allow to migrate the shared registrymodifications.xcu

LO-3.3 and older wrote configuration into many files under
user/registry/data. LO-3.4 spped up startup by moving these
files into a single /user/registrymodifications.xcu.

officecfg/registry/data/org/openoffice/Setup.xcu defines what registry
nodes are migrated and what are excluded.

Finally, the old migration code detected the name of the .xcu file
by the first entry in IncludedNodes. This fix allows to search
the data in the single registrymodifications.xcu when available.

1 files changed, 40 insertions, 22 deletions

diff --git a/desktop/source/migration/migration.cxx b/desktop/source/migration/migration.cxx
index 7520eb8f58bd..d7f9765d05c6 100644
--- a/desktop/source/migration/migration.cxx
+++ b/desktop/source/migration/migration.cxx
@@ -773,33 +773,51 @@ void MigrationImpl::copyConfig() {
             }
         }
     }
+
+    // check if the shared registrymodifications.xcu file exists
+    bool bRegistryModificationsXcuExists = false;
+    rtl::OUString regFilePath(m_aInfo.userdata);
+    regFilePath += ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("/user/registrymodifications.xcu"));
+    File regFile(regFilePath);
+    ::osl::FileBase::RC nError = regFile.open(osl_File_OpenFlag_Read);
+    if ( nError == ::osl::FileBase::E_None ) {
+        bRegistryModificationsXcuExists = true;
+        regFile.close();
+    }
+
     for (Components::const_iterator i(comps.begin()); i != comps.end(); ++i) {
         if (!i->second.includedPaths.empty()) {
-            rtl::OUStringBuffer buf(m_aInfo.userdata);
-            buf.appendAscii(RTL_CONSTASCII_STRINGPARAM("/user/registry/data"));
-            sal_Int32 n = 0;
-            do {
-                rtl::OUString seg(i->first.getToken(0, '.', n));
-                rtl::OUString enc(
-                    rtl::Uri::encode(
-                        seg, rtl_UriCharClassPchar, rtl_UriEncodeStrict,
-                        RTL_TEXTENCODING_UTF8));
-                if (enc.getLength() == 0 && seg.getLength() != 0) {
-                    OSL_TRACE(
-                        ("configuration migration component %s ignored (cannot"
-                         " be encoded as file path)"),
-                        rtl::OUStringToOString(
-                            i->first, RTL_TEXTENCODING_UTF8).getStr());
-                    goto next;
-                }
-                buf.append(sal_Unicode('/'));
-                buf.append(enc);
-            } while (n >= 0);
-            buf.appendAscii(RTL_CONSTASCII_STRINGPARAM(".xcu"));
+            if (!bRegistryModificationsXcuExists) {
+                // shared registrymodifications.xcu does not exists
+                // the configuration is split in many registry files
+                // determine the file names from the first element in included paths
+                rtl::OUStringBuffer buf(m_aInfo.userdata);
+                buf.appendAscii(RTL_CONSTASCII_STRINGPARAM("/user/registry/data"));
+                sal_Int32 n = 0;
+                do {
+                    rtl::OUString seg(i->first.getToken(0, '.', n));
+                    rtl::OUString enc(
+                        rtl::Uri::encode(
+                            seg, rtl_UriCharClassPchar, rtl_UriEncodeStrict,
+                            RTL_TEXTENCODING_UTF8));
+                    if (enc.getLength() == 0 && seg.getLength() != 0) {
+                        OSL_TRACE(
+                            ("configuration migration component %s ignored (cannot"
+                            " be encoded as file path)"),
+                            rtl::OUStringToOString(
+                                i->first, RTL_TEXTENCODING_UTF8).getStr());
+                        goto next;
+                    }
+                    buf.append(sal_Unicode('/'));
+                    buf.append(enc);
+                } while (n >= 0);
+                buf.appendAscii(RTL_CONSTASCII_STRINGPARAM(".xcu"));
+                regFilePath = buf.toString();
+            }
             configuration::Update::get(
                 comphelper::getProcessComponentContext())->
                 insertModificationXcuFile(
-                    buf.makeStringAndClear(), setToSeq(i->second.includedPaths),
+                    regFilePath, setToSeq(i->second.includedPaths),
                     setToSeq(i->second.excludedPaths));
         } else {
             OSL_TRACE(