bail! in render() if specified theme directory does not exist
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@ -481,7 +481,13 @@ impl Renderer for HtmlHandlebars {
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let mut handlebars = Handlebars::new();
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let theme_dir = match html_config.theme {
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Some(ref theme) => ctx.root.join(theme),
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Some(ref theme) => {
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let dir = ctx.root.join(theme);
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if !dir.is_dir() {
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bail!("theme dir {} does not exist", dir.display());
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}
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dir
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}
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None => ctx.root.join("theme"),
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};
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