Matt's --source-backup option.

[rsync/rsync-patches.git] / source-backup.diff

This patch to rsync 2.6.9 adds a --source-backup option that backs up source
files removed due to --remove-source-files.  In my limited testing, it seems
to work.

To use this patch, run these commands for a successful build:

    patch -p1 <patches/source-backup.diff
    ./configure                         (optional if already run)
    make

-- Matt McCutchen <hashproduct@gmail.com>

--- old/options.c
+++ new/options.c
@@ -29,6 +29,7 @@ extern struct filter_list_struct filter_
 extern struct filter_list_struct server_filter_list;
 
 int make_backups = 0;
+int make_source_backups = 0;
 
 /**
  * If 1, send the whole file as literal data rather than trying to
@@ -350,6 +351,7 @@ void usage(enum logcode F)
   rprintf(F,"     --existing              skip creating new files on receiver\n");
   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
+  rprintf(F,"     --source-backup         ... and backs up those files\n");
   rprintf(F,"     --del                   an alias for --delete-during\n");
   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
@@ -559,6 +561,7 @@ static struct poptOption long_options[] 
   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
   {"bwlimit",          0,  POPT_ARG_INT,    &bwlimit, 0, 0, 0 },
   {"backup",          'b', POPT_ARG_NONE,   &make_backups, 0, 0, 0 },
+  {"source-backup",    0,  POPT_ARG_NONE,   &make_source_backups, 0, 0, 0},
   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
@@ -1820,7 +1823,8 @@ void server_options(char **args,int *arg
 			args[ac++] = "--super";
 		if (size_only)
 			args[ac++] = "--size-only";
-	}
+	} else if (make_source_backups)
+		args[ac++] = "--source-backup";
 
 	if (modify_window_set) {
 		if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
--- old/rsync.yo
+++ new/rsync.yo
@@ -344,6 +344,7 @@ to the detailed description below for a 
      --existing              skip creating new files on receiver
      --ignore-existing       skip updating files that exist on receiver
      --remove-source-files   sender removes synchronized files (non-dir)
+     --source-backup         ... and backs up those files
      --del                   an alias for --delete-during
      --delete                delete extraneous files from dest dirs
      --delete-before         receiver deletes before transfer (default)
@@ -998,6 +999,15 @@ dit(bf(--remove-source-files)) This tell
 side the files (meaning non-directories) that are a part of the transfer
 and have been successfully duplicated on the receiving side.
 
+dit(bf(--source-backup)) Makes the sender back up the source files it removes
+due to bf(--remove-source-files).  This option is independent of
+bf(--backup) but uses the same bf(--backup-dir) and bf(--suffix) settings,
+if any.  With bf(--backup-dir), each backup file is placed inside the backup
+dir according to the source file's full path from the working directory
+(source argument path + file-list path); if you want files placed according
+to the file-list path, you could either make appropriate symlinks or have the
+sender "cd" into the source directory so that the source argument is just ".".
+
 dit(bf(--delete)) This tells rsync to delete extraneous files from the
 receiving side (ones that aren't on the sending side), but only for the
 directories that are being synchronized.  You must have asked rsync to
--- old/sender.c
+++ new/sender.c
@@ -39,6 +39,7 @@ extern int protocol_version;
 extern int remove_source_files;
 extern int updating_basis_file;
 extern int make_backups;
+extern int make_source_backups;
 extern int do_progress;
 extern int inplace;
 extern int batch_fd;
@@ -123,6 +124,7 @@ void successful_send(int ndx)
 	char fname[MAXPATHLEN];
 	struct file_struct *file;
 	struct file_list *flist;
+	int result;
 
 	if (!remove_source_files)
 		return;
@@ -139,7 +141,11 @@ void successful_send(int ndx)
 		return;
 	f_name(file, fname);
 
-	if (do_unlink(fname) == 0) {
+	if (make_source_backups)
+		result = !make_backup(fname);
+	else
+		result = do_unlink(fname);
+	if (result == 0) {
 		if (verbose > 1)
 			rprintf(FINFO, "sender removed %s\n", fname);
 	} else