cmd/go: skip some tests that run builds in short mode

cmd/go tests that run builds are generally skipped in short mode. This
change will adds skips for some tests that were running builds.

I found these by sorting tests by elapsed time and removing the top
tests that invoked go build. It's our practice to skip tests that run go
build without the -n flag (which prints but doesn't execute commands).

On my work laptop this reduces test run time from about 20 seconds to
about 16 seconds. On my linux workstation it reduces test run time from
about 10 seconds to about 5 seconds.

Change-Id: I18ffcc231df013cb6ac5f5eb3544bed28dadeda8
Reviewed-on: https://go-review.googlesource.com/c/go/+/653775
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

src/cmd/go/go_test.go

@@ -1147,6 +1147,8 @@ func TestGoListCompiledCgo(t *testing.T) {
 }
 
 func TestGoListExport(t *testing.T) {
+	tooSlow(t, "runs build for -export")
+
 	skipIfGccgo(t, "gccgo does not have standard packages")
 	tg := testgo(t)
 	defer tg.cleanup()

src/cmd/go/note_test.go

@@ -13,6 +13,8 @@ import (
 )
 
 func TestNoteReading(t *testing.T) {
+	tooSlow(t, "runs build")
+
 	// cmd/internal/buildid already has tests that the basic reading works.
 	// This test is essentially checking that -ldflags=-buildid=XXX works,
 	// both in internal and external linking mode.

src/cmd/go/testdata/script/build_GOTMPDIR.txt

@@ -1,3 +1,5 @@
+[short] skip 'runs build'
+
 # Set GOCACHE to a clean directory to ensure that 'go build' has work to report.
 [!GOOS:windows] env GOCACHE=$WORK/gocache
 [GOOS:windows] env GOCACHE=$WORK\gocache

src/cmd/go/testdata/script/cgo_path.txt

@@ -1,3 +1,5 @@
+[short] skip 'runs build'
+
 [!cgo] skip
 
 # Require that CC is something that requires a PATH lookup.

src/cmd/go/testdata/script/clean_cache_n.txt

@@ -1,3 +1,5 @@
+[short] skip 'runs go build'
+
 # We're testing cache behavior, so start with a clean GOCACHE.
 env GOCACHE=$WORK/cache
 

src/cmd/go/testdata/script/goauth_userauth.txt

@@ -1,6 +1,8 @@
 # This test covers the HTTP authentication mechanism over GOAUTH by using a custom authenticator.
 # See golang.org/issue/26232
 
+[short] skip 'runs build to create authenticators'
+
 env GOPROXY=direct
 env GOSUMDB=off
 mkdir $WORK/bin

src/cmd/go/testdata/script/test_skip.txt

@@ -1,3 +1,5 @@
+[short] skip 'runs test'
+
 go test -v -run Test -skip T skip_test.go
 ! stdout RUN
 stdout '^ok.*\[no tests to run\]'

src/cmd/go/testdata/script/vet_flags.txt

@@ -1,3 +1,5 @@
+[short] skip 'runs test'
+
 env GO111MODULE=on
 
 # Issue 35837: "go vet -<analyzer> <std package>" should use the requested

src/cmd/go/testdata/script/work.txt

@@ -1,3 +1,5 @@
+[short] skip 'runs go run'
+
 ! go work init doesnotexist
 stderr 'go: directory doesnotexist does not exist'
 go env GOWORK