David Bremner [Sat, 28 May 2011 09:50:11 +0000 (06:50 -0300)]
tests: Add optional use of timeout utility, if present.
Each top level test (basic, corpus, etc...) is run with a fixed
timeout of 2 minutes.
The goal here is to treat a hung test as a failure. The emacs test for
sending mail is known to be problematic on the Debian
autobuilders. This is both a bandaid fix for that, and a sensible long
term feature.
(cherry picked from commit 5f99c80e02736c90495558d9b88008a768876b29)
David Bremner [Sun, 19 Jun 2011 19:53:43 +0000 (16:53 -0300)]
Do not import notmuch in setup.py.
Importing notmuch loads the notmuch shared library. When building
without a system install of notmuch, this requires e.g. setting
LD_LIBRARY_PATH for building and fails completely for cleaning.
Sebastian Spaeth [Thu, 16 Jun 2011 15:33:47 +0000 (17:33 +0200)]
Simplify (& fix) Message().__str__()
We were still using len(self.get_replies()) for the __str__ summary of a
mail, but 1) len(Messages()) has just gone away 2) the number of replies
can not be retrieved when we got the message via search_messages()
anyway, and 3) it is likely quite expensive to pull all replies for all
messages that we display a summary of.
So we fix this by simplifying str(Message()) to omit the number of replies.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Sebastian Spaeth [Thu, 16 Jun 2011 12:41:02 +0000 (14:41 +0200)]
Implement Message.tags_to_maildir_flags
and also maildir_flags_to_tags. The methods will be invoked by
db.add_message() and also (if not overridden via function parameter) by
add|remove_tag and remove_all_tags. Documentation on the usage has been
updated.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Dmitry Kurochkin [Wed, 15 Jun 2011 11:12:12 +0000 (15:12 +0400)]
Fix double free in guess_from_received_header().
Before the change, the last loop in guess_from_received_header()
did not reset domain and tld variables to NULL. This leads to
double free error in some cases and possibly other bugs.
Dmitry Kurochkin [Wed, 25 May 2011 22:10:16 +0000 (02:10 +0400)]
Simplify message and headers visibility code in notmuch-show view.
Before the change, headers and message visibility functions took
extra care to correctly set `buffer-invisibility-spec'. This was
needed because headers overlay `invisible' property had only
headers' invisibility spec. So visibility of headers was
determined only by the headers invisibility spec. The patch sets
headers overlay `invisible' property a list with both the headers
and the message invisibility spec. This makes headers invisible
if either of them is added to the `buffer-invisibility-spec' and
allows to simplify the code.
Dmitry Kurochkin [Wed, 25 May 2011 22:10:15 +0000 (02:10 +0400)]
Set higher priority for headers and hidden citation overlays.
Before the patch, message, headers and hidden citation overlays
had zero priority. All these overlay have `invisible' property.
Emacs documentation says that we should not make assumptions
about which overlay will prevail when they have the same priority
[1]. It happens to work as we need, but we should not rely on
undocumented behavior.
Dmitry Kurochkin [Wed, 25 May 2011 22:10:14 +0000 (02:10 +0400)]
Fix hiding a message while some citations are shown in notmuch-show view.
Before the change, message and citation invisibility overlays
conflicted: if some citation is made visible and then the whole
message is hidden, that citation remained visible. This happened
because the citation's overlay has an invisible property which
takes priority over the message overlay. The message
invisibility spec does not affect citation visibility, it is
determined solely by the citation overlay invisibility spec.
Hence, if citation is made visible, it is not hidden by message
invisibility spec.
The patch changes citation overlay invisibility property to be a
list which contains both the citation and the message
invisibility specs. This makes the citation invisible if either
of them is added to the `buffer-invisibility-spec'. Note that
all citation visibility states are "restored" when the message
hidden and shown again.
Dmitry Kurochkin [Wed, 25 May 2011 22:10:12 +0000 (02:10 +0400)]
Pass message to the `notmuch-show-insert-text/plain-hook' hook.
Before the change, the `notmuch-show-insert-text/plain-hook' was
given only the `depth' argument. The patch adds another one -
the message. Currently, the new message argument is not used by
any on the hooks. But it will be used later to get access to
message invisibility specs when wash buttons are inserted.
