Why you probably don't want to use claws-mail
I've been using claws-mail as my email client for a while. Today I wanted to search all of my messages for some text and look through the results. When I couldn't figure out how to do that even after consulting the claws manual, I went to their official IRC channel.
This is what happened:
17:55 -!- .join mauke!~mauke@p3m/member/mauke #claws 17:55 -!- Irssi: #claws: Total of 33 nicks [8 ops, 0 halfops, 0 voices, 25 normal] 17:55 -!- Irssi: Join to #claws was synced in 1 secs 17:55 <mauke> hello, I am raging at claws-mail 18:08 <mauke> basically, the search feature is undocumented and I can't figure out how it works 18:15 <mohaa> "undocumented" ? 18:16 <mauke> yeah, like: When in "Extended" mode, the "Information" button is visible, enabling you to see the search syntax. 18:17 <mauke> doesn't "enable" shit 18:17 <mauke> "Run on select" isn't even mentioned in the manual 18:17 <mauke> what is 'S' in the Information window? 18:18 <mauke> after I run a search, where are the results? 18:18 <mauke> what exactly does 'E' do and how is it useful? 18:19 <mauke> what is the unit of '#' in 'ag'? 18:19 <mauke> how is % supposed to be used? 18:19 <mauke> "all filtering expressions are allowed" - what are "filtering expressions" and what does "allowed" mean here? 18:20 <mauke> how is E different from X? 18:20 <mauke> are parens allowed? if not, how do expressions work? 18:21 <mauke> what's the unit of # in Se/Sg/Ss? 18:21 <mauke> why does the description of 'tg' ("messages which tags contain S") randomly use "which" instead of "whose"? 18:22 <mauke> how does 'k' work? 18:22 <mauke> are the colors numbers? 18:24 <mohaa> "parens" ? 18:24 <mauke> yes 18:25 -!- .join krayon!~fallen@pdpc/supporter/28for7/krayon #claws 18:25 <mauke> I mean, how else does grouping work? 18:47 -!- .join firstname.lastname@example.org #claws 19:12 -!- .quit andyrtr!~andyrtr@archlinux/developer/andyrtr [Quit: Ex-Chat] 19:22 -!- .join Columbo0815!~foobar@HSI-KBW-085-216-116-089.hsi.kabelbw.de #claws 19:24 -!- .join email@example.com #claws 19:24 -!- .mode clunker3 #claws [+o claws_] 19:25 -!- .nick claws_ -> claws 19:42 -!- .quit Columbo0815!~foobar@HSI-KBW-085-216-116-089.hsi.kabelbw.de [Quit: Verlassend] 19:43 <@claws> mauke: you're funny :) 19:44 <mauke> why? 19:45 <@claws> maybe you wouldn't rage so much if you'd never found the feature or the feature didn't exist 19:45 <mauke> no, my main problem is the lack of a good search feature 19:45 <mauke> that's how this all started 19:45 <@claws> anyway, ignore the information dialog and click the edit button - this is probably easier to digest 19:46 <mauke> no, the edit button seems to lack all features 19:46 <@claws> the quick search is a _very good_ search feature imo 19:46 <@claws> no, the edit button does not 19:46 <mauke> claws: yes, but I can't figure out how to use it 19:46 <mauke> see above 19:46 <@claws> have you worked out how to use Filtering in Claws? 19:46 <mauke> no 19:46 <@claws> heh, thought not 19:47 <mauke> btw, I blanked some spam pages in the wiki 19:47 <@claws> heh, yes. there are always new spam pages in the wiki 19:47 <@claws> thanks. saved me a job 19:48 <@claws> back to the quick search, what are you likely to want to search for? 19:48 <mauke> text 19:48 <mauke> I want a full text search over everything 19:48 <@claws> b 'my search term' in Extended mode 19:48 <@claws> b is for body 19:48 <mauke> what happens if I omit the quotes? 19:49 <mauke> what happens with double quotes? 19:49 <mauke> how do I search for '? 19:49 <@claws> the quickest way to find your answer is to try it 19:50 <mauke> I did, results make no sense 19:50 <@claws> is that possible, perhaps? 19:50 <@claws> made no sense? in what way? 19:50 <mauke> why can't I just read a reference manual? 19:50 <@claws> dunno ...because you wouldn't?? 19:50 <mauke> well, first there's problem #1: <mauke> after I run a search, where are the results? 19:51 <@claws> because you haven't written it yet? 19:51 <@claws> the results are in the msg list - this list is shortened, based on the results 19:51 <mauke> what msg list? 19:51 <@claws> that's quite obvious, i think, no??? 19:51 <mauke> I have a nested folder structure 19:51 <@claws> now, m[e]s[sa]ge list _is_ in the manual!! 19:52 <@claws> the message list is not the folder list 19:52 <mauke> message list is the contents of one folder 19:52 <mauke> this is useless 19:52 <mauke> I don't want to manually click through all folders just to see if one of them maybe contains some search results 19:53 <@claws> then search in the top-level folder and use a recursive search 19:53 <mauke> I did 19:53 <@claws> that's not useless 19:53 <mauke> where are my results? 19:54 <@claws> a folder which has results has its folder icon replaced with a magnifying glass. select that folder and you'll see your results 19:54 <mauke> so I still have to manually click through the folders? 19:54 <mauke> blargh 19:54 <mauke> who came up with this UI 19:54 <@claws> why do you ask? 19:55 <mauke> that was more of a rhetorical question 19:55 <@claws> more like a rude question, methinks 19:55 <mauke> the search seems to ignore everything after the first word 19:55 <@claws> then quote 19:55 <mauke> is that correct? 19:56 <@claws> doesn't a test answer your question? 