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Check if an environment variable is set #452

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9999years opened this issue Feb 29, 2024 · 1 comment · May be fixed by #454
Open

Check if an environment variable is set #452

9999years opened this issue Feb 29, 2024 · 1 comment · May be fixed by #454

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@9999years
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In Bash, it's very common to check if an environment is set and non-empty with [[ -n "${VAR:-}" ]]. We should provide helpers for this, like so:

hasEnv :: Text -> IO Bool
hasEnv = not . missingEnv

missingEnv :: Text -> IO Bool
missingEnv name = null $ fromMaybe "" $ need name
Gabriella439 added a commit that referenced this issue Mar 2, 2024
@Gabriella439
Support querying environment variable presence/absence
624abdc 
Fixes #452
@Gabriella439 Gabriella439 linked a pull request Mar 2, 2024 that will close this issue
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@Gabriella439
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Let me know if #454 looks okay to you

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Support querying environment variable presence/absence Gabriella439/turtle
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@Gabriella439 @9999years