Replace uses of boost::filesystem with fs

Step two in abstracting away boost::filesystem.

To repeat this, simply run:
```
git ls-files \*.cpp \*.h | xargs sed -i 's/boost::filesystem/fs/g'
```

5 files changed, 22 insertions, 22 deletions

diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index c0cdad3b1e..23ec3ab434 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -608,7 +608,7 @@ int main(int argc, char *argv[])
 
     /// 6. Determine availability of data directory and parse bitcoin.conf
     /// - Do not call GetDataDir(true) before this step finishes
-    if (!boost::filesystem::is_directory(GetDataDir(false)))
+    if (!fs::is_directory(GetDataDir(false)))
     {
         QMessageBox::critical(0, QObject::tr(PACKAGE_NAME),
                               QObject::tr("Error: Specified data directory \"%1\" does not exist.").arg(QString::fromStdString(GetArg("-datadir", ""))));
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index bebba259d0..3a1f9b8e04 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -63,7 +63,7 @@
 #include <QFontDatabase>
 #endif
 
-static boost::filesystem::detail::utf8_codecvt_facet utf8;
+static fs::detail::utf8_codecvt_facet utf8;
 
 #if defined(Q_OS_MAC)
 extern double NSAppKitVersionNumber;
@@ -408,10 +408,10 @@ bool isObscured(QWidget *w)
 
 void openDebugLogfile()
 {
-    boost::filesystem::path pathDebug = GetDataDir() / "debug.log";
+    fs::path pathDebug = GetDataDir() / "debug.log";
 
     /* Open debug.log with the associated application */
-    if (boost::filesystem::exists(pathDebug))
+    if (fs::exists(pathDebug))
         QDesktopServices::openUrl(QUrl::fromLocalFile(boostPathToQString(pathDebug)));
 }
 
@@ -595,7 +595,7 @@ TableViewLastColumnResizingFixer::TableViewLastColumnResizingFixer(QTableView* t
 }
 
 #ifdef WIN32
-boost::filesystem::path static StartupShortcutPath()
+fs::path static StartupShortcutPath()
 {
     std::string chain = ChainNameFromCommandLine();
     if (chain == CBaseChainParams::MAIN)
@@ -608,13 +608,13 @@ boost::filesystem::path static StartupShortcutPath()
 bool GetStartOnSystemStartup()
 {
     // check for Bitcoin*.lnk
-    return boost::filesystem::exists(StartupShortcutPath());
+    return fs::exists(StartupShortcutPath());
 }
 
 bool SetStartOnSystemStartup(bool fAutoStart)
 {
     // If the shortcut exists already, remove it for updating
-    boost::filesystem::remove(StartupShortcutPath());
+    fs::remove(StartupShortcutPath());
 
     if (fAutoStart)
     {
@@ -684,9 +684,9 @@ bool SetStartOnSystemStartup(bool fAutoStart)
 // Follow the Desktop Application Autostart Spec:
 // http://standards.freedesktop.org/autostart-spec/autostart-spec-latest.html
 
-boost::filesystem::path static GetAutostartDir()
+fs::path static GetAutostartDir()
 {
-    namespace fs = boost::filesystem;
+    namespace fs = fs;
 
     char* pszConfigHome = getenv("XDG_CONFIG_HOME");
     if (pszConfigHome) return fs::path(pszConfigHome) / "autostart";
@@ -695,7 +695,7 @@ boost::filesystem::path static GetAutostartDir()
     return fs::path();
 }
 
