I'd like to export all variables used by a certain systemd service, and are specified in its unit file using EnvironmentFile.
E.g. foo.service :
[Service]
...
EnvronmentFile=/foo.env
EnvronmentFile=/bar.env
foo.env:
a=1
#b=2
c=3
So I've thought adding to my bashrc something like
set -a
grep EnvironmentFile /etc/systemd/system/foo.service | grep -v '^ *#' | cut -d'=' -f2 | xargs -I {} bash -c 'source {};'
set +a
as specified in this answer.
Is there a more elegant solution?
This won't work at all because you're executing a new bash shell to do the 'source'
Try:
load_env()
{
local files=( $(egrep '^[ ]*EnvironmentFile' "$1" ) )
local f
set -a
for f in "${files[@]}"
do
. "${f##*=}" # this expression delete the EnvironmentFile= part
done
set +a
}
load_env /etc/systemd/system/foo.service
source (.) feature of the shell to read and interpret the Systemd EnvironmentFiles (as did the question). But that file has different syntax than POSIX shell (particularly it doesn't require quoting around spaces), and often isn't compatible.