$ ev -h
Usage:
    ev [-q] PATH ...
    ev [-q] -u PATH ...

Options:
    -q            No output
    -u PATH       Unset environment variables in PATH
    -h --help     Show this message

EVPATH=/home/joe/.config/env
EVPATH is the directory or list of directories where ev will search.
PATH can be a name of a file/directory in EVPATH or a path to a file/directory.

$ env | grep FOO
$ env | grep BAR
$ tree ~/.config/env/foo/
/home/joe/.config/env/foo/
├── FOO
└── BAR

0 directories, 2 files
$ ev foo
FOO
BAR
$ env | grep FOO
FOO=foo123
$ env | grep BAR
BAR=bar
$ ev -u foo
FOO
BAR
$ env | grep FOO
$ env | grep BAR

$ echo >IP "\
   #!/bin/sh
   curl -s ifconfig.co"
$ chmod +x IP
$ ./IP
8.8.8.8
$ env | grep IP
$ ev IP
IP
$ env | grep IP
IP=8.8.8.8

$ env | grep FOO
$ env | grep BAR
$ env | grep BAZ
$ tree envvars/
envvars/
└── foo
    ├── FOO
    └── bar
        ├── BAR
        └── baz
            └── BAZ

3 directories, 3 files
$ ev envvars
FOO
BAR
BAZ
$ env | grep FOO
FOO=foo
$ env | grep BAR
BAR=bar
$ env | grep BAZ
BAZ=baz
$ ev -u envvars
FOO
BAR
BAZ
$ env | grep FOO
$ env | grep BAR
$ env | grep BAZ

fisher install joehillen/ev-fish

fundle plugin 'joehillen/ev-fish'

cp functions/ev.fish ~/.config/fish/functions/
cp completions/ev.fish ~/.config/fish/completions/