package_json_schema

Load a package.json file as a PackageJson struct.

Why?

You want to load a package.json file and interact with it as a struct.

Installation

Add this line to the dependencies section of your Cargo.toml:

package_json_schema = "0.1.0"

If you would like to include validation then add the validate feature. This will validate all the fields the loaded json. Emails, the package name, the version.

package_json_schema = { version = "0.1.0", features = ["validate"] }

Usage

The following example shows how to load a package.json file and use it as a struct.

use package_json_schema::PackageJson;

let contents = r###"
{
  "name": "my-package",
  "version": "0.1.0",
  "dependencies": {
    "@sveltejs/kit": "1.0.0-next.396"
  },
  "peerDependencies": {
    "aws-sdk": "2.1185.0"
  }
}
"###;

let package_json = PackageJson::try_from(contents).unwrap();
assert_eq!(package_json.name.unwrap(), "my-package");
assert_eq!(package_json.version.unwrap(), "0.1.0");

This crate leaves it to the user to load the package.json content from the filesystem. Here is an example of loading the file contents and parsing the contents into a struct.

use std::fs::read_to_string;
use package_json_schema::PackageJson;

let contents = read_to_string("./tests/fixtures/1/package.json").unwrap();
let package_json = PackageJson::try_from(contents).unwrap();

assert_eq!(package_json.name.unwrap(), "test");

A package.json file can also be created from a builder.

use package_json_schema::PackageJson;
use package_json_schema::AdditionalFields;
use package_json_schema::Person;
use indexmap::IndexMap;

let mut additional_fields: AdditionalFields = IndexMap::new();
additional_fields.insert("custom".into(), "value".into());

let package_json = PackageJson::builder()
  .name("awesome")
  .author(Person::String("Tester".into()))
  .other(additional_fields)
  .build();
let string_value = package_json.try_to_string().unwrap();

assert_eq!(
  string_value,
  r#"{"name":"awesome","author":"Tester","custom":"value"}"#
);

To validate the package.json fields, enable the validate feature.

package_json_schema = { version = "0.1.0", features = ["validate"] }

And then use the validate method.

use std::fs::read_to_string;
use package_json_schema::PackageJson;
#[cfg(feature = "validate")]
use validator::Validate;

let contents = read_to_string("./tests/fixtures/1/package.json").unwrap();
let package_json = PackageJson::try_from(contents).unwrap();

#[cfg(feature = "validate")]
package_json.validate().unwrap();

License

This project is licensed under the Unlicense license.