Sams Teach Yourself Emacs in 24 Hours
Hour 20: Gnus Basics
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Sams Teach Yourself Emacs in 24 Hours |
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Hour 20: Gnus Basics |
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To get started with Gnus, you need to insert a few lines in your .Gnus file. The .Gnus file is located in the same place as your .emacs file and serves the same purpose as the .emacs file, with the one exception; the code written into the .Gnus file is configured specifically for Gnus.
You might be in a situation where you want to use Gnus for either news or mail, but not both. In that case, do one of the following:
To make Gnus handle news, you must tell it which news server (or NNTP server) you would like to use. If you do not have a clue what this should be then start Gnus without configuring it and, if you are lucky, someone else already has configured this for you (for example, your system administrator). You should see the name of the news server in the modeline (refer to Figure 20.1).
If you want Gnus to handle mail, you have to decide which mail backend you want to use. As a rule of thumb, you might chose nnfolder if you have large mail archives (with many letters that should last forever) or if you are very anxious about not burning any bridges and want to be able to get back to your old mail program. If, on the other hand, you subscribe to many mailing lists with a lot of mail arriving each day, you should probably use the nnml backend. It is possible to change the backend later! This is, however, beyond the scope of this book, so please refer to the Gnus reference manual.
Given that the server you want to use is called news.somewhere.org and you want to use the nnfolder backend, you must insert one of the following into your .emacs file:
Using Gnus only for news:
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(setq gnus-select-method '(nntp "news.somewhere.org"))
(setq gnus-select-method '(nnfolder ""))
Using Gnus for news and for mail:
(setq gnus-select-method '(nntp "news.somewhere.org")) (setq gnus-secondary-select-methods '((nnfolder "")))
If you want to read mail with Gnus, you have to tell Gnus about where it should fetch your mail from. There are three different ways Gnus can fetch mail for you:
Using a spool file. In UNIX this is the most common way to retrieve mail (for example, from /var/spool/mail/user-name).
Using a POP server. This is the easiest way for Windows users and is also often used by users who are reading their mail from an ISP.
Fetching mail from a directory. This is used when you use an external program such as procmail to sort mail coming from a mailing lists into different files each belonging to one mailing list.
Each of the three methods have options describing the method, as can be seen in Table 20.1
Additional options exist for the POP mail-fetching method. These do, however, require customization beyond the scope of this book. See the Gnus reference manual if this doesn't work for you.
You can tell Gnus to read your mail from several different sources at the same time; for example, if you have your inbox in the ordinary spool directory and you also get mailing lists sorted into a directory, it is possible to get mail from both places. To specify where to get mail from, you must set the variable nnmail-spool-file. This variable is best described with an example:
(setq nnmail-spool-file '( (file :path "/var/spool/mail/blackie") (directory :path "/home/blackie/Mail" :suffix ".procmail") (pop :server "pop.mail.server" :user "Gnus-lover" :password "SeCrEt") ))
The first and last lines are simply some Lisp code that needs to be there. The three lines in the middle describe three different places to fetch mail from. The first is from a spool file; the second is from a directory where mail has been delivered into files ending in .procmail. Finally, the third place is a POP server called pop.mail.server, where my username at the server is Gnus-lover, and my password is SeCrEt. Please note the colons in front of the options.
When you have told Gnus where to fetch your mail and news, it's time to start Gnus for the first time. But before you do that, please ensure that you are online and that you have some mail in your inbox (given, of course, that you want to read mail with Gnus). To start Gnus, press M-x and type gnus. When Gnus has started up, it reads the information from your news server about which groups exist. The size of this information depends on the number of newsgroups your server offers (the size for my server is approximately 2MB). Don't worry; Gnus does not have to fetch this file each time it starts.
When Gnus has started, you will be subscribed to a few newsgroups, and your incoming mail folder is shown as a group called mail.misc. This can be seen in Figure 20.1.
If you, for some reason, should not be subscribed to your incoming mail boxes, press the caret (^). This brings you to a buffer like the one seen in Figure 20.5.
Figure
20.5
The
Server buffer.
In this buffer you can see all your servers (that is, all the different places from which Gnus can fetch mail and news). If you press the Enter key on the backend you use for mail ( nnfolder in Figure 20.5), you get to a buffer like the one seen in Figure 20.6. From this buffer you can subscribe to the mail groups available. (There might be several if you have told Emacs to read mail from a directory; in this case, each file in this directory reflects a mail group.) Subscribing to one of the groups is done by pressing u. (That is, u for unsubscribe--the key is a toggle.)
Figure
20.6
This shows the mail
group with the incoming messages.
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Sams Teach Yourself Emacs in 24 Hours |
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Hour 20: Gnus Basics |
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