Function readCapacitorAppID

internal/cli/quickstart_detect.go:612–642

readCapacitorAppID reads the "appId" field from capacitor.config.json or capacitor.config.ts in dir. Capacitor v3+ defaults to the TypeScript config. Returns empty string if neither file is present or the field is missing.

(dir string)

// capacitor.config.ts in dir. Capacitor v3+ defaults to the TypeScript config.
// Returns empty string if neither file is present or the field is missing.
func readCapacitorAppID(dir string) string {
	// Try JSON config first (Capacitor v2 and v3+ both support it).
	if data, err := os.ReadFile(filepath.Join(dir, "capacitor.config.json")); err == nil {
		var cfg struct {
			AppID string `json:"appId"`
		}
		if jsonErr := json.Unmarshal(data, &cfg); jsonErr == nil && cfg.AppID != "" {
			return cfg.AppID
		}
	}
	// Fall back to TypeScript config (Capacitor v3+ default).
	// Process line-by-line to skip comment lines that may contain an appId value
	// (e.g. "// appId: 'old.value'") which would otherwise be matched first.
	if data, err := os.ReadFile(filepath.Join(dir, "capacitor.config.ts")); err == nil {
		for _, line := range strings.Split(string(data), "\n") {
			if strings.HasPrefix(strings.TrimSpace(line), "//") {
				continue
			}
			if m := capacitorTSAppIDRegex.FindStringSubmatch(line); len(m) >= 3 {
				// M[1] = single-quoted match, m[2] = double-quoted match.
				if m[1] != "" {
					return m[1]
				}
				if m[2] != "" {
					return m[2]
				}
			}
		}
	}
	return ""
}

// readDotnetMobileBundleID extracts the <ApplicationId> element from .csproj content.
// Used for MAUI and .NET Mobile apps to generate callback URL guidance.