25 lines
663 B
Plaintext
25 lines
663 B
Plaintext
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== Why is this an issue?
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Unwrapping the result of `option_env!` will panic at runtime if the environment variable doesn't exist, whereas `env!` catches it at compile-time, ensuring safer code execution.
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=== Code examples
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==== Noncompliant code example
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[source,rust,diff-id=1,diff-type=noncompliant]
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---_
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let _ = option_env!("HOME").unwrap(); // Noncompliant: Can panic at runtime.
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---_
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==== Compliant solution
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[source,rust,diff-id=1,diff-type=compliant]
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---_
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let _ = env!("HOME"); // Compliant: Ensures compile-time checking.
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---_
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== Resources
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=== Documentation
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* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#option_env_unwrap
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