Previously, notmuch-show-view-part overrode the function binding of
mm-show-part to redirect it to notmuch-show-save-part to get notmuch's
default file name handling in case mm-display-part decided to fall
back to saving the part. In addition to being messy, this depended on
the now-deprecated dynamic binding behavior of flet.
This patch removes the mm-show-part override in favor of passing the
file name in to mm-show-part the way it expects, so we get its default
file name handling. It's not clear why we didn't do this before;
mm-show-part has supported default file names since at least Emacs
23.1.
Previously, we simply byte compiled each Elisp source file
independently. This is actually the wrong thing to do and can lead to
issues with macros and performance issues with substitutions because
1) when the byte compiler encounters a (require 'x) form, it will load
x.elc in preference to x.el, even if x.el is newer, and as a result
may load old macro and substitution definitions and 2) if we update a
macro or substitution definition in one file, we currently won't
re-compile other files that depend on the file containing the
definition.
This patch addresses these problems by computing make dependency rules
from the (require 'x) forms in the Elisp source files, which we inject
into make's dependency database.
Currently mime parts are basically handled based on their mime-type
with the exception of application/octet-stream parts. Deal with these
parts at the top level (notmuch-show-insert-bodypart).
This is needed later in the series as we need to put in a part button
for each part (which means knowing its mime type) while deferring the
actual insertion of the part.
Apparently Emacs provides a function to stringify errors properly.
Use this in the search sentinel where we have to do our own error
messaging, rather than assuming the first error argument will be the
descriptive string.
When compiling notmuch-tag.el there is a compile warning:
notmuch-tag.el:27:1:Warning: cl package required at runtime
Since we have decided to allow runtime use of cl we suppress this
warning by adding a tail comment to the file.
The support for emacs version 22 has not worked at least since
September 2011 when I attempted to use it. I expanded the support in
id:yf6ippgtbn0.fsf@taco2.nixu.fi but that was not enough and then I
found it easier to switch to emacs 23.
In case one wants to resurrect emacs 22 (or earlier!) support, pick
the changes from the patch email referenced above.
Added a customizable variable notmuch-address-selection-function
and the function with the same name to provide a way for user to
change the function called to do address selection.
By default the functionality is exactly the same as it has been so
far; completing-read is called with the same parameters as before.
Setting equivalent lambda expression in place of using
notmuch-address-selection-function function is done as follows:
(setq notmuch-address-selection-function
(lambda (prompt collection initial-input)
(completing-read prompt collection nil nil initial-input)))
For example drop-in replacement with ido-completing-read can be done
easily as an one alternative to the default.
Some (declare-function ...) definitions were drifted away from the
actual (defun ...)'s. To find the drifts and to verify changes
the following command line was used:
$ emacs --batch -L emacs --eval '(check-declare-directory "emacs")'
From a show buffer, notmuch-bbdb/snarf-from imports the sender into
bbdb. notmuch-bbdb/snarf-to imports all recipients. Newly imported
contacts are reported in the minibuffer / Messages buffer.
Both functions use the BBDB parser to recognize email address formats.
This modifies notmuch hello to use the new count --batch
functionality. It should give exactly the same results as before but
under many conditions it should be much faster. In particular it is
much faster for remote use.
The code is a little ugly as it has to do some working out of the
query when asking the query and some when dealing with the result.
However, the code path is exactly the same in both local and remote
use.
This has two benefits: unified error handling, and avoiding tramp's
hooking into shell-command-string.
This seems to be a fix for id:874nguxbvq.fsf@tu-dortmund.de
This patch extracts the rendering of tags in notmuch-show to
the notmuch-tag file.
This file introduces a `notmuch-tag-formats' variable that associates
each tag to a particular format. This variable can be customized
thanks to the work of Austin Clements. For example,
'(("unread" (propertize tag 'face '(:foreground "red")))
("flagged" (notmuch-tag-format-image tag "star.svg")))
associates a red foreground to the "unread" tag and a star picture to
the "flagged" tag.
Signed-off-by: Damien Cassou <damien.cassou@gmail.com>
This improves notmuch-combine-face-text-property to support both
applying faces to strings and to support combining the given face
under existing faces, rather than over.
Previously, notmuch-combine-face-text-property assumed that any
existing face properties of the modified text were already in face
list form. This was true as long as it was the only function
manipulating faces (since it always produced a list form face), but if
anything else has manipulated the face, it was more likely to be
either a face name or a face plist. It also didn't correctly handle
face lists as arguments, even though the doc string claimed it did.
