finish generate-file-from

README

@@ -67,3 +67,10 @@ PS. the Makefile now uses absolute paths; this means, you can do:
  somehost:/etc/ssh# ln -s /opt/chj/ssh-config-gen/Makefile
 
 and then just run 'make' from /etc/ssh/.
+
+There's also generate-file-from, which allows you to write your own
+Makefile with an entry like:
+
+ data: data-in
+	 /opt/chj/ssh-config-gen/generate-file-from data data-in
+

generate-file-from

@@ -2,10 +2,13 @@
 
 set -eu
 
-w=`whami`
+to="$1"
+from="$2"
 
-/opt/chj/ssh-config-gen/filter_file assign-in \
+w="${WHAMI-`whami`}"
+
+/opt/chj/ssh-config-gen/filter_file "$from" \
 | cpp -Dnetwork_"$w"=1 \
-| filter_whitespace > assign.new
+| /opt/chj/bin/filter_whitespace > ."$to".new
 
-mv assign.new assign
+mv ."$to".new "$to"