this.path-package: Get Script's Path
In this.path: Get Executing Script's Path

this.path-package

R Documentation

Get Script's Path

Description

Determine the path of the executing script.

Compatible with several popular GUIs:

‘Rgui’
‘\RStudio’ (including background jobs)
‘\Positron’
‘\VSCode’ + ‘\REditorSupport’
‘\Jupyter’
‘\Emacs’ + ‘\ESS’
‘\Rscriptlink’ (shell)

Compatible with several functions and packages: \syspathcompatiblelinks

Details

The most important functions from package:this.path are this.path(), this.dir(), here(), and this.proj():

this.path() returns the normalized path of the script in which it is written.
this.dir() returns the directory of this.path().
here() constructs file paths against this.dir().
this.proj() constructs file paths against the project root of this.dir().

New additions include:

LINENO() returns the line number of the executing expression.
shFILE() looks through the command line arguments, extracting FILE from either of the following: -f FILE or --file=FILE
set.sys.path() implements this.path() for any \sourcelink-like functions outside of the builtins.
with_init.file() allows this.path() and related to be used in a user profile.

package:this.path also provides functions for constructing and manipulating file paths:

path.join(), basename2(), and dirname2() are drop in replacements for \codelink3basefile.path(), \codelink3basebasename(), and \codelink3base:basenamedirname() which better handle drives and network shares.
splitext(), removeext(), ext(), and ext<-() split a path into root and extension, remove a file extension, get an extension, or set an extension for a file path.
path.split(), path.split.1(), and path.unsplit() split the path to a file into components.
relpath(), rel2here(), and rel2proj() turn absolute paths into relative paths.

Note

This package started from a stack overflow posting:

\Sexpr[results=rd,stage=install]{if (getRversion() >= "3.0.0") "\\\href{https://stackoverflow.com/questions/1815606/determine-path-of-the-executing-script/64129649#64129649}{https://stackoverflow.com/questions/1815606/determine-path-of-the-executing-script/64129649#64129649}" else "\\\ifelse{latex}{\\\href{https://stackoverflow.com/questions/1815606/determine-path-of-the-executing-script/64129649}{https://stackoverflow.com/questions/1815606/determine-path-of-the-executing-script/64129649}}{\\\href{https://stackoverflow.com/questions/1815606/determine-path-of-the-executing-script/64129649#64129649}{https://stackoverflow.com/questions/1815606/determine-path-of-the-executing-script/64129649#64129649}}"}

If you like this package, please consider upvoting my answer so that more people will see it! If you have an issue with this package, please use \codelink3utils:bug.reportbug.report(package = "this.path") to report your issue.