should output [] if no packages to write

mattn · sdboyer · commit 9bb5c62c700b · 2017-02-06T09:13:22.000-08:00
diff --git a/cmd/dep/status.go b/cmd/dep/status.go
@@ -126,7 +126,9 @@ type jsonOutput struct {
 	missing []*MissingStatus
 }
 
-func (out *jsonOutput) BasicHeader() {}
+func (out *jsonOutput) BasicHeader() {
+	out.basic = []*BasicStatus{}
+}
 
 func (out *jsonOutput) BasicFooter() {
 	json.NewEncoder(out.w).Encode(out.basic)
@@ -137,6 +139,7 @@ func (out *jsonOutput) BasicLine(bs *BasicStatus) {
 }
 
 func (out *jsonOutput) MissingHeader() {
+	out.missing = []*MissingStatus{}
 }
 
 func (out *jsonOutput) MissingLine(ms *MissingStatus) {

Original file line number	Diff line number	Diff line change
`@@ -126,7 +126,9 @@ type jsonOutput struct {`
`126`	`126`	`missing []*MissingStatus`
`127`	`127`	`}`
`128`	`128`
`129`		`-func (out *jsonOutput) BasicHeader() {}`
	`129`	`+func (out *jsonOutput) BasicHeader() {`
	`130`	`+ out.basic = []*BasicStatus{}`
	`131`	`+}`
`130`	`132`
`131`	`133`	`func (out *jsonOutput) BasicFooter() {`
`132`	`134`	`json.NewEncoder(out.w).Encode(out.basic)`
`@@ -137,6 +139,7 @@ func (out jsonOutput) BasicLine(bs BasicStatus) {`
`137`	`139`	`}`
`138`	`140`
`139`	`141`	`func (out *jsonOutput) MissingHeader() {`
	`142`	`+ out.missing = []*MissingStatus{}`
`140`	`143`	`}`
`141`	`144`
`142`	`145`	`func (out jsonOutput) MissingLine(ms MissingStatus) {`