load_dot_env: Load environment variables from the specified file

In dotenv: Load Environment Variables from '.env'

Description

Load variables defined in the given file, as environment variables.

Usage

load_dot_env(file = ".env")

Arguments

file	The name of the file to use.

Details

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).

Examples

# 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)

Example output

[1] ""
[1] "bar"

dotenv documentation built on April 22, 2021, 5:08 p.m.