fix dist upgrade statement (#43)

pkg/assessor/manifest/manifest.go

@@ -154,14 +154,14 @@ func assessHistory(index int, cmd types.History) []*types.Assessment {
 		})
 	}
 
-	if strings.Contains(cmd.CreatedBy, "upgrade") {
+	if useDistUpgrade(cmdSlices) {
 		assesses = append(assesses, &types.Assessment{
 			Type:     types.AvoidDistUpgrade,
 			Filename: "docker config",
 			Desc:     fmt.Sprintf("Avoid upgrade in container : %s", cmd.CreatedBy),
 		})
 	}
-	if strings.Contains(cmd.CreatedBy, "sudo") {
+	if useSudo(cmdSlices) {
 		assesses = append(assesses, &types.Assessment{
 			Type:     types.AvoidSudo,
 			Filename: "docker config",
@@ -172,6 +172,28 @@ func assessHistory(index int, cmd types.History) []*types.Assessment {
 	return assesses
 }
 
+func useSudo(cmdSlices map[int][]string) bool {
+	for _, cmdSlice := range cmdSlices {
+		if containsAll(cmdSlice, []string{"sudo"}) {
+			return true
+		}
+	}
+	return false
+
+}
+
+func useDistUpgrade(cmdSlices map[int][]string) bool {
+	for _, cmdSlice := range cmdSlices {
+		if containsThreshold(cmdSlice, []string{"apt-get", "apt", "apk", "dist-upgrade"}, 2) {
+			return true
+		}
+		if containsThreshold(cmdSlice, []string{"apt-get", "apt", "apk", "upgrade"}, 2) {
+			return true
+		}
+	}
+	return false
+}
+
 func useADDstatement(cmdSlices map[int][]string) bool {
 	for _, cmdSlice := range cmdSlices {
 		if containsAll(cmdSlice, []string{"ADD", "in"}) {

pkg/assessor/manifest/manifest_test.go

@@ -332,6 +332,42 @@ func TestAddStatement(t *testing.T) {
 	}
 }
 
+func TestUseDistUpgrade(t *testing.T) {
+	var tests = map[string]struct {
+		cmdSlices map[int][]string
+		expected  bool
+	}{
+		"UseUpgrade": {
+			cmdSlices: map[int][]string{
+				0: {
+					"apt-get", "upgrade",
+				},
+			},
+			expected: true,
+		},
+		"UseAptUpgrade": {
+			cmdSlices: map[int][]string{
+				0: {"apt", "upgrade"},
+				1: {"addgroup", "--system", "--gid", "101", "nginx"},
+			},
+			expected: true,
+		},
+		"NoAptUpgrade": {
+			cmdSlices: map[int][]string{
+				0: {"pip", "install", "--upgrade", "pip", "setuptools"},
+				1: {"pip", "install", "upgrade", "pip", "setuptools"},
+			},
+			expected: false,
+		},
+	}
+	for testname, v := range tests {
+		actual := useDistUpgrade(v.cmdSlices)
+		if actual != v.expected {
+			t.Errorf("%s want: %t, got %t", testname, v.expected, actual)
+		}
+	}
+}
+
 func loadImageFromFile(path string) (config types.Image, err error) {
 	read, err := os.Open(path)
 	if err != nil {