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Npm with package.json inheritance ⛺

dry-dry 최신버젼 다운로드

최종 버전 다운로드 (.zip)

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# DRY - Use npm across multiple projects without repeating yourself

### Get it

```bash
$ npm i -g dry-dry
```

### Use it

```bash
$ dry init
```

### The copy/paste madness

Because companies and other groups have bunch of `package.json` attributes that are the same across all npm projects.
Those attributes must be maintained using copy/paste across all projects.
This is wrong !

We believe that those attributes should be easily distributed and updated across projects.

### The version management madness

Because most of multi module project use multiple version of the same dependencies.
Bundling an application with those modules may be challenging.

Dry provide a mecanism to centralize dependencies version management.

### Do not repeat yourself

`dry` is a stupid `npm` wrapper allowing any `package.json` to extend a parent file.
The parent file can be located on the system or simply inside a published npm module.

### How does it work

On each `dry` command, `dry`:

* creates a merged `package.json` based on the provided `package-dry.json`
* runs the `npm` command
* applies the possible `package.json` modifications made by `npm` to `package-dry.json`
* removes `package.json`

`package.json` is always removed to make sure that nobody will execute a pure `npm` command in a `dry` project.

### Inheritance in action

![](https://raw.githubusercontent.com/Cosium/dry-dry/master/dist-test.png)

##### Parent project

package-dry.json

```json
{
    "name": "parent",
    "version": "1.0.0",
    "description": "",
    "main": "index.js",
    "scripts": {
        "test": "echo \"Error: no test specified\" && exit 1",
        "foo": "npm help"
    },
    "keywords": [],
    "author": "",
    "license": "ISC",
    "dependencyManagement": {
        "dependency-one": "1.0.0",
        "dependency-two": "2.0.0",
        "dev-dependency-one": "1.1.0",
        "dev-dependency-two": "2.2.0"
    }
}
```

##### Child project

package-dry.json

```json
{
    "name": "child",
    "version": "1.0.0",
    "description": "",
    "main": "index.js",
    "scripts": {
        "test": "echo \"Error: no test specified\" && exit 1"
    },
    "keywords": [],
    "author": "",
    "license": "ISC",
    "dry": {
        "extends": "parent/package-dry.json",
        "dependencies": {
            "parent": "1.0.0"
        }
    },
    "dependencies": {
        "dependency-one": "managed",
        "dependency-three": "1.2.3"
    },
    "devDependencies": {
        "dev-dependency-two": "managed",
        "dev-dependency-three": "1.2.3"
    }
}
```

Merged package.json

```json
{
  "name": "child",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "foo": "npm help"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
     "dependency-one": "1.0.0",
     "dependency-three": "1.2.3"
  },
  "devDependencies": {
     "dev-dependency-two": "1.1.0",
     "dev-dependency-three": "1.2.3"
  }
}
```

### package-dry.json

To do that, `dry` introduces a file named `package-dry.json`.
`package-dry.json` replaces `package.json` in your dry projects.
Of course, it can contain all the attributes of `package.json` with the addition of an attribute called `dry`.

package-dry.json `dry` attribute has 2 optional attributes:

* `extends` - The parent of the current dry package
* `dependencies` - The dependencies needed to resolve the file pointed by `extends`. Those dependencies will not be saved to your project.

### dry commands

`dry` proxies all received arguments to `npm`.
Just take your usual npm commands and replace the word `npm` with `dry`.

| npm         | dry         |
| ----------- | ----------- |
| npm init    | dry init    |
| npm i       | dry i       |
| npm install | dry install |
| npm publish | dry publish |
| npm x y z   | dry x y z   |

#### dry commands : additional parameters

The dry command accepts some additional parameters

* --dry-packager `packager_cli_name` : specify the nodejs packager cli to proxy (default : `npm`, possible values: `npm|pnpm|yarn`)
* --dry-keep-package-json' : when provided the generated `package.json` file is not deleted
* --dry-save-package-json-to' `target_file_path` : when provided a copy of the generated `package.json` file is done to `target_file_path` location

Other handled parameters:

* --loglevel trace|debug|info|warn|error: log set to a specific level
* -s, --silent: --loglevel error
* -q, --quiet: --loglevel warn
* -d: --loglevel info
* -dd, --verbose: --loglevel debug
* -ddd: --loglevel trace

#### dry : using a custom package manager

Dry use by default `npm` and it also allows using another package manager like `pnpm` and `yarn` trough the parameter `--dry-packager`.