This patch fixes notmuch-combine-face-text-property to handle all face
forms correctly by canonicalizing both the argument face and the
existing faces into list form. This also means we can set the face to
a simpler non-list form if there's no existing face.
Emacs has two button type objects: widgets (as used for saved searches
in notmuch-hello) and buttons as used by parts/citations and id links
in notmuch-show. These two behave subtly differently when clicked with
the mouse: widgets select the window clicked before running the
action, buttons do not.
This patch makes all of these behave the same: clicking always selects
the clicked window. It does this by defining a notmuch-button-type
supertype that the other notmuch buttons can inherit from. This
supertype binds the mouse-action to select the window and then
activate the button.
There is a bug in the current notmuch code with w3m and invisible
parts. w3m sets a keymap, and if we have a hidden [text/html] point
at the start of the following line still gets this w3m keymap which
causes some strange effects. For example, RET gives an error "No URL
at Point" rather than hiding the message, <down> goes to the next link
rather than just down a line.
These keybinding are also inconvenient when the text/html part is
displayed so we ask w3m not to install a keymap.
This is only likely to be a problem for emacs 23 as shr is preferred
as html renderer on emacs 24 (although the user can set the renderer
to w3m even on emacs 24).
This solution was suggested by Tomi Ollila <tomi.ollila@iki.fi>
We recently switched to popping up a buffer to report CLI errors, but
this was too intrusive, especially for transient errors and especially
since we made fewer things ignore errors. This patch changes this to
display a basic error message in the minibuffer (using Emacs' usual
error handling path) and, if there are additional details, to log
these to a separate error buffer and reference the error buffer from
the minibuffer message. This is more in line with how Emacs typically
handles errors, but makes the details available to the user without
flooding them with the details.
Given this split, we pare down the basic message and make it more
user-friendly, and also make the verbose message even more detailed
(and more debugging-oriented).
Now that the invisibility display of parts is present we no longer
need to force the display of all multipart/alternatives: users can
toggle them for themselves when needed.
This adds a button action to show hidden parts. In this version "RET"
toggles the visibility of any part which puts content in the buffer
(as opposed to attachments such as application/pdf).
The button is used to hide parts when appropriate (eg text/html in
multipart/alternative).
This makes notmuch-show-insert-bodypart add an overlay for any
non-trivial part with a button header (currently the first text/plain
part does not have a button). At this point the overlay is available
to the button but there is no action using it yet.
In addition the argument HIDE is passed down to
notmuch-show-insert-part-overlays to request that the part be hidden
by default but this is not acted on yet.
This just make notmuch-show-insert-part-header save the basic button
text for parts as an attribute. This makes it simpler for the button
action (added in a later patch) to reword the label as appropriate (eg
append "(not shown)" or not as appropriate).
Previously, all visibility in show buffers for headers, message
bodies, and washed text was specified by generating one or more
symbols for each region and creating overlays with their 'invisible
property set to carefully crafted combinations of these symbols.
Visibility was controlled not by modifying the overlays directly, but
by adding and removing the generated symbols from a gigantic buffer
invisibilty spec.
This has myriad negative consequences. It's slow because Emacs'
display engine has to traverse the buffer invisibility list for every
overlay and, since every overlay has its own symbol, this makes
rendering O(N^2) in the number of overlays. It composes poorly
because symbol-type 'invisible properties are taken from the highest
priority overlay over a given character (which is often ambiguous!),
rather than being gathered from all overlays over a character. As a
result, we have to include symbols related to message hiding in the
wash code lest the wash overlays un-hide parts of hidden messages. It
also requires various workarounds for isearch to properly open
overlays, to set up buffer-invisibility-spec for
remove-from-invisibility-spec to work right, and to explicitly refresh
the display after updating the buffer invisibility spec.
None of this is necessary.
This patch converts show and wash to use simple boolean 'invisible
properties and to not use the buffer invisibility spec. Rather than
adding and removing generated symbols from the invisibility spec, the
code now directly toggles the 'invisible property of the appropriate
overlay. This speeds up rendering because the display engine only has
to check the boolean values of the overlays over a character. It
composes nicely because text will be invisible if *any* overlay over
it has 'invisible t, which means we can overlap invisibility overlays
with abandon. We no longer need any of the workarounds mentioned
above. And it fixes a minor bug for free: now, when isearch opens a
washed region, the button text will update to say "Click/Enter to
hide" rather than remaining unchanged.
