Admin/cvs-copy

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#!/usr/bin/env bash
#
# $Id$
#
# cvs-copy - make copy of CVS controlled directory hierarchy
#

## diagnostics

PRG=$(basename "$0")
THIS=$(cd $(dirname "$0"); echo "$PWD")

function usage()
{
  echo
  echo "Usage: $PRG FROMDIR TODIR"
  echo
  echo "  Make copy of CVS controlled directory hierarchy"
  exit 1
}

function fail()
{
  echo "$1" >&2
  exit 2
}


## process command line

[ "$#" -ne 2 ] && usage

FROMDIR="$1"; shift
TODIR="$1"; shift


## main

function copy ()
{
  local PREFIX="$1"
  local TYPE NAME REST

  [ -d "$FROMDIR/${PREFIX}CVS" ] || fail "Bad CVS directory '$FROMDIR/${PREFIX}.'"

  { cat "$FROMDIR/${PREFIX}CVS/Entries" || \
    fail "Cannot read '$FROMDIR/${PREFIX}CVS/Entries'"; } | \
  {
    ORIG_IFS="$IFS"
    IFS="/"
    while read TYPE NAME REST
    do
      if [ -n "$NAME" ]; then
        if [ "$TYPE" = D ]; then
          echo "X ${PREFIX}$NAME"
          mkdir -p "$TODIR/${PREFIX}$NAME" || fail "Bad directory '$TODIR/${PREFIX}$NAME'"
          copy "${PREFIX}$NAME/" || return "$?"
        else
          { [ ! -d "$TODIR/${PREFIX}$NAME" ] && \
            cp -af "$FROMDIR/${PREFIX}$NAME" "$TODIR/${PREFIX}$NAME"; } || \
          fail "Cannot install '$TODIR/${PREFIX}$NAME'"
        fi
      fi
    done
    IFS="$ORIG_IFS"
  }
}

mkdir -p "$TODIR" || fail "Bad directory '$TODIR'"
copy ""