Author: Smin Rana

Create zip file in dart
Creating a zip file in Dart is not that hard. Though there are not many packages right now to work with, so far we have only two packages which we can use to create zip, tar and others in dart.

If you have not installed dart yet please go to my post here.

Visit Pub Dev where you can find all kinds of packages for Flutter and Dart. Some packages work with both Flutter and Dart but not all of them.

Go to https://pub.dev/ and search zip you will find these two packages
1. Archive https://pub.dev/packages/archive, for Dart and Flutter.
2. Flutter Archive https://pub.dev/packages/flutter_archive for only Flutter project.
In our case we will use the Archive package since we are testing in a console application.

The Archive library currently supports the following decoders:
- Zip (Archive)
- Tar (Archive)
- ZLib [Inflate decompression]
- GZip [Inflate decompression]
- BZip2 [decompression]
Add Archive package in your project

With Dart
```
dart pub add archive
```
With Flutter
```
flutter pub add archive
```
Our pubspec.yaml
```
name: Create zip file in dart
description: A sample command-line application to create zip file
version: 1.0.0
homepage: https://flutterframework.com/

environment:
  sdk: '>=2.10.0 <3.0.0'

dependencies:
  archive: ^3.1.2

dev_dependencies:
  pedantic: ^1.9.0
  test: ^1.14.4
```
Our main zip.dart
```
import 'package:zip/zip.dart' as zip;

void main(List<String> arguments) {
  zip.createZip();
}
```
and lib/zip.dart
```
import 'dart:io';

import 'package:archive/archive.dart';
import 'package:archive/archive_io.dart';

void createZip() {
  final logDir = Directory.current.path + '/log';
  final zipLocation = Directory.current.path + '/log.zip';

  var encoder = ZipFileEncoder();
  encoder.zipDirectory(Directory(logDir), filename: zipLocation);

  // Manually create a zip of a directory and individual files.
  encoder.create(Directory.current.path + '/log2.zip');
  encoder.addFile(File('another_file.txt'));

  encoder.close();
}
```
Line number 10 creates a zip file in the destination file(line 8), from line 7 which is a directory containing few txt files.

You can create more zip file in the same encoder process, line 16 and more file line 17.

Download the source code from github.com

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May 3, 2021
Flutter app design resources for iOS and Android
List of flutter app design resources

iOS Design Resources
Android Design Resources
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May 2, 2021
Git worktree example
Git worktree is great a way to separate your code without having to create a new branch when you are not yet ready to commit.

I have created a new repo in GitHub and cloned in a dir ‘worktree-example’.
```
git clone [email protected]:sminrana/git-worktree-example.git
```
Open the dir with code . command and update the readme.md file. Now we can push it to main branch.
```
git add README.md 
git commit -m "message"
git push origin main
```
It’s time to create our first worktree. We will put our worktree one dir up from our current dir where our main branch is. The documentation says -d flag with single hyphen but two hypen worked for me.
```
git worktree add --d ../test 
```
Now open test folder and open it in code . and make some changes in readme file then commit. Since worktree is detached HEAD you can’t commit to anywhere, for this we have create a new branch from here, run following command.
```
git switch -c dev
git push origin dev
```
You can remove worktree
```
git worktree remove test
```
and remove completely from ref.
```
git worktree prune
```
That’s all you needed. More git worktree commands
```
git worktree add --d ../hotfix 
git worktree remove hotfix
git worktree prune

Throwaway working tree
git worktree add --d <path>
```
Download source code

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April 13, 2021