This slightly changes the output of an existing test since we now
report non-zero exits with a pop-up buffer instead of at the end of
the search results.
This checks for non-zero exit status from JSON CLI calls and pops up
an error buffer with stderr and stdout. A consequence of this is that
show and reply now handle errors, rather than ignoring them.
This provides library functions for unified handling of errors from
the notmuch CLI. Follow-up patches will convert some scattered error
handling to use this and add error handling where we currently ignore
errors.
Previously, if the input stream consisted only of an error message,
notmuch-json-begin-compound would signal a (wrong-type-argument
number-or-marker-p nil) error when reaching the end of the error
message. This happened because notmuch-json-scan-to-value would think
that it reached a value and put the parser into the 'value state.
Even after notmuch-json-begin-compound signaled the syntax error, the
parser would remain in this state and when the resynchronization logic
reached the end of the buffer, the parser would fail because the
'value state indicates that characters are available.
This fixes this problem by restoring the parser's previous state if it
encounters a syntax error.
Previously refreshing the notmuch show buffer did not remove overlays
which meant that if the user refreshed a message with images the
images would remain and then the new text was added after.
One might have guessed that erase-buffer would have removed them but
it seems not. Thus force the removal of overlays with remove-overlays.
Remove notmuch-folders which has been deprecated since
commit a466921760
Author: Carl Worth <cworth@cworth.org>
Date: Mon Apr 26 22:42:07 2010 -0700
emacs: Rip out all of the notmuch-folder code.
This lets us simplify the notmuch-saved-searches code slightly.
This function is also used by pick so split it out in preperation for
moving to lib. In fact, pick and show want a slightly different
combination of name and email on return so make the separated function
return them as a pair, and let show or pick extract the combination
they want from that.
The macro with-current-notmuch-show-message executes command
`notmuch show --format=raw id:...` which just outputs the contents
of the mail file verbatim (into temporary buffer). In case e.g. utf-8
locale is used the temporary buffer has buffer-file-coding-system as
utf-8. In this case Emacs converts the data to multibyte format, guessing
that input is in utf-8.
However, the "raw" (MIME) message may contain octet data in any other
8bit format, and as no (MIME-)content spesific handling to the message
is done at this point, conversion to other formats may lose information.
By setting coding-system-for-read 'no-conversion drops the conversion part
and makes this handle input as notmuch-get-bodypart-internal() does.
This marks the broken test in previous change fixed.
icalendar-import-buffer can fail by an error signal (which have been
witnessed) but according to its docstring it can also return nil
when failing (it returns t when succeeding).
Now that the error is caught by the caller of notmuch-show-inset-part-*
functions in case icalendar-import-buffer returns nil an explicit
error is signaled and unwind-protect takes care of deleting the
temporary file (just in case, it is usually not written to the fs yet).
notmuch-get-bodypart-content provides raw data to its caller so
that it can be stored verbatim whenever needed. icalendar functions
expect Emacs to do EOL conversion for the data given to these. Therefore
it the CRLF -> LF conversion is now done explicitly.
The calls to private functions icalendar--convert-ical-to-diary and
icalendar--read-element are replaced with call to public function
icalendar-import-buffer.
This regexp agrees with Xapian query syntax much more closely, though
we specifically disallow various cases that would be confusing in the
context of an email body (e.g., punctuation at the end of an id: link
is not considered part of the id: link because it's probably part of
the surrounding text).
In particular, this handles id: links that are not surrounded by
quotes much better, which stash is much more likely to generate now
that we don't quote id's that don't need to be quoted. It also
handles quoted id: links better.
We update the buttonization test to reflect the new pattern.
When inserting of email bodypart failes, insert a failure message
to the buffer (and continue) instead of halting the insertion of
the rest of that email thread in question.
This patch just renames the internal variables for the JSON parser now
it is no longer specific to search mode. It also fixes up the white
space after the previous patch. There should be no functional changes.
This patch splits out the incremental json parser into its own
function.
It moves the main logic of the parser to happen inside the parse
buffer rather than inside the results buffer, but makes sure all
results and all errors are displayed in the results buffer.
It also changes the local parser variables from being buffer
local to the results buffer to being buffer local to the parse buffer,
and sets them up automatically so the caller does not need to.
