CODEWITHSUNDEEP
bashshell
Jian
Jian

Reputation: 11070

Cause bash statement to error if its subshell errors

Is there a concise, general, idiomatic bash construction that would force a statement to error when a subshell it invokes errors? For example,

cd $(git rev-parse --show-toplevel)

will invariably return 0 even if the git command errors, which makes it difficult to script something like

cd $(git rev-parse --show-toplevel) && echo 'Success!'

Of course you can just do the following, but I was wondering if there was a better way:

DIR=$(git rev-parse --show-toplevel) && cd $DIR && echo 'Success!'

Upvotes: 3

Views: 90

Answers (1)

Ross Ridge
Ross Ridge

Reputation: 39591

It's not quite a general solution, but in that example you could do:

cd $(git rev-parse --show-toplevel || echo -@) && echo 'Success!'

This solution works by turns the output into something that the command won't accept if the command in the substitution fails.

Upvotes: 1

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