Add an option to get the String representation of PBXProj

[Ibrahimhass]

Context 🕵️‍♀️

I want to modify a pbxproj in memory to later add it to an in-memory archive.
This is needed because we are making a server-side Swift application.
Since it is a server-side application, it would be great to get the modified pbxproj without any extra disk I/O operations.
The current APIs cannot achieve this without first writing the pbxproj to disk.

What 🌱

The project generates a String representation of the pbxproj internally before saving to disk.
Below is the relevant code block inside PBXProj.swift.

extension PBXProj: Writable {
    public func write(path: Path, override: Bool) throws {
        try write(path: path, override: override, outputSettings: PBXOutputSettings())
    }

    public func write(path: Path, override: Bool, outputSettings: PBXOutputSettings) throws {
        let encoder = PBXProjEncoder(outputSettings: outputSettings)
        let output = try encoder.encode(proj: self)
        if override, path.exists {
            try path.delete()
        }
        try path.write(output)
    }
}

Proposal 🎉

With the following simple refactor, this can be achieved with ease.

extension PBXProj: Writable {
    public func write(path: Path, override: Bool) throws {
        try write(path: path, override: override, outputSettings: PBXOutputSettings())
    }

    public func write(path: Path, override: Bool, outputSettings: PBXOutputSettings) throws {
        let output = try encodeAsString(outputSettings: outputSettings)
        if override, path.exists {
            try path.delete()
        }
        try path.write(output)
    }
    
    public func encodeAsString(outputSettings: PBXOutputSettings) throws -> String {
        let encoder = PBXProjEncoder(outputSettings: outputSettings)
        return try encoder.encode(proj: self)
    }
}