internal/gps: extract ValidateParams

Signed-off-by: Ibrahim AshShohail <ibra.sho@gmail.com>

cmd/dep/ensure.go

@@ -142,15 +142,20 @@ func (cmd *ensureCommand) Run(ctx *dep.Ctx, args []string) error {
 		}
 	}
 
-	solver, err := gps.Prepare(params, sm)
+	err = gps.ValidateParams(params, sm)
 	if err != nil {
-		if deduceErrs, ok := err.(gps.DeductionFailureErrs); ok {
+		if deduceErrs, ok := err.(gps.DeductionErrs); ok {
 			ctx.Loggers.Err.Println("The following errors occurred while deducing packages:")
 			for ip, dErr := range deduceErrs {
 				ctx.Loggers.Err.Printf("  * \"%s\": %s", ip, dErr)
 			}
 			ctx.Loggers.Err.Println()
 		}
+		return errors.Wrap(err, "validateParams")
+	}
+
+	solver, err := gps.Prepare(params, sm)
+	if err != nil {
 		return errors.Wrap(err, "ensure Prepare")
 	}
 

internal/gps/hash_test.go

@@ -27,13 +27,6 @@ func TestHashInputs(t *testing.T) {
 
 	s, err := Prepare(params, newdepspecSM(fix.ds, nil))
 	if err != nil {
-		if deduceErrs, ok := err.(DeductionFailureErrs); ok {
-			t.Error("The following errors occurred while deducing packages:")
-			for ip, dErr := range deduceErrs {
-				t.Errorf("  * \"%s\": %s", ip, dErr)
-			}
-			t.Error()
-		}
 		t.Fatalf("Unexpected error while prepping solver: %s", err)
 	}
 
@@ -87,13 +80,6 @@ func TestHashInputsReqsIgs(t *testing.T) {
 
 	s, err := Prepare(params, newdepspecSM(fix.ds, nil))
 	if err != nil {
-		if deduceErrs, ok := err.(DeductionFailureErrs); ok {
-			t.Error("The following errors occurred while deducing packages:")
-			for ip, dErr := range deduceErrs {
-				t.Errorf("  * \"%s\": %s", ip, dErr)
-			}
-			t.Error()
-		}
 		t.Fatalf("Unexpected error while prepping solver: %s", err)
 	}
 
@@ -136,13 +122,6 @@ func TestHashInputsReqsIgs(t *testing.T) {
 
 	s, err = Prepare(params, newdepspecSM(fix.ds, nil))
 	if err != nil {
-		if deduceErrs, ok := err.(DeductionFailureErrs); ok {
-			t.Error("The following errors occurred while deducing packages:")
-			for ip, dErr := range deduceErrs {
-				t.Errorf("  * \"%s\": %s", ip, dErr)
-			}
-			t.Error()
-		}
 		t.Fatalf("Unexpected error while prepping solver: %s", err)
 	}
 
@@ -183,13 +162,6 @@ func TestHashInputsReqsIgs(t *testing.T) {
 
 	s, err = Prepare(params, newdepspecSM(fix.ds, nil))
 	if err != nil {
-		if deduceErrs, ok := err.(DeductionFailureErrs); ok {
-			t.Error("The following errors occurred while deducing packages:")
-			for ip, dErr := range deduceErrs {
-				t.Errorf("  * \"%s\": %s", ip, dErr)
-			}
-			t.Error()
-		}
 		t.Fatalf("Unexpected error while prepping solver: %s", err)
 	}
 
@@ -556,13 +528,6 @@ func TestHashInputsOverrides(t *testing.T) {
 
 		s, err := Prepare(params, newdepspecSM(basefix.ds, nil))
 		if err != nil {
-			if deduceErrs, ok := err.(DeductionFailureErrs); ok {
-				t.Error("The following errors occurred while deducing packages:")
-				for ip, dErr := range deduceErrs {
-					t.Errorf("  * \"%s\": %s", ip, dErr)
-				}
-				t.Error()
-			}
 			t.Errorf("(fix: %q) Unexpected error while prepping solver: %s", fix.name, err)
 			continue
 		}

internal/gps/solve_failures.go

@@ -239,11 +239,11 @@ func (e badOptsFailure) Error() string {
 	return string(e)
 }
 
-// DeductionFailureErrs maps package import path to errors occurring during deduction.
-type DeductionFailureErrs map[string]error
+// DeductionErrs maps package import path to errors occurring during deduction.
+type DeductionErrs map[string]error
 
-func (e DeductionFailureErrs) Error() string {
-	return "could not deduce packages to ensure constraints are solvable"
+func (e DeductionErrs) Error() string {
+	return "could not deduce external imports' project roots"
 }
 
 type sourceMismatchFailure struct {

internal/gps/solver.go

@@ -284,11 +284,6 @@ func Prepare(params SolveParameters, sm SourceManager) (Solver, error) {
 		params.stdLibFn = paths.IsStandardImportPath
 	}
 
-	// Validate the solver parameters
-	if err := validateParams(sm, rd, params.stdLibFn); err != nil {
-		return nil, err
-	}
-
 	s := &solver{
 		tl:       params.TraceLogger,
 		stdLibFn: params.stdLibFn,
@@ -538,13 +533,18 @@ func (s *solver) solve() (map[atom]map[string]struct{}, error) {
 	return projs, nil
 }
 
-// validateParams validates the solver parameters to ensure solving can be completed.
-func validateParams(sm SourceManager, rd rootdata, stdLibFn func(string) bool) error {
+// ValidateParams validates the solver parameters to ensure solving can be completed.
+func ValidateParams(params SolveParameters, sm SourceManager) error {
 	// Ensure that all packages are deducible without issues.
 	var deducePkgsGroup sync.WaitGroup
-	deductionErrs := make(DeductionFailureErrs)
+	deductionErrs := make(DeductionErrs)
 	var errsMut sync.Mutex
 
+	rd, err := params.toRootdata()
+	if err != nil {
+		return err
+	}
+
 	deducePkg := func(ip string, sm SourceManager) {
 		_, err := sm.DeduceProjectRoot(ip)
 		if err != nil {
@@ -555,7 +555,7 @@ func validateParams(sm SourceManager, rd rootdata, stdLibFn func(string) bool) e
 		deducePkgsGroup.Done()
 	}
 
-	for _, ip := range rd.externalImportList(stdLibFn) {
+	for _, ip := range rd.externalImportList(paths.IsStandardImportPath) {
 		deducePkgsGroup.Add(1)
 		go deducePkg(ip, sm)
 	}