cmd/stcrashreceiver: Correct parsing of current version string

cmd/stcrashreceiver/sentry.go

@@ -215,7 +215,13 @@ func crashReportFingerprint(message string) []string {
 }
 
 // syncthing v1.1.4-rc.1+30-g6aaae618-dirty-crashrep "Erbium Earthworm" (go1.12.5 darwin-amd64) [email protected] 2019-05-23 16:08:14 UTC [foo, bar]
-var longVersionRE = regexp.MustCompile(`syncthing\s+(v[^\s]+)\s+"([^"]+)"\s\(([^\s]+)\s+([^-]+)-([^)]+)\)\s+([^\s]+)[^\[]*(?:\[(.+)\])?$`)
+// or, somewhere along the way the "+" in the version tag disappeared:
+// syncthing v1.23.7-dev.26.gdf7b56ae.dirty-stversionextra "Fermium Flea" (go1.20.5 darwin-arm64) [email protected] 2023-07-12 06:55:26 UTC [Some Wrapper, purego, stnoupgrade]
+var (
+	longVersionRE = regexp.MustCompile(`syncthing\s+(v[^\s]+)\s+"([^"]+)"\s\(([^\s]+)\s+([^-]+)-([^)]+)\)\s+([^\s]+)[^\[]*(?:\[(.+)\])?$`)
+	gitExtraRE    = regexp.MustCompile(`\.\d+\.g[0-9a-f]+`) // ".1.g6aaae618"
+	gitExtraSepRE = regexp.MustCompile(`[.-]`)              // dot or dash
+)
 
 type version struct {
 	version  string   // "v1.1.4-rc.1+30-g6aaae618-dirty-crashrep"
@@ -257,10 +263,21 @@ func parseVersion(line string) (version, error) {
 		builder:  m[6],
 	}
 
-	parts := strings.Split(v.version, "+")
+	// Split the version tag into tag and commit. This is old style
+	// v1.2.3-something.4+11-g12345678 or newer with just dots
+	// v1.2.3-something.4.11.g12345678 or v1.2.3-dev.11.g12345678.
+	parts := []string{v.version}
+	if strings.Contains(v.version, "+") {
+		parts = strings.Split(v.version, "+")
+	} else {
+		idxs := gitExtraRE.FindStringIndex(v.version)
+		if len(idxs) > 0 {
+			parts = []string{v.version[:idxs[0]], v.version[idxs[0]+1:]}
+		}
+	}
 	v.tag = parts[0]
 	if len(parts) > 1 {
-		fields := strings.Split(parts[1], "-")
+		fields := gitExtraSepRE.Split(parts[1], -1)
 		if len(fields) >= 2 && strings.HasPrefix(fields[1], "g") {
 			v.commit = fields[1][1:]
 		}

cmd/stcrashreceiver/sentry_test.go

@@ -44,6 +44,20 @@ func TestParseVersion(t *testing.T) {
 				extra:    []string{"foo", "bar"},
 			},
 		},
+		{
+			longVersion: `syncthing v1.23.7-dev.26.gdf7b56ae-stversionextra "Fermium Flea" (go1.20.5 darwin-arm64) [email protected] 2023-07-12 06:55:26 UTC [Some Wrapper, purego, stnoupgrade]`,
+			parsed: version{
+				version:  "v1.23.7-dev.26.gdf7b56ae-stversionextra",
+				tag:      "v1.23.7-dev",
+				commit:   "df7b56ae",
+				codename: "Fermium Flea",
+				runtime:  "go1.20.5",
+				goos:     "darwin",
+				goarch:   "arm64",
+				builder:  "[email protected]",
+				extra:    []string{"Some Wrapper", "purego", "stnoupgrade"},
+			},
+		},
 	}
 
 	for _, tc := range cases {