-boost::filesystem::path static GetAutostartFilePath()
+fs::path static GetAutostartFilePath()
 {
     std::string chain = ChainNameFromCommandLine();
     if (chain == CBaseChainParams::MAIN)
@@ -705,7 +705,7 @@ boost::filesystem::path static GetAutostartFilePath()
 
 bool GetStartOnSystemStartup()
 {
-    boost::filesystem::ifstream optionFile(GetAutostartFilePath());
+    fs::ifstream optionFile(GetAutostartFilePath());
     if (!optionFile.good())
         return false;
     // Scan through file for "Hidden=true":
@@ -725,7 +725,7 @@ bool GetStartOnSystemStartup()
 bool SetStartOnSystemStartup(bool fAutoStart)
 {
     if (!fAutoStart)
-        boost::filesystem::remove(GetAutostartFilePath());
+        fs::remove(GetAutostartFilePath());
     else
     {
         char pszExePath[MAX_PATH+1];
@@ -733,9 +733,9 @@ bool SetStartOnSystemStartup(bool fAutoStart)
         if (readlink("/proc/self/exe", pszExePath, sizeof(pszExePath)-1) == -1)
             return false;
 
-        boost::filesystem::create_directories(GetAutostartDir());
+        fs::create_directories(GetAutostartDir());
 
-        boost::filesystem::ofstream optionFile(GetAutostartFilePath(), std::ios_base::out|std::ios_base::trunc);
+        fs::ofstream optionFile(GetAutostartFilePath(), std::ios_base::out|std::ios_base::trunc);
         if (!optionFile.good())
             return false;
         std::string chain = ChainNameFromCommandLine();
@@ -857,12 +857,12 @@ void setClipboard(const QString& str)
     QApplication::clipboard()->setText(str, QClipboard::Selection);
 }
 
-boost::filesystem::path qstringToBoostPath(const QString &path)
+fs::path qstringToBoostPath(const QString &path)
 {
-    return boost::filesystem::path(path.toStdString(), utf8);
+    return fs::path(path.toStdString(), utf8);
 }
 
-QString boostPathToQString(const boost::filesystem::path &path)
+QString boostPathToQString(const fs::path &path)
 {
     return QString::fromStdString(path.string(utf8));
 }
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index afe2166154..f956770156 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -182,10 +182,10 @@ namespace GUIUtil
     void restoreWindowGeometry(const QString& strSetting, const QSize &defaultSizeIn, QWidget *parent);
 
     /* Convert QString to OS specific boost path through UTF-8 */
-    boost::filesystem::path qstringToBoostPath(const QString &path);
+    fs::path qstringToBoostPath(const QString &path);
 
     /* Convert OS specific boost path to QString through UTF-8 */
-    QString boostPathToQString(const boost::filesystem::path &path);
+    QString boostPathToQString(const fs::path &path);
 
     /* Convert seconds into a QString with days, hours, mins, secs */
     QString formatDurationStr(int secs);
diff --git a/src/qt/intro.cpp b/src/qt/intro.cpp
index bafdfc917e..2a7ea0ff65 100644
--- a/src/qt/intro.cpp
+++ b/src/qt/intro.cpp
@@ -69,7 +69,7 @@ FreespaceChecker::FreespaceChecker(Intro *_intro)
 
 void FreespaceChecker::check()
 {
-    namespace fs = boost::filesystem;
+    namespace fs = fs;
     QString dataDirStr = intro->getPathToCheck();
     fs::path dataDir = GUIUtil::qstringToBoostPath(dataDirStr);
     uint64_t freeBytesAvailable = 0;
@@ -189,7 +189,7 @@ QString Intro::getDefaultDataDirectory()
 
 bool Intro::pickDataDirectory()
 {
-    namespace fs = boost::filesystem;
+    namespace fs = fs;
     QSettings settings;
     /* If data directory provided on command line, no need to look at settings
        or show a picking dialog */
diff --git a/src/qt/test/rpcnestedtests.cpp b/src/qt/test/rpcnestedtests.cpp
index 965f98db33..dada689731 100644
--- a/src/qt/test/rpcnestedtests.cpp
+++ b/src/qt/test/rpcnestedtests.cpp
@@ -155,5 +155,5 @@ void RPCNestedTests::rpcNestedTests()
     delete pblocktree;
     pblocktree = nullptr;
 
-    boost::filesystem::remove_all(boost::filesystem::path(path));
+    fs::remove_all(fs::path(path));
 }