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https://github.com/ra1028/swift-mod

A tool for Swift code modification intermediating between code generation and formatting.
https://github.com/ra1028/swift-mod

ast cli code-generator code-modification formatter swift swiftsyntax

Last synced: 6 days ago
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A tool for Swift code modification intermediating between code generation and formatting.

Host: GitHub
URL: https://github.com/ra1028/swift-mod
Owner: ra1028
License: apache-2.0
Created: 2019-12-16T19:10:36.000Z (about 5 years ago)
Default Branch: master
Last Pushed: 2024-11-27T05:25:43.000Z (about 2 months ago)
Last Synced: 2025-01-06T07:09:33.872Z (13 days ago)
Topics: ast, cli, code-generator, code-modification, formatter, swift, swiftsyntax
Language: Swift
Homepage:
Size: 125 KB
Stars: 107
Watchers: 5
Forks: 10
Open Issues: 0
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md

Awesome Lists containing this project

fucking-awesome-swift - swift-mod - A tool for Swift code modification intermediating between code generation and formatting. (Libs / Quality)
awesome-swift - swift-mod - A tool for Swift code modification intermediating between code generation and formatting. (Libs / Quality)
awesome-swift - swift-mod - A tool for Swift code modification intermediating between code generation and formatting. ` 📝 a year ago ` (Quality [🔝](#readme))
awesome-swift - swift-mod - A tool for Swift code modification intermediating between code generation and formatting. (Libs / Quality)

README

        # swift-mod

A tool for Swift code modification intermediating between code generation and formatting.

[![swift](https://img.shields.io/badge/language-Swift5-orange.svg)](https://developer.apple.com/swift)

[![release](https://img.shields.io/github/release/ra1028/swift-mod.svg)](https://github.com/ra1028/swift-mod/releases/latest)

[![test](https://github.com/ra1028/swift-mod/workflows/GitHub%20Actions/badge.svg)](https://github.com/ra1028/swift-mod/actions)

[![lincense](http://img.shields.io/badge/License-Apache%202.0-black.svg)](https://github.com/ra1028/swift-mod/blob/master/LICENSE)

---

## Overview

`swift-mod` is a tool for Swift code modification that intermediating between code generator and formatter built on top of [apple/SwiftSyntax](https://github.com/apple/swift-syntax).  

It can generates boilerplate code, such as access control or memberwise initializers in modularized source code, taking into account the state of the [AST](https://en.wikipedia.org/wiki/Abstract_syntax_tree).  

You can improve your productivity for writing more advanced Swift codes by introducing `swift-mod`.  

### Example

- **Before**

```swift

struct Avenger {

    var heroName: String

    internal var realName: String?

}

let avengers = [

    Avenger(heroName: "Iron Man", realName: "Tony Stark"),

    Avenger(heroName: "Captain America", realName: "Steve Rogers"),

    Avenger(heroName: "Thor"),

]

```

- **After**

```diff

+ public struct Avenger {

+     public var heroName: String

    internal var realName: String?

+     public init(

+         heroName: String,

+         realName: String? = nil

+     ) {

+         self.heroName = heroName

+         self.realName = realName

+     }

}

+ public let avengers = [

    Avenger(heroName: "Iron Man", realName: "Tony Stark"),

    Avenger(heroName: "Captain America", realName: "Steve Rogers"),

    Avenger(heroName: "Thor"),

]

```

---

## Getting Started

1. [Install `swift-mod`](#installation).

2. Generates configuration file.

```sh

swift-mod init

```

3. Check the all modification rules.

```sh

swift-mod rules

swift-mod rules --rule [RULE NAME] # Display more detailed rule description

```

4. Edit your configuration file with an editor you like, refering to the [documentation](#configuration).

5. Run

```sh

swift-mod 

```

---

## Command Usage

```sh

swift-mod [COMMAND] [OPTIONS]

```

All commands can be display a usage by option `-h/--help`.

- `run` (or not specified)

```

OVERVIEW: Runs modification.

USAGE: swift-mod run [--mode ] [--configuration ] [ ...]

ARGUMENTS:

                   Zero or more input filenames.

OPTIONS:

  -m, --mode                    Overrides running mode: modify|dry-run|check. (default: modify)

  -c, --configuration  The path to a configuration file.

  -h, --help                          Show help information.

```

- `init`

```

OVERVIEW: Generates a modify configuration file.

USAGE: swift-mod init [--output ]

OPTIONS:

  -o, --output    An output for the configuration file to be generated.

  -h, --help              Show help information.

```

- `rules`

```

OVERVIEW: Display the list of rules.

USAGE: swift-mod rules [--rule ]

OPTIONS:

  -r, --rule        A rule name to see detail.

  -h, --help              Show help information.

```

---

## Configuration

Modification rules and targets are defines with YAML-formatted file. By default, it's searched by name `.swift-mod.yml`.  