Dmitry Kurochkin [Sat, 28 May 2011 01:29:17 +0000 (05:29 +0400)]
Workaround for Emacs bug #8721.
The emacs bug is that isearch cannot search through invisible text
when the 'invisible' property is a list.
The patch adds `notmuch-isearch-range-invisible' function which
is the same as `isearch-range-invisible' but with fixed Emacs bug
#8721. Advice added for `isearch-range-invisible' which calls
`notmuch-isearch-range-invisible' instead of the original
`isearch-range-invisible' when in `notmuch-show-mode'.
Sebastian Spaeth [Wed, 15 Jun 2011 12:25:33 +0000 (14:25 +0200)]
python: Remove Messages().__len__
Messages.__len__() exhausted the iterator and list() inherently calls
len(), so we could not invoke list(msgs) without getting errors. Fix
this by implementing __nonzero__ but removing __len__ on Messages.
Use Query.count_messages() or len(list(msgs)) if you need to know the
number.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Carl Worth [Sat, 11 Jun 2011 00:18:27 +0000 (17:18 -0700)]
test: Fix from-guessing to actually span Received headers over multiple lines
The intent was always to make these Received headers span multiple
lines. But the escapes were causing the shell to ignore the newlines,
so that the result instead was long Received headers on a single line
each.
Fixing the intent here doesn't actually change the test-suite results
at all.
Carl Worth [Fri, 10 Jun 2011 23:53:45 +0000 (16:53 -0700)]
test: Extend from-guessing test with a test with multiple Received headers
This is much more realistic, as most messages in the wild will have multiple
Received headers. Also, this demonstrates a current bug in the Received
header parsing, (multiple Received headers are not properly concatenated
depending on the order in which headers are parsed in a message).
Carl Worth [Fri, 10 Jun 2011 23:28:26 +0000 (16:28 -0700)]
test: Add test that emacs detects and hides top-post quotes of original messages
This tests the recently-added detection/hiding of top-posted quotations and
in the testing, it takes advantage of the less-recently-added
visible-buffer-string function for emitting only the visible text
from a buffer.
Our use of GMimeSession was unneeded boilerplate, and we weren't doing
anything with it. This simplifies and clarifies that assumption.
If we want to do anything fancier later, the examples in the gmime
source are a reasonable source to work from in defining a new
GMimeSession derivative.
Since GMimeSession is going away in GMime 2.6, though, i don't
recommend using it.
GMime has a nasty habit of taking ownership by default of any FILE*
handed to it va g_mime_stream_file_new. Specifically it will close the
FILE* when the stream is destroyed---even though GMime didn't open the
file itself.
To avoid this bad behavior, we have to carefully set_owner(FALSE)
after calling g_mime_stream_file_new. In the format_part_content_text
function, since commit d92146d3a6809f8ad940302af49cd99a0820665e we've
been calling g_mime_stream_file_new unconditionally, but only calling
g_mime_stream_file_set_owner(FALSE) conditionally.
This led to the FILE* being closed early when notmuch show output was
redirected to a file.
Fixing this fixes the test-suite cases that broke with the previous
commit, (which added redirected "notmuch show" calls to the test suite
to expose this bug).
Edited-by: Carl Worth <cworth@cworth.org> with a new commit message to
explain the bug and fix.
test: modify multipart test to use test_expect_equal_file
Again, this is a much cleaner and more thorough test, and in fact
exposes a bug in the format=text output, that will be fixed the next
commit. Because of this, some of the multipart tests currently fail.
test: update emacs test to use test_expect_equal_file
This is a much cleaner way to do the emacs tests, since we're actually
comparing output against existing files with expected output. We also
won't miss any trailing newlines this way.
And speaking of which, one of the expected output files was actually
missing a trailing blank line that was actually in one of the original
messages, so this was fixed.
Dmitry Kurochkin [Thu, 12 May 2011 13:56:25 +0000 (17:56 +0400)]
Make `notmuch-show-clean-address' parsing-error-proof.
Mail-header-parse-address may fail for an invalid address.
Before the change, this would result in empty notmuch-show buffer
with an error message like: Scan error: "Unbalanced parentheses".
The patch wraps the function in condition-case and returns
unchanged address in case of error.
