d7892f5601
This adds the `optional` field to the preprocessor configuration to mirror the same option for the `output` table. Missing preprocessors are now an error unless the `optional` field is set. This should help with inadvertently building a book when a missing preprocessor that you expect to be installed.
3 lines
72 B
TOML
3 lines
72 B
TOML
[preprocessor.missing]
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command = "trduyvbhijnorgevfuhn"
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optional = true
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