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try! Swi) Pre Talks 2019 @satoshin21
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INTRODUCE
• @satoshin21
• eureka, Inc.
• Pairs JP iOS Applica
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Have you ever wri,en scripts in
Swi3?
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How to make CLI tool with dependencies basically
1. swift init —type executable
2. Edit Package.swift
1. Add dependencies
2. Add dependencies to target
3. swift build —configuration debug (or swift run)
4. Execute ./.build/debug/{package name}
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It's boresome a bit
• It's easy to write swi. script without dependencies.
• no needs to create Package.swift file.
• But, some:mes, I just want to write simple scripts quickly.
• try awesome packages...
• write swi. codes as playgrounds...
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Let's try! swift-sh !
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What is swi)-sh ?
• Define Dependencies and write swi0 scripts too easily
• made by @mxcl (Max Howell)
• Author of Homebrew, PromiseKit.
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Install
brew install mxcl/made/swift-sh
or
mint install mxcl/swift-sh
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How to run script
• Demo
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How swi'-sh manage dependencies?
1. make build directory each script file
• mkdir -p ~/Library/Developer/swi6.-sh.cache/{filename}
2. write Package.swi;
3. make symlink script file as main.swi6
4. swift build -Xswiftc -spress-warnings
5. exec ./build/debug/{filename}
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swi$ sh run with stdin
> echo "import PromiseKit // @mxcl\nprint(Promise.value(\"Hello, World!\"))" | swift sh
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swi$ sh edit
> swift sh edit sample.swift
• Generate .xcodeproj/ file in swi$-sh cache dir
• Not working dir.
• cached swi: file is symlinked to working file.
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swi$ sh eject
> swift sh eject sample.swift
.
└── Sample
├── Package.swift
└── Sources
└── main.swift
• Generate Package.swift file.
•
⚠
swi/ file will be moved to sub directory
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⚠
Warnings
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Warning 1: too late...
// sample.swift
import PromiseKit // @mxcl ~> 6.5
print(Promise.value("Hi!"))
target elapsed +me
compiled swi, file 0.01s !
swi,-sh(no cached) 42.95s "
swi,-sh(cached) 0.67s #
• swi%-sh is build every +me, so affect execu2on 2me.
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Warning 2: cache key
• cache directory is created with swi/ file name.
> swift sh sample.swift
~/Library/Developer/swift-sh.cache
├──
└── sample
├── Package.resolved
├── Package.swift
└── main.swift
• If same file name is used, cache is shared each script.
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·ͱΊ
Write with for target user
Swi$PM ɾWant to manage targets/
dependencies strictly
ɾneeds to write test code.
swi$-sh ɾTry awesome Libraries
ɾWrite scripts quickly
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END
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