aerc: Add configuration to replace neomutt usage

Starting to replace neomutt in my workflow with aerc:
it is a little more lightweight, directly supports notmuch directories
and has a relatively sane configuration style (mostly just ini-like)
with 'go-templating' baked in.

In general, the configuration just feels less 'cobbled-together' than
before. I can make changes without worrying what other things are going
to break by doing so. I understand the complete configuration and
styling, instead of mostly relying on other people's formatting lines
for the styles.

I am still learning some of the configuration possibilities but it
already functions as a neomutt replacement.

office/.config/aerc/aerc.conf

@@ -0,0 +1,68 @@
+[general]
+enable-osc8 = true
+
+[ui]
+dirlist-tree = true
+fuzzy-complete = true
+dialog-position = bottom
+
+styleset-name = simple
+
+index-columns = flags>4,name<20%,subject,date>=
+this-week-time-format = Mon 02
+sidebar-width = 15
+
+threading-enabled = true
+reverse-thread-order = true
+show-thread-context = true
+thread-prefix-folded = "+ "
+thread-prefix-tip = ""
+thread-prefix-indent = ""
+thread-prefix-stem = "│"
+thread-prefix-limb = "─"
+thread-prefix-folded = "+"
+thread-prefix-unfolded = ""
+thread-prefix-first-child = "┬"
+thread-prefix-has-siblings = "├"
+thread-prefix-orphan = "┌"
+thread-prefix-dummy = "┬"
+thread-prefix-lone = " "
+thread-prefix-last-sibling = "╰"
+
+[statusline]
+column-left = [{{.Account}}] {{cwd}} {{.ContentInfo}}
+column-right = {{.TrayInfo}} | {{dateFormat now "Mon Jan 2 15:04:05 2006"}}
+
+[viewer]
+
+[compose]
+file-picker-cmd = vifm --choose-files -
+reply-to-self = false
+empty-subject-warning = true
+no-attachment-warning = ^[^>]*(attach(ed|ment)|an(ge)?hang)
+
+[multipart-converters]
+text/html=pandoc -f commonmark_x -t html --standalone --embed-resources --template email
+# TODO: change to djot when new pandoc version in repos
+
+[filters]
+.filename,~.*.ics = calendar
+text/plain                              = wrap -w 100 | colorize
+text/calendar                           = calendar
+message/delivery-status                 = colorize
+message/rfc822                          = colorize
+text/html                               = pandoc -f html -t plain
+application/pdf                         = pdftotext - -l 10 -nopgbrk -q - | wrap -w 100
+application/msword                      = pandoc -f docx -t plain
+application/vnd.openxmlformats-officedocument.wordprocessingml.document = pandoc -f docx -t plain
+application/vnd.oasis.opendocument.text = pandoc -f odt -t plain
+.headers                                = colorize
+# text/html                             = ! html # ! for interactive applications
+
+[openers]
+# does not have filename checking for openers?
+.filename,~.*.ics = wezterm -e nvim -
+
+[hooks]
+
+[templates]

