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Merge pull request #231 from bmeg/dig-driver
GRIPPER plugin driver
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| package dig | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "log" | ||
| "os" | ||
|
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| "github.com/bmeg/grip/gripper" | ||
|
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| "github.com/bmeg/grip/gdbi" | ||
| "github.com/golang/protobuf/jsonpb" | ||
|
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| "github.com/spf13/cobra" | ||
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| "encoding/json" | ||
| "strings" | ||
|
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| "github.com/bmeg/grip/gripql" | ||
| gripqljs "github.com/bmeg/grip/gripql/javascript" | ||
| "github.com/bmeg/grip/jsengine/underscore" | ||
| "github.com/dop251/goja" | ||
|
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| "github.com/bmeg/grip/engine/pipeline" | ||
| "github.com/bmeg/grip/util" | ||
| ) | ||
|
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| var idxName string = "table.db" | ||
|
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| func ParseQuery(queryString string) (*gripql.GraphQuery, error) { | ||
| vm := goja.New() | ||
|
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| us, err := underscore.Asset("underscore.js") | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to load underscore.js") | ||
| } | ||
| if _, err := vm.RunString(string(us)); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| gripqlString, err := gripqljs.Asset("gripql.js") | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to load gripql.js") | ||
| } | ||
| if _, err := vm.RunString(string(gripqlString)); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| val, err := vm.RunString(queryString) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| queryJSON, err := json.Marshal(val) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| query := gripql.GraphQuery{} | ||
| err = jsonpb.Unmarshal(strings.NewReader(string(queryJSON)), &query) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &query, nil | ||
| } | ||
|
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| func Query(graph gdbi.GraphInterface, query *gripql.GraphQuery) error { | ||
| marsh := jsonpb.Marshaler{} | ||
|
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| p, err := graph.Compiler().Compile(query.Query) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| workdir := "./test.workdir." + util.RandomString(6) | ||
| defer os.RemoveAll(workdir) | ||
| res := pipeline.Run(context.Background(), p, workdir) | ||
|
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| for row := range res { | ||
| rowString, _ := marsh.MarshalToString(row) | ||
| fmt.Printf("%s\n", rowString) | ||
| } | ||
| return nil | ||
| } | ||
|
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| // Cmd command line declaration | ||
| var Cmd = &cobra.Command{ | ||
| Use: "dig <config> <query>", | ||
| Short: "Do a single query using the gripper driver", | ||
| Long: ``, | ||
| Args: cobra.ExactArgs(2), | ||
| RunE: func(cmd *cobra.Command, args []string) error { | ||
|
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| configFile := args[0] | ||
| queryString := args[1] | ||
|
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| config := gripper.Config{Graphs: map[string]string{"main": configFile}} | ||
|
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| gdb, err := gripper.NewGDB(config, "./") | ||
| if err != nil { | ||
| log.Printf("Error loading Graph: %s", err) | ||
| return err | ||
| } | ||
|
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| graph, err := gdb.Graph("main") | ||
| if err != nil { | ||
| log.Printf("%s", err) | ||
| return err | ||
| } | ||
|
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| query, err := ParseQuery(queryString) | ||
| if err != nil { | ||
| log.Printf("%s", err) | ||
| return err | ||
| } | ||
| log.Printf("Query: %#v", query) | ||
| Query(graph, query) | ||
|
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| gdb.Close() | ||
| return nil | ||
| }, | ||
| } | ||
|
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| func init() { | ||
| flags := Cmd.Flags() | ||
| flags.StringVar(&idxName, "db", idxName, "Path to index db") | ||
| } |
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