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Adds allow_unset field for variables #3273

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Adds allow_unset field for variables #3273

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4 changes: 2 additions & 2 deletions crates/loader/src/local.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -607,8 +607,8 @@ fn locked_metadata(

fn locked_variable(variable: v2::Variable) -> Result<locked::Variable> {
ensure!(
variable.required ^ variable.default.is_some(),
"must be `required` OR have a `default`"
variable.required ^ variable.default.is_some() ^ variable.allow_unset,
"must be `required` OR have a `default` OR set to `allow_unset`"
);
Ok(locked::Variable {
description: variable.description,
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7 changes: 7 additions & 0 deletions crates/manifest/src/schema/common.rs
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Expand Up @@ -41,6 +41,13 @@ pub struct Variable {
/// Learn more: https://spinframework.dev/variables#adding-variables-to-your-applications
#[serde(default, skip_serializing_if = "is_false")]
pub secret: bool,
/// If set, the variable may be unset.
///
/// Example: `allow_unset = true`
///
/// Learn more: https://spinframework.dev/variables#adding-variables-to-your-applications
#[serde(default, skip_serializing_if = "is_false")]
pub allow_unset: bool,
}

/// The file, package, or URL containing the component Wasm binary. This may be:
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