Add license check action (#36)

* Add license check action

* Add charset to editorconfig

* Update permissions

* Add F# file checking

* Code cleanup and BOM removal

* Fix accidental line duplicate

Author: stevejgordon

.editorconfig

@@ -5,6 +5,7 @@ trim_trailing_whitespace=true
 insert_final_newline=true
 
 [*]
+charset = utf-8
 indent_style = tab
 indent_size = 4
 

.github/add-license-headers.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+script_path=$(dirname $(realpath -s $0))/../
+
+function add_license () {
+    (find "$script_path" -name $1 | grep -v "/bin/" | grep -v "/obj/" )|while read fname; do
+        line=$(sed -n '2p;3q' "$fname")
+        if ! [[ "$line" == " * Licensed to Elasticsearch B.V. under one or more contributor" ]] ; then
+            # awk joins the header with the existing file, inserting a newline between them
+            awk '(NR>1 && FNR==1){print ""}1' "${script_path}.github/license-header.txt" "$fname" > "${fname}.new"
+            mv "${fname}.new" "$fname"
+        fi
+    done
+}
+
+add_license "*.cs"

.github/check-license-headers.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+# Check that source code files in this repo have the appropriate license
+# header.
+
+if [ "$TRACE" != "" ]; then
+    export PS4='${BASH_SOURCE}:${LINENO}: ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
+    set -o xtrace
+fi
+set -o errexit
+set -o pipefail
+
+TOP=$(cd "$(dirname "$0")/.." >/dev/null && pwd)
+NLINES=$(wc -l .github/license-header.txt | awk '{print $1}')
+
+function check_license_header {
+    local f
+    f=$1
+    if ! diff -a --strip-trailing-cr .github/license-header.txt <(head -$NLINES "$f") >/dev/null; then
+        echo "check-license-headers: error: '$f' does not have required license header, see 'diff -u .github/license-header.txt <(head -$NLINES $f)'"
+        return 1
+    else
+        return 0
+    fi
+}
+
+cd "$TOP"
+nErrors=0
+for f in $(git ls-files | grep '\.cs$'); do
+    if ! check_license_header $f; then
+        nErrors=$((nErrors+1))
+    fi
+done
+
+for f in $(git ls-files | grep '\.fs$'); do
+    if ! check_license_header $f; then
+        nErrors=$((nErrors+1))
+    fi
+done
+
+if [[ $nErrors -eq 0 ]]; then
+    exit 0
+else
+    exit 1
+fi

.github/license-header.txt

@@ -0,0 +1,3 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information

.github/workflows/license.yml

@@ -0,0 +1,15 @@
+name: License headers
+
+on: [pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Check license headers
+      run: |
+        ./.github/check-license-headers.sh

build/scripts/CommandLine.fs

@@ -1,3 +1,7 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
 module CommandLine
 
 open Argu

build/scripts/Paths.fs

@@ -1,3 +1,7 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
 module Paths
 
 open System

build/scripts/Program.fs

@@ -1,4 +1,8 @@
-module Program
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+module Program
 
 open Argu
 open Bullseye

build/scripts/Targets.fs

@@ -1,3 +1,7 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
 module Targets
 
 open Argu

examples/Elastic.Managed.Example/Program.cs

@@ -1,4 +1,4 @@
-// Licensed to Elasticsearch B.V under one or more agreements.
+// Licensed to Elasticsearch B.V under one or more agreements.
 // Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
 // See the LICENSE file in the project root for more information
 
@@ -14,13 +14,13 @@ public static class Program
 		public static void Main(string[] args)
 		{
 			var version = "6.3.0";
-			var esHome = Environment.ExpandEnvironmentVariables($@"%LOCALAPPDATA%\ElasticManaged\{version}\elasticsearch-{version}");
+			var esHome =
+				Environment.ExpandEnvironmentVariables(
+					$@"%LOCALAPPDATA%\ElasticManaged\{version}\elasticsearch-{version}");
 
-			var clusterConfiguration = new ClusterConfiguration(version, esHome, numberOfNodes: 2);
+			var clusterConfiguration = new ClusterConfiguration(version, esHome, 2);
 			using (var cluster = new ElasticsearchCluster(clusterConfiguration))
-			{
 				cluster.Start(new ConsoleLineWriter(), TimeSpan.FromMinutes(2));
-			}
 
 			Console.WriteLine("Program ended");
 		}