remove github.com/pkg/errors in favor of stdlib

Author: kminehart

completion.go

@@ -3,13 +3,16 @@ package sqlds
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"net/http"
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
-	"github.com/pkg/errors"
 )
 
+// ErrorNotImplemented is returned if the function is not implemented by the provided Driver (the Completable pointer is nil)
+var ErrorNotImplemented = errors.New("not implemented")
+
 // Completable will be used to autocomplete Tables Schemas and Columns for SQL languages
 type Completable interface {
 	Schemas(ctx context.Context) ([]string, error)
@@ -43,7 +46,7 @@ type columnRequest struct {
 
 func (ds *sqldatasource) getSchemas(rw http.ResponseWriter, req *http.Request) {
 	if ds.Completable == nil {
-		handleError(rw, errors.New("not implemented"))
+		handleError(rw, ErrorNotImplemented)
 		return
 	}
 
@@ -58,7 +61,7 @@ func (ds *sqldatasource) getSchemas(rw http.ResponseWriter, req *http.Request) {
 
 func (ds *sqldatasource) getTables(rw http.ResponseWriter, req *http.Request) {
 	if ds.Completable == nil {
-		handleError(rw, errors.New("not implemented"))
+		handleError(rw, ErrorNotImplemented)
 		return
 	}
 
@@ -78,7 +81,7 @@ func (ds *sqldatasource) getTables(rw http.ResponseWriter, req *http.Request) {
 
 func (ds *sqldatasource) getColumns(rw http.ResponseWriter, req *http.Request) {
 	if ds.Completable == nil {
-		handleError(rw, errors.New("not implemented"))
+		handleError(rw, ErrorNotImplemented)
 		return
 	}
 

errors.go

@@ -1,9 +1,9 @@
 package sqlds
 
-import "github.com/pkg/errors"
+import "errors"
 
 var (
-	// ErrorBadDatasource ...
+	// ErrorBadDatasource is returned if the data source could not be asserted to the correct type (this should basically never happen?)
 	ErrorBadDatasource = errors.New("type assertion to datasource failed")
 	// ErrorJSON is returned when json.Unmarshal fails
 	ErrorJSON = errors.New("error unmarshaling query JSON the Query Model")

go.mod

@@ -4,6 +4,5 @@ go 1.15
 
 require (
 	github.com/grafana/grafana-plugin-sdk-go v0.94.0
-	github.com/pkg/errors v0.9.1
 	github.com/stretchr/testify v1.7.0
 )

go.sum

@@ -251,7 +251,6 @@ github.com/pierrec/lz4 v1.0.2-0.20190131084431-473cd7ce01a1/go.mod h1:3/3N9NVKO0
 github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/profile v1.2.1/go.mod h1:hJw3o1OdXxsrSjjVksARp5W95eeEaEfptyVZyv6JUPA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=

macros.go

@@ -1,11 +1,10 @@
 package sqlds
 
 import (
+	"errors"
 	"fmt"
 	"regexp"
 	"strings"
-
-	"github.com/pkg/errors"
 )
 
 var (