just/src/command_ext.rs

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Rust
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2017-11-16 23:30:08 -08:00
use common::*;
pub trait CommandExt {
fn export_environment_variables<'a>(
&mut self,
scope: &Map<&'a str, String>,
exports: &Set<&'a str>
) -> Result<(), RuntimeError<'a>>;
}
impl CommandExt for Command {
fn export_environment_variables<'a>(
&mut self,
scope: &Map<&'a str, String>,
exports: &Set<&'a str>
) -> Result<(), RuntimeError<'a>> {
for name in exports {
if let Some(value) = scope.get(name) {
self.env(name, value);
} else {
return Err(RuntimeError::Internal {
message: format!("scope does not contain exported variable `{}`", name),
});
}
}
Ok(())
}
}