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

# In <file>, replace occurrences of
# - "$COPYRIGHT_MAN" by the contents of the file cache/copyright.man.
# - "$COPYRIGHT_TXT" by the contents of the file cache/copyright.txt.
# - "$DATE"          by the YYYY-MM-DD current time,
# - "$FILES_ETC"     by the contents of the file obj/0/file_etc.man
# - "$FILES_SHARE"   by the contents of the file obj/0/file_share.man
# - "$SELF_DATE"     by the YYYY-MM-DD mtime of <file>,
# - "$SOURCE_DATE"   by the contents of the file cache/srcdate,
# - "$VERPREV"       by the contents of the file ./VERPREV.
# - "$VERSION"       by the contents of the file ./VERSION.
# Output is written on stdout.

file=$1
shift
sed -e "/\$COPYRIGHT_MAN/ {
	  r cache/copyright.man
	  d
	}
	/\$COPYRIGHT_TXT/ {
	  r cache/copyright.txt
	  d
	}
	/\$FILES_ETC/ {
	  r obj/0/files_etc.man
	  d
	}
	/\$FILES_SHARE/ {
	  r obj/0/files_share.man
	  d
	}
	s/\$DATE/`date +%Y-%m-%d`/g
	s/\$SELF_DATE/`obj/0/ftime -d $file`/g
	s/\$SOURCE_DATE/`cat cache/srcdate`/g
	s/\$VERPREV/`test -r VERPREV && cat VERPREV`/g
	s/\$VERSION/`cat VERSION`/g" $file