Thomas Jost [Sat, 28 May 2011 21:51:56 +0000 (14:51 -0700)]
emacs: Cleaner interface when prompting for sender address
Most of the time, every entry in the list of identities has the same user name
part. It can then be filled in automatically, and the user can only be prompted
for the email address, which makes the interface much cleaner.
Dmitry Kurochkin [Sat, 28 May 2011 21:51:50 +0000 (14:51 -0700)]
Use message-field-value instead of message-fetch-field in FCC header setup.
For message-fetch-field the buffer is expected to be narrowed to
just the header of the message. That is not the case when
notmuch-fcc-header-setup is run, hence a wrong header value may be
returned. E.g. when forwarding an
email, (message-fetch-field "From") returns the From header value
of the forwarded email.
Message-field-value is the same as message-fetch-field, only
narrows the buffer to the headers first.
Analog to Threads.__nonzero__ this allows us to perform list() on a Threads() object and to repeatedly call "if Tags():" or "bool(Tags())" without implicitly invoking len(), thus exhausting our iterator.
While touching this code, I added a small micro-optimization to the Tag next() function. There is no need to explicitly check _is_valid, as _get implicitly does check for validness and returns None, if there is no more Tag to fetch. This avoids some roundtrips into the library when iterating through Tags.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
__nonzero__ checks if Threads() contains at least one more valid thread
The existence of this function makes 'if Threads(): foo' work, as that
previously implicitely called len() exhausting the iterator. This
function makes `bool(Threads())` work repeatedly.
For further info, see http://docs.python.org/reference/datamodel.html.
Credits for the hint go to Brian May.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Message().get_filenames() will return a generator that allows to
iterator over the recorded filenames for a certain Message. Do ntoe that
as all generators, these are one-time use only. You will have to reget
them to perform various actions. So this works::
len(Message().get_filenames())
list(Message().get_filenames())
for n in Message().get_filenames():
print n
But this won't::
names = Message().get_filenames()
len(names) #uses up the iterator
list(names) #outch, already used up...
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Pieter Praet [Sun, 20 Mar 2011 10:06:22 +0000 (11:06 +0100)]
emacs: Use "message-cited-text" instead of "message-cited-text-face"
(describe-face 'message-cited-text-face)
> message-cited-text-face is an alias for the face `message-cited-text'.
> This face is obsolete since 22.1; use `message-cited-text' instead.
test: add test for sanitized notmuch-search output
This feature was recently added, so it of course needs a test now.
Signed-off-by: Jameson Graef Rollins <jrollins@finestructure.net> Edited-by: Carl Worth <cworth@cworth.org> Fixed test to use
notmuch_search_sanitize in order to be robust against unpredictable
thread ID numbers, (due to unpredictable order in which the filesystem
presents files).
Andreas Amann [Sun, 8 May 2011 21:14:33 +0000 (23:14 +0200)]
Sanitize "Subject:" and "Author:" fields to not contain control characters in notmuch-search
When a Subject field contained encoded CRLF sequences, these sequences
would appear unfiltered in the output of notmuch search. This confused
the notmuch emacs interface leading to "Unexpected Output"
messages. This is now fixed by replacing all characters with ASCII
code less than 32 with a question mark.
Thomas Jost [Wed, 30 Mar 2011 22:31:04 +0000 (00:31 +0200)]
emacs: Define several faces for the crypto-status button
Signed-off-by: Jameson Graef Rollins <jrollins@finestructure.net>
jrollins modified this patch to conform to recent changes in the
crypto processing since this patch was originally sent in.
test: move utf-8 subject search test from json to search test script
This test doesn't have anything to do with json, and has everything to
do with testing search capability, so I'm not sure why it was in the
wrong place.
test: Move a test from search to search-output, and add a similar json test
The "Search for non-existent message prints nothing" test fits better
with the existing tests in search-output, so move it there. Also add a
similar test for the --format=json case.
These tests also use the new test_expect_equal_file function, (to ensure
that the presence of a trailing newline is correctly tested).
Fix missing final newline in notmuch search output
A previous commit to fix json formatting for null results
(0b1ddc5f6652bde99d63d9d553777b3d926694cf) accidentally introduced a
regression that removed trailing newlines for non-json output. (There
wasn't a good test for this previously, but there is now). The
problem is due to the fundamental differences in formatting between
the json and non-json outputs. The only way to fix this was to add a
new formatting field that represents the string to output at the end
of a null result.
