Add utility method to resolve symlinks

The same logic block to resolve possible symlinks exists in 5 different
places now. This change moves this duplicated code to a static member
function of WX_FILENAME instead.

common/wx_filename.cpp

@@ -22,6 +22,7 @@
  */
 
 #include <wx_filename.h>
+#include <macros.h>
 
 
 WX_FILENAME::WX_FILENAME( const wxString& aPath, const wxString& aFilename )
@@ -78,4 +79,19 @@ long long WX_FILENAME::GetTimestamp()
         return m_fn.GetModificationTime().GetValue().GetValue();
 
     return 0;
-}
+}
+
+// Resolve possible symlink(s) in aFileName to an absolute path
+void WX_FILENAME::ResolvePossibleSymlinks( wxFileName& aFilename )
+{
+#ifndef __WINDOWS__
+    if( aFilename.Exists( wxFILE_EXISTS_SYMLINK ) )
+    {
+        char buffer[PATH_MAX];
+        char* realPath = realpath( TO_UTF8( aFilename.GetFullPath() ), buffer );
+
+        if( realPath )
+            aFilename.Assign( wxString::FromUTF8( realPath ) );
+    }
+#endif
+}

eeschema/files-io.cpp

@@ -61,6 +61,7 @@
 #include <tools/ee_actions.h>
 #include <tools/ee_inspection_tool.h>
 #include <paths.h>
+#include <wx_filename.h>  // For ::ResolvePossibleSymlinks
 
 bool SCH_EDIT_FRAME::SaveEEFile( SCH_SHEET* aSheet, bool aSaveUnderNewName )
 {
@@ -109,17 +110,8 @@ bool SCH_EDIT_FRAME::SaveEEFile( SCH_SHEET* aSheet, bool aSaveUnderNewName )
             schematicFileName.SetExt( KiCadSchematicFileExtension );
     }
 
-#ifndef __WINDOWS__
     // Write through symlinks, don't replace them
-    if( schematicFileName.Exists( wxFILE_EXISTS_SYMLINK ) )
-    {
-        char buffer[ PATH_MAX ];
-        char *realPath = realpath( TO_UTF8( schematicFileName.GetFullPath() ), buffer );
-
-        if( realPath )
-            schematicFileName.Assign( wxString::FromUTF8( realPath ) );
-    }
-#endif
+    WX_FILENAME::ResolvePossibleSymlinks( schematicFileName );
 
     if( !IsWritable( schematicFileName ) )
         return false;

eeschema/sch_plugins/kicad/sch_sexpr_plugin.cpp

@@ -61,6 +61,7 @@
 #include <symbol_lib_table.h>  // for PropPowerSymsOnly definintion.
 #include <ee_selection.h>
 #include <kicad_string.h>
+#include <wx_filename.h>       // for ::ResolvePossibleSymlinks()
 
 
 using namespace TSCHEMATIC_T;
@@ -1380,18 +1381,7 @@ SCH_SEXPR_PLUGIN_CACHE::~SCH_SEXPR_PLUGIN_CACHE()
 wxFileName SCH_SEXPR_PLUGIN_CACHE::GetRealFile() const
 {
     wxFileName fn( m_libFileName );
-
-#ifndef __WINDOWS__
-    if( fn.Exists( wxFILE_EXISTS_SYMLINK ) )
-    {
-        char buffer[ PATH_MAX ];
-        char *realPath = realpath( TO_UTF8( fn.GetFullPath() ), buffer );
-
-        if( realPath )
-            fn.Assign( wxString::FromUTF8( realPath ) );
-    }
-#endif
-
+    WX_FILENAME::ResolvePossibleSymlinks( fn );
     return fn;
 }
 

eeschema/sch_plugins/legacy/sch_legacy_plugin.cpp

@@ -73,6 +73,7 @@
 #include <confirm.h>
 #include <tool/selection.h>
 #include <default_values.h>    // For some default values
+#include <wx_filename.h>       // For ::ResolvePossibleSymlinks()
 
 
 #define Mils2Iu( x ) Mils2iu( x )
@@ -2437,18 +2438,7 @@ SCH_LEGACY_PLUGIN_CACHE::~SCH_LEGACY_PLUGIN_CACHE()
 wxFileName SCH_LEGACY_PLUGIN_CACHE::GetRealFile() const
 {
     wxFileName fn( m_libFileName );
-
-#ifndef __WINDOWS__
-    if( fn.Exists( wxFILE_EXISTS_SYMLINK ) )
-    {
-        char buffer[ PATH_MAX ];
-        char *realPath = realpath( TO_UTF8( fn.GetFullPath() ), buffer );
-
-        if( realPath )
-            fn.Assign( wxString::FromUTF8( realPath ) );
-    }
-#endif
-
+    WX_FILENAME::ResolvePossibleSymlinks( fn );
     return fn;
 }
 

include/wx_filename.h

@@ -48,6 +48,9 @@ public:
     // Avoid multiple calls to stat() on POSIX kernels.
     long long GetTimestamp();
 
+    // Resolve possible symlink(s) to absolute path
+    static void ResolvePossibleSymlinks( wxFileName& aFilename );
+
 private:
     // Write cached values to the wrapped wxFileName.  MUST be called before using m_fn.
     void resolve();

pcbnew/files.cpp

@@ -60,6 +60,7 @@
 #include <tool/tool_manager.h>
 #include <tools/pcb_actions.h>
 #include "footprint_info_impl.h"
+#include <wx_filename.h>  // For ::ResolvePossibleSymlinks()
 
 #include <wx/wupdlock.h>
 #include <wx/filedlg.h>
@@ -943,17 +944,8 @@ bool PCB_EDIT_FRAME::SavePcbFile( const wxString& aFileName, bool addToHistory,
     if( pcbFileName.GetExt() == LegacyPcbFileExtension )
         pcbFileName.SetExt( KiCadPcbFileExtension );
 
-#ifndef __WINDOWS__
     // Write through symlinks, don't replace them
-    if( pcbFileName.Exists( wxFILE_EXISTS_SYMLINK ) )
-    {
-        char buffer[ PATH_MAX ];
-        char *realPath = realpath( TO_UTF8( pcbFileName.GetFullPath() ), buffer );
-
-        if( realPath )
-            pcbFileName.Assign( wxString::FromUTF8( realPath ) );
-    }
-#endif
+    WX_FILENAME::ResolvePossibleSymlinks( pcbFileName );
 
     if( !IsWritable( pcbFileName ) )
     {

pcbnew/plugins/kicad/kicad_plugin.cpp

@@ -2407,17 +2407,8 @@ void PCB_IO::FootprintSave( const wxString& aLibraryPath, const FOOTPRINT* aFoot
     wxFileName fn( aLibraryPath, aFootprint->GetFPID().GetLibItemName(),
                    KiCadFootprintFileExtension );
 
-#ifndef __WINDOWS__
     // Write through symlinks, don't replace them
-    if( fn.Exists( wxFILE_EXISTS_SYMLINK ) )
-    {
-        char buffer[ PATH_MAX ];
-        char *realPath = realpath( TO_UTF8( fn.GetFullPath() ), buffer );
-
-        if( realPath )
-            fn.Assign( wxString::FromUTF8( realPath ) );
-    }
-#endif
+    WX_FILENAME::ResolvePossibleSymlinks( fn );
 
     if( !fn.IsOk() )
     {