Ocp indent (#17)

* Added pre-commit hook for ocp-indent

* Test for one file

.hooks/ocp-indent.sh

+#!/bin/bash
+pat=".*\.ml(i|l|y)?$"
+if [[ $1 =~ $pat ]]; 
+then
+    s1=$(cat $1)
+    s2=$(ocp-indent $1)
+    if [ "$s1" == "$s2" ]
+    then
+        exit 0
+    else
+        echo "$1: ocp-indent"
+        exit 1
+    fi
+fi
+exit 0

.ocp-indent

+JaneStreet
+match_clause = 4
\ No newline at end of file

.pre-commit-config.yaml

@@ -35,3 +35,11 @@ repos:
     rev: v0.1.0
     hooks:
       - id: dockerfilelint
+
+-   repo: local
+    hooks:
+      - id: ocp-indent
+        name: ocp-indent
+        language: system
+        verbose: true
+        entry: .hooks/ocp-indent.sh