*package.json**
{
"name": "test-project",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"build": "node build build_name"
},
"author": "",
"license": "ISC",
"devDependencies": {
}
}
build.js
console.log("Building Code. Output File Name:", process.env.build_name);
Command Line
$ npm run build build_name="web"
I want to pass a parameter build_name from the command line while executing build script. I will use that param inside my build script. Can someone tell me how to achieve this? Also if I did not pass build_name from the command line, can we send a default value from here "build": "node build build_name" instead of build_name.
Use the "yargs" module.
Step 1:
npm install yargs
Step 2:
vi test.js
press i and copy the below code and paste it.
'use strict';
const args = require('yargs').argv;
console.log('Name: ' + args.name);
console.log('Age: ' + args.age);
Step 3 : Execution
node test.js --name=jacob --age=45
Step 4: output
Name: jacob
Age: 45
Let me know if it helps.
Related
I am trying to create a Dapp using truffle but when I reach the stage of using the command npm run dev it gives me an error saying MISSING SCRIP. my code is as follows:
{
"name": "eth-vreg",
"version": "1.0.0",
"description": "Blockchain vreg Powered By Ethereum",
"main": "truffle-config.js",
"directories": {
"test": "test"
},
"scripts": {
"dev": "lite-server",
"test": "echo \"Error: no test specified\" && sexit 1"
},
You need to specify the command to run when executing npm run. in this case node
"scripts": {
"dev": "node lite-server",
"test": "echo \"Error: no test specified\" && sexit 1"
}
You can read more about the scripts property here.
Today, I'm coding a few npm packages and a few things that need to be prepared repeatedly.
So I wanted to code a CLI to get those things done quickly.
Here is the src/cli.js code:
export function cli(args){
console.log(args);
}
Here is the package.json code:
{
"name": "my-project",
"version": "1.0.0",
"description": "A CLI to bootstrap new project",
"main": "src/index.js",
"bin": {
"#kensoni/my-project": "bin/my-project",
"my-project": "bin/my-project"
},
"publishConfig": {
"access": "public"
},
"keywords": [
"cli"
],
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "Ken Nguyen",
"license": "MIT",
"dependencies": {
"arg": "^5.0.0",
"esm": "^3.2.25",
"inquirer": "^8.1.1"
}
}
Here is the bin/my-project code:
#!/usr/bin/env/ node
require = require('esm')(module /*, options*/);
require('../src/cli').cli(process.argv);
After I execute the command npm link and open a new cmd type my-project, I get the following message:
'"/"' is not recognized as an internal or external command,
operable program or batch file.
I am using these versions:
node: 14.17.1
npm: 7.18.1
Any ideas how it might work.
Thanks in advance.
Remove "/" after env
#!/usr/bin/env node
//...
I am trying to do basic CLI with node, but seems like it is not linking from/to correct directory.
I have file named create, which contains command: console.log(process.cwd());
When I run in bash node create, it gives me that outcome:
/Users/katya/Desktop/code/drawer.
However, after running npm link (or sudo npm link), it prints that:
/Users/katya/.npm-packages/bin/dosmth -> /Users/katya/.npm-packages/lib/node_modules/drawer/create
/Users/katya/.npm-packages/lib/node_modules/drawer -> /Users/katya/Desktop/code/drawer
and after that if I run dosmth in bash I get:
bash: dosmth: command not found
I assume there is something to do with ./npm-packages/ appearing in the path.
I tried to delete node completely from computer and install again but did not help.
If you have any idea I would really appreciate your help.
My package.json:
{
"name": "drawer",
"version": "1.0.0",
"description": "",
"main": "index.js",
"bin": {
"dosmth": "create"
},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC"
}
Have you tried changing bin to point to your index.js?
{
// Other keys ...
"bin": {
"dosmth": "./index.js"
},
//...
}
I have a package.json file that looks like this:
{
"name": "myapp",
"version": "0.0.1",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "webpack-dev-server --port=4200",
"build": "webpack",
"docker-build": "docker build -t myapp .",
"docker-run": "docker run -d --name myapp -p 9090:9090 myapp",
"docker-push": "docker build -t myapp . & docker tag myapp myrepo/myapp:{$VERSION} & docker push myrepo/myapp:{$VERSION}"
},
...
}
Im trying to get the version number when I run npm run docker-push so it will automatically tag the release with the version number of the package.json. How can I achieve this?
You can use the environment variable npm_package_version.
Tip: To see all available environment variables set by npm you can add "printenv | grep npm" as a script:
{
"name": "myapp",
"version": "1.0.0",
"scripts": {
"start": "node app.js",
"version": "echo ${npm_package_version}", // return current version
"vars": "printenv | grep npm" // return all ENV vars with 'npm'
}
// ...
}
I'm beginner in nodeJs I want to install the environment to make login page with mongodb,
I create this package.json:
{
"name": "loginapp",
"version": "1.0.0",
"description": "simple app",
"main": "app.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "test test",
"license": "ISC",
"dependencies":{
"bcryptjs":"*",
"body-parser":"*",
"connect-flash":"*",
"cookie-parser":"^1.4.1",
"express":"*",
"express-handlebars":"*",
"express-messages":"*",
"express-session":"*",
"express-validator":"*",
"mongobd":"*",
"mongoose":"*",
"passport":"*",
"passport-http":"*",
"passport-local":"*"
}
}
and when I wanted to install with npm install I found this error :
img-error
thank's for helping ..