Rearrange path validation to allow ports

gps/deduce.go

@@ -67,7 +67,7 @@ var (
 	//gpinOldRegex = regexp.MustCompile(`^(?P<root>gopkg\.in/(?:([a-z0-9][-a-z0-9]+)/)?((?:v0|v[1-9][0-9]*)(?:\.0|\.[1-9][0-9]*){0,2}(-unstable)?)/([a-zA-Z][-a-zA-Z0-9]*)(?:\.git)?)((?:/[a-zA-Z][-a-zA-Z0-9]*)*)$`)
 	bbRegex = regexp.MustCompile(`^(?P<root>bitbucket\.org(?P<bitname>/[A-Za-z0-9_.\-]+/[A-Za-z0-9_.\-]+))((?:/[A-Za-z0-9_.\-]+)*)$`)
 	//lpRegex = regexp.MustCompile(`^(?P<root>launchpad\.net/([A-Za-z0-9-._]+)(/[A-Za-z0-9-._]+)?)(/.+)?`)
-	lpRegex = regexp.MustCompile(`^(?P<root>launchpad\.net(/[A-Za-z0-9-._]+))((?:/[A-Za-z0-9_.\-]+)*)?`)
+	lpRegex = regexp.MustCompile(`^(?P<root>launchpad\.net(/[A-Za-z0-9-._]+))((?:/[A-Za-z0-9_.\-]+)*)?$`)
 	//glpRegex = regexp.MustCompile(`^(?P<root>git\.launchpad\.net/([A-Za-z0-9_.\-]+)|~[A-Za-z0-9_.\-]+/(\+git|[A-Za-z0-9_.\-]+)/[A-Za-z0-9_.\-]+)$`)
 	glpRegex = regexp.MustCompile(`^(?P<root>git\.launchpad\.net(/[A-Za-z0-9_.\-]+))((?:/[A-Za-z0-9_.\-]+)*)$`)
 	//gcRegex      = regexp.MustCompile(`^(?P<root>code\.google\.com/[pr]/(?P<project>[a-z0-9\-]+)(\.(?P<subrepo>[a-z0-9\-]+))?)(/[A-Za-z0-9_.\-]+)*$`)
@@ -786,7 +786,12 @@ func (hmd *httpMetadataDeducer) deduce(ctx context.Context, path string) (pathDe
 	return hmd.deduced, hmd.deduceErr
 }
 
-func normalizeURI(p string) (u *url.URL, newpath string, err error) {
+// normalizeURI takes a path string - which can be a plain import path, or a
+// proper URI, or something SCP-shaped - performs basic validity checks, and
+// returns both a full URL and just the path portion.
+func normalizeURI(p string) (*url.URL, string, error) {
+	var u *url.URL
+	var newpath string
 	if m := scpSyntaxRe.FindStringSubmatch(p); m != nil {
 		// Match SCP-like syntax and convert it to a URL.
 		// Eg, "git@github.com:user/repo" becomes
@@ -800,6 +805,7 @@ func normalizeURI(p string) (u *url.URL, newpath string, err error) {
 			//RawPath: m[3],
 		}
 	} else {
+		var err error
 		u, err = url.Parse(p)
 		if err != nil {
 			return nil, "", errors.Errorf("%q is not a valid URI", p)
@@ -814,11 +820,7 @@ func normalizeURI(p string) (u *url.URL, newpath string, err error) {
 		newpath = path.Join(u.Host, u.Path)
 	}
 
-	if !pathvld.MatchString(newpath) {
-		return nil, "", errors.Errorf("%q is not a valid import path", newpath)
-	}
-
-	return
+	return u, newpath, nil
 }
 
 // fetchMetadata fetches the remote metadata for path.

gps/deduce_test.go

@@ -348,7 +348,7 @@ var pathDeductionFixtures = map[string][]pathDeductionFixture{
 		},
 		{
 			in:   "git.launchpad.net/repo root",
-			rerr: errors.New("git.launchpad.net/repo root is not a valid path for a source on launchpad.net"),
+			rerr: errors.New("git.launchpad.net/repo root is not a valid path for a source on git.launchpad.net"),
 		},
 	},
 	"apache": {
@@ -658,6 +658,7 @@ func TestVanityDeductionSchemeMismatch(t *testing.T) {
 	cm := newSupervisor(ctx)
 	dc := newDeductionCoordinator(cm)
 	_, err := dc.deduceRootPath(ctx, "ssh://golang.org/exp")
+	// TODO(sdboyer) this is not actually the error that it should be
 	if err == nil {
 		t.Error("should have errored on scheme mismatch between input and go-get metadata")
 	}

gps/source_manager.go

@@ -539,6 +539,10 @@ func (sm *SourceMgr) DeduceProjectRoot(ip string) (ProjectRoot, error) {
 		return "", ErrSourceManagerIsReleased
 	}
 
+	if !pathvld.MatchString(ip) {
+		return "", errors.Errorf("%q is not a valid import path", ip)
+	}
+
 	pd, err := sm.deduceCoord.deduceRootPath(context.TODO(), ip)
 	return ProjectRoot(pd.root), err
 }