Add compose command ("attach-key") to attach the public key associated
with the sending account. Public key is attached in ascii armor format,
with the mimetype set according to RFC 3156 ("application/pgp-keys").
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Tested-by: Koni Marti <koni.marti@gmail.com>
Add check for public keys of all message recipients (to, cc, and bcc)
before sending the message. Adds an OnFocusLost callback to header
editors to facilitate a callback for checking keys whenever a new
recipient is added (OnChange results in too many keyring checks).
Once encryption is initially set, the callbacks are registered. If a
public key is not available for any recipient, encryption is turned off.
However, notably, the callbacks are still registered meaning as s soon
as the user removes the recipients with missing keys, encryption is
turned back on.
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Tested-by: Koni Marti <koni.marti@gmail.com>
Unmark deleted messages and remove pending headers in the callback
function when an error in the backend occurs (e.g. due to connection
issues).
The message store marks messages that should be deleted. If the delete
operation in the backend fails, messages are never unmarked and will
remain rendered as empty lines in the message list. This also affects
the move and archive commands that rely on a copy and delete operation.
A similar issue occurs with the pending headers when the operation to
fetch them fails. In this case, messages will appear as loading
indefinitely in the message list and are never re-fetched because the
corresponding pending headers from the failed operations are still
present.
Fixes: https://todo.sr.ht/~rjarry/aerc/28
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
The gpg decrypt function was catching errors but not returning them.
This patch returns errors that are caught instead of aerc panicking.
Reported-by: ReK2 <rek2@hispagatos.org>
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Tested-by: ReK2 <rek2@hispagatos.org>
Acked-by: Robin Jarry <robin@jarry.cc>
Check that the signing key exists when the user issues the :sign
command. The signing key ID will be displayed in the security status
also, allowing the user to see what key will be used to sign the
message.
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Tested-by: Jens Grassel <jens@wegtam.com>
Add the format specifier %N to the dirlist-format to display compacted
folder names.
A folder such as INBOX/WORK/PROJECT will be compacted to I/W/PROJECT in
the directoy list.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Tested-by: Tim Culverhouse <tim@timculverhouse.com>
aerc panics when using macOS's default terminal emulator, Terminal.app,
when closing all but aerc's tab:
This error was also written to: /tmp/aerc-crash-20220427-194134.log
panic: Attempted to create context with negative offset [recovered]
panic: Attempted to create context with negative offset
goroutine 1 [running]:
git.sr.ht/~rjarry/aerc/logging.PanicHandler()
/Users/ckuehl/src/aerc/logging/panic-logger.go:47 +0x58c
panic({0x100d077a0, 0x14000032700})
/opt/homebrew/Cellar/go/1.18.1/libexec/src/runtime/panic.go:844 +0x258
git.sr.ht/~rjarry/aerc/lib/ui.(*Context).Subcontext(0x1400013e420?, 0x14000202360?, 0x140000ffc48?, 0x1009a10e4?, 0x100da9440?)
/Users/ckuehl/src/aerc/lib/ui/context.go:47 +0x160
git.sr.ht/~rjarry/aerc/lib/ui.(*Grid).Draw(0x1400013e420, 0x14000202360)
/Users/ckuehl/src/aerc/lib/ui/grid.go:143 +0x2bc
git.sr.ht/~rjarry/aerc/widgets.(*Aerc).Draw(0x1400013e4d0, 0x14000202360)
/Users/ckuehl/src/aerc/widgets/aerc.go:178 +0x30
git.sr.ht/~rjarry/aerc/lib/ui.(*UI).Tick(0x1400022bcc0)
/Users/ckuehl/src/aerc/lib/ui/ui.go:116 +0x248
main.main()
/Users/ckuehl/src/aerc/aerc.go:226 +0x9e8
I'm not entirely sure what the interactions are between the terminal
emulator, aerc's grid, and the space that moves around when the tab bar
disappears because there are no more tabs, but this fixes the issue 100%
of the time and I haven't noticed any issues.
