Merge pull request #1526 from apatniv/add_log_messages
Add useful messages when command line preprocessor fails
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commit
7e7e779ef7
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@ -109,18 +109,28 @@ impl Preprocessor for CmdPreprocessor {
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self.write_input_to_child(&mut child, &book, ctx);
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let output = child
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.wait_with_output()
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.with_context(|| "Error waiting for the preprocessor to complete")?;
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let output = child.wait_with_output().with_context(|| {
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format!(
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"Error waiting for the \"{}\" preprocessor to complete",
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self.name
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)
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})?;
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trace!("{} exited with output: {:?}", self.cmd, output);
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ensure!(
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output.status.success(),
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"The preprocessor exited unsuccessfully"
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format!(
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"The \"{}\" preprocessor exited unsuccessfully with {} status",
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self.name, output.status
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)
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);
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serde_json::from_slice(&output.stdout)
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.with_context(|| "Unable to parse the preprocessed book")
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serde_json::from_slice(&output.stdout).with_context(|| {
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format!(
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"Unable to parse the preprocessed book from \"{}\" processor",
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self.name
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)
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})
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}
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fn supports_renderer(&self, renderer: &str) -> bool {
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