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6. Remote and Compressed Files

Ediff works with remote, compressed, and encrypted files. Ediff supports `ange-ftp.el', `jka-compr.el', `uncompress.el' and `crypt++.el', but it may work with other similar packages as well. This means that you can compare files residing on another machine, or you can apply a patch to a file on another machine. Even the patch itself can be a remote file!

When patching compressed or remote files, Ediff does not rename the source file (unlike what the patch utility would usually do). Instead, the source file retains its name and the result of applying the patch is placed in a temporary file that has the suffix `_patched' attached. Generally, this applies to files that are handled using black magic, such as special file handlers (ange-ftp and some compression and encryption packages all use this method).

Regular files are treated by the patch utility in the usual manner, i.e., the original is renamed into `source-name.orig' and the result of the patch is placed into the file source-name. (Ediff `_orig' on systems like VMS, DOS, etc.)



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