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Merge pull request #1284 from ericonr/opt 

Mention that uninstalled backend isn't marked optional.
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Eric Huss 2020-07-30 20:22:55 -07:00 committed by GitHub
parent f5ae7c4f13 78aa2a16f8
commit 8746206060
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2 changed files with 6 additions and 2 deletions
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4
book-example/src/for_developers/backends.md
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@ -334,7 +334,9 @@ the usual `RUST_LOG` to control logging verbosity.
If you enable a backend that isn't installed, the default behavior is to throw an error: If you enable a backend that isn't installed, the default behavior is to throw an error:
```text ```text
The command wasn't found, is the "wordcount" backend installed? The command `mdbook-wordcount` wasn't found, is the "wordcount" backend installed?
If you want to ignore this error when the "wordcount" backend is not installed,
set `optional = true` in the `[output.wordcount]` section of the book.toml configuration file.
``` ```
This behavior can be changed by marking the backend as optional. This behavior can be changed by marking the backend as optional.

4
src/renderer/mod.rs
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@ -173,7 +173,9 @@ impl CmdRenderer {
return Ok(()); return Ok(());
} else { } else {
error!( error!(
"The command `{}` wasn't found, is the `{}` backend installed?", "The command `{0}` wasn't found, is the \"{1}\" backend installed? \
If you want to ignore this error when the \"{1}\" backend is not installed, \
set `optional = true` in the `[output.{1}]` section of the book.toml configuration file.",
self.cmd, self.name self.cmd, self.name
); );
} }