Signed-off-by: Connor Kuehl <cipkuehl@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
This commit adds gpg system integration. This is done through two new
packages: gpgbin, which handles the system calls and parsing; and gpg
which is mostly a copy of emersion/go-pgpmail with modifications to
interface with package gpgbin. gpg includes tests for many cases, and
by it's nature also tests package gpgbin. I separated these in case an
external dependency is ever used for the gpg sys-calls/parsing (IE we
mirror how go-pgpmail+openpgp currently are dependencies)
Two new config options are introduced:
* pgp-provider. If it is not explicitly set to "gpg", aerc will default to
it's internal pgp provider
* pgp-key-id: (Optionally) specify a key by short or long keyId
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
This commit refactors the internal PGP implementation to make way for
GPG integration.
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Ensure CRLF line endings in the pgpmail reader. Fix the pgp signature
verification for maildir and notmuch.
These backends do not return the full message body with CRLF
line endings. But the accepted OpenPGP convention is for signed data to
end with a <CR><LF> sequence (see RFC3156).
If this is not the case the signed and transmitted data are considered
not the same and thus signature verification fails.
Link: https://datatracker.ietf.org/doc/html/rfc3156
Reported-by: Tim Culverhouse <tim@timculverhouse.com>
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Tested-by: Tim Culverhouse <tim@timculverhouse.com>
Refactor statusline by clearly separating the rendering part from the
text display. Use printf-like format string for statusline
customization.
Document printf-like format string to customize the statusline.
Allow to completely mute the statusline (except for push notifications)
with a format specifier.
Provide a display mode with unicode icons for the status elements.
Implements: https://todo.sr.ht/~rjarry/aerc/34
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Keep current message selected when clearing or changing filters and when
toggling threads.
Add -s flag to the clear command to also clear the selected message and
set cursor to the top of the message list.
Implements: https://todo.sr.ht/~rjarry/aerc/36
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Use contextual ui styleset for tabs and compose widgets. If no account
is selected, use default styleset as fallback.
Fixes: https://todo.sr.ht/~rjarry/aerc/3
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Fix the "no envelope available for this message" error that can occur
when using the same imap mailbox in another mailclient (e.g.
through a webmail interface) at the same time.
Complements the fixes in commit 7fe7fe4 ("ui: fix panic in header
formatter") and commit 074b0a1 ("view,list: fix crash when viewing
incomplete imap messages").
The error is caused when a message attribute update is received by the
message store before the message list had a chance to fetch the proper
header first. In this case, an (incomplete) message info is stored in
the message store and the message list will never fetch the correct
header. To prevent this, add only messages to the store with a non-nil
envelope but make sure that message attribute updates are properly
merged.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Sort the message list even when a filter is applied according to the
sort criteria given by the sort command.
Currently, the sort command has no effect when a filter is in use.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Keep the sort criteria applied to the selected folder until the default
sort order should be restored. Call the sort command without arguments
to restore the default sort order.
The current behavior is that the default sort order is restored as soon
as the folder reloads. This happens often and then the results of the
sort command are lost. This makes the sort command not very
user-friendly. Instead, we should keep the sort criteria applied until
the user explicitly wants to restore the default sort order again.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
This callback is actually invoked in a goroutine by time.AfterFunc. The
panic handler must be explicitly installed.
Link: https://github.com/golang/go/blob/go1.18/src/time/sleep.go#L160-L173
Signed-off-by: Robin Jarry <robin@jarry.cc>
Acked-by: Moritz Poldrack <moritz@poldrack.dev>
Fix order in the references header when an in-reply-to msg-id is
erroneously added at the beginning instead of at the end. Add
description to the function that cleans up the reference headers for
threading.
Reported-by: Evan Gates <evan.gates@gmail.com>
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Since panics still regularly "destroy" the terminal, it is hard to get a
stack trace for panics you do not anticipate. This commit adds a panic
handler that automatically creates a logfile inside the current working
directory.
