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|
#!/bin/sh
# Default value for the RMGDIFF_GUI environment variable.
: ${RMGDIFF_GUI:=/usr/bin/mgdiff}
#
# You shouldn't need to edit beneath here.
#
SHOW_FILE_TYPES="TRUE"
USE_CVS=""
DEBUG=""
USE_GUI="TRUE"
RMGDIFF_VERSION=""
Usage() {
cat <<-EOF
Usage: `basename "$0"` [-b] [-c] [-d] [-g <gui>] [-n] [-v] <dir1> <dir2>
-b: basic reporting (no file type info will be printed)
-c: cvs files will be included in diff
-d: print debugging information
-g: which gui to use
-n: no gui will pop up
-v: version
EOF
}
verify_exec () {
type "$1" 1>/dev/null 2>&1
if [ $? -ne 0 ] ; then
echo "$progname: Error: Unable to find executable for \"$1\"." >&2
exit 1
fi
}
# Some machines don't have a "readlink" command.
read_link_via_ls() {
if [ $# -ne 1 ] ; then
echo "$progname: Internal Error: Invalid args for" \
"readlink_via_ls: $@" >&2
exit 1
fi
\ls -l "$1" | sed -e 's|.*-> ||'
}
# Some machines don't have a "realpath" command. follow_link_via_ls
# does not pretend to be "realpath" because it will leave all sorts of
# cruft in the path string, but it should eventuall reach a regular
# file.
follow_link_via_ls() {
if [ $# -ne 1 ] ; then
echo "$progname: Internal Error: Invalid args for" \
"follow_link_via_ls: $@" >&2
exit 1
fi
local_iteration_count=0
local_iteration_max=1024
# Prime the pump.
local_tmp=
local_rv="$1"
while [ $local_iteration_count -lt $local_iteration_max ] ; do
if [ ! -h "$local_rv" ] ; then
break
fi
local_tmp=`read_link_via_ls "$local_rv"`
# The "read_link_via_ls" above could result in an absolute
# path or a relative one. The Solaris /bin/sh does not
# support "${PSTREE_AWK_SCRIPT#/}". So, use grep instead.
echo "$local_tmp" | grep '^/' >/dev/null 2>&1
if [ $? -ne 0 ] ; then
# The path given by readlink was relative. So, we have a
# little more work to do because we need to prepend the
# same path used to reach the original symlink.
local_tmp=`dirname "$local_rv"`/"$local_tmp"
fi
local_rv="$local_tmp"
local_iteration_count=`expr $local_iteration_count + 1`
done
if [ $local_iteration_count -ge $local_iteration_max ] ; then
echo "$progname: Error: Symbolic link nesting is too deep when" \
"following \"$1\"." >&2
exit 1
fi
echo "$local_rv"
}
#
# Script starts here.
#
progname="rmgdiff"
verify_exec "basename"
progname=`basename "$0"`
verify_exec "awk"
verify_exec "diff"
verify_exec "dirname"
verify_exec "expr"
verify_exec "file"
verify_exec "grep"
verify_exec "ls"
verify_exec "$RMGDIFF_GUI"
verify_exec "sed"
while getopts "bcdg:nv" OPT ; do
case "$OPT" in
b) SHOW_FILE_TYPES=""
;;
c) USE_CVS="TRUE"
;;
d) DEBUG="TRUE"
;;
g) RMGDIFF_GUI="$OPTARG"
;;
n) USE_GUI=""
;;
v) RMGDIFF_VERSION="TRUE"
;;
\?) Usage
exit 1
;;
esac
done
shift `expr $OPTIND - 1`
#
# Find the rmgdiff awk script. It is located in the same directory as
# this shell script after following all the symlinks.
#
lib_dir=`follow_link_via_ls "$0"`
RMGDIFF_AWK=`dirname "$lib_dir"`/rmgdiff.awk
# If the user just wants the version ...
if [ -n "$RMGDIFF_VERSION" ] ; then
exec awk -v version="$RMGDIFF_VERSION" -f "$RMGDIFF_AWK"
fi
if [ $# -lt 2 ] || [ $# -gt 2 ] ; then
Usage
exit 1
fi
if [ ! -d "$1" ] ; then
echo "$progname: dir1=\"$1\" is not a directory." 1>&2
exit 1
fi
if [ ! -d "$2" ] ; then
echo "$progname: dir2=\"$2\" is not a directory." 1>&2
exit 1
fi
LC_MESSAGES=C exec diff -rq "$1" "$2" | awk -v debug="$DEBUG" \
-v dir1="$1" \
-v dir2="$2" \
-v rmgdiff_gui="$RMGDIFF_GUI" \
-v show_file_types="$SHOW_FILE_TYPES" \
-v use_cvs="$USE_CVS" \
-v use_gui="$USE_GUI" \
-v version="$RMGDIFF_VERSION" \
-f "$RMGDIFF_AWK"
|
