node package manager

pollinate

Pollinate

Generate a new project directly from Git(Hub) using a simple schema.

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What?

It is a command that takes a templated tree of files and generates them for new projects using data defined by a simple schema. The data can define an output name, files to discard, files to parse with the data, and files to move or rename. The template can supply the default data, and that data can be extended for each project. You can throw in any other data you'd like to be passed to the template context as well.

All templates are parsed with Nunjucks aka Jinja and Twig.

Why?

When starting new projects the quickest way is often to just copy the last project and fiddle with it until it works. This can introduce many unwanted issues, like having one client's name appear in place of the other's. This project's goal is to offer an elegant and efficient way of working with a base set of files that can be understood by looking at a single example.

Install

$ npm install -g pollinate

An example

$ pollinate howardroark/webapp --name newproject --container alpine --description="A thing that does something."

Skip to more examples...

The GitHub sourced template
.
├── PROJECT-README
├── README.md
├── Dockerfile
├── project-name
└── template.json
template.json (optional)
{
  // Core schema
  "name": "webapp",
  "parse": [
    "PROJECT-README",
    "Dockerfile"
  ],
  "discard": [
    "README.md",
    "template.json"
  ],
  "move": [
    { "PROJECT-README": "README.md" },
    { "project-name": "{{ name }}.txt" }
  ],
  // Custom defaults
  "container": "debian",
  "description": "Lorem ipsum dolor sit amet, consectetur adipiscing elit."
}

You can omit any or all of discard, parse and move.

PROJECT-README
# {{ name }}
 
{{ description }}
Dockerfile
FROM {{ container }}
The project data
{
  "name": "newproject",
  "container": "alpine",
  "description": "A thing that does something."
}
The data after extending and parsing
{
  "name": "newproject",
  "parse": [
    "Dockerfile",
    "PROJECT-README"
  ],
  "discard": [
    "README.md",
    "template.json"
  ],
  "move": [
    { "PROJECT-README": "README.md" },
    { "project-name": "newproject.txt" }
  ],
  "container": "alpine",
  "description": "A thing that does something."
}
The result
.
└── newproject
   ├── README.md
   ├── newproject.txt
   └── Dockerfile
README.md
# newproject
 
A thing that does something.
Dockerfile
FROM alpine

More options

You can specify template files as a local directory (.git will be removed)

$ pollinate ./template --name newproject --container ubuntu

You can use any Git url (.git will be removed)

$ pollinate https://github.com/howardroark/webapp.git --name newproject --container ubuntu

You can pass project data as a file

$ pollinate howardroark/webapp data.json

You can pass project data as a JSON string

$ pollinate howardroark/webapp '{"name":"newproject","container":"alpine","description":"A thing that does a thing."}'

You can pass project data as a JSON endpoint

$ pollinate howardroark/webapp https://example.com/json/data

You can generate from the default data in the template

$ pollinate howardroark/webapp

You can override data as CLI options

$ pollinate howardroark/webapp data.json --name=alternate --container=ubuntu

You can specify a command to run on completion

{
  "complete": "git init {{ name }}"
}

You can supply user specific data each time with a ~/.pollen defaults file

{
  "api_key":"secret"
}

You can preserve the commit history from the skeleton project with the --keep-history CLI option or:

{
  keepHistory: true
}

Filters

You can supply custom Nunjucks filter functions (files must be included within template)

{
  "filters": {
    "markdown": "filters/markdown.js"
  }
}
filters/markdown.js
var markdownParser = function() { ... }
 
module.exports = function(markdownText) {
  var html = markdownParser(markdownText)
  return '<div class="markdown">'+html+'</div>'
}

Parse

All parse paths are first passed to globby

{
  "parse": ["*"]
}
{
  "parse": [
    "*",
    "!templates"
  ]
}

Merge

You can specify .json files to merge

package.json

{
  "name": "@howardroark/webapp",
  "version": "1.0.0",
  "description": "project for testing pollinate with merge",
  "main": "index.js",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/howardroark/webapp.git"
  },
  "author": "Andy Edwards",
  "license": "ISC",
  "bugs": {
    "url": "https://github.com/howardroark/webapp/issues"
  },
  "homepage": "https://github.com/howardroark/webapp#readme",
  "dependencies": {
    "lodash": "^4.17.4"
  }
}

PROJECT-package.json

{
  "name": "@{{ organization }}/{{ name }}",
  "version": "1.0.0",
  "description": "{{ description }}",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/{{ organization }}/{{ name }}.git"
  },
  "author": "{{ author }}",
  "bugs": {
    "url": "https://github.com/{{ organization }}/{{ name }}/issues"
  },
  "homepage": "https://github.com/{{ organization }}/{{ name }}#readme",
}

template.json

{
  "name": "webapp",
  "description": "project for testing pollinate with merge",
  "organization": "howardroark",
  "author": "Andy Edwards",
  "parse": [
    "PROJECT-package.json"
  ],
  "merge": [
    ["package.json", "PROJECT-package.json"]
  ],
  "discard": [
    "PROJECT-package.json"
  ]
}

command

pollinate howardroark/webapp#merge-test --name myapp --description 'my new app' --organization myorg --author Me

This will overwrite package.json with the contents of package.json and PROJECT-package.json merged with lodash.merge. This is useful when you want to keep template variables out of package.json, since they would cause certain npm commands to fail.

Resulting package.json

{
  "name": "@myorg/myapp",
  "version": "1.0.0",
  "description": "my new app",
  "main": "index.js",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/myorg/myapp.git"
  },
  "author": "Me",
  "license": "ISC",
  "bugs": {
    "url": "https://github.com/myorg/myapp/issues"
  },
  "homepage": "https://github.com/myorg/myapp#readme",
  "dependencies": {
    "lodash": "^4.17.4"
  }
}

Thanks

  • @binhood for the fantastic work on the logo!
  • @jedwards1211 for the handy object merge option :)
  • @ben657 for refactoring a bunch of stuff :o