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cmd/go: respect -coverpkg for unselected no-test packages

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This patch fixes a bug in the code that reports coverage percentages
and/or profiles for packages without tests. Specifically, the code
added as part of the fix for issue 24570 (in CL 495447) didn't
properly consider the -coverpkg selection and would look for the build
action meta-data file for a package that wasn't actually selected for
coverage.

Fixes #65653.

Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest
Change-Id: I66ffac11783c00a8cbd855fd05b9a90e4e0ed402
Reviewed-on: https://go-review.googlesource.com/c/go/+/568835
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
This commit is contained in:
Than McIntosh 2024-03-04 15:52:56 +00:00
parent f1722e9a6e
commit 2b22fc1045
2 changed files with 9 additions and 1 deletions
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2
src/cmd/go/internal/test/test.go
View File

@ -1404,7 +1404,7 @@ func (r *runTestActor) Act(b *work.Builder, ctx context.Context, a *work.Action)
if p := a.Package; len(p.TestGoFiles)+len(p.XTestGoFiles) == 0 {
reportNoTestFiles := true
if cfg.BuildCover && cfg.Experiment.CoverageRedesign {
if cfg.BuildCover && cfg.Experiment.CoverageRedesign && p.Internal.Cover.GenMeta {
if err := sh.Mkdir(a.Objdir); err != nil {
return err
}

8
src/cmd/go/testdata/script/cover_coverpkg_partial.txt vendored
View File

@ -39,6 +39,14 @@ go test -coverprofile=baz.p -coverpkg=./a,./d,./f ./b ./f
stdout '^ok\s+M/b\s+\S+\s+coverage: 83.3% of statements in ./a, ./d, ./f'
stdout '^\s*M/f\s+coverage: 0.0% of statements'
# This sub-test inspired by issue 65653: if package P is is matched
# via the package pattern supplied as the argument to "go test -cover"
# but P is not part of "-coverpkg", then we don't want coverage for P
# (including the specific case where P has no test files).
go test -coverpkg=./a ./...
stdout '^ok\s+M/a\s+\S+\s+coverage: 100.0% of statements in ./a'
stdout '^\s*\?\s+M/f\s+\[no test files\]'
-- a/a.go --
package a