available_linters {lintr}

Get Linter metadata from a package

Description

available_linters() obtains a tagged list of all Linters available in a package.

available_tags() searches for available tags.

Usage

available_linters(packages = "lintr", tags = NULL, exclude_tags = "deprecated")

available_tags(packages = "lintr")

Arguments

packages

A character vector of packages to search for linters.

tags

Optional character vector of tags to search. Only linters with at least one matching tag will be returned. If tags is NULL, all linters will be returned. See available_tags("lintr") to find out what tags are already used by lintr.

exclude_tags

Tags to exclude from the results. Linters with at least one matching tag will not be returned. If except_tags is NULL, no linters will be excluded. Note that tags takes priority, meaning that any tag found in both tags and exclude_tags will be included, not excluded.

Value

available_linters returns a data frame with columns 'linter', 'package' and 'tags':

linter

A character column naming the function associated with the linter.

package

A character column containing the name of the package providing the linter.

tags

A list column containing tags associated with the linter.

available_tags returns a character vector of linter tags used by the packages.

Package Authors

To implement available_linters() for your package, include a file inst/lintr/linters.csv in your package. The CSV file must contain the columns 'linter' and 'tags', and be UTF-8 encoded. Additional columns will be silently ignored if present and the columns are identified by name. Each row describes a linter by

1. its function name (e.g. "assignment_linter") in the column 'linter'.

2. space-separated tags associated with the linter (e.g. "style consistency default") in the column 'tags'.

Tags should be snake_case.

See available_tags("lintr") to find out what tags are already used by lintr.

See Also

• linters for a complete list of linters available in lintr.

• available_tags() to retrieve the set of valid tags.

Examples

lintr_linters <- available_linters()

# If the package doesn't exist or isn't installed, an empty data frame will be returned
available_linters("does-not-exist")

lintr_linters2 <- available_linters(c("lintr", "does-not-exist"))
identical(lintr_linters, lintr_linters2)
available_tags()