All output formatting tests should pass now, (in particular, the 4
recent test failures introduced to show this bug).
test: modify search-output test to use the new test_expect_equal_file function
These test now properly test for the presence of a newline at the end
of all output. Right now some of these test will fail because the
search output is currently broken to *not* produce proper newlines in
some cases.
Carl Worth [Wed, 1 Jun 2011 20:02:58 +0000 (13:02 -0700)]
configure: Fix detection of libdir in ldconfig configuration
Ever since commit b4b5e9ce4dac62111ec11da6d22b7e618056801f the
detection of libdir in the ldconfig configuration has been broken,
resulting in RPATH being set when not needed and not wanted.
The cause was a change from an IFS setting of:
IFS="$(printf '\n\t')"
to a new setting of:
IFS="$(printf '\n')"
That looks desirable since we want to split the output of ldconfig
based on newlines, (and not split on any filename that might have an
embedded tab in it). The subtle bug in the above is that the shell
trims any trailing newlines when performing command substitution so
the final statement above was equivalent to:
IFS=''
which prevented any splitting of the ldconfig output at all.
Fix this by avoiding command substitution and just using a literal
newline in the source file for setting this variable.
Carl Worth [Tue, 31 May 2011 23:16:04 +0000 (16:16 -0700)]
show: Remove some dead code from show_text_part_content
Now that this function registers an internal error if called with a
non-text part, we can remove the conditions for multipart and
message-part content types.
Carl Worth [Tue, 31 May 2011 23:13:21 +0000 (16:13 -0700)]
notmuch show: Don't do text conversions for non-text parts
This fixes the recently-added test case (in test/multipart)
demonstrating corruption of binary parts that happen to contain CRLF
pairs.
We restore the original code from show_one_part_content to
format_part_content_raw. Then, for good measure, we rename
show_part_content to the more descriptive show_text_part_content and
add an internal error if it is ever called with a non-text part.
Carl Worth [Tue, 31 May 2011 22:39:26 +0000 (15:39 -0700)]
test: Add test showing notmuch corrupts a part with a CRLF pair in it
Since commit 2f8871df6ea3c0b44f85a0fc1b4f58a6b70b0a0e notmuch has been
using a function (show_part_content) originally written only for text
parts to save all MIME parts. The problem with this is that this
function converts CRLF pairs to LF only and optionally converts to
UTF-8 encoding. These two conversions have the potential to corrupt
binary data when passed through the function.
This test demonstrates that corruption, and so fails currently, until
we fix the bug.
Carl Worth [Tue, 31 May 2011 22:19:12 +0000 (15:19 -0700)]
test: Fix a misspelling in one of our test cases.
Not that it affects the correctness of the test, but it's nice to use
proper spelling. This kind of change could invalidate a signature on the
test message, but I think that would have happened previously when the
HTML part was added in the first place.
Dmitry Kurochkin [Tue, 10 May 2011 03:30:50 +0000 (07:30 +0400)]
test: copy files in test_expect_equal_file instead of moving them
Before the change, test_expect_equal_file moved files it compared
in case of failure. The patch changes it to copy the files
instead. This allows testing non-temporary files which are
stored in git.
Note: the change should not result in new temporary files left
after the tests. Test_expect_equal_file used to move files only
on failure, so callers had to cleanup them anyway.
Don't re-compress .gz & al. in notmuch-show-save-part.
Write-region handles some file names specially, see Emacs Lisp
manual section 25.11 Making Certain File Names "Magic" [1]. This
is a nice feature for normal text editing, but it is not
desirable if we need to save raw file content (e.g. attachment).
In particular, this affects archives and may result in corrupted
attachments saved with notmuch-show-save-part (attachment button
click handler).
Turns out, smart GNUS folks encountered the same problem and
implemented write-region wrapper which inhibits some file name
handlers. In particular, this wrapper is used in mm-save-part,
which is why notmuch-save-attachments that uses it works fine
with archives.
The patch replaces write-region with mm-write-region in
notmuch-show-save-part. Also it removes coding-system-for-write
and require-final-newline setting in notmuch-show-save-part. The
former is set in mm-write-region. The latter seems to be
unneeded because mm-save-part does not use it.
emacs: Give mutlipart/{signed, encrypted} their own part handler.
