feat: find tree root via a user-specified command

Signed-off-by: Brian McGee <[email protected]>

Author: brianmcgee

cmd/root_test.go

@@ -1580,7 +1580,7 @@ func TestTreeRootExclusivity(t *testing.T) {
 		},
 	}
 
-	permutations := [][]string{
+	invalidCombinations := [][]string{
 		{"tree-root", "tree-root-cmd"},
 		{"tree-root", "tree-root-file"},
 		{"tree-root-cmd", "tree-root-file"},
@@ -1591,11 +1591,11 @@ func TestTreeRootExclusivity(t *testing.T) {
 	// Given that ultimately everything is being reduced into the config object after parsing from viper, I'm fairly
 	// confident if these tests all pass then the mixed methods should yield the same result.
 
-	// test permutations of the same type
-	for _, perm := range permutations {
+	// for each set of invalid args, test them with flags, environment variables, and config entries.
+	for _, combination := range invalidCombinations {
 		// test flags
 		var args []string
-		for _, key := range perm {
+		for _, key := range combination {
 			args = append(args, flagValues[key]...)
 		}
 
@@ -1607,7 +1607,7 @@ func TestTreeRootExclusivity(t *testing.T) {
 		// test env variables
 		env := make(map[string]string)
 
-		for _, key := range perm {
+		for _, key := range combination {
 			entry := envValues[key]
 			env[entry[0]] = entry[1]
 		}
@@ -1622,7 +1622,7 @@ func TestTreeRootExclusivity(t *testing.T) {
 			FormatterConfigs: formatterConfigs,
 		}
 
-		for _, key := range perm {
+		for _, key := range combination {
 			entry := configValues[key]
 			entry(cfg)
 		}