Add NSIS 'log' plugin

1 files changed, 111 insertions, 0 deletions

diff --git a/windows/nsis-plugins/src/log/logger.cpp b/windows/nsis-plugins/src/log/logger.cpp
new file mode 100644
index 0000000000..f22bf84bf1
--- /dev/null
+++ b/windows/nsis-plugins/src/log/logger.cpp
@@ -0,0 +1,111 @@
+#include "stdafx.h"
+#include "logger.h"
+#include <libcommon/error.h>
+#include <libcommon/string.h>
+#include <sstream>
+#include <iomanip>
+
+AnsiFileLogSink::AnsiFileLogSink(const std::wstring &file, bool append, bool flush)
+	: m_flush(flush)
+{
+	const DWORD creationDisposition = (append ? OPEN_ALWAYS : CREATE_ALWAYS);
+
+	m_logfile = CreateFileW(file.c_str(), GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, nullptr,
+		creationDisposition, FILE_ATTRIBUTE_NORMAL, nullptr);
+
+	THROW_GLE_IF(INVALID_HANDLE_VALUE, m_logfile, "Open/create log file");
+
+	if (append && ERROR_ALREADY_EXISTS == GetLastError())
+	{
+		LARGE_INTEGER offset = { 0 };
+
+		const auto seekStatus = SetFilePointerEx(m_logfile, offset, nullptr, FILE_END);
+
+		THROW_GLE_IF(FALSE, seekStatus, "Seek to end offset in existing log file");
+	}
+}
+
+AnsiFileLogSink::~AnsiFileLogSink()
+{
+	CloseHandle(m_logfile);
+}
+
+void AnsiFileLogSink::log(const std::wstring &message)
+{
+	auto ansi = common::string::ToAnsi(message);
+
+	ansi.append("\xd\xa");
+
+	DWORD bytesWritten;
+
+	WriteFile(m_logfile, ansi.c_str(), ansi.size(), &bytesWritten, nullptr);
+
+	if (m_flush)
+	{
+		FlushFileBuffers(m_logfile);
+	}
+}
+
+void Logger::log(const std::wstring &message)
+{
+	m_logsink->log(Compose(message, Timestamp(), ordinal()));
+}
+
+void Logger::log(const std::wstring &message, const std::vector<std::wstring> &details)
+{
+	const auto timestamp = this->Timestamp();
+	const auto ordinal = this->ordinal();
+
+	m_logsink->log(Compose(message, timestamp, ordinal));
+
+	//
+	// Write details with indentation.
+	//
+	for (const auto detail : details)
+	{
+		m_logsink->log(Compose(detail, timestamp, ordinal, 4));
+	}
+}
+
+// static
+std::wstring Logger::Timestamp()
+{
+	SYSTEMTIME time;
+
+	GetLocalTime(&time);
+
+	std::wstringstream ss;
+
+	ss << L'['
+		<< std::right << std::setw(2) << std::setfill(L'0') << time.wHour
+		<< L':'
+		<< std::right << std::setw(2) << std::setfill(L'0') << time.wMinute
+		<< L':'
+		<< std::right << std::setw(2) << std::setfill(L'0') << time.wSecond
+		<< L']';
+
+	return ss.str();
+}
+
+std::wstring Logger::ordinal()
+{
+	std::wstringstream ss;
+
+	ss << std::right << std::setw(4) << std::setfill(L' ') << m_ordinal++;
+
+	return ss.str();
+}
+
+//static
+std::wstring Logger::Compose(const std::wstring &message, const std::wstring &timestamp,
+	const std::wstring &ordinal, size_t indentation)
+{
+	std::wstringstream ss;
+
+	ss << timestamp << L' '
+		<< ordinal << L' '
+		<< std::wstring(indentation, L' ')
+		<< message;
+
+	return ss.str();
+}