pipe: re-use change command for correct behavior

as · as · commit ffe7728cab14 · 2018-10-21T14:37:27.000-07:00
diff --git a/cmd.go b/cmd.go
@@ -86,7 +86,7 @@ func (c WriteFile) Apply(ed Editor) {
 
 func (c Pipe) Apply(ed Editor) {
 	x := strings.Fields(c.To)
-	if len(x) == 0 {
+	if len(x) == 0 || x[0] == "" {
 		eprint("|: nothing on rhs")
 	}
 	n := x[0]
@@ -103,8 +103,7 @@ func (c Pipe) Apply(ed Editor) {
 	if err != nil {
 		eprint(err)
 	}
-	ed.Delete(q0, q1)
-	ed.Insert(buf.Bytes(), q0)
+	Change{To: buf.Bytes()}.Apply(ed)
 }
 func (c S) Apply(ed Editor) {
 	sp, ep := ed.Dot()

Original file line number	Diff line number	Diff line change
`@@ -86,7 +86,7 @@ func (c WriteFile) Apply(ed Editor) {`
`86`	`86`
`87`	`87`	`func (c Pipe) Apply(ed Editor) {`
`88`	`88`	`x := strings.Fields(c.To)`
`89`		`- if len(x) == 0 {`
	`89`	`+ if len(x) == 0 \|\| x[0] == "" {`
`90`	`90`	`eprint("\|: nothing on rhs")`
`91`	`91`	`}`
`92`	`92`	`n := x[0]`
`@@ -103,8 +103,7 @@ func (c Pipe) Apply(ed Editor) {`
`103`	`103`	`if err != nil {`
`104`	`104`	`eprint(err)`
`105`	`105`	`}`
`106`		`- ed.Delete(q0, q1)`
`107`		`- ed.Insert(buf.Bytes(), q0)`
	`106`	`+ Change{To: buf.Bytes()}.Apply(ed)`
`108`	`107`	`}`
`109`	`108`	`func (c S) Apply(ed Editor) {`
`110`	`109`	`sp, ep := ed.Dot()`