cmd/go: exclude empty cover package

forsaken628 · forsaken628 · commit 1062c9ad9474 · 2020-12-17T18:00:23.000+08:00
For golang#43242
diff --git a/src/cmd/go/internal/test/test.go b/src/cmd/go/internal/test/test.go
@@ -731,6 +731,11 @@ func runTest(ctx context.Context, cmd *base.Command, args []string) {
 				continue
 			}
 
+			// There is nothing to cover, just make building fail.
+			if len(p.GoFiles) == 0 && !p.UsesCgo() && !p.UsesSwig() {
+				continue
+			}
+
 			if haveMatch {
 				testCoverPkgs = append(testCoverPkgs, p)
 			}

Original file line number	Diff line number	Diff line change
`@@ -731,6 +731,11 @@ func runTest(ctx context.Context, cmd *base.Command, args []string) {`
`731`	`731`	`continue`
`732`	`732`	`}`
`733`	`733`
	`734`	`+ // There is nothing to cover, just make building fail.`
	`735`	`+ if len(p.GoFiles) == 0 && !p.UsesCgo() && !p.UsesSwig() {`
	`736`	`+ continue`
	`737`	`+ }`
	`738`	`+`
`734`	`739`	`if haveMatch {`
`735`	`740`	`testCoverPkgs = append(testCoverPkgs, p)`
`736`	`741`	`}`