Add git hooks

git/hooks/pre-commit.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+status=0
+
+PRECIOUS=$(which precious)
+if [[ -z $PRECIOUS ]]; then
+    PRECIOUS=./bin/precious
+fi
+
+if ! "$PRECIOUS" lint -s; then
+    status=$((status + 1))
+fi
+
+exit $status

git/setup.pl

@@ -0,0 +1,27 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+
+use Cwd qw( abs_path );
+
+symlink_hook('pre-commit');
+
+sub symlink_hook {
+    my $hook = shift;
+
+    my $dot  = ".git/hooks/$hook";
+    my $file = "git/hooks/$hook.sh";
+    my $link = "../../$file";
+
+    if ( -e $dot ) {
+        if ( -l $dot ) {
+            return if readlink $dot eq $link;
+        }
+        warn "You already have a hook at $dot!\n";
+        return;
+    }
+
+    symlink $link, $dot
+        or die "Could not link $dot => $link: $!";
+}