envirun

Load environment from file and run any program with this loaded environment.

This is useful if you want to easily run program with different environment, or troubleshoot systemd services which reads environment from /etc/default/ files.

Installation

pip3 install envirun

Example Usage

/tmp/x.sh:

#!/bin/sh

echo X: $X
echo $*

/tmp/x1.env: X=1 /tmp/x2.env: X=2

$ envirun.py /tmp/x1.env /tmp/x.sh some args
X: 1
some args

$ envirun.py /tmp/x2.env /tmp/x.sh some other args --foo --bar
X: 2
some other args --foo --bar

Source code

See environ.py, it's very simple. Main code is just three lines:

load_dotenv(dotenv_path=sys.argv[1], override=True)
rc = subprocess.run(sys.argv[2:])
sys.exit(rc.returncode)

More details

Environment files are loaded using dotenv load_dotenv(), overriding existing env variables. Environment lines may start with export. See dotenv documentation if you want more details.

See also similar project: envrun

How to achieve same result without envirun in bash (with few more commands):

$ set -a
$ . /tmp/x1.env  # Load environment from /tmp/x1.env file
$ set +a
$ /tmp/x.sh some args
X: 1
some args