#! /bin/sh

# This script accepts any number of file arguments and checks them into RCS.
#
# Arguments which are detectably either RCS masters (with names ending in ,v)
# or Emacs version files  (with names of the form foo.~<number>~) are ignored.
# For each file foo, the script looks for Emacs version files related to it.
# These files are checked in as deltas, oldest first, so that the contents of
# the file itself becomes the latest revision in the master.
#
# The first line of each file is used as its description text.  The file itself
# is not deleted, as under VC with vc-keep-workfiles at its default of t, but
# all the version files are.
#
# If an argument file is already version-controlled under RCS, any version 
# files are added to the list of deltas and deleted, and then the workfile
# is checked in again as the latest version.  This is probably not quite
# what was wanted, and is the main reason VC doesn't simply call this to
# do checkins.
#
# This script is intended to be used to convert files with an old-Emacs-style
# version history for use with VC (the Emacs 19 version-control interface),
# which likes to use RCS as its back end.  It was written by Paul Eggert
# and revised/documented for use with VC by Eric S. Raymond, Mar 19 1993.

case $# in
0)
	echo "rcs-checkin: usage: rcs-checkin file ..."
	echo "rcs-checkin: function: checks file.~*~ and file into a new RCS file"
	echo "rcs-checkin: function: uses the file's first line for the description"
esac

# expr pattern to extract owner from ls -l output
ls_owner_pattern='[^ ][^ ]*  *[^ ][^ ]*  *\([^ ][^ ]*\)'

for file
do
	# Make it easier to say `rcs-checkin *'
	# by ignoring file names that already contain `~', or end in `,v'.
	case $file in
	*~* | *,v) continue
	esac
	# Ignore non-files too.
	test -f "$file" || continue

	# Check that file is readable.
	test -r "$file" || exit

	# If the RCS file does not already exist,
	# initialize it with a description from $file's first line.
	rlog -R "$file" >/dev/null 2>&1 ||
	rcs -i -q -t-"`sed 1q $file`" "$file" || exit

	# Get list of old files.
	oldfiles=`
		ls $file.~[0-9]*~ 2>/dev/null |
		sort -t~ -n +1
	`

	# Check that they are properly sorted by date.
	case $oldfiles in
	?*)
		oldfiles_by_date=`ls -rt $file $oldfiles`
		test " $oldfiles
$file" = " $oldfiles_by_date" || {
			echo >&2 "rcs-checkin: skipping $file, because its mod times are out of order.

Sorted by mod time:
$oldfiles_by_date

Sorted by name:
$oldfiles
$file"
			continue
		}
	esac

	echo >&2 rcs-checkin: checking in: $oldfiles $file

	# Save $file as $file.~-~ temporarily.
	mv "$file" "$file.~-~" || exit

	# Rename each old file to $file, and check it in.
	for oldfile in $oldfiles
	do
		mv "$oldfile" "$file" || exit
		ls_l=`ls -l "$file"` || exit
		owner=-w`expr " $ls_l" : " $ls_owner_pattern"` || owner=
		echo "Formerly ${oldfile}" | ci -d -l -q $owner "$file" || exit
	done

	# Bring $file back from $file.~-~, and check it in.
	mv "$file.~-~" "$file" || exit
	ls_l=`ls -l "$file"` || exit
	owner=-w`expr " $ls_l" : " $ls_owner_pattern"` || owner=
	ci -d -q -u $owner -m"entered into RCS" "$file" || exit
done