Add ktlint (#97)

* feat: add ktlint

* Apply suggestions from code review

Co-authored-by: Radon Rosborough <radon.neon@gmail.com>

5 files changed, 20 insertions, 0 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8694fb4..0f601ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@ The format is based on [Keep a Changelog].
 * [dart-format](https://dart.dev/tools/dart-format) for Dart ([#89]).
 * [phpcs](https://github.com/squizlabs/PHP_CodeSniffer) for PHP
   ([#87]).
+* [ktlint](https://github.com/pinterest/ktlint) for Kotlin ([#95]).
 
 ### Features
 * Support remote files and buffers that were opened through TRAMP
diff --git a/apheleia.el b/apheleia.el
index 8dc3696..c71121c 100644
--- a/apheleia.el
+++ b/apheleia.el
@@ -927,6 +927,7 @@ being run, for diagnostic purposes."
     (gofmt . ("gofmt"))
     (google-java-format . ("google-java-format" "-"))
     (isort . ("isort" "-"))
+    (ktlint . ("ktlint" "--stdin" "-F"))
     (latexindent . ("latexindent" "--logfile=/dev/null"))
     (mix-format . ("mix" "format" "-"))
     (ocamlformat . ("ocamlformat" "-" "--name" filepath
@@ -1059,6 +1060,7 @@ function: %s" command)))
     (js3-mode . prettier)
     (js-mode . prettier)
     (json-mode . prettier)
+    (kotlin-mode . ktlint)
     (latex-mode . latexindent)
     (LaTeX-mode . latexindent)
     (python-mode . black)
diff --git a/test/formatters/installers/ktlint.bash b/test/formatters/installers/ktlint.bash
new file mode 100644
index 0000000..347a816
--- /dev/null
+++ b/test/formatters/installers/ktlint.bash
@@ -0,0 +1,4 @@
+ver="$(latest_release pinterest/ktlint)"
+apt-get install -y default-jre
+wget "https://github.com/pinterest/ktlint/releases/download/${ver}/ktlint" -O /usr/local/bin/ktlint
+chmod +x /usr/local/bin/ktlint
diff --git a/test/formatters/samplecode/ktlint/in.kt b/test/formatters/samplecode/ktlint/in.kt
new file mode 100644
index 0000000..deacc25
--- /dev/null
+++ b/test/formatters/samplecode/ktlint/in.kt
@@ -0,0 +1,8 @@
+class Test
+
+{
+fun test(  v: String )
+{
+ println(v)
+}
+}
diff --git a/test/formatters/samplecode/ktlint/out.kt b/test/formatters/samplecode/ktlint/out.kt
new file mode 100644
index 0000000..c1838fb
--- /dev/null
+++ b/test/formatters/samplecode/ktlint/out.kt
@@ -0,0 +1,5 @@
+class Test {
+    fun test(v: String) {
+        println(v)
+    }
+}