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Automatically replace lints

Source: R/fix.R
fix.Rd

fix(), fix_package(), and fix_dir() all replace lints in files. The only difference is in the input they take:

  • fix() takes path to files or directories

  • fix_dir() takes a path to one directory

  • fix_package() takes a path to the root of a package and looks at the following list of folders: R, tests, inst, vignettes, data-raw, demo, exec.

fix_text() takes some text input. Its main interest is to be able to quickly experiment with some lints and fixes.

Usage

fix(
  path = ".",
  linters = NULL,
  exclude_path = NULL,
  exclude_linters = NULL,
  force = FALSE,
  verbose = TRUE
)

fix_dir(
  path = ".",
  linters = NULL,
  exclude_path = NULL,
  exclude_linters = NULL,
  force = FALSE,
  verbose = TRUE
)

fix_package(
  path = ".",
  linters = NULL,
  exclude_path = NULL,
  exclude_linters = NULL,
  force = FALSE,
  verbose = TRUE
)

fix_text(text, linters = NULL, exclude_linters = NULL)

Arguments

path

A valid path to a file or a directory. Relative paths are accepted.

linters

A character vector with the names of the rules to apply. See the entire list of rules with list_linters().

exclude_path

One or several paths that will be ignored from the path selection.

exclude_linters

One or several linters that will not be checked. Values can be the names of linters (such as "any_is_na") or its associated function, such as any_is_na_linter() (this is mostly for compatibility with lintr).

force

Force the application of fixes on the files. This is used only in the case where Git is not detected, several files will be modified, and the code is run in a non-interactive setting.

verbose

Show messages.

text

Text to analyze (and to fix if necessary).

Ignoring lines

flint supports ignoring single lines of code with # flint-ignore. For example, this will not warn:

# flint-ignore
any(duplicated(x))

However, this will warn for the second any(duplicated()):

# flint-ignore
any(duplicated(x))
any(duplicated(y))

To ignore more than one line of code, use # flint-ignore-start and # flint-ignore-end:

# flint-ignore-start
any(duplicated(x))
any(duplicated(y))
# flint-ignore-end

Examples

# `fix_text()` is convenient to explore with a small example
fix_text("any(duplicated(rnorm(5)))")
#> Old code: any(duplicated(rnorm(5))) 
#> New code: anyDuplicated(rnorm(5)) > 0 

fix_text("any(duplicated(rnorm(5)))
any(is.na(x))
")
#> Old code:
#> any(duplicated(rnorm(5)))
#> any(is.na(x))
#> 
#> New code:
#> anyDuplicated(rnorm(5)) > 0
#> anyNA(x)

# Setup for the example with `fix()`
destfile <- tempfile()
cat("
x = c(1, 2, 3)
any(duplicated(x), na.rm = TRUE)

any(duplicated(x))

if (any(is.na(x))) {
  TRUE
}

any(
  duplicated(x)
)", file = destfile)

fix(destfile)
#> ℹ Going to check 1 file.
#> ✔ Fixed 3 lints in 1 file.
cat(paste(readLines(destfile), collapse = "\n"))
#> 
#> x <- c(1, 2, 3)
#> anyDuplicated(x) > 0
#> 
#> anyDuplicated(x) > 0
#> 
#> if (anyNA(x)) {
#>   TRUE
#> }
#> 
#> anyDuplicated(x) > 0