How to edit scripts through an "editor extension"?

Questions & Answers
1

I’m coding an editor extension that will create a “first person controller” in just a few seconds through a graphical interface (no need for coding), to speed the workflow up, both for me, and for others who might think this is usefull aswell. I’ve created a system for creating the visible stuff (collider, camera etc.), but it also need to create a script, add some lines of code to it, save it and apply it to the object (which I hope is possible)!

Ps. I use C#.

I appreciate all help I can get!

Thanks!

/TheDDestroyer12

2

formatting is less than ideal to reduce the number of lines posted, but it’s still readable.

using UnityEngine;
using UnityEditor;
using System.IO;

public class CodeGenerator : EditorWindow
{
    [MenuItem("Answers/CodeGenerator", false, 1000)]
    public static void CodeGen() { GetWindow<CodeGenerator>(); }

    private string _assetsFolder, _scriptsFolder, _scriptName;

    void OnEnable()
    {
        if (string.IsNullOrEmpty(_assetsFolder)) _assetsFolder = Directory.GetCurrentDirectory() + @"/Assets/";
        if (string.IsNullOrEmpty(_scriptsFolder)) _scriptsFolder = _assetsFolder + @"Scripts/";
        if (!File.Exists(_scriptsFolder)) Directory.CreateDirectory(_scriptsFolder);
        if (string.IsNullOrEmpty(_scriptName)) _scriptName = @"GeneratedScript";
    }

    void OnGUI()
    {
        EditorGUILayout.BeginHorizontal();
        _scriptName = EditorGUILayout.TextField(@"Filename:", _scriptName);
        EditorGUILayout.EndHorizontal();
        EditorGUILayout.BeginHorizontal();
        if (GUILayout.Button(@"Gen Code")) GenerateCode();
        EditorGUILayout.EndHorizontal();
        EditorGUILayout.BeginHorizontal();
        EditorGUILayout.LabelField(@"Compiling: ", EditorApplication.isCompiling ? @"Yes" : @"No");
        EditorGUILayout.EndHorizontal();
    }

    void Update() { if (EditorApplication.isCompiling) EditorApplication.isPlaying = false; }

    void GenerateCode()
    {
        var scriptFilename = _scriptsFolder + _scriptName + @".cs";
        var script = string.Format("using UnityEngine;

public class {0} : MonoBehaviour
{{}}
", _scriptName);
File.WriteAllText(scriptFilename, script);
AssetDatabase.Refresh(); // Force recompile - can be SLOW…
}
}