tkcvs 8.2.3-1 / usr / share / doc / tkcvs / examples / cvsdiff

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#!/bin/sh

# Uses gvim to compare CVS versions.
# Written by Phil Brooks and Brent Geske at Mentor Graphics.
# To use with TkCVS, "set cvscfg(tkdiff) cvsdiff"

# Rudimentary arg check:
if [ ! $# -gt 0 ]
then
    echo "Usage:  $0 [-r revA] [-r revB] file [files ...]"
    exit 127
fi

unset   REV
unset   REVB

CVS=""
if [ -d CVS ]
then
    CVS="cvs update -p"
fi
if [ -d .svn ]
then 
    CVS="svn cat"
fi
if [ "$CVS" = "" ]
then
    echo "No CVS or .svn directory. Exiting."
    exit 1
fi

if [ "$1" = "-r" ]
then
    REV=$2
    shift; shift
else
    REV="HEAD"
fi

if [ "$1" = "-r" ]
then
    REVB=$2
    shift; shift
fi


# Presumed env vars:
if [ "$VDIFF" = "" ]
then
    VDIFF="gvim -d -f"
fi
if [ "$OS" = "Windows_NT" ]
then
    TMP="${SYSTEMDRIVE}/TEMP"
else
    TMP="/tmp"
fi

ME=`basename $0`
SCRIPTFILE="${TMP}/${ME}.script.$$"


# Get files

echo "" > $SCRIPTFILE

# loop once to generate diff commands for each file (also spit out some useful info)
for f in $*
do
    FILEPATH="$f"
    FILEBASE="`basename ${FILEPATH}`"
    TMPPATH="${TMP}/${REV}-${FILEBASE}"
    TMPPATHB="${TMP}/${REVB}-${FILEBASE}"

    if [ ! -r "${FILEPATH}" ]
    then
        echo "$0:  Local File '${FILEPATH}' not found."
        continue
    fi

    if [ "$REVB" != "" ] ; then
        echo -n "${REV} vs. ${REVB} ${FILEBASE}..."
    else
        echo -n "${REV} vs. LOCAL ${FILEBASE}..."
    fi

    $CVS -r${REV} $FILEPATH > $TMPPATH 2> /dev/null
    if [ "$REVB" != "" ] ; then
        $CVS -r${REVB} $FILEPATH > $TMPPATHB 2> /dev/null
    fi

    if [ -s "$TMPPATH" ]
    then
        if [ "$REVB" != "" ] ; then
            if [ -s "$TMPPATHB" ]; then
                echo "$VDIFF $TMPPATH $TMPPATHB >/dev/null &" >> $SCRIPTFILE
                echo -n "   :        diffcount ="
                diff $TMPPATH $TMPPATHB | grep '^[0-9]' | wc -l
            else
                echo "   :"
                echo "$0:  CVS revision ${REV} for '${FILEPATH}' not found."
            fi
        else
            echo "$VDIFF $TMPPATH $FILEPATH >/dev/null &" >> $SCRIPTFILE
            echo -n "   :        diffcount ="
            diff $TMPPATH $FILEPATH | grep '^[0-9]' | wc -l
        fi
    else
        echo "   :"
        echo "$0:  CVS revision ${REV} for '${FILEPATH}' not found."
    fi
done

echo "# wait for all diffs to finish, then cleanup temporaries" >> $SCRIPTFILE
echo "wait" >> $SCRIPTFILE

# loop again for cleanup
for f in $*
do
    FILEPATH="$f"
    FILEBASE="`basename ${FILEPATH}`"
    TMPPATH="${TMP}/${REV}-${FILEBASE}"
    TMPPATHB="${TMP}/${REVB}-${FILEBASE}"

    # loop for these:
    echo "rm -f '$TMPPATH' '$TMPPATHB'" >> $SCRIPTFILE
done

# One last step of non-looped cleanup stuff:
# Can the script remove itself?  YES.
echo "rm -f '$SCRIPTFILE'" >> $SCRIPTFILE

# Display files
. $SCRIPTFILE &

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