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Improve error message handling for theme loading failures (#5073)

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The error messages for a theme that failed to be deserialized (or
otherwise failed to load) were covered up by the context/with_context
calls:

* The log message for a bad theme configured in config.toml would only
  say "Failed to deserilaize theme"
* Selecting a bad theme via :theme would show "Theme does not exist"

With these changes, we let the TOML deserializer errors bubble up, so
the error messages can now say the line number of a duplicated
key - and that key's name - when a theme fails to load because of a
duplicated key.

Providing a theme which does not exist to :theme still gives a helpful
error message: "No such file or directory."
This commit is contained in:
Michael Davis 2022-12-15 02:49:49 -06:00 committed by GitHub
parent 012fc12f97
commit db939801eb
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2 changed files with 3 additions and 2 deletions
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2
helix-term/src/commands/typed.rs
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@ -777,7 +777,7 @@ fn theme(
.editor
.theme_loader
.load(theme_name)
.with_context(|| "Theme does not exist")?;
.map_err(|err| anyhow::anyhow!("Could not load theme: {}", err))?;
if !(true_color || theme.is_16_color()) {
bail!("Unsupported theme: theme requires true color support");
}

3
helix-view/src/theme.rs
View file

@ -136,8 +136,9 @@ impl Loader {
// Loads the theme data as `toml::Value` first from the user_dir then in default_dir
fn load_toml(&self, path: PathBuf) -> Result<Value> {
let data = std::fs::read(&path)?;
let value = toml::from_slice(data.as_slice())?;
toml::from_slice(data.as_slice()).context("Failed to deserialize theme")
Ok(value)
}
// Returns the path to the theme with the name