Args                    Providing Arguments to a Script
LINENO                  Line Number of Executing Script
OS.type                 Detect the Operating System Type
R.from.shell            Using R From a Shell
Sys.putenv              Set Environment Variables
basename2               Manipulate File Paths
check.path              Check 'this.path()' is Functioning Correctly
ext                     File Extensions
from.shell              Top-Level Code Environment
getinitwd               Get Initial Working Directory
here                    Construct Path to File, Starting with
                        'this.dir()'
path.join               Construct Path to File
path.split              Split File Path Into Individual Components
relpath                 Make a Path Relative to Another Path
set.this.path.jupyter   Declare Executing 'Jupyter' Notebook's Filename
shFILE                  Get 'FILE' Provided to R by a Shell
this.path               Determine Executing Script's Filename
this.path-package       Get Executing Script's Path
this.proj               Construct Path to File, Starting with the
                        Project's Directory
try.this.path           Attempt to Determine Executing Script's
                        Filename
tryCatch2               Condition Handling and Recovery
wrap.source             Implement 'this.path()' For Arbitrary
                        'source()'-Like Functions
