Perform direct asset name comparison

github_test.go

@@ -25,7 +25,7 @@ func TestGetListOfReleasesFromGitHubRepo(t *testing.T) {
 		testInst         GitHubInstance
 	}{
 		// Test on a public repo whose sole purpose is to be a test fixture for this tool
-		{"https://github.com/gruntwork-io/fetch-test-public", "v0.0.1", "v0.0.3", 3, "", testInst},
+		{"https://github.com/gruntwork-io/fetch-test-public", "v0.0.1", "v0.0.4", 4, "", testInst},
 
 		// Private repo equivalent
 		{"https://github.com/gruntwork-io/fetch-test-private", "v0.0.2", "v0.0.2", 1, os.Getenv("GITHUB_OAUTH_TOKEN"), testInst},

main.go

@@ -455,6 +455,11 @@ func findAssetsInRelease(assetRegex string, release GitHubReleaseApiResponse) ([
 		if matched {
 			assetRef := asset
 			matches = append(matches, &assetRef)
+		} else if asset.Name == assetRegex {
+			// Sometimes the actual asset name contains regex symbols that could mess up matching.
+			// Perform a direct comparison as a last resort.
+			assetRef := asset
+			matches = append(matches, &assetRef)
 		}
 	}
 

main_test.go

@@ -42,6 +42,41 @@ func TestDownloadReleaseAssets(t *testing.T) {
 	}
 }
 
+func TestDownloadReleaseAssetsWithRegexCharacters(t *testing.T) {
+	tmpDir := mkTempDir(t)
+	logger := GetProjectLogger()
+	testInst := GitHubInstance{
+		BaseUrl: "github.com",
+		ApiUrl:  "api.github.com",
+	}
+
+	const githubRepoUrl = "https://github.com/gruntwork-io/fetch-test-public"
+	const releaseAsset = "hello+world.txt"
+	const assetVersion = "v0.0.4"
+
+	githubRepo, err := ParseUrlIntoGitHubRepo(githubRepoUrl, "", testInst)
+	if err != nil {
+		t.Fatalf("Failed to parse sample release asset GitHub URL into Fetch GitHubRepo struct: %s", err)
+	}
+
+	assetPaths, fetchErr := downloadReleaseAssets(logger, releaseAsset, tmpDir, githubRepo, assetVersion, false)
+	if fetchErr != nil {
+		t.Fatalf("Failed to download release asset: %s", fetchErr)
+	}
+
+	if len(assetPaths) != 1 {
+		t.Fatalf("Expected to download 1 assets, not %d", len(assetPaths))
+	}
+
+	assetPath := assetPaths[0]
+
+	if _, err := os.Stat(assetPath); os.IsNotExist(err) {
+		t.Fatalf("Downloaded file should exist at %s", assetPath)
+	} else {
+		fmt.Printf("Verified the downloaded asset exists at %s\n", assetPath)
+	}
+}
+
 func TestInvalidReleaseAssetsRegex(t *testing.T) {
 	tmpDir := mkTempDir(t)
 	logger := GetProjectLogger()