The goal of attachment is to help to deal with package dependencies during package development. It also gives useful tools to install or list missing packages used inside Rscripts or Rmds.

When building a package, we have to add @importFrom in our documentation or pkg::fun in the R code. The most important is not to forget to add the list of dependencies in the “Imports” or “Suggests” package lists in the DESCRIPTION file.

Why do you have to repeat twice the same thing ?
And what happens when you remove a dependency for one of your functions ? Do you really want to run a “Find in files” to verify that you do not need this package anymore ?

See full documentation realized using {pkgdown} at https://thinkr-open.github.io/attachment/

## Installation

CRAN version

install.packages("attachment")

Development version

# install.packages("devtools")
devtools::install_github("ThinkR-open/attachment")

## Use package {attachment}

### During package development

library(attachment)

What you really want is to fill and update your description file along with the modifications of your documentation. Indeed, only the following function will really be called. Use and abuse during the development of your package !

attachment::att_amend_desc()

As {pkgdown} and {covr} are not listed in any script in your package, a common call for your development packages would be:

attachment::att_amend_desc(extra.suggests = c("pkgdown", "covr"))

Note: attachment::att_to_description() is Deprecated.

#### Example on a fake package

# Copy package in a temporary directory
tmpdir <- tempdir()
file.copy(system.file("dummypackage",package = "attachment"), tmpdir, recursive = TRUE)
#> [1] TRUE
dummypackage <- file.path(tmpdir, "dummypackage")
# browseURL(dummypackage)
att_amend_desc(path = dummypackage, inside_rmd = TRUE)
#> Updating dummypackage documentation
#> Updating roxygen version in /tmp/Rtmpl1G8Z3/dummypackage/DESCRIPTION
#> Writing NAMESPACE
#> Writing NAMESPACE
#> Package(s) Rcpp is(are) in category 'LinkingTo'. Check your Description file to be sure it is really what you want.
#> [-] 1 package(s) removed: utils.
#> [+] 2 package(s) added: stats, ggplot2.

### For installation

To quickly install missing packages from a DESCRIPTION file, use:

attachment::install_from_description()
#> All required packages are installed

To quickly install missing packages needed to compile Rmd files or run Rscripts, use:

attachment::att_from_rmds(path = ".") %>% attachment::install_if_missing()

attachment::att_from_rscripts(path = ".") %>% attachment::install_if_missing()

Function attachment::create_dependencies_file() will create a dependencies.R file in inst/ directory. This R script contains the procedure to quickly install missing dependencies:

# No Remotes ----
# remotes::install_github("ThinkR-open/fcuk")
# Attachments ----
to_install <- c("covr", "desc", "devtools", "glue", "knitr", "magrittr", "rmarkdown", "stats", "stringr", "testthat", "utils")
for (i in to_install) {
message(paste("looking for ", i))
if (!requireNamespace(i)) {
message(paste("     installing", i))
install.packages(i)
}
}

### For bookdown

If you write a {bookdown} and want to publish it on Github using Travis for instance, you will need a DESCRIPTION file with list of dependencies just like for a package. In this case, you can use the function to description from import/suggest: att_to_desc_from_is().

# bookdown Imports are in Rmds
imports <- c("bookdown", attachment::att_from_rmds("."))
attachment::att_to_desc_from_is(path.d = "DESCRIPTION",
imports = imports, suggests = NULL)

### To list information

Of course, you can also use {attachment} out of a package to list all package dependencies of R scripts using att_from_rscripts() or Rmd files using att_from_rmds().
If you are running this inside a Rmd, you may need parameter inside_rmd = TRUE.

dummypackage <- system.file("dummypackage", package = "attachment")

att_from_rscripts(path = dummypackage)
#> [1] "stats"        "base"         "testthat"     "dummypackage"
att_from_rmds(path = file.path(dummypackage, "vignettes"), inside_rmd = TRUE)
#> [1] "knitr"     "rmarkdown" "ggplot2"

## Vignette

Package {attachment} has a vignette to present the different functions available. There is also a recommendation to have a devstuff_history.R in the root directory of your package. (Have a look at devstuff_history.R in the present package)

vignette("fill-pkg-description", package = "attachment")

The vignette is available on the {pkgdown} page: https://thinkr-open.github.io/attachment/articles/fill-pkg-description.html

See full documentation realized using {pkgdown} at https://thinkr-open.github.io/attachment/

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.