Finally to keep the diff small this patch does not fix the whitespace,
nor complete the code movement (these are done in subsequent patches)
but it should contain all the functional changes.
Currently, we only properly escape stashed id queries, but there are
other places where the Emacs UI constructs queries for boolean terms.
Since this escaping function is meant to be used in other places, it
avoids escaping strings that don't need escaping.
Emacs 24's mm-shr HTML email renderer fails to load gnus-art before
referencing gnus-inhibit-images, resulting in a void-variable error
when notmuch attempts to render an HTML email with inline images.
This works around this bug by advising mm-shr to load gnus-art.
mm-shr is the only function outside of gnus-art itself that references
gnus-inhibit-images, so this workaround should be correct. If this
ever changes, hopefully they will have fixed this bug upstream first.
This fixes the "Rendering HTML mail with images" test for Emacs 24.
notmuch-hello (called also through notmuch-hello-update, bound to '='
by default) tries to find the widget under or following point before
refresh, and put the point back to the widget afterwards. The code has
grown quite complicated, and has at least the following issues:
1) All the individual section functions have to include code to
support point placement. If there is no such support, point is
dropped to the search box. Only saved searches and all tags
sections support point placement.
2) Point placement is based on widget-value. If there are two widgets
with the same widget-value (for example a saved search with the
same name as a tag) the point is moved to the earlier one, even if
point was on the later one.
3) When first entering notmuch-hello notmuch-hello-target is nil, and
point is dropped to the search box.
Moving the point to the search box is annoying because the user is
required to move the point before being able to enter key bindings.
Simplify the code by removing all point placement based on widgets, as
it does not work properly, and trying to fix that would unnecessarily
complicate the code.
Save current line and column before refresh, and restore them
afterwards. Sometimes, if notmuch-show-empty-saved-searches is nil,
and the refresh adds or removes saved searches from the list, this has
the appearance of moving the point relative to the nearest
widgets. This is a much smaller and less frequent problem than the
ones listed above.
Since marking a message as read can now be a user customized set of
tag changes, make reversing this easier. Allow a prefix argument to
notmuch-show-mark-read to reverse the marking as read, similar to the
unarchiving in notmuch-show-archive-message.
While at it, update the relevant documentation to match that of other
automatic tagging (i.e. archive and reply).
Since archiving a thread can now be a user customized set of tag
changes, make reversing this easier. Allow a prefix argument to
notmuch-search-archive-thread to reverse the archiving, similar to the
unarchiving in notmuch-show-archive-message.
Add support for customization of the tag changes that are applied when
a message or a thread is archived. Instead of hard-coded removal of
the "inbox" tag, the user can now specify a list of tag changes to
perform.
* emacs/notmuch.el (notmuch-search-mode):
`notmuch-search-tag-all' currently uses the current query string
instead of `notmuch-search-find-thread-id-region-search', which
might cause a race condition.
The `notmuch-show-mark-read-tags' lists tags that are to be applied when
message is read. By default, the only value is "-unread" which will remove
the unread tag. Among other uses, this variable can be used to stop
notmuch-show from modifying tags when message is shown (by setting the
variable to an empty list).
Previously, notmuch-show-previous-message would move to the beginning
of the message before the message containing point. This patch makes
it instead move to the previous message *boundary*. That is, if point
isn't already at the beginning of the message, it moves to the
beginning of the current message. This is consistent with
notmuch-show-next-message, which can be thought of as moving to the
next message boundary. Several people have expressed a preference for
this.
The recent change to use json for notmuch-search.el introduced a bug
in the code for keeping position on refresh. The problem is a
comparison between (plist-get result :thread) and a thread-id returned
by notmuch-search-find-thread-id: the latter is prefixed with
"thread:"
We fix this by adding an option to notmuch-search-find-thread-id to
return the bare thread-id. It appears that notmuch-search-refresh-view
is the only caller of notmuch-search that supplies a thread-id so this
change should be safe (but could theoretically break users .emacs
functions).
Previously, the Emacs byte compiler produced the warning
the function `remove-if-not' might not be defined at runtime.
because we only required cl at compile-time (not runtime). This fixes
this warning by requiring cl at runtime, ensuring that the definition
of remove-if-not is available.
The pipe message function (when used with a prefix) uses a search of
the form "id:<id1> or id:<id2>" etc. Since the user says precisely
which messages are wanted by opening them it should not use excludes.
