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Envsubst params (#1147)

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* Can give envsubst optional arguments
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Mike Farah
2022-03-20 10:56:50 +11:00
committed by GitHub
parent 1a964c5055
commit 78e9cc7998
7 changed files with 238 additions and 15 deletions
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pkg/yqlib/doc/operators/headers/env-variable-operators.md
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@@ -8,6 +8,17 @@ There are three operators:
- `envsubst` which you pipe strings into and it interpolates environment variables in strings using [envsubst](https://github.com/a8m/envsubst).
## EnvSubst Options
You can optionally pass envsubst any of the following options:
- nu: NoUnset, this will fail if there are any referenced variables that are not set
- ne: NoEmpty, this will fail if there are any referenced variables that are empty
- ff: FailFast, this will abort on the first failure (rather than collect all the errors)
E.g:
`envsubst(ne, ff)` will fail on the first empty variable.
See [Imposing Restrictions](https://github.com/a8m/envsubst#imposing-restrictions) in the `envsubst` documentation for more information, and below for examples.
## Tip
To replace environment variables across all values in a document, `envsubst` can be used with the recursive descent operator
as follows: