lihaoyi/Ammonite

Rock-solid shell scripting

Vladyslav Pekker

@agilesteel

hi I just downloaded ammonite for the first time and am trying out the source command which doesn't seem to work at all

@ source(Some(1).map(identity)) 
Unable to find sourcecode for class scala.Option

is this a known issue? I'm on Ubuntu 18.04 in case that matters

Alexandros Bantis

@ambantis

Hi, I'm running ammonite 1.6.6 (2.11.12). How do I have the ammonite script exit with a non-zero exit code?

Olivier Mélois

@Baccata

@ambantis you can always call System.exit(1)

Symhedonic

@Shokodemon

hello all

i would like to use repl.sess.save and repl.sess.load in my scala code, - they are visible from the predef, but i would like to use them inside a class that belongs to a different package.

from what i understand, they become available after the shell is started with Main(), but id like the following piece of code to compile as well"

//  def getArtificats(
//                                                        service: String,
//                                                        serviceVersion: String,
//                                                        serviceDependencyVersion: String,
//                                                        namespace: String
//                                                      ) {
//
//
//    val sessionTag = s"$service:$serviceVersion:$serviceDependencyVersion"
//    repl.sess.save(sessionTag)
//
//    val dep = coursier.
//      Dependency(
//        coursier.Module(namespace, service),
//        serviceVersion,
//        attributes = coursier.Attributes(classifier = "fat")
//      )
//
//    printf(s"finished fetching dependencies for $service-$serviceVersion with dependencies from version $serviceDependencyVersion")
//    repl.sess.load(sessionTag)
//    printf(s"session $sessionTag restored ")
//  }

Symhedonic

@Shokodemon

not found: value repl
[error]     repl.sess.save(sessionTag)
[error]     ^

i am using ammonite 1.3.3 and importing as a dependency in SBT, and initializing it via Main(). .

Christopher Davenport

@ChristopherDavenport

Is there a trick to run this with 2.13 presently that I’m missing?

Li Haoyi

@lihaoyi

no? the default instructions are for 2.13

it’s on maven central for 2.13

no tricks required

Yann Moisan

@YannMoisan

hello. I have some .sc files. What do you suggest to unit test code in these files ?

aappddeevv

@aappddeevv

Is there a way to have ammonite automatically reload from a classpath changed files? I was looking through the docs but did not see anything that mentions this. My scenarios is similar to that using jupyter. I typically need to develop a library but need to test and play with the data interactively while building it out--a bit like TDD but more exploratory. So there is a separate continuous build task running on the library code but I am working at the repl. Python has something like this where it re-evaluates all imported packages prior to evaluating a user-entered expression.

Dan Di Spaltro

@dispalt

is there a 2.12.9 version available?

Binh Nguyen

@ngbinh

I remember there is a way to use ammonite version that was published for scala 2.12.8 with build that set scala version to 2.12.9 but I do not recall now

Amr Hassan

@superamr_twitter

Hello. Can we get a release for 2.12.9 please? :)

Victor Ivri

@vivri

Hi there, I'm using Ammonite 1.6.9 and Scala 2.13. For some reason, Futures seem to hang, as well as the (ported) parallel collections. I saw old posts about it; has this been fixed? If so, how?

Paul Snively

@paul-snively

Does anyone know how I would go about embedding Ammonite in an app, loading a .sc file from a directory, and ensuring definitions in the .sc are visible (by name) to the app? In other words, a classic “dynamic linking” scenario.

It looks like some combination of instantiateInterpreter and processModule heads in the right direction, but the details seem hazy, especially around accessing bindings in the .sc.

Li Haoyi

@lihaoyi

@PaulAtFormation I don’t think there’s any builtin way to do that, you have to poke around the internal-ish code. Look at how Mill does it (RunScript.scala or something like that)

basically you evaluate the script and get an untyped reference to the wrapper object. Mill then uses reflection to call stuff on the wrapper object, but you could just as easily cast the wrapper object to an interface (you’ll need to make it extend the interface via a custom CodeWrapper) and then call methods directly

Piotr Jander

@mhonadh_twitter

Hi, how do I refer to the last result? Something like _ in Python or it in ghci?

Piotr Jander

@mhonadh_twitter

Ok now I see it's res0 etc

After adding ammonite to my project's build sbt, I can run ammonite with sbt test:run. However, when I do sbt test, which previously would run my unit tests, I get java.util.NoSuchElementException: None.get. Did anyone encounter this?

Li Haoyi

@lihaoyi

@superamr_twitter the latest unstable release should be on 2.12.9

Quafadas

@Quafadas

Hoping someone can give me a pointer - I'm sat behind a corporate proxy trying to use ammonite. We have nexus setup between us and maven. I have successfully downloaded some ivy's into ammonite - import $ivy.com.lihaoyi::scalatags:0.7.0 works, which I think proves proves my predefs and coursier resolvers appear to be setup correctly.

