plam4u

Backup

1. Copy both id_rsa and id_rsa.pub from ~/.ssh/ to a USB drive. Identify the private key by executing the following command.

   gpg --list-secret-keys --keyid-format LONG
   

2. It will show something similar to this.

   sec   4096R/3AA5C34371567BD2 2016-03-10 [expires: 2017-03-10]
   

plam4u

Brew Bundle Brewfile Tips

Copyright & License

Unless otherwise noted (either in this file or in a file's copyright section) the contents of this gist are Copyright ©️2020 by Christopher Allen, and are shared under spdx:Creative Commons Attribution Share Alike 4.0 International (CC-BY-SA-4.) open-source license.

Sponsor

If you more tips and advice like these, you can become a monthly patron on my GitHub Sponsor Page for as little as $5 a month; and your contributions will be multipled, as GitHub is matching the first $5,000! This gist is all about Homebrew, so if you like it you can support it by donating to them or becoming one of their Github Sponsors.

plam4u

protocol CustomKeyCodable: Codable {
    init()
}

extension CustomKeyCodable {
    init(from decoder: Decoder) throws {
        self.init()

        let container = try decoder.container(keyedBy: AnyCodingKey.self)
        let mirror = Mirror(reflecting: self)

plam4u

Automatic build versions from git in Xcode (and other goodies)

Installation procedure for pre-build actions to automatically populate Xcode Info.plist with dynamic data.

1. Xcode Scheme pre-action

Edit Xcode Scheme and add a pre-action script. Copy the contents of preaction.sh into the pre-action script box.

plam4u

// Run any SwiftUI view as a Mac app.

import Cocoa
import SwiftUI

NSApplication.shared.run {
    VStack {
        Text("Hello, World")
        	.padding()
            .background(Capsule().fill(Color.blue))

plam4u

extension UITapGestureRecognizer {
    
    func didTapAttributedTextInLabel(label: UILabel, inRange targetRange: NSRange) -> Bool {
        // Create instances of NSLayoutManager, NSTextContainer and NSTextStorage
        let layoutManager = NSLayoutManager()
        let textContainer = NSTextContainer(size: CGSize.zero)
        let textStorage = NSTextStorage(attributedString: label.attributedText!)
        
        // Configure layoutManager and textStorage
        layoutManager.addTextContainer(textContainer)

plam4u

import XCTest

class NotificationTestCase: XCTestCase {

    func testTriggerNotification() {
        expectation(forNotification: .fooBar,
                    object: nil,
                    handler: nil)

        let notificationCenter = NotificationCenter.default

plam4u

To remove a submodule you need to:

• Delete the relevant section from the .gitmodules file.
• Stage the .gitmodules changes git add .gitmodules
• Delete the relevant section from .git/config.
• Run git rm --cached path_to_submodule (no trailing slash).
• Run rm -rf .git/modules/path_to_submodule (no trailing slash).
• Commit git commit -m "Removed submodule "
• Delete the now untracked submodule files rm -rf path_to_submodule

plam4u

Pushing to Multiple Git Repos

If a project has to have multiple git repos (e.g. Bitbucket and Github) then it's better that they remain in sync.

Usually this would involve pushing each branch to each repo in turn, but actually Git allows pushing to multiple repos in one go.

If in doubt about what git is doing when you run these commands, just

plam4u

extension UITableView {

  /// Variable-height UITableView tableHeaderView with autolayout
  ///
  /// Source: https://gist.github.com/marcoarment/1105553afba6b4900c10
	func layoutTableHeaderView() {

		guard let headerView = self.tableHeaderView else { return }
		headerView.translatesAutoresizingMaskIntoConstraints = false