1 files changed, 49 insertions, 0 deletions
diff --git a/xpcom/base/LogCommandLineHandler.h b/xpcom/base/LogCommandLineHandler.h
new file mode 100644
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+++ b/xpcom/base/LogCommandLineHandler.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef LogCommandLineHandler_h
+#define LogCommandLineHandler_h
+
+#include <functional>
+#include "nsString.h"
+
+namespace mozilla {
+
+/**
+ * A helper function parsing provided command line arguments and handling two
+ * specific args:
+ *
+ * -MOZ_LOG=modulelist
+ * -MOZ_LOG_FILE=file/path
+ *
+ * both expecting an argument, and corresponding to the same-name environment
+ * variables we use for logging setup.
+ *
+ * When an argument is found in the proper form, the consumer callback is called
+ * with a string in a follwing form, note that we do this for every occurence,
+ * and not just at the end of the parsing:
+ *
+ * "MOZ_LOG=modulelist" or "MOZ_LOG_FILE=file/path"
+ *
+ * All the following forms of arguments of the application are possible:
+ *
+ * --MOZ_LOG modulelist
+ * -MOZ_LOG modulelist
+ * --MOZ_LOG=modulelist
+ * -MOZ_LOG=modulelist
+ *
+ * The motivation for a separte function and not implementing a command line
+ * handler interface is that we need to process this very early during the
+ * application startup.  Command line handlers are proccessed way later
+ * after logging has already been set up.
+ */
+void LoggingHandleCommandLineArgs(
+    int argc, char const* const* argv,
+    std::function<void(nsACString const&)> const& consumer);
+
+}  // namespace mozilla
+
+#endif