Get the path of current script

In RStudio, you can get the path to the file currently shown in the source pane using

rstudioapi::getSourceEditorContext()$path

If you only want the directory, use

dirname(rstudioapi::getSourceEditorContext()$path)

If you want the name of the file that's been run by source(filename), that's a little harder. You need to look for the variable srcfile somewhere back in the stack. How far back depends on how you write things, but it's around 4 steps back: for example,

fi <- tempfile()
writeLines("f()", fi)
f <- function() print(sys.frame(-4)$srcfile)
source(fi)
fi

should print the same thing on the last two lines.

Update March 2019

Based on Alexis Lucattini and user2554330 answers, to make it work on both command line and RStudio. Also solving the "as_tibble" deprecated message

library(tidyverse)
getCurrentFileLocation <-  function()
{
    this_file <- commandArgs() %>% 
    tibble::enframe(name = NULL) %>%
    tidyr::separate(col=value, into=c("key", "value"), sep="=", fill='right') %>%
    dplyr::filter(key == "--file") %>%
    dplyr::pull(value)
    if (length(this_file)==0)
    {
      this_file <- rstudioapi::getSourceEditorContext()$path
    }
    return(dirname(this_file))
}