test(travis): add Review comments integration (#117)

Author: azu

.travis.yml

@@ -3,6 +3,8 @@ language: node_js
 node_js: "stable"
 after_success:
   - npm run travis:coverage
+after_failure:
+  - sh .travis/review-textlint.sh
 cache:
   directories:
     - node_modules

.travis/review-textlint.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+if [ "$CI_PULL_REQUEST" == false ] || [ -z "$CI_PULL_REQUEST" ]; then
+  echo 'not pull request.'
+  exit 0
+fi
+
+gem install --no-document checkstyle_filter-git saddler saddler-reporter-github
+
+# Diff Target Branch
+# diff HEAD...target
+# http://stackoverflow.com/questions/3161204/find-the-parent-branch-of-a-git-branch
+# http://qiita.com/upinetree/items/0b74b08b64442f0a89b9
+diffBranchName=$(git show-branch | grep '*' | grep -v "$(git rev-parse --abbrev-ref HEAD)" | head -1 | awk -F'[]~^[]' '{print $2}')
+# 変更行のみを対象にする
+git diff --name-only --diff-filter=ACMR ${diffBranchName} \
+| grep -a '*.md$' \
+| xargs $(npm bin)/textlint -f checkstyle \
+| checkstyle_filter-git diff ${diffBranchName} \
+| saddler report \
+    --require saddler/reporter/github \
+    --reporter Saddler::Reporter::Github::PullRequestReviewComment