dep_auto: Build automatic dependencies among chunks

In yihui/knitr: A General-Purpose Package for Dynamic Report Generation in R

Build automatic dependencies among chunks

Description

When the chunk option autodep = TRUE, all names of objects created in a chunk will be saved in a file named ‘__objects’ and all global objects used in a chunk will be saved to ‘__globals’. This function can analyze object names in these files to automatically build cache dependencies, which is similar to the effect of the dependson option. It is supposed to be used in the first chunk of a document and this chunk must not be cached.

Usage

dep_auto(path = opts_chunk$get("cache.path"), labels = all_labels())

Arguments

path	Path to the dependency file.
labels	A vector of labels of chunks for which the dependencies will be built. By default, dependencies for all chunks will be built.

Value

NULL. The dependencies are built as a side effect.

Note

Be cautious about path: because this function is used in a chunk, the working directory when the chunk is evaluated is the directory of the input document in knit, and if that directory differs from the working directory before calling knit(), you need to adjust the path argument here to make sure this function can find the cache files ‘__objects’ and ‘__globals’.

References

https://yihui.org/knitr/demo/cache/

See Also

dep_prev

yihui/knitr documentation built on Nov. 14, 2024, 3:14 p.m.