vendor dependencies with dep

vendor/github.com/go-pg/pg/internal/error.go

@@ -0,0 +1,62 @@
+package internal
+
+import (
+	"errors"
+	"fmt"
+)
+
+var ErrNoRows = errors.New("pg: no rows in result set")
+var ErrMultiRows = errors.New("pg: multiple rows in result set")
+
+type Error struct {
+	s string
+}
+
+func Errorf(s string, args ...interface{}) Error {
+	return Error{s: fmt.Sprintf(s, args...)}
+}
+
+func (err Error) Error() string {
+	return err.s
+}
+
+type PGError struct {
+	m map[byte]string
+}
+
+func NewPGError(m map[byte]string) PGError {
+	return PGError{
+		m: m,
+	}
+}
+
+func (err PGError) Field(k byte) string {
+	return err.m[k]
+}
+
+func (err PGError) IntegrityViolation() bool {
+	switch err.Field('C') {
+	case "23000", "23001", "23502", "23503", "23505", "23514", "23P01":
+		return true
+	default:
+		return false
+	}
+}
+
+func (err PGError) Error() string {
+	return fmt.Sprintf(
+		"%s #%s %s (addr=%q)",
+		err.Field('S'), err.Field('C'), err.Field('M'), err.Field('a'),
+	)
+}
+
+func AssertOneRow(l int) error {
+	switch {
+	case l == 0:
+		return ErrNoRows
+	case l > 1:
+		return ErrMultiRows
+	default:
+		return nil
+	}
+}