some more pointers & tips for gnus-alias...

[notmuch-wiki] / emacstips.mdwn

diff --git a/emacstips.mdwn b/emacstips.mdwn
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--- a/emacstips.mdwn
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@@ -459,3 +459,70 @@ part.
   2011-02-02.  Note that if you have the Debian package easypg
   installed, it will shadow the fixed version of easypg included with
   emacs.
+
+## Multiple identities using gnus-alias
+
+[gnus-alias](http://www.emacswiki.org/emacs/GnusAlias) allows you to
+define multiple identities when using `message-mode`. You can specify
+the from address, organization, extra headers (including *Bcc*), extra
+body text, and signature for each identity. Identities are chosen
+based on a set of rules. When you are in message mode, you can switch
+identities using gnus-alias.
+
+### "Installation"
+
+- put `gnus-alias.el` on your load Emacs-Lisp load path (add new directory
+  to load path by writing `(add-to-list 'load-path "/some/load/path")` into
+  your `.emacs`.
+
+- Add the following to your `.emacs`
+
+        (autoload 'gnus-alias-determine-identity "gnus-alias" "" t)
+        (add-hook 'message-setup-hook 'gnus-alias-determine-identity)
+
+Looking into `gnus-alias.el` gives a bit more information...
+
+### Example Configuration 
+
+Here is an example configuration.
+
+        ;; Define two identities, "home" and "work"
+        (setq gnus-alias-identity-alist
+              '(("home"
+                 nil ;; Does not refer to any other identity
+                 "John Doe <jdoe@example.net>" ;; Sender address
+                 nil ;; No organization header
+                 nil ;; No extra headers
+                 nil ;; No extra body text
+                 "~/.signature")
+                ("work"
+                 nil
+                 "John Doe <john.doe@example.com>"
+                 "Example Corp."
+                 (("Bcc" . "john.doe@example.com"))
+                 nil
+                 "~/.signature.work")))
+        ;; Use "home" identity by default
+        (setq gnus-alias-default-identity "home")
+        ;; Define rules to match work identity
+        (setq gnus-alias-identity-rules
+              '(("work" ("any" "john.doe@\\(example\\.com\\|help\\.example.com\\)" both) "work"))
+        ;; Determine identity when message-mode loads
+        (add-hook 'message-setup-hook 'gnus-alias-determine-identity)
+
+When `gnus-alias` has been loaded (using autoload, require, *M-x load-library*
+or *M-x load-file* (load-file takes file path -- therefore it can be used
+without any `.emacs` changes)) the following commands can be used to get(/set)
+more information (some of these have "extensive docvumentation"):
+
+        M-x describe-variable RET gnus-alias-identity-alist
+        M-x describe-variable RET gnus-alias-identity-rules
+        M-x describe-variable RET gnus-alias-default-identity
+
+        M-x customize-group RET gnus-alias RET
+          or 
+        M-x gnus-alias-customize RET
+
+The last two do the same thing.
+
+See also the **Usage:** section in `gnus-alias.el`.