each-version
v1.0.2
Published
CLI to run a given command against each configuration of dependencies in each.json
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each-version
Overview
each-version
will take a given command and run it against all specified variations of your dependencies. An example usage
might be if you want to verify that your Angular directive library works against all your supported versions of Angular
(say 1.2.x, 1.3.x, 1.4.x, 1.5.x). You can also use this to verify that you are always working against the latest release of
a library, helping keep your dependencies green.
To accomplish this, each-version
will uninstall all specificed dependencies and install the requested versions once for
each environment specified and then run the requested command. It then aggregates the results and reports them back.
Installation
each-version
is meant to be used as either a CLI or programatically. To install:
npm install each-version
All the usual rules for npm install
in regards to CLIs apply. You can use it as a dependency
or a devDependency
.
You can install it globally. You can install locally and use it in npm run scripts. All the goodies.
Configuration
CLI usage requires a .each.json
file to be available. It must be an array of environments. All enviroments must contain
all the same dependencies. An environment has three properties:
[
{
"name": "latest",
"libs": {
"lodash": "latest"
},
"strat": "fail"
}
]
name
Can be any name. Intended for humans when reporting the results of the requested command against that environment.
libs
Key/value pairs of npm modules and valid version references. Should look like a dependencies
section of a package.json
.
Examples of valid version references:
latest
*
~4.1.0
^4.1.0
4.1.0
4.1.x
>= 4.1.0
- any valid dist tag
- basically anything you can put in a
package.json
'sdependency
section
strat
(optional, default="fail"
)
Instructions on how to handle non zero exit codes. Options are:
"fail"
(default)- reports as a failure
- outputs
stderr
- allows execution against other environments to continue
- the CLI will return a non zero exit code
"bail"
- reports as a failure
- outputs
stderr
- halts any further execution
- the CLI will return a non zero exit code
"warn"
- reports as success
- outputs
stderr
- allows execution against other environments to continue
- the CLI will return a zero exit code (assuming no other environments fail)
Usage
CLI
each command to run
, for example if I want to run my unit tests and they are using Karma:
each karma start
The command will return a zero/non zero exit code based on the results of the command and the configuration of your
.each.json
. See "strat" in this README.
Programmatic
The library will return a promise with the results of the command against each environment. Example:
const each = require('each-version');
const config = require('./.each.json');
each(`karma start`, config)
.then(results => {
const failures = results
.filter(result => !result.pass)
.map(result => `"${result.environment}"`);
console.log(failures.length === 0 ? 'Success!' : `Failed in the following environments: ${failures.join(', ')}`);
})
.catch(err => {
console.error(`"${err.command}" failed under environment ${err.environment}.`, err.error);
});
Performance
A naive implementation is being used for the initial release. Performance improvements could definitely be added down the road.
Node version dependency
This library requires at a minimum, node.js version 4.
License
MIT License