Add containerd support (#1793)

* [wip] add containerd UI handlers

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* Add containerd support

- Add UI handlers (done by @wagoodman)
- Add containerd types and wrappers (done by @wagoodman)
- Add flag for specifying containerd address

Closes #201

Signed-off-by: Shane Dell <shanedell100@gmail.com>

* Fix lint

Signed-off-by: Shane Dell <shanedell100@gmail.com>

* add containerd ui handler

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* add containerd scheme to readme

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* add test for scheme detection

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

---------

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Shane Dell <shanedell100@gmail.com>
Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>
Co-authored-by: Alex Goodman <alex.goodman@anchore.com>
Co-authored-by: Alex Goodman <wagoodman@users.noreply.github.com>

syft/source/detection.go

@@ -199,6 +199,8 @@ func parseDefaultImageSource(defaultImageSource string) image.Source {
 		return image.DockerDaemonSource
 	case "podman":
 		return image.PodmanDaemonSource
+	case "containerd":
+		return image.ContainerdDaemonSource
 	default:
 		return image.UnknownSource
 	}

syft/source/detection_test.go

@@ -247,6 +247,26 @@ func Test_Detect(t *testing.T) {
 			expectedScheme:   unknownType,
 			expectedLocation: "",
 		},
+		{
+			name:      "podman-image",
+			userInput: "containerd:anchore/syft",
+			detection: detectorResult{
+				src: image.PodmanDaemonSource,
+				ref: "anchore/syft",
+			},
+			expectedScheme:   containerImageType,
+			expectedLocation: "anchore/syft",
+		},
+		{
+			name:      "containerd-image",
+			userInput: "containerd:anchore/syft",
+			detection: detectorResult{
+				src: image.ContainerdDaemonSource,
+				ref: "anchore/syft",
+			},
+			expectedScheme:   containerImageType,
+			expectedLocation: "anchore/syft",
+		},
 	}
 	for _, test := range testCases {
 		t.Run(test.name, func(t *testing.T) {