fix an AutoTrace bug that fails to deal with file types other than .m or .mlx. Fixes #196.

Author: duncanpo

auto-instrumentation/+opentelemetry/+autoinstrument/AutoTrace.m

@@ -71,14 +71,19 @@
                 if isdeployed
                     % matlab.codetools.requiredFilesAndProducts is not
                     % deployable. Instead instrument all files under CTFROOT
-                    fileinfo = dir(fullfile(ctfroot, "**", "*.m"));
+                    fileinfo = [reshape(dir(fullfile(ctfroot, "**", "*.m")), [], 1); ...
+                        reshape(dir(fullfile(ctfroot, "**", "*.mlx")), [], 1)];
                     files = fullfile(string({fileinfo.folder}), string({fileinfo.name}));
 
                     % filter out internal files in the toolbox directory
                     files = files(~startsWith(files, fullfile(ctfroot, "toolbox")));
                 else
                     %#exclude matlab.codetools.requiredFilesAndProducts
                     files = string(matlab.codetools.requiredFilesAndProducts(startfunname));
+                    
+                    % keep only .m and .mlx files. Filter out everything else
+                    [~,~,fext] = fileparts(files);
+                    files = files(ismember(fext, [".m" ".mlx"]));
                 end
             else
                 % only include the input file, not its dependencies

test/autotrace_examples/matfile_example/matfile_example.m

@@ -0,0 +1,7 @@
+function y = matfile_example
+% Example code for testing auto instrumentation, which loads a .mat file
+
+% Copyright 2025 The MathWorks, Inc.
+
+load("mymagic", "x");
+y = sum(x);

test/autotrace_examples/matfile_example/mymagic.mat

@@ -256,6 +256,28 @@ function testNonFileOptions(testCase)
             end
         end
 
+        function testUnsupportedDependentFiles(testCase)
+            % testUnsupportedDependentFiles: Check that File dependencies that are not
+            % .m or .mlx files are ignored. For example, .mat file.
+           
+            % Add example folders to the path
+            examplefolder = fullfile(fileparts(mfilename('fullpath')), "autotrace_examples", "matfile_example");
+            testCase.applyFixture(matlab.unittest.fixtures.PathFixture(examplefolder));
+
+            % set up AutoTrace
+            at = opentelemetry.autoinstrument.AutoTrace(@matfile_example);
+
+            % run the example
+            [~] = beginTrace(at);
+
+            % perform test comparisons
+            results = readJsonResults(testCase);
+            
+            % should only return 1 span
+            verifyNumElements(testCase, results, 1);
+            verifyEqual(testCase, string(results{1}.resourceSpans.scopeSpans.spans.name), "matfile_example");
+        end
+
         function testError(testCase)
             % testError: handling error situation