Fix: support stdin and url for vela ql (#4274)

Signed-off-by: Jianbo Sun <jianbo.sjb@alibaba-inc.com>

pkg/velaql/parse.go

@@ -17,8 +17,6 @@
 package velaql
 
 import (
-	"io/ioutil"
-	"path/filepath"
 	"regexp"
 	"strconv"
 	"strings"
@@ -26,6 +24,7 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/oam-dev/kubevela/pkg/cue/model/value"
+	"github.com/oam-dev/kubevela/references/common"
 )
 
 // QueryView contains query data
@@ -99,7 +98,7 @@ func ParseVelaQL(ql string) (QueryView, error) {
 
 // ParseVelaQLFromPath will parse a velaQL file path to QueryView
 func ParseVelaQLFromPath(velaQLViewPath string) (*QueryView, error) {
-	body, err := ioutil.ReadFile(filepath.Clean(velaQLViewPath))
+	body, err := common.ReadRemoteOrLocalPath(velaQLViewPath)
 	if err != nil {
 		return nil, errors.Errorf("read view file from %s: %v", velaQLViewPath, err)
 	}

references/cli/velaql.go

@@ -50,12 +50,12 @@ func NewQlCommand(c common.Args, order string, ioStreams util.IOStreams) *cobra.
 		Short: "Show result of executing velaQL.",
 		Long: `Show result of executing velaQL, use it like:
 		vela ql --query "<inner-view-name>{<param1>=<value1>,<param2>=<value2>}
-		vela ql --file=./ql.cue
+		vela ql --file ./ql.cue
 `,
 		Example: `Users can query with a query statement:
 		vela ql --query "<inner-view-name>{<param1>=<value1>,<param2>=<value2>}"
 They can also query by a ql file:
-		vela ql --file=./ql.cue
+		vela ql --file ./ql.cue
 
 Example content of ql.cue:
 ---
@@ -99,7 +99,7 @@ export: "status"
 			types.TagCommandType:  types.TypeApp,
 		},
 	}
-	cmd.Flags().StringVarP(&cueFile, "file", "f", "", "The CUE file path for VelaQL.")
+	cmd.Flags().StringVarP(&cueFile, "file", "f", "", "The CUE file path for VelaQL, it could be a remote url.")
 	cmd.Flags().StringVarP(&querySts, "query", "q", "", "The query statement for VelaQL.")
 	cmd.SetOut(ioStreams.Out)
 	return cmd