In commit 5d0883e the function notmuch-search-next-thread was changed.
In particular it only goes to the next message if there is a next
message. This breaks notmuch-show-archive-thread-then-next. Fix this
by going to the "next" message whenever we are on a current message.
At this point, the only remaining functions that don't support
multi-line search result formats are the thread navigation functions.
This patch fixes that by rewriting them in terms of
notmuch-search-result-{beginning,end}.
This changes the behavior of notmuch-search-previous-thread slightly
so that if point isn't at the beginning of a result, it first moves
point to the beginning of the result.
Previously we ignored any notmuch-search-result-format customizations
for tag formatting because we needed to be able to parse back in the
result line and update the tags in place. We no longer do either of
these things, so we can allow customization of this format.
(Coincidentally, previously we still allowed too much customization of
the tags format, since moving it earlier on the line or removing it
from the line would interfere with the tagging mechanism. There is
now no problem with doing such things.)
Since the result object contains everything that the other text
properties recorded, we can remove the other text properties and
simply look in the plist of the appropriate result object.
This simplifies the traversal of regions of results and eliminates the
need for save-excursions (which tend to get in the way of maintaining
point when we make changes to the buffer). It also fixes some strange
corner cases in the old line-based code where results that bordered
the region but were not included in it could be affected by region
commands. Coincidentally, this also essentially enables multi-line
search result formats; the only remaining non-multi-line-capable
functions are notmuch-search-{next,previous}-thread, which are only
used for interactive navigation.
Now that we keep the full thread result object, we can refresh a
result after any changes by simply deleting and reconstructing the
result line from scratch.
A convenient side-effect of this wholesale replacement is that search
now re-applies notmuch-search-line-faces when tags change.
Previously, tag-based search result highlighting was done by creating
an overlay over each search result. However, overlays have annoying
front- and rear-advancement semantics that make it difficult to
manipulate text at their boundaries, which the next patch will do.
They also have performance problems (creating an overlay is linear in
the number of overlays between point and the new overlay, making
highlighting a search buffer quadratic in the number of results).
Text properties have neither problem. However, text properties make
it more difficult to apply multiple faces since, unlike with overlays,
a given character can only have a single 'face text property. Hence,
we introduce a utility function that combines faces into any existing
'face text properties.
Using this utility function, it's straightforward to apply all of the
appropriate tag faces in notmuch-search-color-line.
notmuch-message-mark-replied used "apply" to change message tags
according to notmuch-message-replied-tags after sending a reply. This
works if the latter is a single-element list. But with the recently
changed format of tag changes, it breaks for multiple-element lists.
Use "funcall" to properly pass the list of tag changes as a single
argument.
The JSON format eliminates the complex escaping issues that have
plagued the text search format. This uses the incremental JSON parser
so that, like the text parser, it can output search results
incrementally.
This slows down the parser by about ~4X, but puts us in a good
position to optimize either by improving the JSON parser (evidence
suggests this can reduce the overhead to ~40% over the text format) or
by switching to S-expressions (evidence suggests this will more than
double performance over the text parser). [1]
This also fixes the incremental search parsing test.
This has one minor side-effect on search result formatting.
Previously, the date field was always padded to a fixed width of 12
characters because of how the text parser's regexp was written. The
JSON format doesn't do this. We could pad it out in Emacs before
formatting it, but, since all of the other fields are variable width,
we instead fix notmuch-search-result-format to take the variable-width
field and pad it out. For users who have customized this variable,
we'll mention in the NEWS how to fix this slight format change.
[1] id:"20110720205007.GB21316@mit.edu"
This parser is designed to read streaming JSON whose structure is
known to the caller. Like a typical JSON parsing interface, it
provides a function to read a complete JSON value from the input.
However, it extends this with an additional function that
requires the next value in the input to be a compound value and
descends into it, allowing its elements to be read one at a time
or further descended into. Both functions can return 'retry to
indicate that not enough input is available.
The parser supports efficient partial parsing, so there's no need to
frame the input for correctness or performance.
The bulk of the parsing is still done by Emacs' json.el, so any
improvements or optimizations to that will benefit the incremental
parser as well.
Currently only descending into JSON lists is supported because that's
all we need, but support for descending into JSON objects can be added
in the future.
Rather than passing lots of arguments and then further passing those
to `notmuch-search-insert-field', pass a plist containing all of the
search result information. This plist is compatible with the JSON
format search results.
