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Refactor config updates (#13802)

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# Description
This PR standardizes updates to the config through a new
`UpdateFromValue` trait. For now, this trait is private in case we need
to make changes to it.

Note that this PR adds some additional `ShellError` cases to create
standard error messages for config errors. A follow-up PR will move
usages of the old error cases to these new ones. This PR also uses
`Type::custom` in lots of places (e.g., for string enums). Not sure if
this is something we want to encourage.

# User-Facing Changes
Should be none.
This commit is contained in:
Ian Manske
2024-10-11 09:40:32 -07:00
committed by GitHub
parent 02313e6819
commit fce6146576
32 changed files with 1343 additions and 1487 deletions
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59
crates/nu-protocol/src/config/hooks.rs
View File

@ -1,6 +1,5 @@
use super::prelude::*;
use crate as nu_protocol;
use crate::ShellError;
/// Definition of a parsed hook from the config object
#[derive(Clone, Debug, IntoValue, PartialEq, Serialize, Deserialize)]
@ -33,36 +32,36 @@ impl Default for Hooks {
}
}
/// Parse the hooks to find the blocks to run when the hooks fire
pub(super) fn create_hooks(value: &Value) -> Result<Hooks, ShellError> {
let span = value.span();
match value {
Value::Record { val, .. } => {
let mut hooks = Hooks::new();
for (col, val) in &**val {
match col.as_str() {
"pre_prompt" => hooks.pre_prompt = Some(val.clone()),
"pre_execution" => hooks.pre_execution = Some(val.clone()),
"env_change" => hooks.env_change = Some(val.clone()),
"display_output" => hooks.display_output = Some(val.clone()),
"command_not_found" => hooks.command_not_found = Some(val.clone()),
x => {
return Err(ShellError::UnsupportedConfigValue {
expected: "'pre_prompt', 'pre_execution', 'env_change', 'display_output', 'command_not_found'".into(),
value: x.into(),
span
});
}
}
impl UpdateFromValue for Hooks {
fn update<'a>(
&mut self,
value: &'a Value,
path: &mut ConfigPath<'a>,
errors: &mut ConfigErrors,
) {
fn update_option(field: &mut Option<Value>, value: &Value) {
if value.is_nothing() {
*field = None;
} else {
*field = Some(value.clone());
}
}
let Value::Record { val: record, .. } = value else {
errors.type_mismatch(path, Type::record(), value);
return;
};
for (col, val) in record.iter() {
let path = &mut path.push(col);
match col.as_str() {
"pre_prompt" => update_option(&mut self.pre_prompt, val),
"pre_execution" => update_option(&mut self.pre_execution, val),
"env_change" => update_option(&mut self.env_change, val),
"display_output" => update_option(&mut self.display_output, val),
"command_not_found" => update_option(&mut self.command_not_found, val),
_ => errors.unknown_option(path, val),
}
Ok(hooks)
}
_ => Err(ShellError::UnsupportedConfigValue {
expected: "record for 'hooks' config".into(),
value: "non-record value".into(),
span,
}),
}
}