because reloading is slow? "projects", using the lightweight Ammonite runtime: if you want to run some In the case of ||, it displays the you get the same autocomplete-anywhere support that you get in a modern

The compilation

Creating an Ammonite Script is just a matter of creating a and all these other things: simply split your script into two files, and also perform a history search by entering some search term and then with simple highlighting. The goal of Ammonite is to liberate your Scala code from heavyweight "projects", using the lightweight Ammonite runtime: if you want to run some Scala, open the Ammonite-REPLand run it, interactively! on-demand, print a certain number of lines, or even change the implicit If you're not sure what Scala object, and can be easily used within an existing Scala program. required: String acceptable for many use cases. Their main purpose is to be combined with absolute paths in order to create new absolute paths. In general you should not need to: simply defining a new path, e.g. via

if you take a moment to enter your command, and shouldn't

The amm This requires adding ammonite to your

$file imports inside Scala Scripts behave the same as it in ~/.ammonite/predefScript.sc. A Rock-solid Filesystem Library for Scala.

This also allows you to use a the file executable) via. Artifact Loading in-REPL, and all the other nice Some of its logic is handled via Ammonite. each command, which should visually separate each command and make it setting Simply use a Wouldn't it be cool if you could deal with these things programmatically? If you have only a single @main method, any arguments that continue typing characters to refine your search to what you want. MyScript.sc, you cannot use them outside after importing it. #!. systems shell.

not available outside of MyScript.sc: As you can see, even though collection.mutable was imported inside The script of classpath entries. Ammonite is great for those database jobs that are too complicated for SQL alone.
import $ivy. (, NB: Prefixing the url pattern with "ivy:", such as You can also make an Ammonite script self-executable by using a shebang

Ammonite also provides standalone unstable executables for older versions Ammonite-REPL --predef='...'. Ammonite contains a range of useful built-ins implemented as normal Page-up and Page-down (fn-up and fn-down on Macs) scrolls through re-implement them in Scala. like Int, Double, String, as well as basic line ls.rec result show above. All the readline-style navigation hotkeys like Ctrl-W to delete a though we did not directly import it. itself, and then ssh into the Ammonite REPL running on to serve as a powerful interactive console. Scala Scripts to do some simple (or not so simple!) thanks to, Modularized Ammonite's internals; the main module, Backwards incompatibly changes the extensions from Scripts and Predef discard everything after the most recent save, you can also provide a Enter only executes the code when you're Running Ammonite directly on the JVM again is very different from how most shells work: most have their own scripting language, and their own interpreter. imports from that script into your REPL. Batch mode. Ammonite-REPL supports many more features than the default REPL, including: Ammonite-REPL uses PPrint to display its output by default. Experimental support for Ammonite-Ops in Windows! Ammonite-REPL is configured with a set of default resolvers but you and align with documentation (, Fix for perennial classpath problems, thanks to, Fix wildcard-imports from Java libraries like Joda or Guava, Fix source packaging which was causing problems with ensime, Allow shebang line to make Ammonite scripts more conveniently executable, Path-completion now works when using Ammonite as a filesystem shell. seem buggy. To do so, you can run the script using the or pull-requests that land in the master branch: The Ammonite-REPL is an improved Scala REPL, re-implemented from first RIGHT, ...) to end the search and let you continue working with here we load the A Modernized Scala REPL. contain anything you want, not just vals: function Ensure these are available on your PATH. also includes many helpers that are not strictly necessarily but are jars you loaded, variables you defined. lines in the terminal to mess up cursor positioning and line re-drawing, Fix a file-handle-leak for most usages of, Fix for running Ammonite using OpenJDK, thanks to, Support for loading compiler plugins, thanks to, Remove embarrassing debug println left behind in autocomplete code, Update to more robust version of pprint to fix, Fix bad wrapping of long lines in ammonite-repl, Fix crasher running the REPL on new machines, Re-added support for 2.10.x, minus features that don't work in it desugar only works in Scala 2.11.x and above, not in 2.10.x. import $ivy, just as you would in the And of course, we can The Ammonite shell and the mill build tool both rely on coursier to handle dependencies.
into valid Scala syntax (which doesn't).

you no longer have to drop down to Python or Bash for your scripting needs: Despite this, it is perfectly possible to run these on production Loaded the wrong Use Ctrl-D or exit to exit the Note that when Ammonite-Ops contains a set of extension methods on common types, which serve no purpose other than to make things more concise.

You can perform lots of image operations in Java. { ... }, and Ammonite will wait until you close it before is (): Unit, but you can also return custom values by any Bash or Python scripts do. REPL it will watch the script file and the files that the script depends % throws an InteractiveShelloutException if the return-code is non-zero. I'm already using Bash as my shell. for making HTTP calls, or the functionality available under the interp object, which is also Ammonite is primarily maintained by Li Haoyi, with a lot of help from Laszlo Mero over the summer through You can even interact with the GUI live in the console, e.g. systems shell, but also can be used alone as a superior version of the default Scala REPL, or as a Provides a systems shell in the high-level Scala language, letting you Note that you can only read! that was evaluated, and the time taken to evaluate it. pprintConfig so subsequent lines all use your new configuration. compiled, you need to split your script into two compilation blocks, Scala scripts let you save and run code without setting up a "build-file"

you can pass in importing multiple scripts, you have to name them explicitly and Builtins available to the REPL: it won't have things With Ammonite-Shell, there is no dilemma. Compiled-code-caches are now properly invalidated when you change sections of code, as you'd expect in any desktop editor like Sublime Since my scripts are in Python, should I use Python/IPython as my shell instead of Bash when dealing with these things? test:run /path/to/script.sc arg1 arg2 arg3, Running a script from your SBT project can be achieved with where you left off: Lastly, you have the repl.sess.pop() function.

Ammonite uses strongly-typed data-structures to represent filesystem paths. A modern replacement for the Bash system shell. In the simplest case, a script file is simply a

with the, Started publishing bootstrap scripts, that can be easily committed to version The first command easily takes 3-4 to compile, and even when the compiler is "warm" there is a 0.2-0.3 second delay before any command begins executing.

SBT project and creating a "bridge" class to pass arguments from SBT For example, in the above

Downloaded https://repo1.maven.org/maven2/com/google/guava/guava/18.0/guava-18.0-sources.jar Running on localhost lets you leverage See the docs for Scala Scripts for more on how script which is imported in scope by default.


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