Add support for system-level settings

In addition to the traditional per-user settings, there is now also a
system-wide settings file affecting all users. The file's platform-
specific default location can be overridden at build time.
The qbs-config tool can write these settings via the new --system
option.

[ChangeLog] Introduced the concept of system-level qbs settings

Change-Id: Ie6f675a74e96ce1fa7b2dd0712f6106071e848a6
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

3 files changed, 12 insertions, 4 deletions

diff --git a/src/app/qbs-setup-qt/commandlineparser.cpp b/src/app/qbs-setup-qt/commandlineparser.cpp
index 2559e0c0b..8444faa77 100644
--- a/src/app/qbs-setup-qt/commandlineparser.cpp
+++ b/src/app/qbs-setup-qt/commandlineparser.cpp
@@ -49,6 +49,7 @@ static QString helpOptionShort() { return QLatin1String("-h"); }
 static QString helpOptionLong() { return QLatin1String("--help"); }
 static QString detectOption() { return QLatin1String("--detect"); }
 static QString settingsDirOption() { return QLatin1String("--settings-dir"); }
+static QString systemOption() { return QLatin1String("--system"); }
 
 void CommandLineParser::parse(const QStringList &commandLine)
 {
@@ -73,6 +74,8 @@ void CommandLineParser::parse(const QStringList &commandLine)
             m_helpRequested = true;
         else if (arg == detectOption())
             m_autoDetectionMode = true;
+        else if (arg == systemOption())
+            m_settingsScope = qbs::Settings::SystemScope;
         else if (arg == settingsDirOption())
             assignOptionArgument(settingsDirOption(), m_settingsDir);
     }
@@ -107,10 +110,10 @@ QString CommandLineParser::usageString() const
 {
     QString s = Tr::tr("This tool creates qbs profiles from Qt versions.\n");
     s += Tr::tr("Usage:\n");
-    s += Tr::tr("    %1 [%2 <settings directory>] %3\n")
-            .arg(m_command, settingsDirOption(), detectOption());
-    s += Tr::tr("    %1 [%2 <settings directory>] <path to qmake> <profile name>\n")
-            .arg(m_command, settingsDirOption());
+    s += Tr::tr("    %1 [%2 <settings directory>] [%4] %3\n")
+            .arg(m_command, settingsDirOption(), detectOption(), systemOption());
+    s += Tr::tr("    %1 [%2 <settings directory>] [%4] <path to qmake> <profile name>\n")
+            .arg(m_command, settingsDirOption(), systemOption());
     s += Tr::tr("    %1 %2|%3\n").arg(m_command, helpOptionShort(), helpOptionLong());
     s += Tr::tr("The first form tries to auto-detect all known Qt versions, looking them up "
                 "via the PATH environment variable.\n");
diff --git a/src/app/qbs-setup-qt/commandlineparser.h b/src/app/qbs-setup-qt/commandlineparser.h
index 8ac1ba44d..a9ecb55c8 100644
--- a/src/app/qbs-setup-qt/commandlineparser.h
+++ b/src/app/qbs-setup-qt/commandlineparser.h
@@ -39,6 +39,8 @@
 #ifndef QBS_SETUPTOOLCHAINS_COMMANDLINEPARSER_H
 #define QBS_SETUPTOOLCHAINS_COMMANDLINEPARSER_H
 
+#include <tools/settings.h>
+
 #include <QtCore/qstringlist.h>
 
 class CommandLineParser
@@ -52,6 +54,7 @@ public:
     QString qmakePath() const { return m_qmakePath; }
     QString profileName() const { return m_profileName; }
     QString settingsDir() const { return m_settingsDir; }
+    qbs::Settings::Scope settingsScope() const { return m_settingsScope; }
 
     QString usageString() const;
 
@@ -62,6 +65,7 @@ private:
 
     bool m_helpRequested;
     bool m_autoDetectionMode;
+    qbs::Settings::Scope m_settingsScope = qbs::Settings::UserScope;
     QString m_qmakePath;
     QString m_profileName;
     QString m_settingsDir;
diff --git a/src/app/qbs-setup-qt/main.cpp b/src/app/qbs-setup-qt/main.cpp
index 55ec80582..d1bfd9614 100644
--- a/src/app/qbs-setup-qt/main.cpp
+++ b/src/app/qbs-setup-qt/main.cpp
@@ -68,6 +68,7 @@ int main(int argc, char *argv[])
         }
 
         Settings settings(clParser.settingsDir());
+        settings.setScopeForWriting(clParser.settingsScope());
 
         if (clParser.autoDetectionMode()) {
             // search all Qt's in path and dump their settings