19:56 <mauke> no 19:56 <mauke> I can't rule out that it has some effect I didn't notice 19:57 <mauke> hence "seems to ignore" 19:57 <@claws> is it me, but you seem to have an attitude?? 19:58 <mauke> I do, but not where you think 19:58 <mauke> this confuses me a bit 19:59 <@claws> you do, but not where i think?? that confuses me 19:59 <mauke> I've been trying to be nice and civil at the end there 19:59 <@claws> maybe the beginning would have been better, but whatever! 19:59 <@claws> the quick search is good, it works. maybe it doesn't work how you want it to work, but there it is 20:00 <mauke> my main problem is not that it doesn't work how I want it to, it's that it's not documented 20:00 <mauke> so I don't even know if it does what I want 20:01 <mauke> the list at the beginning is the "obvious" questions I had when I saw the [Information] window 20:01 <mauke> the [Edit] dialog doesn't seem to allow a full text search 20:02 <mauke> and I didn't notice the folder icon change at all 20:02 <mauke> what I find weird is that you can't give me a straight answer as to what "b x y z" does 20:03 <mauke> normally I'd expect "RTFM" in response to that but there doesn't seem to be a FM 20:03 <mauke> you said I should try it; I did. now I'm simply asking for confirmation 20:04 <mauke> and all I get is "you seem to have an attitude" 20:08 <@claws> in the edit dialogue use phrase --> in body part 20:08 <mauke> oh wow 20:09 <@claws> maybe that's "all" you get because that's "all" you gave?? :) 20:09 <mauke> I didn't even think to look there because Header, Age, Flags, ... are other top-level categories 20:09 <@claws> in this case it's not RTFM, it's WTFM :) 20:10 <mauke> so I in analogy to Header I was looking for Body or Message or whatever 20:10 <mauke> yeah, Phrase is the odd one out 20:10 <mauke> the other items specify which part/attribute of the message to search *in*; Phrase describes what kind of thing you're looking *for* 20:11 <mauke> claws: dude, I asked you a simple yes/no question 20:11 <mauke> you could answer 1) yes, 2) no, 3) rtfm at ..., 4) you're stupid because ... 20:12 <@claws> but none of those fitted my answer 20:12 <mauke> but this "I don't like your attitude" bullshit is extremely annoying 20:12 <@claws> yep, i thought the same 20:12 <mauke> so why are you doing it? 20:13 <@claws> i'm not any more, i'm going to do something else 20:13 <mauke> sorry for assuming this program was meant to have users
- Changed the title from "shouldn't" to "don't want to" because that's closer to what I meant.
- Reformatted the log a bit to prevent the right side being cut off.
Oh wow, it keeps getting better. I really wanted to know how this #!$@ actually works so I downloaded the source code. It comes with a fairly long README that (among other things) explains Quick Search better than both the "user manual" and the built-in help system. It even has examples! First the filter engine syntax:
from regexpcase "foo" subject regexp "Bug" & to regexp "claws-mail"
Then the extended patterns:
# means number S means regexp string
f "john beavis" messages from john beavis %f "John Beavis" messages from John Beavis (case sensitive) ~s foo messages which do not have foo in the subject f foo & ~s bar messages from foo that do not have bar in thesubject
- What units are the # numbers in?
- What's the syntax for a "regexp string"?
- What regexp flavor?
But it does show that you can use double quotes and that the % should be placed immediately in front of one of the string operators.
S means regexp string" is the only occurrence of "regex" or "regul.*ex" in
Now I've looked at the source code. Turns out claws-mail uses a rewriting system to convert "extended patterns" into "filter syntax" internally. The actual syntax is a bit complicated:
- Tokens in the search expression are space separated.
- Every term in the expression starts with an (optionally prefixed) command.
- The prefixes are
- You can have at most one of
~(both mean "not"). If you have one, it must appear first.
- You can also have
%(it means "case sensitive").
- If prefixes are present, they must appear in the above order with no whitespace in between (example:
- Then comes the command code.
- Then the argument (if the command takes one).
- If the argument starts with a
"(double quote), it ends at the next
". There is no way to embed a
"in the string. Otherwise it ends at the next ' ' (space, ASCII 32) character (not the next whitespace character!).
- As far as the rewriter is concerned,
|are just commands without arguments, not operators between commands. That means there's no way to nest them (it also means
Regarding regex syntax:
- It uses
REG_EXTENDEDflag, so the flavor is POSIX Extended.
Regarding numeric units:
- Colors are something terrible (a message's "color value" is an integer whose parts are stored in different places; requires bitwise operations to reassemble).
I'm just going to assume that colors are numbered according to their appearance in the
- Age is internally stored with a resolution of one second, but the search operators work in whole days.
- Size is the raw message size in bytes.
If you're an end user, claws-mail may not be for you. Source diving seems to be the best way to get accurate and complete information on how the program works.