Use gist.el

github repo

gist buffer:

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g : reload the gist list from server
e : edit current gist description
k : delete current gist
+ : add a file to the current gist
- : remove a file from the current gist

in-place edition. While viewing a gist file buffer, you can:

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C-x C-s : save a new version of the gist
C-x C-w : rename some file

Functions:

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gist-list - Lists your gists in a new buffer. Use arrow keys
to browse, RET to open one in the other buffer.

gist-region - Copies Gist URL into the kill ring.
With a prefix argument, makes a private gist.

gist-region-private - Explicitly create a private gist.

gist-buffer - Copies Gist URL into the kill ring.
With a prefix argument, makes a private gist.

gist-buffer-private - Explicitly create a private gist.

gist-region-or-buffer - Post either the current region, or if mark
is not set, the current buffer as a new paste at gist.github.com .
Copies the URL into the kill ring.
With a prefix argument, makes a private paste.

gist-region-or-buffer-private - Explicitly create a gist from the
region or buffer.