initial commit

.gitignore

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+/tmp/
+/.vscode/

Dockerfile

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+FROM ruby:2.6
+
+LABEL com.github.actions.name="Rubocop Linter"
+LABEL com.github.actions.description="Lint your Ruby code"
+LABEL com.github.actions.icon="code"
+LABEL com.github.actions.color="red"
+
+LABEL maintainer="Andrew Mason <andrewmcodes@protonmail.com>"
+
+COPY lib /action/lib
+ENTRYPOINT ["/action/lib/entrypoint.sh"]

LICENSE

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+MIT License
+
+Copyright (c) 2019 Andrew Mason
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Rubocop GitHub Action
+
+TODO

lib/action.json

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+{
+  "repository": {
+    "owner": {
+      "login": "andrewmcodes"
+    }
+    ,"name": "rubocop-linter"
+  }
+}

lib/entrypoint.sh

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+#!/bin/sh
+
+set -e
+
+gem install rubocop rubocop-performance rubocop-rails
+
+ruby /action/lib/index.rb

lib/index.rb

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+require 'net/http'
+require 'json'
+require 'time'
+
+@GITHUB_SHA = ENV["GITHUB_SHA"]
+@GITHUB_EVENT_PATH = ENV["GITHUB_EVENT_PATH"]
+@GITHUB_TOKEN = ENV["GITHUB_TOKEN"]
+@GITHUB_WORKSPACE = ENV["GITHUB_WORKSPACE"]
+
+@event = JSON.parse(File.read(ENV["GITHUB_EVENT_PATH"]))
+@repository = @event["repository"]
+@owner = @repository["owner"]["login"]
+@repo = @repository["name"]
+
+@check_name = "Rubocop"
+
+@headers = {
+  "Content-Type": 'application/json',
+  "Accept": 'application/vnd.github.antiope-preview+json',
+  "Authorization": "Bearer #{@GITHUB_TOKEN}",
+  "User-Agent": 'rubocop-action'
+}
+
+def create_check
+  body = {
+    "name" => @check_name,
+    "head_sha" => @GITHUB_SHA,
+    "status" => "in_progress",
+    "started_at" => Time.now.iso8601
+  }
+
+  http = Net::HTTP.new('api.github.com', 443)
+  http.use_ssl = true
+  path = "/repos/#{@owner}/#{@repo}/check-runs"
+
+  resp = http.post(path, body.to_json, @headers)
+
+  if resp.code.to_i >= 300
+    raise resp.message
+  end
+
+  data = JSON.parse(resp.body)
+  return data["id"]
+end
+
+def update_check(id, conclusion, output)
+  body = {
+    "name" => @check_name,
+    "head_sha" => @GITHUB_SHA,
+    "status" => 'completed',
+    "completed_at" => Time.now.iso8601,
+    "conclusion" => conclusion,
+    "output" => output
+  }
+
+  http = Net::HTTP.new('api.github.com', 443)
+  http.use_ssl = true
+  path = "/repos/#{@owner}/#{@repo}/check-runs/#{id}"
+
+  resp = http.patch(path, body.to_json, @headers)
+
+  if resp.code.to_i >= 300
+    raise resp.message
+  end
+end
+
+@annotation_levels = {
+  "refactor" => 'failure',
+  "convention" => 'failure',
+  "warning" => 'warning',
+  "error" => 'failure',
+  "fatal" => 'failure'
+}
+
+def run_rubocop
+  annotations = []
+  errors = nil
+  Dir.chdir(@GITHUB_WORKSPACE) {
+    errors = JSON.parse(`rubocop --format json`)
+  }
+  conclusion = "success"
+  count = 0
+
+  errors["files"].each do |file|
+    path = file["path"]
+    offenses = file["offenses"]
+
+    offenses.each do |offense|
+      severity = offense["severity"]
+      message = offense["message"]
+      location = offense["location"]
+      annotation_level = @annotation_levels[severity]
+      count = count + 1
+
+      if annotation_level == "failure"
+        conclusion = "failure"
+      end
+
+      annotations.push({
+                         "path" => path,
+                         "start_line" => location["start_line"],
+                         "end_line" => location["start_line"],
+                         "annotation_level": annotation_level,
+                         "message" => message
+                       })
+    end
+  end
+
+  output = {
+    "title": @check_name,
+    "summary": "#{count} offense(s) found",
+    "annotations" => annotations
+  }
+
+  return { "output" => output, "conclusion" => conclusion }
+end
+
+def run
+  id = create_check()
+  begin
+    results = run_rubocop()
+    conclusion = results["conclusion"]
+    output = results["output"]
+
+    update_check(id, conclusion, output)
+
+    fail if conclusion == "failure"
+  rescue
+    update_check(id, "failure", nil)
+    fail
+  end
+end
+
+run()