I'd like to use com.github.seratch::awscala-s3:0.8.2, but that fails with an error that looks like; download error: Caught javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: . The same import (correctly formatted!) works (inside an sbt project), so I think the problem is that somehow ammonite is missing my corporate certificate.

Does this sound right? Is there a place I could attempt to add the cert so that ammonite knows about it? Any other hints or ideas?

Alexandre Archambault

@alexarchambault

@Quafadas coursier downloads these artifacts, the error originates from it.

Are you able to reproduce that error with the coursier CLI?
Calling it like

$ coursier resolve \
    --no-default \
    -r https://your-corporate-repo \
    com.github.seratch::awscala-s3:0.8.2

should result in an error IIUC your issue.

If that's the case, open an issue in the coursier repo

Also, the latest version of the coursier CLI shouldn't trap the stacktrace, it'll be helpful if you could add it in the issue.

Jon Keatley

@jckeatley

@Quafadas I have a similar situation at work. I set this environment variable before I run amm:

JAVA_OPTS='-Xmx1G -Djavax.net.ssl.keyStore=/etc/ssl/certs/java/cacerts -Djavax.net.ssl.keyStorePassword=changeit -Djavax.net.ssl.trustStore=/etc/ssl/certs/java/cacerts -Djavax.net.ssl.trustStorePassword=changeit'

I'm running an Ubuntu system, and I put any local certificates into /usr/local/share/ca-certificates/<my-cert-dir>, then I run update-ca-certificatesas root.

Jon Keatley

@jckeatley

On my Windows machine, I run Cygwin64, and I put the local certs into /etc/pki/ca-trust/source/anchors, then run 'update-ca-trust'. I then use the Windows path for the cacerts, like this: C:/cygwin64/etc/pki/ca-trust/extracted/java/cacerts

Quafadas

@Quafadas

@alexarchambault @jckeatley Thankyou both very much - I realised my biggest problem was that when I was trying to add the cert to the keystore, I had forgotten to elevate privelges, but hadn't spotted keytool erroring out...

You put no on the right path to testability, and @jckeatley your config works great. Thanks again.

Marvin Ward Jr.

@choct155

Hello All, I'm a big fan of the project, and I'd love to use it at work. Is it possible to launch the REPL using only the ammonite jar (as opposed to the executable)?

Andy Czerwonka

@andyczerwonka

@choct155 you can probably crib that from the launch script in the distro

Li Haoyi

@lihaoyi

the executable is a jar. Search the docs for “embed”

Marvin Ward Jr.

@choct155

Thanks for the replies @andyczerwonka and @lihaoyi . Apologies as well for being unclear. I know I can list the jar as a dependency and use it within a project (we have been doing this via SBT on toy projects). I'd like to be able to launch the repl from the command line with a "java" call, but I'm running into dependency issues (for example, running Ammonite.Main depends on os-lib). In general, it is more difficult than might be obvious to get new software approved and into our organization. This actually hangs up our use of SBT for the time being, because we need to generate fat JARs and we are without sbt-assembly in the short run. (I know about the Mill project, which looks super cool. Ultimately, however, it hangs up for the same reasons in the short run.) Since the ammonite JAR is available for use, I was wondering if I was just missing some obvious way to call the repl from the command line that does not require additional dependencies.

In general, I'd love to push ammonite into our regular workflow which mostly involves writing Spark applications (hence the need for fat JARs). After using ammonite, the default Spark REPL leaves a lot to be desired.

Mateusz Błażejewski

@mblaze

Hi, I'm new to Ammonite and consider using it instead of bash but I'm also concerned about performance. Does every script execution create a new JVM? Have anybody tested how much overhead in startup time does it add compared to bash?

Olivier Mélois

@Baccata

@mblaze there is definitely an startup overhead related to the JVM. What ammonite gets you is correctness and maintainability of your scripts (as well as access to the extraordinary amount of scala/java libraries). You don't have to choose between bash and ammonite, you can decide to use one or the other depending on the complexity of the task you're trying to solve and the amount of times a day you're gonna run your scripts.

Paul S.

@pshirshov

Hi guys. Could you give me a hint if I workaround dependency convergence in ammonite somehow? My script depends on scopt v4 and seems clashes with the version shipped with ammonite. --thin doesn't help for some reason

Paul S.

@pshirshov

@here: could someone tell me if I can somehow override magic import behaviour so it would load a file with .scala extension?..

2efper

@2efPer

Does ammonite has paste mode?

jvr-ks

@jvr-ks

@2efPer Put the code inside { ... }

Tim Harper

@timcharper

Does ammonite have the equivalent of $0 (i.e. from bash SCRIPT_DIR=$(dirname "$0")) ? I'd like my script to be relatively invocable

Li Haoyi

@lihaoyi

I think you can use sourccode.File

Tim Harper

@timcharper

neat, that does it!

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