qualscan

Qualscan = Quality Scanner

Qualscan analizes any type of project built on Javascript (NPM module, backend app, frontend app, etc).

Purpose • Installation • Usage • Using config file • Reporters • API • Budget • CI / CD • Test • License

Purpose

A CLI tool to run multiple plugins in order to check the quality of your Javascript project.
List of features:

• security audit of your dependencies
• check dependencies updates
• check code duplications
• check project's size (bundle's size, number of files)
• check project's structure (readme, license, etc)
• check exact version of dependencies
• check dependencies (missing or unused)
• check dependencies size (number of dep, actual size, tree's depth)
• require time of entrypoint (loading time when we require your project)

In addition you can run all you custom scripts.
It will give you a global score based on the number of successful tasks.

Output

This tool will basically returns 1 if, at least, one task has failed, otherwise it returns 0.

Basic error output:

A task is considered as successful if the fail threhsold (see budgets) has not been exceeded. warn of info thresholds will bring you more information but the task will be considered as successful even if the thresholds are exceeded.

Installation

$ npm install qualscan -g

Usage

$ qualscan

Options

Display all existing options

$ qualscan -h

Run only a set of tasks

$ qualscan --tasks security-audit updates

Run only a set of scripts

$ qualscan --scripts test

Display tasks messages

$ qualscan -v

Display tasks messages by level

$ qualscan -v -l warn

Level	Description
all	(default) display all logs
error	Display errors only
warn	Display warnings & errors
info	Display info & errors & warnings

Send custom args to jscpd

$ qualscan -cda "--ignore tests/resources/code_duplication_failed/*"

For a full list of possible arguments, please follow this documentation: Jscpd doc.

Check exact version for dev dependencies

$ qualscan -devd

Export current configuration

$ qualscan exportConf

Using Config file

Qualscan can use a configuration file instead of a list of options.

You can specify your configuration file in two different ways:

• Use .qualscanrc file
  By default, Qualscan will check if .qualscanrc file is present in the current directory. You can find an example here.

{
    "scripts": ["linter"],
    "tasks": [
      "code-duplication",
      "security-audit",
      "updates",
      "package-check",
      "dependencies-exact-version",
      "project-size",
      "dependencies-check",
      "dependencies-size",
      "require-time"
    ],
    "code-duplication": {
        "args": "--ignore */resources/code_duplication_failed/* --gitignore"
    },
    "verbose": true,
    "level": "error"
}

• Use the option -c

$ qualscan -c /pathTo/MyConfigFile.json

Reporters

By default qualscan will use text reporter and display results in the console.
Allowed reporters:

• text
• json
• json in console

qualscan --reporters json

By default the default path to store the report is: [workingDir]/report/qualscan_report.json

Define another report directory

qualscan --reporters json --reportPath "myCustomDir/"

To display json in console

qualscan --reporters json --reportPath ""

API

const qualscan = require('qualscan')
const report = await qualscan.run({
  tasks: ['code-duplication', 'project-size'],
  scripts: ['linter'],
  reporters: ['json'],
  reportPath: '' // return the report as JSON object
}, 'path/to/my/project')

Budget

The notion of budget comes from the Webperf budget principle.
With this powerful tool you can define your own thresholds for each plugin.
The principle is the following:

• for each plugin, define your thresholds: fail, warn or info
• for each threshold set a value for every metrics

Example in config file (for project's size plugin):

{
  "project-size": {
    "budget": {
      "fail": {
        "entryCount": 150,
        "size": 3000000,
        "unpackedSize": 60000000
      },
      "warn": {
        "entryCount": 100,
        "size": 300000,
        "unpackedSize": 6000000
      }
    }
  }
}

Basic budgets output:

For a task:

• successful: if fail threshold has not been exceeded
• otherwise the task has failed

For a threshold:

• successful if all metrics are under their maximum value
• otherwise it has failed

So a task can lead to an error, a warning or an information.
Thresholds can only be passed or failed.

List of all metrics per plugin

Plugin	Key	Metric	Unit
Code duplication	code-duplication	percentageTokens	percentage of duplicated tokens
		percentage	percentage of duplicated lines
Exact version	dependencies-exact-version	dependencies	number of range version in dependencies
		devDependencies	number of range version in dev dependencies
Security audit	security-audit	critical	number of critical vulnerabilities
		high	number of high vulnerabilities
		moderate	number of moderate vulnerabilities
		low	number of low vulnerabilities
		info	number of info
Project's size	project-size	entryCount	number of files
		size	size in bytes (only files in final bundle)
		unpackedSize	unpacked size in bytes (only files in final bundle)
Dependencies updates	updates	major	number of major updates
		minor	number of minor updates
		patch	number of patch
Check dependencies	dependencies-check	missing	number of missing dependencies
		dependencies	number of unused dependencies
		devDependencies	number of unused dev dependencies
Dependencies size	dependencies-size	dependencies	number of all dependencies
		directDependencies	number of direct dependencies
		weight	total weight of node_modules folder (production)
		depth	maximum dependencies tree's depth (production)
Require time	require-time	entrypointTime	loading time of the entrypoint : require('myModule')

CI/CD

Qualscan can be easily integrated with any CI pipeline.
You can look at this basic example with github actions.

To see a typical output you can have a look at this page: actions page, and click on step "run the qualscan tool".

Basic CI output with Github actions:

Compatibility

Version	Supported	Tested
20.x	yes	yes
18.x	yes	yes
16.x	yes	yes

Test

$ npm test

Run with coverage

$ npm run coverage

Coverage report can be found in coverage/.

License

MIT