SwiftPoet

SwiftPoet is a library that is inspired from https://github.com/square/javapoet to help Swift developers easy to generate Swift source code.

Instruction

Cocoapods:

pod 'SwiftPoet', :git => 'git@github.com:jupitervn/SwiftPoet.git'

Swift file:

In order to generate swift file, you can use SwiftFile.newFile() or SwiftFile.newSingleClass() method. Example:

let swiftFile = SwiftFile
        .newFile({file_name})
        .addType(classSpec)
        .addMethod(operatorMethod)
        .build()
        .writeTo(testOutputDir)

SwiftFileBuilder will contains other methods to add variable or class/protocol/extension/enum or method or even codeblock

TypeSpec

Please use these static methods to construct a class/protocol/struct/enum/extension

public static func newClass(name: String) -> TypeSpecBuilder
public static func newProtocol(name: String) -> TypeSpecBuilder
public static func newStruct(name: String) -> TypeSpecBuilder
public static func newEnum(name: String, indirect: Bool = false) -> TypeSpecBuilder
public static func newExtension(ofType: String) -> TypeSpecBuilder

Example

 let classSpec = try? TypeSpec.newClass("TestClass")
      .addProperty(FieldSpecBuilder(name: "field01", fieldType: "Int").initWith("1").build())
      .addProperty(FieldSpecBuilder(name: "field02", fieldType: "String").initWith("\"abc\"").build())
      .addProperty(FieldSpecBuilder(name: "field03").modifiable().initWith("\"abc\"").build())
      .addMethod(MethodSpec.initBuilder().addParam(ParameterSpec(name: "name", paramType: "String")).build())
      .build()
    
    let swiftFile = SwiftFile
      .newSingleClass("sample_class01_output", classSpec: classSpec!)
      .build()
      .writeTo(testOutputDir)

will generate this file

class TestClass {
  let field01: Int = 1
  let field02: String = "abc"
  var field03 = "abc"

  init(name: String) {
  }

}

CodeBlock

In order to construct a codeblock, please use: CodeBlock.newCodeBlock() {} .statement() is used to insert a new statement inside codeblock .beginControlFlow() will start a block of control flow and handle all the indents for you .nextControlFlow() is used to generate else clause '.endControlFlow()` will close the current block of control flow.

Example:

let codeBlock = CodeBlock.newCodeBlock() { codeBlock in
      codeBlock.beginControlFlow("if (param == \"test\")")
        .statement("return 123")
        .nextControlFlow("else")
        .statement("return 456")
        .endControlFlow()
    }

will generate this piece of code

if (param == "test") {
      return 123
    } else {
      return 456
    }