feat: proper error codes management

Closes #14

Author: BoxBoxJason

.gitignore

@@ -55,7 +55,6 @@ Desktop.ini
 *.pub
 
 mirroring.json
-go.sum
 republisher.sh
 
 # Reports files
@@ -65,4 +64,6 @@ coverage.out
 .scannerwork/
 *-report*
 .sonarlint/
-dependency-check/
+dependency-check/
+
+.copilot/

go.mod

@@ -7,16 +7,16 @@ require (
 	github.com/go-git/go-git/v5 v5.16.3
 	github.com/hashicorp/go-retryablehttp v0.7.8
 	github.com/spf13/cobra v1.10.1
-	gitlab.com/gitlab-org/api/client-go v0.157.1
-	go.uber.org/zap v1.27.0
+	gitlab.com/gitlab-org/api/client-go v0.160.1
+	go.uber.org/zap v1.27.1
 )
 
 require (
 	dario.cat/mergo v1.0.2 // indirect
 	github.com/Microsoft/go-winio v0.6.2 // indirect
 	github.com/ProtonMail/go-crypto v1.3.0 // indirect
 	github.com/cloudflare/circl v1.6.1 // indirect
-	github.com/cyphar/filepath-securejoin v0.4.1 // indirect
+	github.com/cyphar/filepath-securejoin v0.6.1 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
 	github.com/go-git/go-billy/v5 v5.6.2 // indirect
@@ -29,15 +29,15 @@ require (
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
 	github.com/pjbgf/sha1cd v0.5.0 // indirect
 	github.com/sergi/go-diff v1.4.0 // indirect
-	github.com/skeema/knownhosts v1.3.1 // indirect
+	github.com/skeema/knownhosts v1.3.2 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/xanzy/ssh-agent v0.3.3 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/crypto v0.42.0 // indirect
-	golang.org/x/exp v0.0.0-20250911091902-df9299821621 // indirect
-	golang.org/x/net v0.44.0 // indirect
-	golang.org/x/oauth2 v0.31.0 // indirect
-	golang.org/x/sys v0.36.0 // indirect
-	golang.org/x/time v0.13.0 // indirect
+	golang.org/x/crypto v0.45.0 // indirect
+	golang.org/x/exp v0.0.0-20251113190631-e25ba8c21ef6 // indirect
+	golang.org/x/net v0.47.0 // indirect
+	golang.org/x/oauth2 v0.33.0 // indirect
+	golang.org/x/sys v0.38.0 // indirect
+	golang.org/x/time v0.14.0 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 )

go.sum

@@ -0,0 +1,143 @@
+dario.cat/mergo v1.0.2 h1:85+piFYR1tMbRrLcDwR18y4UKJ3aH1Tbzi24VRW1TK8=
+dario.cat/mergo v1.0.2/go.mod h1:E/hbnu0NxMFBjpMIE34DRGLWqDy0g5FuKDhCb31ngxA=
+github.com/Masterminds/semver/v3 v3.4.0 h1:Zog+i5UMtVoCU8oKka5P7i9q9HgrJeGzI9SA1Xbatp0=
+github.com/Masterminds/semver/v3 v3.4.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=
+github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=
+github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
+github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
+github.com/ProtonMail/go-crypto v1.3.0 h1:ILq8+Sf5If5DCpHQp4PbZdS1J7HDFRXz/+xKBiRGFrw=
+github.com/ProtonMail/go-crypto v1.3.0/go.mod h1:9whxjD8Rbs29b4XWbB8irEcE8KHMqaR2e7GWU1R+/PE=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
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+github.com/cloudflare/circl v1.6.1 h1:zqIqSPIndyBh1bjLVVDHMPpVKqp8Su/V+6MeDzzQBQ0=
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pkg/helpers/errtypes.go