office/.config/aerc/binds.conf

@@ -0,0 +1,218 @@
+# Binds are of the form <key sequence> = <command to run>
+# To use '=' in a key sequence, substitute it with "Eq": "<Ctrl+Eq>"
+# If you wish to bind #, you can wrap the key sequence in quotes: "#" = quit
+gT = :prev-tab<Enter>
+gt = :next-tab<Enter>
+<C-PgUp> = :prev-tab<Enter>
+<C-PgDn> = :next-tab<Enter>
+\[t = :prev-tab<Enter>
+\]t = :next-tab<Enter>
+<C-t> = :term<Enter>
+? = :help keys<Enter>
+<C-c> = :prompt 'Quit?' quit<Enter>
+<C-q> = :prompt 'Quit?' quit<Enter>
+<C-z> = :suspend<Enter>
+
+[messages]
+q = :quit<Enter> # quick quitting
+
+j = :next<Enter>
+\]m = :next<Enter>
+<Down> = :next<Enter>
+<C-d> = :next 50%<Enter>
+<C-f> = :next 100%<Enter>
+
+k = :prev<Enter>
+\[m = :prev<Enter>
+<Up> = :prev<Enter>
+<C-u> = :prev 50%<Enter>
+<C-b> = :prev 100%<Enter>
+gg = :select 0<Enter>
+G = :select -1<Enter>
+
+\]e = :next-folder<Enter>
+\[e = :prev-folder<Enter>
+\}e = :next-folder -u<Enter>
+\{e = :prev-folder -u<Enter>
+<C-Down> = :next-folder<Enter>
+<C-Up> = :prev-folder<Enter>
+H = :collapse-folder<Enter>
+L = :expand-folder<Enter>
+<C-Left> = :collapse-folder<Enter>
+<C-Right> = :expand-folder<Enter>
+
+gi = :cf Inbox<Enter>
+gs = :cf Sent<Enter>
+gd = :cf Drafts<Enter>
+ga = :cf Archive<Enter>
+gA = :cf All<Enter>
+gr = :cf Trash<Enter>
+
+v = :mark -t<Enter>
+V = :mark -V<Enter>
+J = :mark -t<Enter>:next<Enter>
+K = :mark -t<Enter>:prev<Enter>
+T = :prompt "Mark filter: " :mark<Enter>
+
+zt = :toggle-threads<Enter>
+zc = :fold<Enter>
+zC = :fold -a<Enter>
+zo = :unfold<Enter>
+zO = :unfold -a<Enter>
+za = :fold -t<Enter>
+zA = :fold -t -a<Enter>
+
+zz = :align center<Enter>
+zt = :align top<Enter>
+zb = :align bottom<Enter>
+
+<Enter> = :view<Enter>
+l = :view<Enter>
+
+# remove filters
+<Space>/ = :filter<Enter>
+<Space>\ = :filter<Enter>
+,F = :tag<Space>
+,s = :tag !unread<Enter>
+,u = :tag !urgent<Enter>
+,d = :tag !todo<Enter>
+,i = :tag !important<Enter>
+,f = :tag !flagged<Enter>
+,w = :tag !wait<Enter>
+,l = :tag !delegated<Enter>
+,j = :tag !junk<Enter>
+,J = :tag !junk<Enter>:archive flat<Enter>               # archive message as junk
+<space>s = :filter tag:unread<Enter>
+<space>u = :filter tag:urgent<Enter>
+<space>d = :filter tag:todo<Enter>
+<space>i = :filter tag:important or tag:flagged<Enter>
+<space>f = :filter tag:flagged<Enter>
+<space>w = :filter tag:wait<Enter>
+<space>l = :filter tag:delegated<Enter>
+
+d = :move Trash<Enter>
+D = :choose -o y 'Really delete this message' :delete<Enter>
+a = :archive flat<Enter>                                 # archive message
+A = :unmark -a<Enter>:mark -T<Enter>:archive flat<Enter> # archive thread
+M = :menu -d :move<Enter>                                # move mail
+
+m = :compose<Enter>
+f = :forward<Enter>
+F = :bounce<space>
+rr = :reply -a<Enter>
+rq = :reply -aq<Enter>
+rR = :reply<Enter>
+rQ = :reply -q<Enter>
+
+c = :cf<space>
+! = :term<space>
+| = :pipe<space>
+
+/ = :search<space>
+\ = :filter<space>
+n = :next-result<Enter>
+N = :prev-result<Enter>
+<Esc> = :clear<Enter>
+
+s = :split<Enter>
+S = :vsplit<Enter>
+
+# send mails to taskwarrior
+,t = :pipe -s -m neomutt-2task -c -d -t
