updater: add a way to manually test updater command line

Without this hack it is not possible to debug the updater invocation easily.
Each time this code will be called the updater would be executed and an update
directory already present.

Change-Id: I1159ee504b8f4ebf211e2a719369a48ae2e32345
Reviewed-on: https://gerrit.libreoffice.org/39080Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

desktop/source/app/app.cxx

@@ -1465,7 +1465,8 @@ int Desktop::Main()
             return EXIT_FAILURE;
 
 #if HAVE_FEATURE_UPDATE_MAR
-        if (officecfg::Office::Update::Update::Enabled::get())
+        const char* pUpdaterTestReplace = std::getenv("LIBO_UPDATER_TEST_REPLACE");
+        if (pUpdaterTestReplace || officecfg::Office::Update::Update::Enabled::get())
         {
             // check if we just updated
             bool bUpdateRunning = officecfg::Office::Update::Update::UpdateRunning::get();
@@ -1507,7 +1508,7 @@ int Desktop::Main()
             osl::DirectoryItem aDirectoryItem;
             osl::DirectoryItem::get(Updater::getUpdateDirURL(), aDirectoryItem);
 
-            if (aPatchInfo.is() && aDirectoryItem.is())
+            if (pUpdaterTestReplace || (aPatchInfo.is() && aDirectoryItem.is()))
             {
                 OUString aBuildID("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":buildid}");
                 rtl::Bootstrap::expandMacros(aBuildID);

desktop/source/app/updater.cxx

@@ -86,8 +86,6 @@ OUString normalizePath(const OUString& rPath)
         aPath = aTempPath.copy(0, i) + aPath.copy(nIndex + 3);
     }
 
-    SAL_DEBUG(aPath);
-
     return aPath;
 }
 
@@ -267,13 +265,24 @@ void update()
 
 
 #if UNX
-    if (execv(aPath.getStr(), pArgs))
+    const char* pUpdaterTestReplace = std::getenv("LIBO_UPDATER_TEST_REPLACE");
+    if (!pUpdaterTestReplace)
+    {
+        if (execv(aPath.getStr(), pArgs))
+        {
+            printf("execv failed with error %d %s\n",errno,strerror(errno));
+        }
+    }
+    else
     {
-        printf("execv failed with error %d %s\n",errno,strerror(errno));
+        for (size_t i = 0; i < 8 + rtl_getAppCommandArgCount(); ++i)
+        {
+            SAL_WARN("desktop.updater", pArgs[i]);
+        }
     }
 #endif
 
-    for (size_t i = 0; i < 8; ++i)
+    for (size_t i = 0; i < 8 + rtl_getAppCommandArgCount(); ++i)
     {
         delete[] pArgs[i];
     }