lihaoyi/Ammonite

Rock-solid shell scripting

Max

@maxstreese

@maxstreese is this question too dummy @lihaoyi ? This not working as suggested in the docs makes me wonder how to itereate and play with a script in a different way

Tom Green

@tmgreen

@lihaoyi Thanks! I'll try that. Thanks again for a great tool!

christobill

@christobill

Following my question of before. Would it possible to share a common dependency list between ammonite and sbt? After all it’s just a matter of transfoming “ and % in : . Then intellij through to the build.sbt can provide full support for .sc scripts?

Li Haoyi

@lihaoyi

maybe; i no longer use SBT so I can’t help you

christobill

@christobill

Haha @lihaoyi 🙂. Honestly it’s not for me, some people in my team are blocked with this, and they want to stop using ammonite because of it. I tried mill yesterday, if the intellij support is good (it seems to be provided) then maybe it solves my problem

Jakub Dubovsky

@james64

How about my question about shell-scripting above? sorry to bump but I am really curious...

Li Haoyi

@lihaoyi

for scripting i would us the os.* APIs instead of ammonite.ops

you can import the ammonite.ops functions but os.* reads much better in my opinion

ziggystar

@ziggystar

Hi. I have a Path that refers to a file in ammonite-ops, and I want the directory portion of it (complement of baseName). How can I do this?

Jakub Dubovsky

@james64

@lihaoyi sounds good. Is there any brief doc for this lib so I have something to start with? I see just bunch of import os._s and os.Pathin method definitions but that's it. Maybe I am missing something...

Li Haoyi

@lihaoyi

myPath / os.up

github.com/lihaoyi/os-lib

plenty of docs there

ziggystar

@ziggystar

I'm trying to pipe from one %% process into another one. After reading the docs, I'm still left puzzling., How can I do this?

Li Haoyi

@lihaoyi

you can’t, use os.proc

Pascal Mengelt

@pme123

Does anyone have an answer to this question? https://stackoverflow.com/questions/57557742/ammonite-how-to-use-another-script-from-an-ivy-dependency

Haifeng Li

@haifengl

Is it possible to configure REPL to print expression result on a new line? My expressions toString generally creates a multi-line output (e.g. matrix, data frame, etc.). By default, REPL prints the data type and first line together, which breaks the format.

Haifeng Li

@haifengl

@lihaoyi any suggestions to my above question? Thanks!

Li Haoyi

@lihaoyi

you can mutate repl.pprinter() = to one that prints a newline first before delegating to the old one

Haifeng Li

@haifengl

Thanks. Can you please show the full code to do that? I don't get how to mutate it

Li Haoyi

@lihaoyi

you’ll have to figure it out

Jacob Taylor-Hindle

@GlassAndOneHalf

Hi all, I'm working to embed Ammonite in my application, and I'd like to be able to pass an object from the application to the Ammonite environment, e.g.

def my_entrypoint(foo: Foo) = {
  // Make `foo` accessible from the script.
  ammonite.Main(...).runScript(...)
}

I see the run method on Main would allow me to do this, but I want to be able to do this when running a script non-interactively - are there any methods that would allow me to achieve this?

Pascal Mengelt

@pme123

What happens if I have a Future in my Script? Will it run in the background forever?

Li Haoyi

@lihaoyi

@GlassAndOneHalf easiest thing to do is put it on a threadlocal

Jacob Taylor-Hindle

@GlassAndOneHalf

Hey @lihaoyi - how would I go about doing that? I can easily create a new threadlocal, but how does Ammonite pick that up?

Jacob Taylor-Hindle

@GlassAndOneHalf

I managed to get it working without a threadlocal with this:

ammoniteMain
  .instantiateRepl(IndexedSeq("foo" -> foo)).map { repl =>
    repl.interp.initializePredef()
    ammonite.main.Scripts.runScript(...)
}

The only issue is that it doesn't seem to pick up the @main annotations.

Jacob Taylor-Hindle

@GlassAndOneHalf

Ah - that was my bad. All is working now! Just need to fix some issues loading scripts under the resources folder.

Brian Maso

@bmaso

@GlassAndOneHalf +1. Wish I could bookmark that.

Ackerley Tng

@ackerleytng

@lihaoyi thanks so much for ammonite and great job!!

starting out in scala, was trying stuff out in ammonite - implicit conversions don't seem to take effect in the ammonite repl. is this expected behavior? (from Scala for the Impatient)

@ import scala.collection.JavaConverters.asScalaBufferConverter 
import scala.collection.JavaConverters.asScalaBufferConverter

@ val tmp: Buffer[String] = flavors.getNativesForFlavor(DataFlavor.imageFlavor) 
cmd44.sc:1: type mismatch;
 found   : java.util.List[String]
 required: scala.collection.mutable.Buffer[String]
val tmp: Buffer[String] = flavors.getNativesForFlavor(DataFlavor.imageFlavor)
                                                     ^
Compilation Failed
@

Li Haoyi

@lihaoyi

Hi Ackerley!

not sure about JavaConversions

Theyve been deprecated for a while, wouldn’t be surprised if they don’t work properly these days

Trond Bjerkestrand

@tbje

@ackerleytng try

flavors.getNativesForFlavor(DataFlavor.imageFlavor).asScala

Worked well in my ammonite

Li Haoyi

@lihaoyi

(need to import collections.JavaConverters._ before that)

Ackerley Tng

@ackerleytng

I see, got it! so it isn't really implicit anymore. Thanks!

Eric K Richardson

@ekrich

JavaConversions were implicit but they are deprecated.

Ackerley Tng

@ackerleytng

I see, thanks!

Matthew de Detrich

@mdedetrich

Is it possible to create a forked process with ammonite-ops?

Li Haoyi

@lihaoyi

you can spawn processes using os.proc().spawn. You cannot fork JVMs https://jukkaz.wordpress.com/2010/05/27/forking-a-jvm/

Matthew de Detrich

@mdedetrich

Thanks

Jonas Amundsen

@badeball

This might be a silly question, but can I import and use a file from a SBT project in a scala-script?

Jason Pickens

@steinybot

I’m trying to follow the steps to add Ammonite to an SBT project. Now when I run Test / compile it fails with:

[error] error while loading Object, Missing dependency 'object scala.native in compiler mirror', required by /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/jre/lib/rt.jar(java/lang/Object.class)
[error] ## Exception when compiling 1 sources to /Users/jason/source/console-api/target/scala-2.13/test-classes
[error] scala.reflect.internal.MissingRequirementError: object scala in compiler mirror not found.
…

This is with sbt 1.3.5 and Scala 2.13.1

Henry Story

@bblfish

Hi @lihaoyi just wondering as your code uses a lot of the symbol notation from Scala2 what you make of its deprecation in Scala3. Did you find a good workaround?

Li Haoyi

@lihaoyi

we’ll just use strings instead

one more character to type is no big deal

we never made use of symbol specific stuff anyway

Henry Story

@bblfish

Adam Fraser

@adamgfraser

Hi. Is there a recommended best practice for avoiding having scripts exit an interactive Ammonite session if they call system.exit? I'm thinking of just checking sys.env for Ammonite being the main class and not doing the exit in that case but wanted to see if there was another recommended way.

Rey

@reyman

hi,

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