+,T = :pipe -s -m neomutt-2task -c
+
+# # TODO: Investigate use
+# pl = :patch list<Enter>
+# pa = :patch apply <Tab>
+# pd = :patch drop <Tab>
+# pb = :patch rebase<Enter>
+# pt = :patch term<Enter>
+# ps = :patch switch <Tab>
+
+[messages:folder=Drafts]
+m = :recall<Enter>
+[messages:folder=Trash]
+d = :choose -o y 'Really delete this message' :delete<Enter>
+D = :delete<Enter>
+
+[view]
+/ = :toggle-key-passthrough<Enter>/
+q = :close<Enter>
+h = :close<Enter>
+O = :open<Enter>
+o = :open<Enter>
+S = :menu -c 'vifm --choose-dir - --on-choose exit' :save<Enter> # save current with
+| = :pipe<space>
+
+d = :move Trash<Enter>
+D = :choose -o y 'Really delete this message' :delete<Enter>
+a = :archive flat<Enter>                                 # archive message
+A = :unmark -a<Enter>:mark -T<Enter>:archive flat<Enter> # archive thread
+M = :menu -d :move<Enter>                                # move mail
+
+<C-y> = :copy-link <space>
+<C-l> = :open-link <space>
+
+m = :compose<Enter>
+f = :forward<Enter>
+F = :bounce<space>
+rr = :reply -a<Enter>
+rq = :reply -aq<Enter>
+rR = :reply<Enter>
+rQ = :reply -q<Enter>
+
+H = :toggle-headers<Enter>
+J = :next-part<Enter>
+K = :prev-part<Enter>
+<C-Up> = :prev-part<Enter>
+<C-Down> = :next-part<Enter>
+<C-n> = :next<Enter>
+<C-p> = :prev<Enter>
+<C-Right> = :next<Enter>
+<C-Left> = :prev<Enter>
+
+tr = :pipe trans -show-original n -b -no-autocorrect<Enter> # translate message
+
+[view::passthrough]
+$noinherit = true
+$ex = <C-x>
+<Esc> = :toggle-key-passthrough<Enter>
+
+[compose]
+# Keybindings used when the embedded terminal is not selected in the compose view
+$noinherit = true
+$ex = <C-x>
+$complete = <C-o>
+<C-Up> = :prev-field<Enter>
+<C-Down> = :next-field<Enter>
+<C-p> = :prev-field<Enter>
+<C-n> = :next-field<Enter>
+<tab> = :next-field<Enter>
+<backtab> = :prev-field<Enter>
+<A-p> = :switch-account -p<Enter>
+<A-n> = :switch-account -n<Enter>
+<C-Left> = :switch-account -p<Enter>
+<C-Right> = :switch-account -n<Enter>
+
+[compose::editor]
+# Keybindings used when the embedded terminal is selected in the compose view
+$noinherit = true
+$ex = <C-x>
+
+[compose::review]
+# Keybindings used when reviewing a message to be sent
+# Inline comments are used as descriptions on the review screen
+y = :send<Enter> # Send
+n = :abort<Enter> # Abort (discard message, no confirmation)
+s = :sign<Enter> # Toggle signing
+x = :encrypt<Enter> # Toggle encryption to all recipients
+v = :preview<Enter> # Preview message
+p = :postpone<Enter> # Postpone
+q = :choose -o d discard abort -o p postpone postpone<Enter> # Abort or postpone
+e = :edit<Enter> # Edit (body and headers)
+a = :attach -m<Enter> # Add attachment
+d = :detach<space> # Remove attachment
+
+[terminal]
+$noinherit = true
+$ex = <C-x>

office/.config/aerc/stylesets/simple

@@ -0,0 +1,14 @@
+# vim: ft=dosini
+#
+# aerc default styleset
+#
+# This styleset uses the terminal defaults as its base, by not setting anything.
+# For more details see the 'default' styleset in aerc, or the
+# aerc-stylesets(7) manpage.
+
+[user]
+attention.fg = 1
+accent.fg = 4
+highlight.fg = 3
+subdued.fg = 2
+subdued.dim = true