It has to be added to every goroutine that is started and will repair
the terminal on a panic.
Signed-off-by: Moritz Poldrack <git@moritz.sh>
Acked-by: Robin Jarry <robin@jarry.cc>
Make statusline folder-specific. Update filter, search and threading
status when changing folders.
Commit 2512c04 ("statusline: implement per-account status") introduced
an account-specific statusline. This makes it account- and
folder-specific.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Tested-by: Moritz Poldrack <moritz@poldrack.dev>
Fix stack overflow from faulty headers that cause a circularity in the
threading algorithm. Remove duplicated message-ids in the references
headers. Check that the message-id itself is not part of the references.
Fixes: https://todo.sr.ht/~rjarry/aerc/32
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Tested-by: Robin Jarry <robin@jarry.cc>
Acked-by: Robin Jarry <robin@jarry.cc>
Update message counter in msglist when the filter is changed (either set or
cleared in the msgstore).
When we apply a filter, we change the number of uids in the message
store. This can unintentionally trigger the storeUpdate() function of
the msglist which checks the number of uids for new messages and
advances the pointer by the difference in the number of messages. This
can be avoided when we update the message counter upon changing the
filter.
Fixes: https://todo.sr.ht/~rjarry/aerc/23
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Implement a statusline state for each account. Keep the ex line and the
push notifications global. Add account name prefix to push
notifications. Prefix status line with account name when multiple
accounts are available.
Use account-specific status line for each tab where an account is
defined.
Handle threading, filter/search, viewer passthrough and connection
status.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
This commit fixes all occurrences of the abovementioned lint-error in
the codebase.
Signed-off-by: Moritz Poldrack <git@moritz.sh>
Acked-by: Robin Jarry <robin@jarry.cc>
Enable consecutive filter and search queries. Filter narrows down
message list consecutively and clears search results. Search applies to
the current message list.
Fixes: https://todo.sr.ht/~rjarry/aerc/24
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Tested-by: Inwit <inwit@sindominio.net>
Tested-by: Moritz Poldrack <git@moritz.sh>
Acked-by: Robin Jarry <robin@jarry.cc>
Apply the user-defined sort criteria to the message with the highest
uid in a threaded discussion. Restore the default sort order when
leaving threading mode.
Commit 7811620eb8 ("threading: implement on-the-fly message
threading") introduced message threading with the threaded messages
being only sorted by their message uids irrespective of the defined sorting
criteria. It did not restore the default sort order either.
Reported-by: Sebastien Binet <s@sbinet.org>
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
The kept socket after crashes or unclean exits can lead to a unexpected
behaviour. This commit just removes dangling sockets if they exist.
Since the "does not exist" error is the best case scenario error
handling was deemed unnecessary.
Signed-off-by: Moritz Poldrack <git@moritz.sh>
Acked-by: Robin Jarry <robin@jarry.cc>
implement message threading on the message store level using the
jwz algorithm. Build threads on-the-fly when new message headers arrive.
Use the references header to create the threads and the in-reply-to
header as a fall-back option in case no references header is present.
Does not run when the worker provides its own threading (e.g. imap
server threads).
Include only those message headers that have been fetched and are
stored in the message store.
References: https://www.jwz.org/doc/threading.html
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Tested-by: Inwit <inwit@sindominio.net>
Tested-by: akspecs <akspecs@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Instead of using a static SHAREDIR at compile time, use a list of
standard paths to use at runtime for templates, config files and
stylesets.
This implies removing all default filters in the default configuration.
Replace them with basic commands. New users can configure the filters as
they wish.
Signed-off-by: Robin Jarry <robin@jarry.cc>
fetches missing headers when in visual selection mode. This prevents
large archive operations from panicking due to a nil pointer
dereference.
The archive command will return an error to the ui when a nil message is
encountered to signal that the message store is not ready yet.
