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|
#! /bin/sh
# This file is part of CSSC.
# # @configure_input@
# Usage:
# sccsdiff [-p] -rsid -rsid [diff-options] s.filename
#
# $Id: sccsdiff.sh.in,v 1.10 2004/10/17 11:45:13 james_youngman Exp $
# LOG $Log: sccsdiff.sh.in,v $
# LOG Revision 1.10 2004/10/17 11:45:13 james_youngman
# LOG Fixed SourceForge bug 966010, sccs sccsdiff -r cannot have space
# LOG before revision number. We still will have similar problems
# LOG elsewhere in the suite, I suspect.
# LOG
# LOG Revision 1.9 2001/11/25 16:01:38 james_youngman
# LOG Corrected a syntax error.
# LOG
# LOG Revision 1.8 2001/11/25 14:27:54 james_youngman
# LOG fixed Debian Bug#120080: sccs sccsdiff doesn't work (sccsdiff assumes /usr/sccs symlink exists)
# LOG
# LOG Revision 1.7 1998/03/10 00:22:00 james
# LOG Support for filenames containing spaces.
# LOG
# LOG Revision 1.6 1998/03/09 23:25:00 james
# LOG Bug report from Richard Polton: IRIX's pr(1) requires a space between
# LOG the "-h" and its argument.
# LOG
# LOG Revision 1.5 1998/02/09 21:00:19 james
# LOG Patch from Maurice O'Donnell <mod@tfn.com>: pass "-e" to sed before
# LOG the sed commands.
# LOG
# LOG Revision 1.4 1998/01/24 14:15:13 james
# LOG SCCS compatibility fix -- When "get" fails, exit with value 1, not 2.
# LOG
# LOG Revision 1.3 1997/12/19 20:40:35 james
# LOG Modified version of sccsdiff arrived from Richard Polton; took the
# LOG ideas onboard for a rewrite of sccsdiff.
# LOG
# LOG Revision 1.2 1997/05/04 14:52:02 james
# LOG Have to enclose the version string in single rather than double
# LOG quotes, to protect the dollar signs from shell expansion.
# LOG
# LOG Revision 1.1 1997/05/04 14:49:22 james
# LOG Initial revision
# Values substituted by configure:-
pr=@PR@ # The location of the pr(1) command
diff=@CONFIG_DIFF_COMMAND@ # The location of the diff(1) command
# Find the "get" command. The last value tested is "get", and
# that's what we use if we can't find get in any other location.
if test x$get = x
then
# The CSSC Makefile performs a sed substitution on the next line.
for get in "__csscutildir__/get" /usr/sccs/get get
do
if [ -x "$get" ]
then
break
fi
done
fi
version='$Revision: 1.10 $ $State: Exp $'
usage() {
cat <<EOF
$0 [-p] -rsid -rsid [diff-options] s.filename [s.secondfile...]
EOF
}
use_pr=false
first_sid=
second_sid=
diff_options=
sccs_files=
while test $# -gt 0
do
case "$1" in
--help)
usage
exit 0
;;
--version)
echo "$version"
exit 0
;;
-p) use_pr=true
shift
;;
-r*)
# Cope with "-r 1.1" or "-r1.1":
if test x-r = x"$1"
then
# SID is next argument.
arg=-r"$2"
shift;
else
# SID imediately follow the "-r", in the same argument.
arg="$1"
fi
if test x"$first_sid" = x
then
first_sid="$arg"
else
if test x"$second_sid" = x
then
second_sid="$arg"
else
exec >&2
usage
echo "Too many -r options."
exit 1
fi
fi
shift
;;
-*)
diff_options="${diff_options} $1"
shift
;;
*)
# That is an SCCS file, leave it and everything
# following it in $*.
break
;;
esac
done
# Show what we got...
## echo "use_pr=" $use_pr
## echo "first SID=" $first_sid
## echo "second SID=" $second_sid
## echo "diff options=" $diff_options
## echo "SCCS files=" $*
## echo \$\# = $#
if test x$second_sid = x
then
exec >&2
echo Two SIDs must be specified with the -r option.
usage
exit 1
fi
# Remove the leading "-r" from $first_sid and $second_sid
# so that we can echo the correct string as the header line
# introducing the diff.
first_sid=`echo $first_sid | sed -e 's/^-r//' `
second_sid=`echo $second_sid | sed -e 's/^-r//' `
getprefix=/tmp/get.$$.
g1="${getprefix}${first_sid}"
g2="${getprefix}${second_sid}"
dfile=${getprefix}d${first_sid}${second_sid}
while test $# -gt 0
do
rm -f "$g1" "$g2" "$dfile"
sccsfile="$1"
shift
header="$sccsfile: $first_sid vs. $second_sid"
${get:-get} -r$first_sid -s -k "-G${g1}" "${sccsfile}" || {
exec >&2
echo "Failed to get version $first_sid from $sccsfile"
exit 1
}
${get:-get} -r$second_sid -s -k "-G${g2}" "${sccsfile}" || {
rm -f "$g1"
exec >&2
echo "Failed to get version $second_sid from $sccsfile"
exit 1
}
# in case noclobber is set...
rm -f "$dfile"
# Ignore return value of diff since it just tells us
# if the two files are different.
"$diff" $diff_options "$g1" "$g2" > "$dfile"
if test -f "$dfile"
then # Output file exists.
if test -s "$dfile"
then # Output file is not empty.
if $use_pr
then
$pr -h "$header" < $dfile
else
echo $header
cat "$dfile"
fi
else # Output file is empty.
echo No differences.
fi
else # No output file at all!
echo "$diff produced no output file." >&2
exit 2
fi
done # Loop over all named SCCS files.
rm -f "$g1" "$g2" "$dfile"
exit 0
# Local Variables:
# Mode: shell
# End:
|
