| Title: | Load Environment Variables from '.env' |
|---|---|
| Description: | Load configuration from a '.env' file, that is in the current working directory, into environment variables. |
| Authors: | Gábor Csárdi [aut, cre, cph] |
| Maintainer: | Gábor Csárdi <[email protected]> |
| License: | MIT + file LICENSE |
| Version: | 1.0.3.9000 |
| Built: | 2024-10-31 22:10:58 UTC |
| Source: | https://github.com/gaborcsardi/dotenv |
It has become a practice to store configuration parameters related
to a project, in a hidden file called .env, in the working
directory of a project, and then set them as environment variables.
This package loads the variables defined in the .env file
in the current working directory (as reported by getwd),
and sets them as environment variables.
This happens automatically when the dotenv package is loaded,
so the typical use-case is to just put a 'library(dotenv)' code at the
beginning of your R script.
Alternatively a dotenv::load_dot_env() call can be used
to load variables from arbitrary files.
The format of the .env file is also a valid unix shell
file format, so e.g. in bash the environment variables
can also be set by running source .env.
See load_dot_env for the exact file format.
load_dot_env
Load variables defined in the given file, as environment variables.
load_dot_env(file = ".env")load_dot_env(file = ".env")
file |
The name of the file to use. |
The file is parsed line by line, and line is expected to have one of the following formats:
VARIABLE=value VARIABLE2="quoted value" VARIABLE3='another quoted variable' # Comment line export EXPORTED="exported variable" export EXPORTED2=another
In more details:
A leading export is ignored, to keep the file
compatible with Unix shells.
No whitespace is allowed right before or after the equal sign, again, to promote compatilibity with Unix shells.
No multi-line variables are supported currently. The file is strictly parsed line by line.
Unlike for Unix shells, unquoted values are not terminated by whitespace.
Comments start with #, without any leading
whitespace. You cannot mix variable definitions and
comments in the same line.
Empty lines (containing whitespace only) are ignored.
It is suggested to keep the file in a form that is parsed the
same way with dotenv and bash (or other shells).
# Remove, if it exists Sys.unsetenv("dotenvexamplefoo") Sys.getenv("dotenvexamplefoo") # Load from a file tmp <- tempfile() cat("dotenvexamplefoo=bar\n", file = tmp) load_dot_env(tmp) Sys.getenv("dotenvexamplefoo") # Clean up unlink(tmp)# Remove, if it exists Sys.unsetenv("dotenvexamplefoo") Sys.getenv("dotenvexamplefoo") # Load from a file tmp <- tempfile() cat("dotenvexamplefoo=bar\n", file = tmp) load_dot_env(tmp) Sys.getenv("dotenvexamplefoo") # Clean up unlink(tmp)