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cmd/go: avoid setting variables for '/' and ':' in TestScript subprocess environments

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Also simplify platform-dependent handling of the PATH variable,
to make it more like the existing platform-dependent handling for
HOME and TMPDIR.

Fixes #53671.

Change-Id: Ica2665d3f61988c66fb6982b9feb61ca48eced79
Reviewed-on: https://go-review.googlesource.com/c/go/+/416554
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Bryan C. Mills 2022-07-08 10:02:14 -04:00 committed by Bryan Mills
parent 180bcad33d
commit 5c1a13e7a4
3 changed files with 27 additions and 18 deletions
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9
src/cmd/go/go_test.go
View File

@ -1363,6 +1363,15 @@ func tempEnvName() string {
}
}
func pathEnvName() string {
switch runtime.GOOS {
case "plan9":
return "path"
default:
return "PATH"
}
}
func TestDefaultGOPATH(t *testing.T) {
tg := testgo(t)
defer tg.cleanup()

19
src/cmd/go/script_test.go
View File

@ -163,7 +163,7 @@ func (ts *testScript) setup() {
ts.cd = filepath.Join(ts.workdir, "gopath/src")
ts.env = []string{
"WORK=" + ts.workdir, // must be first for ts.abbrev
"PATH=" + testBin + string(filepath.ListSeparator) + os.Getenv("PATH"),
pathEnvName() + "=" + testBin + string(filepath.ListSeparator) + os.Getenv(pathEnvName()),
homeEnvName() + "=/no-home",
"CCACHE_DISABLE=1", // ccache breaks with non-existent HOME
"GOARCH=" + runtime.GOARCH,
@ -187,8 +187,6 @@ func (ts *testScript) setup() {
tempEnvName() + "=" + filepath.Join(ts.workdir, "tmp"),
"devnull=" + os.DevNull,
"goversion=" + goVersion(ts),
":=" + string(os.PathListSeparator),
"/=" + string(os.PathSeparator),
"CMDGO_TEST_RUN_MAIN=true",
}
if testenv.Builder() != "" || os.Getenv("GIT_TRACE_CURL") == "1" {
@ -203,10 +201,6 @@ func (ts *testScript) setup() {
ts.env = append(ts.env, "TESTGONETWORK=panic", "TESTGOVCS=panic")
}
if runtime.GOOS == "plan9" {
ts.env = append(ts.env, "path="+testBin+string(filepath.ListSeparator)+os.Getenv("path"))
}
for _, key := range extraEnvKeys {
if val := os.Getenv(key); val != "" {
ts.env = append(ts.env, key+"="+val)
@ -219,6 +213,10 @@ func (ts *testScript) setup() {
ts.envMap[kv[:i]] = kv[i+1:]
}
}
// Add entries for ${:} and ${/} to make it easier to write platform-independent
// environment variables.
ts.envMap["/"] = string(os.PathSeparator)
ts.envMap[":"] = string(os.PathListSeparator)
fmt.Fprintf(&ts.log, "# (%s)\n", time.Now().UTC().Format(time.RFC3339))
ts.mark = ts.log.Len()
@ -1264,12 +1262,7 @@ func (ts *testScript) lookPath(command string) (string, error) {
}
}
pathName := "PATH"
if runtime.GOOS == "plan9" {
pathName = "path"
}
for _, dir := range strings.Split(ts.envMap[pathName], string(filepath.ListSeparator)) {
for _, dir := range strings.Split(ts.envMap[pathEnvName()], string(filepath.ListSeparator)) {
if searchExt {
ents, err := os.ReadDir(dir)
if err != nil {

17
src/cmd/go/testdata/script/README vendored
View File

@ -41,12 +41,19 @@ Scripts also have access to these other environment variables:
GODEBUG=<actual GODEBUG>
devnull=<value of os.DevNull>
goversion=<current Go version; for example, 1.12>
:=<OS-specific path list separator>
The scripts' supporting files are unpacked relative to $GOPATH/src (aka $WORK/gopath/src)
and then the script begins execution in that directory as well. Thus the example above runs
in $WORK/gopath/src with GOPATH=$WORK/gopath and $WORK/gopath/src/hello.go
containing the listed contents.
On Plan 9, the variables $path and $home are set instead of $PATH and $HOME.
On Windows, the variables $USERPROFILE and $TMP are set instead of
$HOME and $TMPDIR.
In addition, variables named ':' and '/' are expanded within script arguments
(expanding to the value of os.PathListSeparator and os.PathSeparator
respectively) but are not inherited in subprocess environments.
The scripts' supporting files are unpacked relative to $GOPATH/src
(aka $WORK/gopath/src) and then the script begins execution in that directory as
well. Thus the example above runs in $WORK/gopath/src with GOPATH=$WORK/gopath
and $WORK/gopath/src/hello.go containing the listed contents.
The lines at the top of the script are a sequence of commands to be executed
by a tiny script engine in ../../script_test.go (not the system shell).