[PATCH 18/41] robocopy: add clear destination folder flag (/PURGE)

[Florian Eder]

Implements the /PURGE switch, which clears the destination directory
and removes any extra files

Signed-off-by: Florian Eder <others.meder at gmail.com>
---
 programs/robocopy/main.c      | 29 +++++++++++++++++++++++++++++
 programs/robocopy/robocopy.h  |  5 +++++
 programs/robocopy/robocopy.rc |  4 ++++
 3 files changed, 38 insertions(+)

diff --git a/programs/robocopy/main.c b/programs/robocopy/main.c
index 2d4195daaec..0bb0e83783c 100644
--- a/programs/robocopy/main.c
+++ b/programs/robocopy/main.c
@@ -157,6 +157,11 @@ static void parse_arguments(int argc, WCHAR *argv[])
                 if (!options.user_limited_subdirectories_depth)
                     options.max_subdirectories_depth = 0;
             }
+            /* purge - Purge Destination */
+            else if (!wcsicmp(argv[i], L"/purge"))
+            {
+                options.purge_destination = TRUE;
+            }
             /* mov - Delete files (but not folders) after copying them */
             else if (!wcsicmp(argv[i], L"/mov"))
             {
@@ -389,6 +394,26 @@ static BOOL perform_copy(struct robocopy_statistics *statistics)
         }
         if (found) continue;
         else statistics->extra_files = TRUE;
+
+        /* if purge is specified (and xx is not set), we delete the (non-excluded) extra files and folders from the destination */
+        if (options.purge_destination)
+        {
+            current_absolute_path = get_combined_path(options.destination, current_path->name);
+            /* only files or empty folders */
+            if (!PathIsDirectoryW(current_absolute_path))
+            {
+                if (!DeleteFileW(current_absolute_path))
+                    output_error(STRING_ERROR_DELETE_FILE, GetLastError(), strip_path_prefix(current_absolute_path));
+                else output_message(STRING_DELETE_FILE, strip_path_prefix(current_absolute_path));
+            }
+            else if (PathIsDirectoryEmptyW(current_absolute_path))
+            {
+                if (!RemoveDirectoryW(current_absolute_path))
+                    output_error(STRING_ERROR_DELETE_DIRECTORY, GetLastError(), strip_path_prefix(current_absolute_path));
+                else output_message(STRING_DELETE_DIRECTORY, strip_path_prefix(current_absolute_path));
+            }
+        }
+        else break; /* if purge's not set, we can just break LIST_FOR_EACH_ENTRY, no need to check further */
     }
 
     return TRUE;
@@ -416,6 +441,10 @@ static WCHAR *get_option_string(void)
     if (options.copy_empty_subdirectories)
         wcscat(temp_string, L"/E ");
 
+    /* Purge */
+    if (options.purge_destination)
+        wcscat(temp_string, L"/PURGE ");
+
     /* Move files */
     if (options.purge_source_files)
         wcscat(temp_string, L"/MOV ");
diff --git a/programs/robocopy/robocopy.h b/programs/robocopy/robocopy.h
index 677f88cb453..1417f8b0e1c 100644
--- a/programs/robocopy/robocopy.h
+++ b/programs/robocopy/robocopy.h
@@ -40,6 +40,7 @@ struct robocopy_options {
     BOOL copy_subdirectories;
     BOOL copy_empty_subdirectories;
     BOOL purge_source_files;
+    BOOL purge_destination;
 };
 
 struct robocopy_statistics {
@@ -65,7 +66,11 @@ struct robocopy_statistics {
 #define STRING_ERROR_READ_DIRECTORY           1011
 #define STRING_ERROR_WRITE_DIRECTORY          1012
 #define STRING_ERROR_WRITE_FILE               1014
+#define STRING_ERROR_DELETE_DIRECTORY         1016
+#define STRING_ERROR_DELETE_FILE              1017
 #define STRING_STATISTICS                     1018
 #define STRING_CREATE_DIRECTORY               1019
+#define STRING_DELETE_DIRECTORY               1020
 #define STRING_CREATE_FILE                    1022
+#define STRING_DELETE_FILE                    1023
 #define STRING_MOVE_FILE                      1024
\ No newline at end of file
diff --git a/programs/robocopy/robocopy.rc b/programs/robocopy/robocopy.rc
index b12501017e2..cdb03085315 100644
--- a/programs/robocopy/robocopy.rc
+++ b/programs/robocopy/robocopy.rc
@@ -35,9 +35,13 @@ STRINGTABLE
     STRING_ERROR_READ_DIRECTORY, "[%1] Error %2 (%3) occurred reading directory \"%4\":\n%5\n"
     STRING_ERROR_WRITE_DIRECTORY, "[%1] Error %2 (%3) occurred writing directory \"%4\":\n%5\n"
     STRING_ERROR_WRITE_FILE, "[%1] Error %2 (%3) occurred writing file \"%4\":\n%5\n"
+    STRING_ERROR_DELETE_DIRECTORY, "[%1] Error %2 (%3) occurred deleting directory \"%4\":\n%5\n"
+    STRING_ERROR_DELETE_FILE, "[%1] Error %2 (%3) occurred deleting file \"%4\":\n%5\n"
     STRING_STATISTICS, "\n Copied %1 directories and %2 files\n"
     STRING_CREATE_DIRECTORY, " Created Dir: %1\n"
+    STRING_DELETE_DIRECTORY, " Deleted Dir: %1\n"
     STRING_CREATE_FILE, " Copied File: %1\n"
+    STRING_DELETE_FILE, " Deleted File: %1\n"
     STRING_MOVE_FILE, "  Moved File: %1\n"
 }
 
-- 
2.32.0