If you're not using one of the configured packagers or if you need to extend an existing packager then you can provide to 
the `--dry-packager` parameter a path to a 'Package Manager Descriptor' json file.

All package manager available in Dry are defined using a 'Package Manager Descriptor'.
It provides to Dry which command it needs to execute and how to handle and map dry supported arguments

```json

{
    "extends": "",
    "packageManager": "", 
    "installParentCommandTemplate": "", 
    "preventPackageJsonChangeFromParentInstall": true|false,
    "mappedArguments" : [
        { 
            "arguments": [""],
            "expectSubArgument": true|false,
            "allowArgInInstallParentCommand": true|false,
            "mappedArgumentValues": {
                "": [""],
                "": [""],
                "": [""]
            }
        },
        { 
            "arguments": [""],
            "allowArgInInstallParentCommand": true|false,
            "mappedTo" : [""]
        }
 	]
}        
```

DryPackagerDescriptor

| property                                  | description                                                                                           |
| ----------------------------------------- | ----------------------------------------------------------------------------------------------------- |
| extends                                   | string : If the package manager you plan to use is just a wrapper around another existing one. You can provide his key (npm|yarn|pnpm). A relative/absolute file path is also accepted (Ex: [pnpm.json](packagerDescriptorTemplates/pnpm.json)                         |
| packageManager                            | string : The package manager cli name to invoke. Must be available in PATH                            |
| installParentCommandTemplate              | string : the command template to use to install the parent of the current dry package in the node_modules folder. Preferably, this command should not modify the "package.json" file. The command must contains '{0}' which will be replaced by the dependency to install.'{0}' will be replaced by 'parent@0.0.1' or a packed file path 'file://path/to/package.tgz'                                                               |
| preventPackageJsonChangeFromParentInstall | boolean : If the command provided in "installParentCommandTemplate" do modify the "package.json" file then turning on this boolean will restore the "package.json" file                                                                                                |
| mappedArguments                           | ArgumentMapping[]: list of mapped arguments                                                           |

ArgumentMapping

| property                                  | description                                                                                           |
| ----------------------------------------- | ----------------------------------------------------------------------------------------------------- |
| arguments                                 | string[]: Contains the list of handled arguments                                                      |
| expectSubArgument                         | boolean : Indicate if the provided arguments expect an associated value. If 'false' then 'mappedTo' must be provided. If 'true' then 'mappedArgumentValues' must be provided                                                                                    |
| allowArgInInstallParentCommand            | boolean : Indicate if the mapping result can also be added to the "installParentCommandTemplate"      |
| mappedTo                                  | string[]: The argument provided as input will be replaced by this list of argument as output          |
| mappedArgumentValues                      | Map<string, string[]> : The argument value provided as input will be used as key for this map to get the map value and return the value as the list of argument to output                                                                                              |

You can check current descriptors with the links below:

* [npm.json](packagerDescriptorTemplates/npm.json)
* [pnpm.json](packagerDescriptorTemplates/pnpm.json)
* [yarn.json](packagerDescriptorTemplates/yarn.json)

[travis-image]: https://travis-ci.org/Cosium/dry-dry.svg?branch=master
[travis-url]: https://travis-ci.org/Cosium/dry-dry
[prettier-image]: https://img.shields.io/badge/code_style-prettier-ff69b4.svg
[prettier-url]: https://github.com/prettier/prettier

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