Give advice about good practices when building R packages. Advice includes functions and syntax to avoid, package structure, code complexity, code formatting, etc.
You can install the release version from CRAN
install.packages("goodpractice")and the development version from GitHub
remotes::install_github("mangothecat/goodpractice")library(goodpractice)
gp("<my-package>")library(goodpractice)
# use example package contained in the goodpractice package
pkg_path <- system.file("bad1", package = "goodpractice")
g <- gp(pkg_path)#>
#> * checking for file ‘/tmp/Rtmpel0L5F/remotesd7c53a259c/badpackage/DESCRIPTION’ ... OK
#> * preparing ‘badpackage’:
#> * checking DESCRIPTION meta-information ... OK
#> * checking vignette meta-information ... OK
#> * checking for LF line-endings in source and make files and shell scripts
#> * checking for empty or unneeded directories
#> * building ‘badpackage_1.0.0.tar.gz’
g#> ── GP badpackage ───────────────────────────────────────────────────────────────
#>
#> It is good practice to
#>
#> ✖ not use "Depends" in DESCRIPTION, as it can cause name clashes, and
#> poor interaction with other packages. Use "Imports" instead.
#> ✖ omit "Date" in DESCRIPTION. It is not required and it gets invalid
#> quite often. A build date will be added to the package when you
#> perform `R CMD build` on it.
#> ✖ add a "URL" field to DESCRIPTION. It helps users find information
#> about your package online. If your package does not have a
#> homepage, add an URL to GitHub, or the CRAN package package page.
#> ✖ add a "BugReports" field to DESCRIPTION, and point it to a bug
#> tracker. Many online code hosting services provide bug trackers for
#> free, https://github.com, https://gitlab.com, etc.
#> ✖ omit trailing semicolons from code lines. They are not needed and
#> most R coding standards forbid them
#>
#> R/semicolons.R:4:30
#> R/semicolons.R:5:29
#> R/semicolons.R:9:38
#>
#> ✖ not import packages as a whole, as this can cause name clashes
#> between the imported packages. Instead, import only the specific
#> functions you need.
#> ✖ fix this R CMD check ERROR: VignetteBuilder package not declared:
#> ‘knitr’ See section ‘The DESCRIPTION file’ in the ‘Writing R
#> Extensions’ manual.
#> ✖ avoid 'T' and 'F', as they are just variables which are set to the
#> logicals 'TRUE' and 'FALSE' by default, but are not reserved words
#> and hence can be overwritten by the user. Hence, one should always
#> use 'TRUE' and 'FALSE' for the logicals.
#>
#> R/tf.R:NA:NA
#> R/tf.R:NA:NA
#> R/tf.R:NA:NA
#> R/tf.R:NA:NA
#> R/tf.R:NA:NA
#> ... and 4 more lines
#>
#> ────────────────────────────────────────────────────────────────────────────────
# show all available checks
# all_checks()
# run only a specific check
g_url <- gp(pkg_path, checks = "description_url")
g_url#> ── GP badpackage ───────────────────────────────────────────────────────────────
#>
#> It is good practice to
#>
#> ✖ add a "URL" field to DESCRIPTION. It helps users find information
#> about your package online. If your package does not have a
#> homepage, add an URL to GitHub, or the CRAN package package page.
#> ────────────────────────────────────────────────────────────────────────────────
# which checks were carried out?
checks(g_url)#> [1] "description_url"
# which checks failed?
failed_checks(g)#> [1] "no_description_depends"
#> [2] "no_description_date"
#> [3] "description_url"
#> [4] "description_bugreports"
#> [5] "lintr_trailing_semicolon_linter"
#> [6] "no_import_package_as_a_whole"
#> [7] "rcmdcheck_package_dependencies_present"
#> [8] "truefalse_not_tf"
# show the first 5 checks carried out and their results
results(g)[1:5,]#> check result
#> 1 covr NA
#> 2 cyclocomp TRUE
#> 3 no_description_depends FALSE
#> 4 no_description_date FALSE
#> 5 description_url FALSE
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