Script that directly comments errors to the github pull request.

scripts/check_style.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+. scripts/report_errors.sh
+
 (
 REPO_ROOT="$(dirname "$0")"/..
 cd $REPO_ROOT
@@ -8,8 +10,8 @@ WHITESPACE=$(git grep -n -I -E "^.*[[:space:]]+$" | grep -v "test/libsolidity/AS
 
 if [[ "$WHITESPACE" != "" ]]
 then
-	echo "Error: Trailing whitespace found:" >&2
+	echo "Error: Trailing whitespace found:" | tee -a $ERROR_LOG
-	echo "$WHITESPACE" >&2
+	echo "$WHITESPACE" | tee -a $ERROR_LOG
 	exit 1
 fi
 
@@ -22,8 +24,8 @@ git grep -nIE "\<if\>\s*\(.*\)\s*\{\s*$" -- '*.h' '*.cpp'
 
 if [[ "$FORMATERROR" != "" ]]
 then
-	echo "Error: Format error for if/for:" >&2
+	echo "Error: Format error for if/for:" | tee -a $ERROR_LOG
-	echo "$FORMATERROR" >&2
+	echo "$FORMATERROR" | tee -a $ERROR_LOG
 	exit 1
 fi
 )

scripts/report_errors.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+
+export ERROR_LOG="/tmp/error.log"
+
+function report_error_to_github
+{
+    if [ $? -eq 0 ]
+    then
+        exit 0
+    fi
+
+    if [ -z $CIRCLE_PR_NUMBER ]
+    then
+        CIRCLE_PR_NUMBER="${CIRCLE_PULL_REQUEST//[^0-9]/}"
+    fi
+
+    ERROR_MSG=$(cat $ERROR_LOG)
+
+    echo $ERROR_MSG
+
+    if [ ! -z $CI ]
+    then
+        echo "posting error message to github"
+        post_error_to_github
+    fi
+}
+
+function post_error_to_github
+{
+    if [ -z $CIRCLE_PR_NUMBER ]
+    then
+        CIRCLE_PR_NUMBER="${CIRCLE_PULL_REQUEST//[^0-9]/}"
+    fi
+
+    GITHUB_API_URL="https://api.github.com/repos/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME/issues/$CIRCLE_PR_NUMBER/comments"
+
+    ESCAPED_ERROR_MSG=$(cat -e $ERROR_LOG | sed 's/\\/\\\\/g' | sed 's/"/\\\"/g')
+
+    FORMATTED_ERROR_MSG=$(echo $ESCAPED_ERROR_MSG | sed 's/\$/\\n/g' | tr -d '\n')
+
+    curl --request POST \
+      --url $GITHUB_API_URL \
+      --header 'accept: application/vnd.github.v3+json' \
+      --header 'content-type: application/json' \
+      -u stackenbotten:$GITHUB_ACCESS_TOKEN \
+      --data "{\"body\": \"There was an error when running \`$CIRCLE_JOB\` for commit \`$CIRCLE_SHA1\`:\n\`\`\`\n$FORMATTED_ERROR_MSG\n\`\`\`\nPlease check that your changes are working as intended.\"}"
+}
+
+trap report_error_to_github EXIT