subsurface-startup: expose print_version() in the header

The Windows auto-verbose + log file creation if starting
from a non-terminal has the problem that the print_version()
call is never made becase 'verbose' is updated programatically
in windows.c and not by the user (by passing -v).

To work around the issue:
- move the windows console creation call before *everything* else
- then immediatelly install the message handler
- then see if 'verbose' is set and explicitly call print_version()

print_version() now also has a flag (version_printed), to avoid
printing the version multiple times, if the user decided to add
an extra -v to the Desktop shortcut.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>

core/subsurfacestartup.c

@@ -148,14 +148,18 @@ const char *monthname(int mon)
  */
 bool imported = false;
 
-static void print_version()
+bool version_printed = false;
+void print_version()
 {
+	if (version_printed)
+		return;
 	printf("Subsurface v%s,\n", subsurface_git_version());
 	printf("built with libdivecomputer v%s\n", dc_version(NULL));
 	print_qt_versions();
 	int git_maj, git_min, git_rev;
 	git_libgit2_version(&git_maj, &git_min, &git_rev);
 	printf("built with libgit2 %d.%d.%d\n", git_maj, git_min, git_rev);
+	version_printed = true;
 }
 
 void print_files()

core/subsurfacestartup.h

@@ -19,6 +19,7 @@ void parse_argument(const char *arg);
 void free_prefs(void);
 void copy_prefs(struct preferences *src, struct preferences *dest);
 void print_files(void);
+void print_version(void);
 
 extern char *settings_suffix;
 

subsurface-desktop-main.cpp

@@ -33,18 +33,20 @@ static void messageHandler(QtMsgType type, const QMessageLogContext &ctx, const
 
 int main(int argc, char **argv)
 {
+	subsurface_console_init();
+	qInstallMessageHandler(messageHandler);
+	if (verbose) /* print the version if the Win32 console_init() code enabled verbose. */
+		print_version();
+
 	int i;
 	bool no_filenames = true;
 	QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true"));
-	qInstallMessageHandler(messageHandler);
 	QApplication *application = new QApplication(argc, argv);
 	(void)application;
 	QStringList files;
 	QStringList importedFiles;
 	QStringList arguments = QCoreApplication::arguments();
 
-	subsurface_console_init();
-
 	const char *default_directory = system_default_directory();
 	const char *default_filename = system_default_filename();
 	subsurface_mkdir(default_directory);