Suppose I have a command
See the help for
pipeline, in particular:
run(pipeline(`echo hello`, stdout=STDOUT, stderr=STDOUT))
which will redirect both to the same stream (the process
STDOUT). This can be something else also.
Here is the help you can get from the REPL:
help?> pipeline search: pipeline pipeline(command; stdin, stdout, stderr, append=false) Redirect I/O to or from the given command. Keyword arguments specify which of the command's streams should be redirected. append controls whether file output appends to the file. This is a more general version of the 2-argument pipeline function. pipeline(from, to) is equivalent to pipeline(from, stdout=to) when from is a command, and to pipeline(to, stdin=from) when from is another kind of data source. Examples: run(pipeline(`dothings`, stdout="out.txt", stderr="errs.txt")) run(pipeline(`update`, stdout="log.txt", append=true)) pipeline(from, to, ...) Create a pipeline from a data source to a destination. The source and destination can be commands, I/O streams, strings, or results of other pipeline calls. At least one argument must be a command. Strings refer to filenames. When called with more than two arguments, they are chained together from left to right. For example pipeline(a,b,c) is equivalent to pipeline(pipeline(a,b),c). This provides a more concise way to specify multi-stage pipelines. Examples: run(pipeline(`ls`, `grep xyz`)) run(pipeline(`ls`, "out.txt")) run(pipeline("out.txt", `grep xyz`))
Also, you should upgrade to at least Julia 0.5. 0.4 is no longer supported, and 0.6 will be released shortly.