Select everything if only an exclude is specified

cli/internal/scope/filter/filter.go

@@ -73,9 +73,21 @@ func (r *Resolver) filterGraph(selectors []*TargetSelector) (*SelectedPackages,
 			includeSelectors = append(includeSelectors, selector)
 		}
 	}
-	include, err := r.filterGraphWithSelectors(includeSelectors)
-	if err != nil {
-		return nil, err
+	var include *SelectedPackages
+	if len(includeSelectors) > 0 {
+		found, err := r.filterGraphWithSelectors(includeSelectors)
+		if err != nil {
+			return nil, err
+		}
+		include = found
+	} else {
+		vertexSet := make(util.Set)
+		for _, v := range r.Graph.Vertices() {
+			vertexSet.Add(v)
+		}
+		include = &SelectedPackages{
+			pkgs: vertexSet,
+		}
 	}
 	exclude, err := r.filterGraphWithSelectors(excludeSelectors)
 	if err != nil {

cli/internal/scope/filter/filter_test.go

@@ -182,7 +182,7 @@ func Test_filter(t *testing.T) {
 			},
 			[]string{"project-2"},
 		},
-    // Note: we don't support the option to switch path prefix mode
+		// Note: we don't support the option to switch path prefix mode
 		// {
 		// 	"select by parentDir",
 		// 	[]*TargetSelector{
@@ -219,6 +219,16 @@ func Test_filter(t *testing.T) {
 			},
 			[]string{"project-5"},
 		},
+		{
+			"select all packages except one",
+			[]*TargetSelector{
+				{
+					exclude:     true,
+					namePattern: "project-1",
+				},
+			},
+			[]string{"project-0", "project-2", "project-3", "project-4", "project-5", "project-6"},
+		},
 	}
 
 	for _, tc := range testCases {
@@ -228,6 +238,23 @@ func Test_filter(t *testing.T) {
 		}
 		setMatches(t, tc.Name, pkgs.pkgs, tc.Expected)
 	}
+
+	pkgs, err := r.GetFilteredPackages([]*TargetSelector{
+		{
+			excludeSelf:         true,
+			includeDependencies: true,
+			namePattern:         "project-7",
+		},
+	})
+	if err != nil {
+		t.Fatalf("unmatched filter failed to filter packages: %v", err)
+	}
+	if pkgs.pkgs.Len() != 0 {
+		t.Errorf("unmatched filter expected no packages, got %v", strings.Join(pkgs.pkgs.UnsafeListOfStrings(), ", "))
+	}
+	if len(pkgs.unusedFilters) != 1 {
+		t.Errorf("unmatched filter expected to report one unused filter, got %v", len(pkgs.unusedFilters))
+	}
 }
 
 func Test_matchScopedPackage(t *testing.T) {