Add eslint drone test

Signed-off-by: Julius Härtl <jus@bitgrid.net>

.drone.yml

@@ -150,6 +150,13 @@ pipeline:
     when:
       matrix:
         TESTS: integration
+  eslint:
+    image: nextcloudci/eslint:eslint-1
+    commands:
+      - ./run-eslint.sh
+    when:
+      matrix:
+        TESTS: eslint
   jsbuild:
     image: mhart/alpine-node:6.8.0
     commands:
@@ -169,6 +176,7 @@ matrix:
     - TESTS: php5.6
     - TESTS: php7.0
     - TESTS: php7.1
+    - TESTS: eslint
     - TESTS: jsbuild
     - TESTS: integration
 

Makefile

@@ -62,6 +62,7 @@ appstore: clean-build build
 	--exclude="../$(app_name)/protractor\.*" \
 	--exclude="../$(app_name)/.*" \
 	--exclude="../$(app_name)/*.lock" \
+	--exclude="../$(app_name)/run-eslint.sh" \
 	--exclude="../$(app_name)/js/.*" \
 	--exclude="../$(app_name)/vendor" \
 	--exclude-vcs \

run-eslint.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+set -e
+
+ESLINT=$(which eslint || true)
+if [ -z "$ESLINT" ]; then
+    echo "Can't find command \"eslint\" in $PATH"
+    exit 1
+fi
+
+echo Checking scripts with $ESLINT ...
+find -name "*.js" -print0 | xargs -0 $ESLINT