enwire

Tool for "re-wiring" environment variables.

• Supports .json format
• Supports .env format

Installation

npm install --global enwire

or use enwire without installation:

npx enwire
npx enwire --no-process -r HOME
cat package.json | npx enwire --pick name --no-process
cat .env | npx enwire --pick foo --no-process

dotenv-like Usage

Create a .env file with your env vars.

FOO=bar

Run your app with your env vars.

cat .env | enwire node app.js

Usage

Print all env vars.

enwire

Print selected env vars.

enwire --no-process --rewire HOME
# {"HOME": "..."}

Export in env var format.

enwire --no-process --rewire HOME --format env
# HOME="..."

Rewire env vars.

enwire --no-process --rewire HOME:TROLOLO
# {"TROLOLO": "..."}

Pass string as an env var.

echo Hello | enwire --raw --no-process
# {"ENWIRE": "Hello"}

Set custom name for string variable.

echo Hello | enwire --raw --no-process --name HELLO
# {"HELLO": "Hello"}

Populate env vars from JSON.

echo '{"db": "Test"}' | enwire --no-process
# {"db": "Test"}

Rewire JSON env vars.

echo '{"db": "Test"}' | enwire --no-process --rewire db:PGDATABASE --delete db
# {"PGDATABASE": "Test"}

Print project name.

cat package.json | enwire --no-process --pick name
# {"name": "enwire"}

Rewire nested keys from JSON.

cat package.json | enwire --no-process --no-merge --rewire scripts.test:TEST_CMD
# {"TEST_CMD": "./test.sh"}

Pass project name to printenv NAME script.

cat package.json | enwire --rewire name:NAME -- printenv NAME
# enwire

Pass env vars to yarn deploy script.

enwire --rewire AWS_PROFILE_PROD:AWS_PROFILE -- yarn deploy

Rewire environment variables.

db=Test enwire --rewire db:PGDATABASE -- printenv PGDATABASE
# Test

Evaluate arguments as JavaScript template strings.

HELLO=Hello enwire --eval -- echo "\${HELLO}, \${USER + '\!'}"
# Hello, user!

Prompt user to enter env var in console.

enwire --prompt TEST -- printenv TEST

Options

npx enwire --help

• --delete, -d — environment variable to delete.
• --eval, -e — evaluate CLI argumens as JS template strings.
• --import, -i — import and merge extra .json and .env files into process env
• --prompt, -p — prompt user to input variable in console if not set.
• --rewire, -r — from-to mapping of environment variable, e.g. --rewire db:PGDATABASE.
• --delete-rewired — if specified, rewired environment variables will be deleted.
• --format — by default exports in JSON format, --format=env can be set to export in env var format.
• --no-process — if specified, process environment variables will not be included.
• --no-merge — don't merge JSON from STDIN into process.env.
• --pick — specifies which keys to pick from JSON object provided through STDIN.
• --help, -h — show usage info.
• --version, -v — show enwire version.