add missing any/none target check for paths (#1689)

## Description

the new pathFilterFactory now properly cleans
the inputs and checks for all-pass and all-fail
conditions.

## Type of change

- [x] 🐛 Bugfix

## Issue(s)

* #1616

## Test Plan

- [x] ⚡ Unit test

src/pkg/selectors/selectors.go

@@ -512,23 +512,42 @@ func filterize(sc scopeConfig, s ...string) filters.Filter {
 	return filters.Contains(join(s...))
 }
 
-type filterFunc func(string) filters.Filter
+type (
+	filterFunc      func(string) filters.Filter
+	sliceFilterFunc func([]string) filters.Filter
+)
 
 // pathFilterFactory returns the appropriate path filter
 // (contains, prefix, or suffix) for the provided options.
 // If multiple options are flagged, Prefix takes priority.
 // If no options are provided, returns PathContains.
-func pathFilterFactory(opts ...option) func([]string) filters.Filter {
+func pathFilterFactory(opts ...option) sliceFilterFunc {
 	sc := &scopeConfig{}
 	sc.populate(opts...)
 
+	var ff sliceFilterFunc
+
 	switch true {
 	case sc.usePrefixFilter:
-		return filters.PathPrefix
+		ff = filters.PathPrefix
 	case sc.useSuffixFilter:
-		return filters.PathSuffix
+		ff = filters.PathSuffix
 	default:
-		return filters.PathContains
+		ff = filters.PathContains
+	}
+
+	return wrapSliceFilter(ff)
+}
+
+func wrapSliceFilter(ff sliceFilterFunc) sliceFilterFunc {
+	return func(s []string) filters.Filter {
+		s = clean(s)
+
+		if f, ok := isAnyOrNone(s); ok {
+			return f
+		}
+
+		return ff(s)
 	}
 }
 
@@ -537,22 +556,37 @@ func pathFilterFactory(opts ...option) func([]string) filters.Filter {
 // - normalizes the cleaned input (returns anyFail if empty, allFail if *)
 // - joins the string
 // - and generates a filter with the joined input.
-func wrapFilter(ff filterFunc) func([]string) filters.Filter {
+func wrapFilter(ff filterFunc) sliceFilterFunc {
 	return func(s []string) filters.Filter {
 		s = clean(s)
 
-		if len(s) == 1 {
-			if s[0] == AnyTgt {
-				return passAny
-			}
-
-			if s[0] == NoneTgt {
-				return failAny
-			}
+		if f, ok := isAnyOrNone(s); ok {
+			return f
 		}
 
-		ss := join(s...)
-
-		return ff(ss)
+		return ff(join(s...))
 	}
 }
+
+// returns (<filter>, true) if s is len==1 and s[0] is
+// anyTgt or noneTgt, implying that the caller should use
+// the returned filter.  On (<filter>, false), the caller
+// can ignore the returned filter.
+// a special case exists for len(s)==0, interpreted as
+// "noneTgt"
+func isAnyOrNone(s []string) (filters.Filter, bool) {
+	switch len(s) {
+	case 0:
+		return failAny, true
+
+	case 1:
+		switch s[0] {
+		case AnyTgt:
+			return passAny, true
+		case NoneTgt:
+			return failAny, true
+		}
+	}
+
+	return failAny, false
+}

src/pkg/selectors/sharepoint_test.go

@@ -140,6 +140,41 @@ func (suite *SharePointSelectorSuite) TestSharePointSelector_Include_WebURLs() {
 	}
 }
 
+func (suite *SharePointSelectorSuite) TestSharePointSelector_Include_WebURLs_anyNone() {
+	table := []struct {
+		name   string
+		in     []string
+		expect string
+	}{
+		{
+			name:   "any",
+			in:     []string{AnyTgt},
+			expect: AnyTgt,
+		},
+		{
+			name:   "none",
+			in:     []string{NoneTgt},
+			expect: NoneTgt,
+		},
+	}
+	for _, test := range table {
+		suite.T().Run(test.name, func(t *testing.T) {
+			sel := NewSharePointRestore()
+			sel.Include(sel.WebURL(test.in))
+			scopes := sel.Includes
+			require.Len(t, scopes, 1)
+
+			for _, sc := range scopes {
+				scopeMustHave(
+					t,
+					SharePointScope(sc),
+					map[categorizer]string{SharePointWebURL: test.expect},
+				)
+			}
+		})
+	}
+}
+
 func (suite *SharePointSelectorSuite) TestSharePointSelector_Exclude_WebURLs() {
 	t := suite.T()
 	sel := NewSharePointRestore()