Scala Scripting Scala By the Bay, San Francisco, 12 Nov 2016 Scala - - PowerPoint PPT Presentation

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Scala Scripting Scala By the Bay, San Francisco, 12 Nov 2016 Scala - - PowerPoint PPT Presentation

Dec 05, 2023 242 likes •673 views

Scala Scripting Scala By the Bay, San Francisco, 12 Nov 2016 Scala has a code-size gap Scala REPL: lightweight, works great for < 1 line programs, more is problematic Scala has a code-size gap Scala REPL: lightweight, works great for < 1

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Scala Scripting

Scala By the Bay, San Francisco, 12 Nov 2016

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic

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Scala has a code-size gap

SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Scala has a code-size gap

  • bject Main{

def main(args: Array[String]): Unit = { println("Hello") } }

SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Scala has a code-size gap

SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Scala has a code-size gap

SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Scala has a code-size gap

SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Scala has a code-size gap

SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

?

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

Ammonite Scala REPL/Scripts

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Ammonite: Scala Scripting lihaoyi.github.io/Ammonite

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Ammonite-REPL

Like the Scala REPL,

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Ammonite-REPL

Like the Scala REPL, but better

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Ammonite-Scripts

Write Scala without the fuss

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Demo: Ammonite REPL

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic Ammonite REPL: lightweight, works great for 1 - 10 line programs SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic Ammonite REPL: lightweight, works great for 1 - 10 line programs Ammonite Scripts: works for 10 - 1,000 line programs SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Demo: Ammonite Scripts

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Like running scripts with the `scala` command but...

Can you use third party libraries?

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Like running scripts with the `scala` command but...

Can you use third party libraries?

  • Can you import other scripts?
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Like running scripts with the `scala` command but...

Can you use third party libraries?

  • Download jar yourself, download transitive dependencies, use `-cp`, ...

Can you import other scripts?

  • No
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Like running scripts with the `scala` command but...

Can you use third party libraries?

  • import $ivy.`com.lihaoyi::scalatags:0.6.2`

Can you import other scripts?

  • import $file.foo
  • import $file.foo.bar
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Like running scripts with the `scala` command but...

Can you use third party libraries?

  • import $ivy.`com.lihaoyi::scalatags:0.6.2`
  • libraryDependencies += "com.lihaoyi" %% "scalatags" % "0.6.2"

Can you import other scripts?

  • import $file.foo
  • import $file.foo.bar
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Like running scripts with the `scala` command but...

Can you use third party libraries?

  • import $ivy.`com.lihaoyi::scalatags:0.6.2`
  • libraryDependencies += "com.lihaoyi" %% "scalatags" % "0.6.2"

Can you import other scripts?

  • import $file.foo // loads foo.sc
  • import $file.foo.bar // loads foo/bar.sc
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Demo: Ammonite Script Imports

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Demo: Ammonite Website

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic Ammonite REPL: lightweight, works great for 1 - 10 line programs Ammonite Scripts: works for 10 - 1,000 line programs SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Use Cases

www.lihaoyi.com www.lihaoyi.com/Resume github.com/lihaoyi/Ammonite/blob/master/ci/build.sc

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Next Steps

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Next Steps: need more usage

  • Currently about 6-7k downloads a month
  • More users = more edge cases get found, more help fixing bugs,
  • More users = more info to help set direction of development
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Next Steps: need more contributors!

  • Lots of people contributing fixes, but still mostly me driving development
  • Script-runner was mostly built by two GSOC interns, but they've moved on
  • Need more people to sustainably drive project forward
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Next Steps: concrete tasks

  • IntelliJ support for scripts
  • Convert autocomplete to use 2.12 REPL's improved autocomplete
  • Experiment with using shapeless for more stable pretty-printing
  • Better SBT integration: re-use compiler settings? Plugins?
  • Spark support??
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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

?

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Scala has a code-size gap

Scala REPL: lightweight, works great for < 1 line programs, more is problematic Ammonite REPL: lightweight, works great for 1 - 10 line programs Ammonite Scripts: works for 10 - 1,000 line programs SBT: Works great for 1,000 - 100,000 line programs, overkill for small scripts

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Scala Scripting

Scala By the Bay, San Francisco, 12 Nov 2016

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Q & A