CODEWITHSUNDEEP
r
polkas
polkas

Reputation: 4184

Read a package NAMESPACE file

I am looking for a fast R solution to read a package NAMESPACE file. The solution should contain already preprocessed (and aggregated) records and separated imports and exports.

Unfortunately I can’t use getNamespaceExports("dplyr")/getNamespaceImports("dplyr") as they need the package to be loaded to the R session, which is too slow.

I need a solution which simply process a text from the NAMESPACE file. Any solutions using external packages as well as partial solutions would still be welcome.

The raw data we could grabbed with a call like readLines("https://raw.githubusercontent.com/cran/dplyr/master/NAMESPACE"). roxygen2 generated files are formatted properly, but this will be not true for all manually generated files.

EDIT:

Thanks to Konrad R. answer I could develop such functionality in my new CRAN package - pacs. I recommended to check pacs::pac_namespace function. There is even one function which goes one step further, comparing NAMESPACE files between different package versions pacs::pac_comapre_namespace.

Upvotes: 2

Views: 532

Answers (1)

Konrad Rudolph
Konrad Rudolph

Reputation: 545598

The function is included in R as base::parseNamespaceFile. Unfortunately the function does not directly take a path as an argument. Instead it constructs the path from a package name and the library location. However, armed with this knowledge you should be able to call it; e.g.:

parseNamespaceFile('dplyr', .libPaths()[1L])

Upvotes: 4

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