Is there a way to pass environment variables to the quasar from console? - quasar

Question

I develop a quasar application and I use 'dotenv' plug-in to parse .env file.
Sometimes I need to make provisional changes in variables such as use a different address of back-end for only current run and I don't want to change .env file.
If there is a way to pass environment variable in console?
e.g.
quasar dev BACKEND='http://localhost'

Answer 1

My solution:
In quasar.conf.js:
const envparser = require('./src/envparser')
...
build: {
env: envparser(),
...
./src/envparser:
const DotEnv = require('dotenv')
const parsedEnv = DotEnv.config().parsed
const argEnv = {}
process.argv.forEach((v, k) => {
if (v.indexOf('--env.') === 0) {
argEnv[v.substring(6)] = process.argv[k + 1]
}
})
module.exports = function () {
for (let key in parsedEnv) {
if (typeof parsedEnv[key] === 'string') {
parsedEnv[key] = JSON.stringify(parsedEnv[key])
}
}
for (let key in argEnv) {
parsedEnv[key] = JSON.stringify(argEnv[key])
}
return parsedEnv
}
So now you can use .env file for define environment variables, .env.prod and .env.dev for production and development mode and those will be overwritten by console arguments:
quasar dev --env.VARIABLE "Value"

Answer 2

My solution:
In my Dockerfile, i export my environment variables
ENV PROTOCOL='https://'
ENV HOST='example.com.br'
ENV PORT=443
then, I get the variables in process.env in my file config/index.js
something like this:
module.exports = {
NODE_ENV: '"production"',
PROTOCOL: JSON.stringify(process.env.THRUST_PROTOCOL),
HOST: JSON.stringify(process.env.THRUST_HOST),
PORT: JSON.stringify(process.env.THRUST_PORT)
}
I hope to help