Add exception handling for special case files like Dockerfile and `…

…Jenkinsfile` (#2410)

collector/processSingleFile/index.js

@@ -38,7 +38,7 @@ async function processSingleFile(targetFilename, options = {}) {
     };
 
   const fileExtension = path.extname(fullFilePath).toLowerCase();
-  if (!fileExtension) {
+  if (fullFilePath.includes(".") && !fileExtension) {
     return {
       success: false,
       reason: `No file extension found. This file cannot be processed.`,

collector/utils/files/mime.js

@@ -1,5 +1,5 @@
 const MimeLib = require("mime");
-
+const path = require("path");
 class MimeDetector {
   nonTextTypes = ["multipart", "image", "model", "audio", "video"];
   badMimes = [
@@ -44,8 +44,26 @@ class MimeDetector {
     );
   }
 
+  // These are file types that are not detected by the mime library and need to be processed as text files.
+  // You should only add file types that are not detected by the mime library, are parsable as text, and are files
+  // with no extension. Otherwise, their extension should be added to the overrides array.
+  #specialTextFileTypes = ["dockerfile", "jenkinsfile"];
+
+  /**
+   * Returns the MIME type of the file. If the file has no extension found, it will be processed as a text file.
+   * @param {string} filepath
+   * @returns {string}
+   */
   getType(filepath) {
-    return this.lib.getType(filepath);
+    const parsedMime = this.lib.getType(filepath);
+    if (!!parsedMime) return parsedMime;
+
+    // If the mime could not be parsed, it could be a special file type like Dockerfile or Jenkinsfile
+    // which we can reliably process as text files.
+    const baseName = path.basename(filepath)?.toLowerCase();
+    if (this.#specialTextFileTypes.includes(baseName)) return "text/plain";
+
+    return null;
   }
 }