cljfmt-graalvm

@NOTE: this is a clone of gitlab.com/konrad.mrozek/cljfmt-graalvm/ lightly modified to format input from stdin or a file. I've also built native images and attached them as a release for Linux and Mac for convenience.

To use, just download one of the binaries, chmod +x it and put it somewhere on your path. For the ~~lazy~~efficient, pasting the snippet below into your term should get the job done:
wget -O ~/cljfmt "https://github.com/nikvdp/cljfmt/releases/download/v0.6.1/cljfmt.$(uname)"
chmod +x ~/cljfmt
sudo mv ~/cljfmt /usr/local/bin

A Clojure code formatter using cljfmt built with graalvm.

Usage

Format a file in place:

./cljfmt source-file.clj

Format from stdin:

cat some-file.clj | ./cljfmt

Build

For linux, a binary may be downloaded directly from Gitlab. To build the binary yourself, here are some instructions.

Install lein
Download GraalVM for your machine. You will need the EE version if you're using MacOS.

Set JAVA_HOME to the GraalVM home directory, e.g.

export JAVA_HOME=~/Downloads/graalvm-1.0.0-rc1/Contents/Home

Set the PATH to use GraalVM's binaries, e.g.

export PATH=$PATH:~/Downloads/graalvm-1.0.0-rc1/Contents/Home/bin

Create the uberjar:
```
lein uberjar
```

Use GraalVM's assisted configuration to generate reflection files:

mkdir -p ./META-INF/native-image 

# with stdin
cat project.clj | java -agentlib:native-image-agent=config-output-dir=./META-INF/native-image -jar target/cljfmt-graalvm-0.1.0-SNAPSHOT-standalone.jar

# with cmdline arg, now using config-merge-dir to add any extra methods
java -agentlib:native-image-agent=config-merge-dir=./META-INF/native-image -jar target/cljfmt-graalvm-0.1.0-SNAPSHOT-standalone.jar ./project.clj

Finally, create the binary adding the GraalVM assisted configuration output to the classpath:

native-image \
    -jar target/cljfmt-graalvm-0.1.0-SNAPSHOT-standalone.jar \
    -H:Name="cljfmt" \
    -cp ./META-INF/native-image  \
    --no-fallback \
    --report-unsupported-elements-at-runtime \
    --allow-incomplete-classpath \
    -H:+InlineBeforeAnalysis \
    -H:ConfigurationFileDirectories=graalvm \
    --initialize-at-build-time

Integrate with Emacs

Place the cljfmt binary on your PATH. To execute it on a Clojure file in Emacs on save, add this to your init.el:

(defun cljfmt ()
  (when (or (eq major-mode 'clojure-mode)
            (eq major-mode 'clojurescript-mode))
    (shell-command-to-string (format "cljfmt %s" buffer-file-name))
    (revert-buffer :ignore-auto :noconfirm)))

(add-hook 'after-save-hook #'cljfmt)

License

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.