Any file name is allowed with passing with option like follows:  

```sh

swift-mod --configuration 

```

### Example

```yaml

format:

  indent: 4

  lineBreakBeforeEachArgument: true

rules:

  defaultAccessLevel:

    accessLevel: openOrPublic

    implicitInternal: true

  defaultMemberwiseInitializer:

    implicitInitializer: false

    implicitInternal: true

    ignoreClassesWithInheritance: false

```

### Format

Determines the format setting in all rules.  

Format according to this setting only when changes occur.  

|KEY|VALUE|REQUIREMENT|DEFAULT|

|:-|:-|:-|:-|

|indent|The number of spaces, or `tab` by text|Optional|4|

|lineBreakBeforeEachArgument|Indicating whether to insert new lines before each function argument|Optional|true|

### Rules

#### Default Access Level

|IDENTIFIER|OVERVIEW|

|:-|:-|

|defaultAccessLevel|Assigns the suitable access level to all declaration syntaxes if not present|

|KEY|VALUE|REQUIREMENT|DEFAULT|

|:-|:-|:-|:-|

|accessLevel|\|openOrPublic\|public\|internal\|fileprivate\|private\||Required||

|implicitInternal|Indicating whether to omit the `internal` access level|Optional|true|

```swift

struct Avenger {

    var heroName: String

    internal var realName: String?

}

```

```diff

+ public struct Avenger {

+    public var heroName: String

    internal var realName: String?

}

```

#### Default Memberwise Initializer

|IDENTIFIER|OVERVIEW|

|:-|:-|

|defaultMemberwiseInitializer|Defines a memberwise initializer according to the access level in the type declaration if not present|

|KEY|VALUE|REQUIREMENT|DEFAULT|

|:-|:-|:-|:-|

|implicitInitializer|Indicating whether to omit the `internal` initializer in struct decalaration|Optional|false|

|implicitInternal|Indicating whether to omit the `internal` access level|Optional|true|

|ignoreClassesWithInheritance|Indicating whether to skip the classes having inheritance including protocol|Optional|false|

```swift

struct Avenger {

    var heroName: String

    internal var realName: String?

}

```

```diff

struct Avenger {

    var heroName: String

    internal var realName: String?

+    init(

+        heroName: String,

+        realName: String? = nil

+    ) {

+        self.heroName = heroName

+        self.realName = realName

+    }

}

```

---

### Ignoring Rules

`swift-mod` allows users to suppress modification for node and its children by comment like below.  

- **Ignore all rules**  

`// swift-mod-ignore`  

```swift

// swift-mod-ignore

struct Avenger {

    var heroName: String

    internal var realName: String?

}

```

- **Ignore specific rule(s)**  

`// swift-mod-ignore: [COMMA DELIMITED RULE IDENTIFIERS]`

```swift

// swift-mod-ignore: defaultAccessLevel, defaultMemberwiseInitializer

struct Avenger {

    var heroName: String

    internal var realName: String?

}

```

---

## Installation

### [Swift Package Manager](https://github.com/apple/swift-package-manager)

Add the following to the dependencies of your `Package.swift`:

```swift

dependencies: [

    .package(url: "https://github.com/ra1028/swift-mod.git", from: "swift-mod version"),

]

```

Run command:

```sh

swift run -c release swift-mod [COMMAND] [OPTIONS]

```

### [Mint](https://github.com/yonaskolb/Mint)

Install with Mint by following command:

```sh

mint install ra1028/swift-mod

```

Run command:

```sh

mint run ra1028/swift-mod [COMMAND] [OPTIONS]

```

### Using a pre-built binary

You can also install swift-mod by downloading `swift-mod.zip` from the latest GitHub release.

### Swift Version Support

`swift-mod` depends on [SwiftSyntax](https://github.com/apple/swift-syntax) version that matches the toolchain version in use.  

So you should use swift-mod version that built with compatible version of Swift you are using.

|Swift Version|Last Supported `swift-mod`      |

|:------------|:-------------------------------|

|5.1          |0.0.2                           |

|5.2          |0.0.4                           |

|5.3          |0.0.5                           |

|5.4          |0.0.6                           |

|5.5          |0.0.7                           |

|5.6          |0.1.0                           |

|5.7          |0.1.1                           |

|5.8          |0.2.0                           |

|5.9          |0.2.0                           |

|5.10         |0.2.1                           |

---

## Development

Pull requests, bug reports and feature requests are welcome 🚀.  

See [CONTRIBUTING.md](./CONTRIBUTING.md) file to learn how to contribute to swift-mod.  

Please validate and test your code before you submit your changes by following commands:  

```sh

 make autocorrect # Modifying, formatting, linting codes and generating Linux XCTest manifests.  

 make test

 ```

In addition, swift-mod supports running on Linux, so you should test by installing Docker and following command:  

```sh

make docker-test

```

---

## License

swift-mod is released under the [Apache 2.0 License](https://github.com/ra1028/swift-mod/blob/master/LICENSE).