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Remove potential Go module versions from shortened names #571

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merged 6 commits into from
Oct 16, 2020
Merged

Remove potential Go module versions from shortened names #571

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88c96e4
Expand shortened name if package name appears to be a module version
zikaeroh Oct 9, 2020
011171f
Correct version regexp, use more generic names in tests, remove an em…
zikaeroh Oct 9, 2020
f25590d
Merge branch 'master' into module-version
nolanmar511 Oct 15, 2020
4b5efb1
80 character columns
zikaeroh Oct 16, 2020
5ca898f
Remove first matching Go module version from path
zikaeroh Oct 16, 2020
b05cf5f
Test and fix multi-version case
zikaeroh Oct 16, 2020
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3 changes: 3 additions & 0 deletions internal/graph/graph.go
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,8 @@ var (
// Removes package name and method arugments for Go function names.
// See tests for examples.
goRegExp = regexp.MustCompile(`^(?:[\w\-\.]+\/)+(.+)`)
// Removes potential module versions in a package path.
goVerRegExp = regexp.MustCompile(`^(.*)/v(?:[2-9]|[1-9][0-9]+)([./].*)$`)
// Strips C++ namespace prefix from a C++ function / method name.
// NOTE: Make sure to keep the template parameters in the name. Normally,
// template parameters are stripped from the C++ names but when
Expand Down Expand Up @@ -440,6 +442,7 @@ func newTree(prof *profile.Profile, o *Options) (g *Graph) {
// ShortenFunctionName returns a shortened version of a function's name.
func ShortenFunctionName(f string) string {
f = cppAnonymousPrefixRegExp.ReplaceAllString(f, "")
f = goVerRegExp.ReplaceAllString(f, `${1}${2}`)
for _, re := range []*regexp.Regexp{goRegExp, javaRegExp, cppRegExp} {
if matches := re.FindStringSubmatch(f); len(matches) >= 2 {
return strings.Join(matches[1:], "")
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24 changes: 24 additions & 0 deletions internal/graph/graph_test.go
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Expand Up @@ -451,6 +451,30 @@ func TestShortenFunctionName(t *testing.T) {
"github.com/blah/blah/vendor/gopkg.in/redis.v3.(*baseClient).(github.com/blah/blah/vendor/gopkg.in/redis.v3.process)-fm",
"redis.v3.(*baseClient).(github.com/blah/blah/vendor/gopkg.in/redis.v3.process)-fm",
},
{
"github.com/foo/bar/v4.(*Foo).Bar",
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Curious - why is version string sometimes a separate subdirectory and sometimes a prefix of the package name? Is this something that the package owners choose? Are these options restricted at these two, or are there more?

Oh, I guess it's a function of how deep below the versioning level the actual symbol is?

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I think you're referring to the tests; some of the tests I've added are where the "version" isn't a version at all. The only valid version in paths are "v2", "v3", ... "v1234", etc. So you'd have github.com/foo/bar, github.com/foo/bar/v2, github.com/foo/bar/v3, and so on, then subpackages like github.com/foo/bar/v3/baz. Custom domains mean you can have things like gotest.tools/assert, gotest.tools/v3/assert. But a package can be at the level where the version appears, so when github.com/jackc/pgx was bumped to github.com/jackc/pgx/v4, it's still referred to as pgx in the code.

But if it isn't a valid version part, then I don't want to treat it as one naively (i.e. "something.com/hello/v123xyz" isn't versioned, "something.com/hello/v123/xyz" is because the version is its own element).

"bar.(*Foo).Bar",
},
{
"github.com/foo/bar/v4/baz.Foo.Bar",
"baz.Foo.Bar",
},
{
"github.com/foo/bar/v123.(*Foo).Bar",
"bar.(*Foo).Bar",
},
{
"github.com/foobar/v0.(*Foo).Bar",
"v0.(*Foo).Bar",
},
{
"github.com/foobar/v1.(*Foo).Bar",
"v1.(*Foo).Bar",
},
{
"example.org/v2xyz.Foo",
"v2xyz.Foo",
},
{
"java.util.concurrent.ThreadPoolExecutor$Worker.run",
"ThreadPoolExecutor$Worker.run",
Expand Down