On 02/14/2011 11:29 AM, Paul Gilmartin wrote: > 'callpipe var dataline | append *.input: | *.output:'
Think for a second about the context of *.input: here. It's being used in a pipeline added by APPEND, so it refers to APPEND's input, not the input of your stage that issued the CALLPIPE. It will never find anything to append, because it's already read the entire input stream. If the output varies, that's only because the contents of DATALINE vary. You want it the other way around: 'callpipe *: | preface var dataline | *:' Or, using FANIN: 'callpipe (end /) var dataline | a: fanin | *: / *: | a:' Unless you're doing something with the value of DATALINE inside that called pipeline, though, using VAR makes this slightly more costly, not less, since it adds the overhead of the EXECCOMM interface. And do you need to wait for the added pipeline to complete before this stage does something else? If not, the SHORT subcommand would save the tiny extra overhead of parsing and setting up the new pipeline: 'output' dataline 'short' ¬R