Signed-off-by: Koni Marti <koni.marti@gmail.com>
as per the discussion https://lists.sr.ht/~sircmpwn/aerc/patches/15367
this handles completions in `completer/completer.go` by enabling the
completer to return a `prefix` that will be prepended to the selected
completion candidate.
implements PGP/MIME encryption with go-pgpmail. The Encrypt() function of
go-pgpmail requires a list of public keys which are taken from the
keystore. The keystore is searched for the email addresses of all
recipients (to, cc, and bcc).
If you want to be able to read the encrypted email afterwards, add
yourself as a recipient in either to, cc, or bcc as well.
Public keys can be exported from gpg into aerc as follows:
$ gpg --export >> ~/.local/share/aerc/keyring.asc
When composing a message, the encryption is enabled with the
":encrypt" command. This sets a bool flag in the Composer struct.
A reapted application of this command will toggle the flag.
The encrypted message can also be signed by using the ":sign"
command before or after ":encrypt".
References: https://todo.sr.ht/~rjarry/aerc/6
Signed-off-by: Koni Marti <koni.marti@gmail.com>
implements PGP/MIME signing with go-pgpmail. The Sign() function of
go-pgpmail requires a private (signing) key. The signing key which matches
the senders email address (from field in email header) is looked up
in aerc's copy of the keyring.
Private keys can be exported from gpg into aerc as follows:
$ gpg --export-secret-keys >> ~/.local/share/aerc/keyring.asc
A message is signed with the ":sign" command. The sign command sets
a bool flag in the Composer struct. Using the command repeatedly will
toggle the flag.
References: https://todo.sr.ht/~rjarry/aerc/6
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Replaces golang.org/x/crypto with github.com/ProtonMail/go-crypto
consistently and updates go-pgpmail to v0.2.0
Signed-off-by: Koni Marti <koni.marti@gmail.com>
There was a change in how build tags are formatted. Use this as new
reference.
Link: https://go.dev/doc/go1.17#gofmt
Signed-off-by: Robin Jarry <robin@jarry.cc>
Fix the following build error on mac os:
worker/imap/worker.go:368:29: undefined: syscall.TCP_KEEPCNT
worker/imap/worker.go:376:29: undefined: syscall.TCP_KEEPINTVL
These symbols are not defined on darwin.
Fixes: 5dfeff75f3 ("imap: add tcp connection options")
Signed-off-by: Robin Jarry <robin@jarry.cc>
New border-char-horizontal and border-char-vertical config settings in
aerc.conf allow users to modify border appearance from the default
1-wide/tall blank space. In stylesets, border.fg now affects the
foreground color when custom characters are defined.
Signed-off-by: Robin Jarry <robin@jarry.cc>
Display threads in the message list. For now, only supported by the
notmuch backend and on IMAP when the server supports the THREAD
extension.
Setting threading-enable=true is global and will cause the message list
to be empty with maildir:// accounts.
Co-authored-by: Kevin Kuehler <keur@xcf.berkeley.edu>
Co-authored-by: Reto Brunner <reto@labrat.space>
Signed-off-by: Robin Jarry <robin@jarry.cc>
With IMAP, due to an unidentified reason, some messages to not have any
body accessible. When viewing them, aerc crashes:
git.sr.ht/~sircmpwn/aerc/lib.usePGP
lib/messageview.go:37
git.sr.ht/~sircmpwn/aerc/lib.NewMessageStoreView
lib/messageview.go:67
git.sr.ht/~sircmpwn/aerc/commands/account.ViewMessage.Execute
commands/account/view.go:45
git.sr.ht/~sircmpwn/aerc/commands.(*Commands).ExecuteCommand
commands/commands.go:66
main.execCommand
aerc.go:61
main.main.func2
aerc.go:160
aerc crashed: runtime error: invalid memory address or nil pointer
dereference
Check the pointer before dereferencing.
