Add ESLint formatter for GHA annotations

1 files changed, 14 insertions, 0 deletions

diff --git a/annotations_formatter.js b/annotations_formatter.js
new file mode 100644
index 0000000..b3a421d
--- /dev/null
+++ b/annotations_formatter.js
@@ -0,0 +1,14 @@
+module.exports = function (results) {
+    let output = "";
+
+    for (const file of results.filter(r => r.messages.length > 0)) {
+        for (const message of file.messages) {
+            const path = file.filePath.substr(process.cwd().length + 1);
+            const severity = message.fatal || message.severity === 2 ? "error" : "warning";
+            const text = `[ESLint] ${message.ruleId}: ${message.message}`;
+            output += `::${severity} file=${path},line=${message.line},col=${message.column}::${text}\n`;
+        }
+    }
+
+    return output;
+};