This is a simpler place to do this, since we can avoid any point
motion and hence any save-excursions in
`notmuch-search-process-filter', which in turn lets us put all of the
search-target logic outside of any save-excursions.
`notmuch-search-show-{result,error}' are now responsible for their own
point motion.
`notmuch-search-process-filter' could use some reindentation after
this, but we're about to rewrite it entirely, so we won't bother.
This removes the last bit of direct output from the parsing function.
With the parser now responsible solely for parsing, we can swap it out
for another parser.
Previously, much of the display of search lines was done in the same
function that parsed the CLI's output. Now the parsing function only
parses, and notmuch-search-show-result fully inserts the search result
in the search buffer.
This introduces a variable to control after how many characters a line
is wrapped by notmuch-wash-wrap-long-lines (still wrapping at the
window width if it is lower).
Previously the elide messages code got the entire-thread from
notmuch-show.c and then threw away all non-matching messages. This
version calls notmuch-show.c without the --entire-thread flag so
it never receives the non-matching messages in the first place.
This makes it substantially faster.
Allow the user to pipe the attachment somewhere. Bound to '|' on the
attachment button.
Signed-off-by: Jameson Graef Rollins <jrollins@finestructure.net>
Previously, the timestamp at the beginning of the FCC unique maildir
name was derived incorrectly, thanks to an integer overflow. This
changes the derivation of timestamp to use a float, and so will get
the number correct at least until 2038. (It is still formatted with
"%d" so it will show up as an integer.) Should we need to change it in
the next 26 years to take the unix millenium into account, it will be
invisible to users.
This change is mostly a question of consistency, since the unique name
is arbitrary anyway. But since most people use timestamps, and that was
the original intention here as well, we might as well.
Signed-off-by: Jesse Rosenthal <jrosenthal@jhu.edu>
It was decided in the thread starting at [0] that it is okay for
notmuch to use 'cl runtime functions. However, by default, these
produce byte compiler warnings. This suppresses those using
file-local variables.
[0] id:"m262g864dz.fsf@wal122.wireless-pennnet.upenn.edu"
When mail message is read from emacs, the message structure
obtained may contain parts which have content included
(`text/plain` for example) and other parts where content is not
included (`text/html` for example).
In case content is included, the string is already available in
emacs' internal format and therefore mm-... functions should not
attempt to do further decoding for the data in temp buffer
provided for it.
Currently when reply buffer is created,
notmuch-mm-display-part-inline () is used to provided quoted reply
content. This change makes the mm-... functions called by it use
'gnus-decoded as charset whenever the content is already available.
File .../emacs-23.3/lisp/gnus/mm-uu.el mentions:
"`gnus-decoded' is a fake charset, which means no further decoding."
The customization widget referred to a non-existing function
`notmuch-hello-insert-query-list'. The patch changes it to the
correct one - `notmuch-hello-insert-searches'. The relevant test is
fixed now.
Sometimes, notmuch reply outputs something to stderr, for example:
"Failed to verify signed part: Cannot verify multipart/signed part:
unsupported signature protocol". When this happens, replying in emacs
fails, because emacs cannot parse the error message as JSON.
This patch causes emacs to ignore stderr when reading reply from
notmuch.
Introduce a new defcustom notmuch-mua-compose-in that allows users to
specify where new mails are composed, either in the current window or
in a new window or frame.
Signed-off-by: Jameson Rollins <jrollins@finestructure.net>
Quote non-text parts nicely by displaying them with mm-display-part
before calling message-cite-original to quote them. HTML-only emails
can now be quoted correctly. We re-use some code from notmuch-show
(notmuch-show-mm-display-part-inline), which has been moved to
notmuch-lib.el.
Mark the test for this feature as not broken.
The main change here is to modify argument parsing so as to not force
tag-changes to be a list, and to let notmuch-tag handle prompting the
user when required. doc strings are also updated and cleaned up.
The main change here is to modify argument parsing so as to not force
tag-changes to be a list, and to let notmuch-tag handle prompting the
user when required. doc strings are also updated and cleaned up.
notmuch-tag is extended to accept various formats of the tag changes.
In particular, user prompting for tag changes is now incorporated
here, so it is common for modes.
The tag binary and the notmuch-{before,after}-tag-hooks are only
called if tag changes is non-nil.
In all cases tag-changes is returned as a list.
