build-system: start adding a headless build

Right now this doesn't do a thing, but it gives us a nice target that
has far fewer dependencies and should contain enough parts to download
stuff from a divecomputer and then sync that with cloud storage.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 124 insertions, 0 deletions

diff --git a/subsurface-downloader-main.cpp b/subsurface-downloader-main.cpp
new file mode 100644
index 000000000..8a3231ce5
--- /dev/null
+++ b/subsurface-downloader-main.cpp
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0
+/* main.c */
+#include "core/downloadfromdcthread.h" // for fill_computer_list
+#include "core/errorhelper.h"
+#include "core/parse.h"
+#include "core/qthelper.h"
+#include "core/subsurfacestartup.h"
+#include "core/settings/qPref.h"
+#include "core/tag.h"
+#include "core/dive.h"
+
+#include <QApplication>
+#include <QLoggingCategory>
+#include <QStringList>
+#include <git2.h>
+
+static bool filesOnCommandLine = false;
+static void messageHandler(QtMsgType type, const QMessageLogContext &ctx, const QString &msg);
+
+int main(int argc, char **argv)
+{
+	qInstallMessageHandler(messageHandler);
+	// we always run this in verbose mode as there is no UI
+	verbose = 1;
+
+	// now let's say Hi
+	print_version();
+
+	// supporting BT makes sense when used with an iPhone and an rfcomm BT device?
+	QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true"));
+
+	int i;
+	bool no_filenames = true;
+	std::unique_ptr<QApplication> app(new QApplication(argc, argv));
+	QStringList files;
+	QStringList importedFiles;
+	QStringList arguments = QCoreApplication::arguments();
+
+	const char *default_directory = system_default_directory();
+	const char *default_filename = system_default_filename();
+	subsurface_mkdir(default_directory);
+
+	if (subsurface_user_is_root() && !force_root) {
+		printf("You are running Subsurface as root. This is not recommended.\n");
+		printf("If you insist to do so, run with option --allow_run_as_root.\n");
+		exit(0);
+	}
+	git_libgit2_init();
+	setup_system_prefs();
+	copy_prefs(&default_prefs, &prefs);
+
+	// now handle the arguments
+	for (i = 1; i < arguments.length(); i++) {
+		QString a = arguments.at(i);
+		if (a.isEmpty())
+			continue;
+		if (a.at(0) == '-') {
+			parse_argument(qPrintable(a));
+			continue;
+		}
+		if (imported) {
+			importedFiles.push_back(a);
+		} else {
+			no_filenames = false;
+			files.push_back(a);
+		}
+	}
+	fill_computer_list();
+	parse_xml_init();
+	taglist_init_global();
+
+	if (no_filenames) {
+		if (prefs.default_file_behavior == LOCAL_DEFAULT_FILE) {
+			QString defaultFile(prefs.default_filename);
+			if (!defaultFile.isEmpty())
+				files.push_back(QString(prefs.default_filename));
+		} else if (prefs.default_file_behavior == CLOUD_DEFAULT_FILE) {
+			QString cloudURL;
+			if (getCloudURL(cloudURL) == 0)
+				files.push_back(cloudURL);
+		}
+	}
+	filesOnCommandLine = !files.isEmpty() || !importedFiles.isEmpty();
+	if (!files.isEmpty())
+		qDebug() << "loading dive data from" << files;
+	print_files();
+	if (!quit) {
+		// do something
+		;
+	}
+	taglist_free(g_tag_list);
+	parse_xml_exit();
+	free((void *)default_directory);
+	free((void *)default_filename);
+
+	// Sync struct preferences to disk
+	qPref::sync();
+
+	free_prefs();
+	return 0;
+}
+
+// install this message handler primarily so that the Windows build can log to files
+void messageHandler(QtMsgType type, const QMessageLogContext &, const QString &msg)
+{
+	QByteArray localMsg = msg.toUtf8();
+	switch (type) {
+	case QtDebugMsg:
+		fprintf(stdout, "%s\n", localMsg.constData());
+		break;
+	case QtInfoMsg:
+		fprintf(stdout, "%s\n", localMsg.constData());
+		break;
+	case QtWarningMsg:
+		fprintf(stderr, "%s\n", localMsg.constData());
+		break;
+	case QtCriticalMsg:
+		fprintf(stderr, "%s\n", localMsg.constData());
+		break;
+	case QtFatalMsg:
+		fprintf(stderr, "%s\n", localMsg.constData());
+		abort();
+	}
+}