Also, add a global check in ParseMessageFormat where a similar issue may
occur.
Signed-off-by: Robin Jarry <robin@jarry.cc>
When composing a message, there is an empty fill line between the
headers and the text editor. The line is printed with the default style
which may cause users to assume it is part of the editor.
Display the fill lines with the border color to avoid confusion.
Signed-off-by: Robin Jarry <robin@jarry.cc>
When a message has been sent today (or this year) allow formatting the
date differently.
For example, with:
[ui]
index-format=%-25.25n %-25.25D %s
timestamp-format=2006 Jan 02, 15:04 GMT-0700
this-day-time-format=Today at 15:04
this-year-time-format=Jan 02
The message list would look like this (spaces collapsed):
Robin Jarry Today at 16:30 [PATCH 1/2] bindings: prepare for more modifers
bugzilla@dpdk.org Oct 26 [dpdk-dev] [Bug 839] pdump: any subsequent runs of pdump_autotest fail
Holger Levsen 2020 Mar 15, 13:44 GMT+01 +1 (Re: FTP Team -- call for volunteers)
Signed-off-by: Robin Jarry <robin@jarry.cc>
* Get rid of open_darwin
It just lead to code duplication for a simple one string change.
Instead we query it during initialization
* Accept user provided arguments
"open" on MacOS accepts things like -A to use a specific application
Pass trough arguments the user provided in order to facilitate this
* Refactor the function to a struct
This makes it more convenient for the caller and avoids signatures like
lib.OpenFile(nil, u.String(), nil) which are fairly unreadable
Also update to the tcell v2 PaletteColor api, which should keep the chosen
theme of the user intact.
Note, that if $TRUECOLOR is defined and a truecolor given, aerc will now stop
clipping the value to one of the theme colors.
Generally this is desired behaviour though.
Prior to this commit, the composer was based on a map[string]string.
While this approach was very versatile, it lead to a constant encoding / decoding
of addresses and other headers.
This commit switches to a different model, where the composer is based on a header.
Commands which want to interact with it can simply set some defaults they would
like to have. Users can overwrite them however they like.
In order to get access to the functions generating / getting the msgid go-message
was upgraded.
We made a new type out of go-message/mail.Address without any real reason.
This suddenly made it necessary to convert from one to the other without actually
having any benefit whatsoever.
This commit gets rid of the additional type
Go pre 1.15 parsed an empty string as an error, 1.15 did not but this was
unintentional as per https://github.com/golang/go/issues/40803
Fix the comment accordingly
Go 1.15 handles "" in the address parser as a non error case, returning
an empty list.
Prior versions returned an error, which is not what we want.
Reported-by: anianz <a.ziegler@cioplenu.de>
Tested-by: anianz <a.ziegler@cioplenu.de>
This allows us to hook into the std libs implementation of parsing related stuff.
For this, we need to get rid of the distinction between a mailbox and a host
to just a single "address" field.
However this is already the common case. All but one users immediately
concatenated the mbox/domain to a single address.
So this in effects makes it simpler for most cases and we simply do the
transformation in the special case.
This piggybacks on the existing IMAP support, and uses the same
configuration format (my local testing example has the IMAP and SMTP
lines almost copy-pasted from one another).
It's a little clumsy in that a new token is negotiated for every
`Send()` command, but it's a start...
If a message date would fail to parse, the worker would never receive
the MessageInfo it asked for, and so it wouldn't display the message.
The problem is the spec for date formats is too lax, so trying to ensure
we can parse every weird date format out there is not a strategy we want
to pursue. On the other hand, preventing the user from reading and
working with a message due to the error format is also not a solution.
The maildir and notmuch workers will now fallback to the internal date, which
is based on the received header if we can't parse the format of the Date header.
The UI will also fallback to the received header whenever the date header can't
be parsed.
This patch is based on the work done by Lyudmil Angelov <lyudmilangelov@gmail.com>
But tries to handle a parsing error a bit more gracefully instead of just returning
the zero date.