This is the best way to make the displayed output for
decrypted/verified messages clearer. The special sigstatus and
encstatus buttons are now displayed under the part header button. The
part header button is also tweaked to provide information to user
about how to proces crypto.
emacs: Do not attempt to render arbitrary application parts.
We probably shouldn't have been doing this anyway, but we do it here
specifically because we don't want the content of the
application/pgp-encrypted parts to be displayed and cluttering the
message show.
Render all parts of multipart/encrypted when decrypting.
The primary goal here is to keep the decrypted output as similarly
structured as undecrypted output as possible. Now, when decrypting
parts, only the original encrypted part is replaced by the it's
decrypted content. If this part isn't itself a multipart, then all
part numbering should remain consistent during decryption.
The only draw back here is that the useless application/pgp-encrypted
sub-part of the multipart/encrypted part is also emitted. But this
part can be easily ignored by clients.
Do not replace multipart/signed part with content part when doing verification.
Some folks have complained about the part renumbering that occurs when
the entire multipart/signed part is replaced with the part contents
after verification. This is primarily because it incurs an additional
computational cost to retrieve individual parts, since verification
has to be performed again to ensure that part numbering is consistent.
This patch simply leaves the full multipart/signed part as is.
The emacs crypto test is also updated to reflect this change.
This patch adds the tag "signed" to messages with any multipart/signed
parts, and the tag "encrypted" to messages with any
multipart/encrypted parts. This only occurs when messages are indexed
during notmuch new, so a database rebuild is required to have old
messages tagged.
emacs: Add support for PGP/MIME verification/decryption
A new emacs configuration variable "notmuch-crypto-process-mime"
controls the processing of PGP/MIME signatures and encrypted parts.
When this is set true, notmuch-query will use the notmuch show
--decrypt flag to decrypt encrypted messages and/or calculate the
sigstatus of signed messages. If sigstatus is available, notmuch-show
will place a specially color-coded header at the begining of the
signed message.
Also included is the ability to switch decryption/verification on/off
on the fly, which is bound to M-RET in notmuch-search-mode.
Add decryption of PGP/MIME-encrypted parts with --decrypt.
This adds support for decrypting PGP/MIME-encrypted parts to
notmuch-show and notmuch-reply. The --decrypt option implies
--verify. Once decryption (and possibly signature verification) is
done, a new part_encstatus formatter is emitted, the part_sigstatus
formatter is emitted, and the entire multipart/encrypted part is
replaced by the contents of the encrypted part.
At the moment only a json part_encstatus formatting function is
available, even though decryption is done for all formats. Emacs
support to follow.
Add signature verification of PGP/MIME-signed parts with --verify.
This is primarily for notmuch-show, although the functionality is
added to show-message. Once signatures are processed a new
part_sigstatus formatter is emitted, and the entire multipart/signed
part is replaced with the contents of the signed part.
At the moment only a json part_sigstatus formatting function is
available. Emacs support to follow.
The original work for this patch was done by
Daniel Kahn Gillmor <dkg@fifthhorseman.net>
whose help with this functionality I greatly appreciate.
test: add crypto tests for signature verification and decryption
This adds a new "crypto" test script to the test suite to test
PGP/MIME signature verification and message decryption. Included here
is a test GNUPGHOME with a test secret key (passwordless), and test
for:
* signing/verification
* signing/verification with full owner trust
* verification with signer key unavailable
* encryption/decryption
* decryption failure with missing key
* encryption/decryption + signing/verfifying
* reply to encrypted message
* verification of signature from revoked key
These tests are not expected to pass now, but will as crypto
functionality is included.
test: new test-lib function to test for equality between files
We need to be able to test for the presence of a newline at the end of
output. There's no good way to capture trailing newlines in bash, so
redirecting output to a file is the next best thing. This new
function should be used when testing for output that is expected to
have trailing newlines.
Break up format->part function into part_start and part_content functions.
Future improvements (eg. crypto support) will require adding new part
header. By breaking up the output of part headers from the output of
part content, we can easily out new part headers with new formatting
functions.
Integrate reply_part_content function into reply_part function.
After the last patch to eliminate some redundant code paths in
reply_part, the reply_part_content function was only being called
once. Disolving the function and integrating its contents into the
reply_part function makes things a little simpler, and frees up some
name space that will be needed in the next patch.
