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vash(1) --helpers <file>
A file can be passed in, and thus when paired with --render, can enable helpers via command line. A complex example: cat myTpl.vash | bin/vash --render --helpers \ <(cat helpers/* | bin/vash --helper) This example grabs all the files in the helpers directory, compiles them as helpers, and then passes them as a temporary named pipe into another call to vash(1) that is rendering myTpl.vash.
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