@@ -0,0 +1,52 @@
+package helpers
+
+import "errors"
+
+// Severity represents the severity level of an error.
+type Severity int
+
+const (
+	// SeverityNone indicates no error.
+	SeverityNone Severity = iota
+	// SeverityNonBlocking indicates a non-blocking error.
+	SeverityNonBlocking
+	// SeverityBlocking indicates a blocking error.
+	SeverityBlocking
+)
+
+// MirrorError wraps an error with a severity level.
+type MirrorError struct {
+	Err      error
+	Severity Severity
+}
+
+// Error implements the error interface.
+func (e MirrorError) Error() string {
+	return e.Err.Error()
+}
+
+// Unwrap returns the underlying error.
+func (e MirrorError) Unwrap() error {
+	return e.Err
+}
+
+// NewBlocking creates a new blocking error.
+func NewBlocking(err error) MirrorError {
+	return MirrorError{Err: err, Severity: SeverityBlocking}
+}
+
+// NewNonBlocking creates a new non-blocking error.
+func NewNonBlocking(err error) MirrorError {
+	return MirrorError{Err: err, Severity: SeverityNonBlocking}
+}
+
+// SeverityOf returns the severity of the error.
+// If the error is a MirrorError, it returns its severity.
+// Otherwise, it defaults to SeverityBlocking.
+func SeverityOf(err error) Severity {
+	var mirrorErr MirrorError
+	if errors.As(err, &mirrorErr) {
+		return mirrorErr.Severity
+	}
+	return SeverityBlocking
+}

pkg/helpers/errtypes_test.go

@@ -0,0 +1,84 @@
+package helpers
+
+import (
+	"errors"
+	"testing"
+)
+
+const (
+	testErrorMsg = "test error"
+)
+
+func TestNewBlocking(t *testing.T) {
+	err := errors.New(testErrorMsg)
+	mirrorErr := NewBlocking(err)
+	if mirrorErr.Err != err {
+		t.Errorf("Expected Err to be %v, got %v", err, mirrorErr.Err)
+	}
+	if mirrorErr.Severity != SeverityBlocking {
+		t.Errorf("Expected Severity to be %v, got %v", SeverityBlocking, mirrorErr.Severity)
+	}
+}
+
+func TestNewNonBlocking(t *testing.T) {
+	err := errors.New(testErrorMsg)
+	mirrorErr := NewNonBlocking(err)
+	if mirrorErr.Err != err {
+		t.Errorf("Expected Err to be %v, got %v", err, mirrorErr.Err)
+	}
+	if mirrorErr.Severity != SeverityNonBlocking {
+		t.Errorf("Expected Severity to be %v, got %v", SeverityNonBlocking, mirrorErr.Severity)
+	}
+}
+
+func TestMirrorErrorError(t *testing.T) {
+	err := errors.New(testErrorMsg)
+	mirrorErr := MirrorError{Err: err, Severity: SeverityBlocking}
+	if mirrorErr.Error() != testErrorMsg {
+		t.Errorf("Expected Error() to return '%s', got '%s'", testErrorMsg, mirrorErr.Error())
+	}
+}
+
+func TestMirrorErrorUnwrap(t *testing.T) {
+	err := errors.New(testErrorMsg)
+	mirrorErr := MirrorError{Err: err, Severity: SeverityBlocking}
+	if mirrorErr.Unwrap() != err {
+		t.Errorf("Expected Unwrap() to return %v, got %v", err, mirrorErr.Unwrap())
+	}
+}
+
+func TestSeverityOf(t *testing.T) {
+	tests := []struct {
+		name     string
+		err      error
+		expected Severity
+	}{
+		{
+			name:     "blocking error",
+			err:      NewBlocking(errors.New("blocking")),
+			expected: SeverityBlocking,
+		},
+		{
+			name:     "non-blocking error",
+			err:      NewNonBlocking(errors.New("non-blocking")),
+			expected: SeverityNonBlocking,
+		},
+		{
+			name:     "plain error defaults to blocking",
+			err:      errors.New("plain error"),
+			expected: SeverityBlocking,
+		},
+		{
+			name:     "nil error defaults to blocking",
+			err:      nil,
+			expected: SeverityBlocking,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := SeverityOf(tt.err); got != tt.expected {
+				t.Errorf("SeverityOf() = %v, want %v", got, tt.expected)
+			}
+		})
+	}
+}