Dmitry Kurochkin [Tue, 10 May 2011 06:25:08 +0000 (10:25 +0400)]
test: use `princ' instead of `message' calls in emacs tests
The patch replaces all (message (buffer-string)) calls in emacs
tests with (princ (buffer-string)). This avoids accidentally
interpreting '%' as format specifiers and makes code simpler
because we do not need to capture stderr.
Also, the patch works around an Emacs (23.3+1-1 on current Debian
Unstable) segfault in "Ensure that emacs doesn't drop results"
test. Note: the segfault does not happen on every test run.
Though, it seems to be consistently reproducible if the test uses
300 messages instead of 30. Hopefully, it is the crash described
in Emacs bug #8545 [1] which is already fixed.
test: change "#!/bin/bash" to "#!/usr/bin/env bash" enhances portability
Change #!/bin/bash at start of tests to "#!/usr/bin/env bash". That way
systems running on bash < 4 can prepend bash >= 4 to path before
running the tests.
Daniel Schoepe [Wed, 25 May 2011 21:21:54 +0000 (23:21 +0200)]
emacs: Make the queries used in the all-tags section configurable
This patch adds a customization variable that controls what queries
are used to construct the all-tags section in notmuch-hello. It allows
the user to specify a function to construct the query given a tag or
a string that is used as a filter for each tag.
It also adds a variable to hide various tags from the all-tags section.
Signed-off-by: Daniel Schoepe <daniel.schoepe@googlemail.com>
Dmitry Kurochkin [Thu, 26 May 2011 16:27:58 +0000 (20:27 +0400)]
test: add test-lib.el file with `visible-buffer-string' function
The patch adds test-lib.el file for Emacs tests auxiliary stuff.
Currently, it implements two functions: `visible-buffer-string'
and `visible-buffer-substring'. These are similar to standard
counterparts without "visible-" prefix but exclude invisible
text. The functions are not used anywhere at the moment but
should be useful for testing hiding/showing in the Emacs
interface.
Edited-by: Carl Worth <cworth@cworth.org> Fixed "basic" test to ignore
new test-lib.el file.
Thomas Jost [Thu, 26 May 2011 08:41:30 +0000 (10:41 +0200)]
emacs: Helpers needed for the user to be able to choose the "From" address when composing a new message
This adds functions and variables needed for this feature to be implemented.
Once it's done, the user will be able to use a prefix argument (e.g. pressing
C-u m instead of m) and be able to select a From address.
By default the list of names/addresses to be used during completion will be
automatically generated by the settings in the notmuch configuration file. The
user can customize the notmuch-identities variable to provide an alternate list.
This is based on a previous patch by Carl Worth
(id:"87wrhfvk6a.fsf@yoom.home.cworth.org" and follow-ups).
Dmitry Kurochkin [Tue, 24 May 2011 23:02:43 +0000 (03:02 +0400)]
Carefully manage save/restore of point in `notmuch-wash-toggle-invisible-action'.
Before the change, save-excursion was used to save the point. But the
marker saved by save-excursion was inside a region that was deleted,
so that approach is unreliable, (leading to point jumping to a new
position past the button). This patch instead saves point in an
integer variable, and when restoring, carefully avoids moving point
past the button, (in case the new button label is shorter than the old
button label).
Dmitry Kurochkin [Sun, 22 May 2011 18:57:53 +0000 (22:57 +0400)]
Use different labels for wash buttons when text is visible or hidden.
Before the change, citation and signature wash buttons used the
same label in both visible and hidden states. Sometimes it is
very convenient when you can determine if the text is hidden or
shown without reading the context and/or clicking the button.
The patch makes it easy to see if the text is shown or hidden by
explicitly saying what the button does (shows or hides the text).
Daniel Schoepe [Sun, 15 May 2011 15:48:58 +0000 (17:48 +0200)]
emacs: add notmuch-before- and notmuch-after-tag-hook
This patch adds hooks that are run before/after messages are tagged
From the emacs interface. In order to implement this and to avoid
having hooks parse all the arguments to the notmuch binary again, I
created a `notmuch-tag' function that other modules should use instead
of running (notmuch-call-notmuch-process "tag" ...) directly.