN]

  Go through a collected update looking for the updated files.
---
xdeps:		PARM =

  Cross reference dependencies on stdout.
  pkg1 requires pkg2:	pkg1 ==> pkg2
  			pkg2 <== pkg1
  pkg1 uses pkg2:	pkg1 --> pkg2
  			pkg2 <-- pkg1
"

function doit () {
  # get to it
  command=$1
  shift
  case $command in
  mkdist)
    if [ $1 = "" ]; then
      echo "No destination given"
    else
      here=`pwd`
      mkdir -p $1
      cd /usr/local
      echo "Compressing pio scripts"
      tar -czpf $1/pio.tgz pio/*-* --exclude=kernel\*
      cd pio
      echo "Tarballing asbuilt binaries"
      tar -cpf $1/backups.tar backups/ --exclude=kernel\*
      cd /usr/local/src/
      echo "Compressing patches"
      tar -czpf $1/patches.tgz patches/
      echo "Compressing build scripts"
      tar -czpf $1/scripts.tgz scripts/
      echo "Tarballing source tarballs"
      tar -cpf $1/tarballs.tar tarballs/
      # Sometimes this may have been moved around
      ex=`find / -xdev -type d -name execs`
      if [ $ex ]; then
	cd $ex
	cd ..
        echo "Compressing execs at " $ex
	tar -czpf $1/execs.tgz execs
	      else
	echo "execs directory not found"
      fi
      cd $here
    fi
  ;;
  rename)
    if [ $# -eq 2 ]; then
      # rename script
      mv /usr/local/src/scripts/$1 \
         /usr/local/src/scripts/$2
      # rename as-installed backup
      mv /usr/local/pio/backups/$1.tgz \
         /usr/local/pio/backups/$2.tgz
      # rename the removal script
      mv /usr/local/pio/$1 \
         /usr/local/pio/$2
      # change references in pio scripts
      # (catch self-reference, and dependencies in others)
      for fn in `ls /usr/local/pio/*-*`	# avoid backups/
      do
        grep -q $1 $fn		# sets return code 0 when found
        if [ $? -eq 0 ]; then
          mtime=mktemp
          touch -r $fn $mtime
          sed -i 's/'$1'/'$2'/' $fn	# $1 & $2 are exposed for substitution
          touch -mr $mtime $fn
          rm -f $mtime
        fi
      done
    else
      echo "Now and new names not given"
    fi
  ;;
  fixtimes)
    for i in `ls /usr/local/pio/*-*`
     do
      echo $i
      touch -t `gawk '/# created by/{
       month["Jan"]=1
       month["Feb"]=2
       month["Mar"]=3
       month["Apr"]=4
       month["May"]=5
       month["Jun"]=6
       month["Jul"]=7
       month["Aug"]=8
       month["Sep"]=9
       month["Oct"]=10
       month["Nov"]=11
       month["Dec"]=12
       split($12,time,":")
       printf("%4d%02d%02d%02d%02d.%02d",$14,month[$10],$11,time[1],time[2],time[3]) }' $i` $i
     done
  ;;
  listpod)
    ls /usr/local/pio/ |\
    grep -v ch[4-8] |\
    awk -F- '{OFS="-";print $3, $4, $5, $6, $7}' |\
    sed -e 's/---$//' -e 's/--$//' -e 's/-$//' |\
    grep "-" |\
    sort
  ;;
  listlfs)
    ls /usr/local/pio/ |\
    grep ch[4-8] |\
    awk -F- '{OFS="-";print $3, $4, $5, $6, $7}' |\
    sed -e 's/---$//' -e 's/--$//' -e 's/-$//' |\
    grep "-" |\
    sort
  ;;
  collect)
    if [ $1 = "" ]; then
      echo "No package name given"
    else
      # pull apart argument
      wg=${1#*-}	# without group
      ws=${wg#*-}	# without group & sequence number
      wv=${ws%-*}	# without version
      vn=${ws##*-}	# version number
      src=`find /usr/local/src/tarballs -iname "${ws}*" -print`
      # if it's null, i.e. not found, try with "_" replaced by "-"
      # duplicates ARE possible, quote it
      if [ ! "$src" ]; then
	tr=${ws//_/-}
	src=`find /usr/local/src/tarballs -iname "${tr}*" -print`
      fi
      # list of patches in the build script
      patches=`grep "../patches" /usr/local/src/scripts/$1 | \
               sed 's/&&//' | \
               sed 's:patch -Np1 -i ..:/usr/local/src:'`
      tar cvpPf $1.tar \
	/usr/local/pio/$1 \
	/usr/local/pio/backups/${1}.t* \
	/usr/local/src/scripts/$1 \
	$src \
	$patches
    fi
  ;;
  chkup)
    tempfile=`mktemp -p /var/run`	# in a tempfs
    while [ $1 ]
    do
      tar tvPf $1 >$tempfile
      while read tarred_file
      do
        tarred_data=`echo $tarred_file|cut -d " " -f 3-6`
        fn=${tarred_data##*" "}
        current_data=`ls -l --time-style=long-iso $fn|cut -d " " -f 5-8`
        if [ "$tarred_data" = "$current_data" ]; then
          echo "OK: " $fn
        else
         echo "Fix: "$fn
         echo "Update:"$tarred_data	# It's hard for me to suggest what
         echo "Active:"$current_data	# the fix would be, easy for you.
        fi
      done < $tempfile
      shift
    done
    rm -f $tempfile
  ;;
  xdeps)
    i=`mktemp`
    o=`mktemp`
    pio --deps > $i
    awk '/requires/ {print $1,"==>",$3,"\n" $3,"<==", $1}' <$i >$o
    awk '/uses/ {print $1,"-->",$3,"\n" $3,"<--",$1}' <$i >>$o
    sort <$o|column -c 3 -t
    rm -f $i $o
  ;;
  *)
  echo "unknown command:" $command
  ;;
  esac
}

case $* in
  -[?h]) echo "$usage"
    ;;
  --help) echo "$usage"
    ;;
  *)
    if [ $# -ge $parms ]; then
      doit "$@"
    else
      echo "$usage"
    fi
    ;;
esac