Initialize module and dependencies

vendor/golang.org/x/vuln/internal/govulncheck/handler.go

@@ -0,0 +1,65 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package govulncheck
+
+import (
+	"encoding/json"
+	"io"
+
+	"golang.org/x/vuln/internal/osv"
+)
+
+// Handler handles messages to be presented in a vulnerability scan output
+// stream.
+type Handler interface {
+	// Config communicates introductory message to the user.
+	Config(config *Config) error
+
+	// SBOM shows information about what govulncheck is scanning.
+	SBOM(sbom *SBOM) error
+
+	// Progress is called to display a progress message.
+	Progress(progress *Progress) error
+
+	// OSV is invoked for each osv Entry in the stream.
+	OSV(entry *osv.Entry) error
+
+	// Finding is called for each vulnerability finding in the stream.
+	Finding(finding *Finding) error
+}
+
+// HandleJSON reads the json from the supplied stream and hands the decoded
+// output to the handler.
+func HandleJSON(from io.Reader, to Handler) error {
+	dec := json.NewDecoder(from)
+	for dec.More() {
+		msg := Message{}
+		// decode the next message in the stream
+		if err := dec.Decode(&msg); err != nil {
+			return err
+		}
+		// dispatch the message
+		var err error
+		if msg.Config != nil {
+			err = to.Config(msg.Config)
+		}
+		if msg.Progress != nil {
+			err = to.Progress(msg.Progress)
+		}
+		if msg.SBOM != nil {
+			err = to.SBOM(msg.SBOM)
+		}
+		if msg.OSV != nil {
+			err = to.OSV(msg.OSV)
+		}
+		if msg.Finding != nil {
+			err = to.Finding(msg.Finding)
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}