Support ${VAR:?err} syntax for mandatory variables#5531
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Signed-off-by: Joffrey F <joffrey@docker.com>
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This was referenced Mar 6, 2018
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Is it possible to instead make this spit out all the missing variables in one pass, and also specify what variable it is that's actually missing? Right now you get something like: unless you write a custom error message for each one, which is fairly tedious for files in which variables are interpolated in lots of places. |
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Fixes #5505