[PATCH] kernel-shark: Provide parsing for quotation marks in Record command line

["Yordan Karadzhov (VMware)" <y.karadz@gmail.com>]

Shell-like parsing of quotation marks in the content of the "Command"
field of the "Record" dialog will give more options to the users.
For example, now we can trace

 python -c 'print("hello world")'

Suggested-by: Stephen Brennan <stephen@brennan.io>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204679
Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
---
 kernel-shark/src/KsCaptureDialog.cpp | 38 ++++++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/kernel-shark/src/KsCaptureDialog.cpp b/kernel-shark/src/KsCaptureDialog.cpp
index dc1e9b2..b3393b6 100644
--- a/kernel-shark/src/KsCaptureDialog.cpp
+++ b/kernel-shark/src/KsCaptureDialog.cpp
@@ -157,7 +157,9 @@ KsCaptureControl::KsCaptureControl(QWidget *parent)
  */
 QStringList KsCaptureControl::getArgs()
 {
+	QString::SplitBehavior opt = QString::SkipEmptyParts;
 	QStringList argv;
+	QString cmdTmp;
 
 	argv << "record";
 
@@ -170,7 +172,36 @@ QStringList KsCaptureControl::getArgs()
 		argv << _eventsWidget.getCheckedEvents(true);
 
 	argv << "-o" << outputFileName();
-	argv << _commandLineEdit.text().split(" ");
+
+	cmdTmp = _commandLineEdit.text();
+	if (!cmdTmp.contains('\'') && !cmdTmp.contains('\"')) {
+		/* Split all command line arguments. */
+		argv << cmdTmp.split(" ", opt);
+	} else {
+		int iOpenQuots, iCloseQuots, size = cmdTmp.size();
+		int iSingleQuots = (cmdTmp.count('\'') == 2) ? cmdTmp.indexOf('\'') : size;
+		int iDoubleQuots = (cmdTmp.count('\"') == 2) ? cmdTmp.indexOf('\"') : size;
+
+		if (iSingleQuots < iDoubleQuots) {
+			iOpenQuots = iSingleQuots;
+			iCloseQuots = cmdTmp.lastIndexOf('\'') + 1;
+		} else if (iDoubleQuots < iSingleQuots) {
+			iOpenQuots = iDoubleQuots;
+			iCloseQuots = cmdTmp.lastIndexOf('\"') + 1;
+		} else {
+			emit print("\nERROR: Unable to parse the command.");
+			return {};
+		}
+
+		/* Split the arguments. */
+		argv << cmdTmp.left(iOpenQuots).split(" ", opt);
+
+		/* Everything in between the quotation marks goes in one piece. */
+		argv << cmdTmp.mid(iOpenQuots, iCloseQuots - iOpenQuots);
+
+		/* Split the rest of the arguments. */
+		argv << cmdTmp.right(size - iCloseQuots).split(" ", opt);
+	}
 
 	return argv;
 }
@@ -350,7 +381,10 @@ void KsCaptureControl::_browse()
 
 void KsCaptureControl::_apply()
 {
-	emit argsReady(getArgs().join(" "));
+	QStringList argv = getArgs();
+
+	if (argv.count())
+		emit argsReady(argv.join(" "));
 }
 
 /** @brief Create KsCaptureMonitor widget. */
-- 
2.20.1