Introduce the ability to configure stylesets, allowing customization of
aerc's look (color scheme, font weight, etc). Default styleset is
installed to /path/to/aerc/stylesets/default.
Introduce the ability to configure stylesets, allowing customization of
aerc's look (color scheme, font weight, etc). Default styleset is
installed to /path/to/aerc/stylesets/default.
Aerc usually used the path []int{1} if it didn't know what the proper path is.
However this only works for multipart messages and breaks if it isn't one.
This patch removes all the hard coding and extracts the necessary helpers to lib.
More mail flags can now be set, unset, and toggled, not just the
read/seen flag.
This functionality is implemented with a new `:flag` and `:unflag`
command, which are extensions to the matching `:read` and `:unread`
commands, adding support for different flags. In fact, the
`read`/`unread` commands are now recognized aliases to `flag`/`unflag`.
The new commands are also well documented in aerc(1).
The change mostly extends the previous read/unread setting functionality
by adding a selection for the flag to change.
This stops the ui being blocked while the resource is opened. The wait
ensures that resources are reclaimed when the process finishes while
aerc is still running.
The data was passed around as a string for some reason, which led to time
precision loss and wrong dates being displayed.
Simply pass the time as is to fix that.
The grid used static sizes which meant that changing settings didn't
have an effect on elements of the ui, notably the sidebar width. This
patch makes the `Size` parameter of a cell a function which returns the
`int`, allowing for dynamic sizes.
A `Const` function is also included for ease of use for static sizes.
The following functionalities are added to configure aerc ui styles.
- Read stylesets from file with very basic fnmatch wildcard matching
- Add default styleset
- Support different stylesets as part of UiConfig allowing contextual
styles.
- Move widgets/ui elements to use the stylesets.
- Add configuration manual for the styleset
Currently at least the notmuch and maildir worker only set messages as read
if a body part is fetched. The gpg abstraction however fetches the full message.
We can simply set the readstate when we create the messageview, avoiding the issue.
Once this is merged, we can cleanup both workers.
Due to headers being essentially free text, we constantly run into issues
with parts of the body being interpreted as headers.
Remove the ability to overwrite headers to avoid that, while keeping the ability
to specify headers in the template files.
Fixes#383
This adds the commands pin-tab and unpin-tab. Once pinned a tab lives on
the left of the tabstrip and has a configurable marker, defaulting to `
before its name.
This changes the ui to show the spinner while we are sorting. It only
shows one line of the spinner since there are an unknown number of
messages at this time.
Hi. This adds a template function to convert a time to the local time zone. And modifies
the default quoted_reply template to use it and show the time zone when formatting the
timestamp of the quoted message.
Previously, the quoted message timestamp was UTC and it would format it without the time
zone. And I thought it might be a little confusing or weird to some normal people when I
email them and I don't want normal people to be confused or think that I'm weird.
Apparently sending an event for every incoming messageInfo slows down
the application significantly.
Therefore this slows down the emmision rate, on the cost of being out of date
in some cases.
This reverts commit bd4df53009.
I did not properly untangle the opening / dirlist update of each other.
This interferes with the imap worker, hence the revert
Actions such as read / unread or the addition of new messages do change
the read/unread/recent count. Hence we request an update from the workers.
Workers going over the network should probably cache the information and invalidate
it only if necessary
Previously, sending a DirectoryInfo assumed that a directory change
happened. However we don't want that if we only want to update the
unread message count.
If the message doesn't contain ':', we don't properly discard the
message, so we end up slicing it like msg[:-1].
This can be reproduced if one runs 'aerc foo', as the server receives
'foo' as the message.
'aerc foo' still doesn't do anything very user friendly, but at least it
doesn't panic horribly.
While at it, do the 'got message' log at the very beginning, so that the
user can see what message the server got before reporting the command as
invalid.
Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
