#!/bin/sh
#
#	process - expand certain macro expressions in text files
#	Usage: process <file> [<reffile> ...]
#	AYM 1999-08-13
#

# In <file>, replace occurrences of
# - "$DATE"        by the YYYY-MM-DD current time,
# - "$SELF_DATE"   by the YYYY-MM-DD mtime of <file>,
# - "$SOURCE_DATE" by the YYYY-MM-DD mtime of the most recent reffile,
# - "$VERSION"     by the contents of the file ./VERSION.
# Output is written on stdout.

file=$1
shift
sed -e "s/\$DATE/$(date +%Y-%m-%d)/;
	s/\$SELF_DATE/$(find $file -printf '%TY-%Tm-%Td')/;
	s/\$VERSION/$(cat VERSION)/" $file