Vim command for “edit a copy of this file”

Question

A pattern I seem to be following right now is:

• edit a file until I like it
• :w another-file to use it as a starting point for another-file
• :e another-file to polish up another-file

Is there an existing ex command to do the latter two steps at once? Something like :writeAndEdit another-file?

I can fake one using vimscript, I just want to know if there's an existing command.

Answer 1

Could :saveas do the job?

:sav[eas][!] [++opt] {file}
            Save the current buffer under the name {file} and set
            the filename of the current buffer to {file}.  The
            previous name is used for the alternate file name.

Answer 2

You are less likely to overwrite your original file if you open the new file first and then copy the original file into the buffer.

:e another-file
:r original-file

I found an answer for you. Type :help saveas and enjoy!

:sav[eas][!] [++opt] {file} Save the current buffer under the name {file} and set the filename of the current buffer to {file}. The previous name is used for the alternate file name. The [!] is needed to overwrite an existing file. When 'filetype' is empty filetype detection is done with the new name, before the file is written. When the write was successful 'readonly' is reset. {not in Vi}