Add support for loading test results from artifacts

src/input-providers/local-file-provider.ts

@@ -0,0 +1,25 @@
+import * as fs from 'fs'
+import glob from 'fast-glob'
+import {FileContent, InputProvider, ReportInput} from './input-provider'
+import {listFiles} from '../utils/git'
+
+export class LocalFileProvider implements InputProvider {
+  constructor(readonly name: string, readonly pattern: string[]) {}
+
+  async load(): Promise<ReportInput> {
+    const result: FileContent[] = []
+    for (const pat of this.pattern) {
+      const paths = await glob(pat, {dot: true})
+      for (const file of paths) {
+        const content = await fs.promises.readFile(file, {encoding: 'utf8'})
+        result.push({file, content})
+      }
+    }
+
+    return {[this.name]: result}
+  }
+
+  async listTrackedFiles(): Promise<string[]> {
+    return listFiles()
+  }
+}