Don't overwrite identical files on export even when FORCE is in effect.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@34116 a592a061-630c-0410-9148-cb99ea01b6c8

diff --git a/src/Exporter.cpp b/src/Exporter.cpp
index 766cb6d7bd35c99d795119001428c9ce091e3f3d..32fd07c45399f11078a21b044115c65f2804d20c 100644 (file)
--- a/src/Exporter.cpp
+++ b/src/Exporter.cpp
@@ -36,19 +36,15 @@ namespace lyx {
 
 namespace Alert = frontend::Alert;
 
-/// Ask the user what to do if the destination file already exists
-/// and is different from the source file.
-static int checkOverwrite(FileName const & src_file, FileName const & dst_file)
+/// Ask the user what to do if a file already exists
+static int checkOverwrite(FileName const & filename)
 {
-       if (!dst_file.exists())
+       if (!filename.exists())
                return 0;
 
-       if (src_file.checksum() == dst_file.checksum())
-               return -1;
-
        docstring text = bformat(_("The file %1$s already exists.\n\n"
                                   "Do you want to overwrite that file?"),
-                                  makeDisplayPath(dst_file.absFilename()));
+                                  makeDisplayPath(filename.absFilename()));
        int choice = Alert::prompt(_("Overwrite file?"),
                                text, 0, 2,
                                _("&Keep file"), _("&Overwrite"),
@@ -85,11 +81,14 @@ CopyStatus copyFile(string const & format,
        // overwrite themselves. This check could be changed to
        // boost::filesystem::equivalent(sourceFile, destFile) if export to
        // other directories than the document directory is desired.
-       if (!prefixIs(onlyPath(sourceFile.absFilename()), package().temp_dir().absFilename()))
+       // Also don't overwrite files that already exist and are identical
+       // to the source files.
+       if (!prefixIs(onlyPath(sourceFile.absFilename()), package().temp_dir().absFilename())
+           || sourceFile.checksum() == destFile.checksum())
                return ret;
 
        if (!force) {
-               switch(checkOverwrite(sourceFile, destFile)) {
+               switch(checkOverwrite(destFile)) {
                case -1:
                        return SUCCESS;
                case 0: