feat(home): configure aerc as mail client

2 files changed, 447 insertions, 0 deletions

diff --git a/modules/home/aerc.nix b/modules/home/aerc.nix
new file mode 100644
index 0000000..3ad9e6b
--- /dev/null
+++ b/modules/home/aerc.nix
@@ -0,0 +1,445 @@
+{ pkgs, ... }:
+
+let
+  # Nix store paths are world-readable, so accounts.conf (IMAP/SMTP passwords)
+  # stays hand-managed in ~/.config/aerc and out of this module.
+  opener = if pkgs.stdenv.isDarwin then "open" else "xdg-open";
+
+  # Renders the markdown body of a composed mail into the text/html half of a
+  # multipart/alternative message (see [multipart-converters] below).
+  mdToHtml = pkgs.writeShellScriptBin "aerc-md2html" ''
+    body=$(${pkgs.cmark-gfm}/bin/cmark-gfm \
+      --extension autolink \
+      --extension table \
+      --extension strikethrough \
+      --extension tasklist)
+
+    cat <<HTML
+    <!DOCTYPE html>
+    <html>
+    <head>
+    <meta charset="utf-8">
+    <meta name="color-scheme" content="light dark">
+    <style>
+    body { font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+           font-size: 15px; line-height: 1.5; color: #1a1a1a; background: #ffffff;
+           max-width: 40em; margin: 0; padding: 0; }
+    a { color: #2b5cd9; }
+    h1, h2, h3 { line-height: 1.25; margin: 1.2em 0 0.5em; }
+    h1 { font-size: 1.4em; }
+    h2 { font-size: 1.2em; }
+    h3 { font-size: 1.05em; }
+    p, ul, ol, table { margin: 0 0 1em; }
+    blockquote { margin: 0 0 1em; padding: 0 0 0 1em; border-left: 3px solid #d0d0d0; color: #555; }
+    code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9em; }
+    code { background: #f2f2f2; padding: 0.1em 0.3em; border-radius: 3px; }
+    pre { background: #f2f2f2; padding: 0.8em; border-radius: 4px; overflow-x: auto; }
+    pre code { background: none; padding: 0; }
+    table { border-collapse: collapse; }
+    th, td { border: 1px solid #d0d0d0; padding: 0.3em 0.6em; text-align: left; }
+    hr { border: none; border-top: 1px solid #d0d0d0; margin: 1.5em 0; }
+    @media (prefers-color-scheme: dark) {
+      body { color: #e6e6e6; background: #1a1a1a; }
+      a { color: #7aa2f7; }
+      blockquote { border-left-color: #444; color: #aaa; }
+      code, pre { background: #262626; }
+      th, td, hr { border-color: #444; }
+    }
+    </style>
+    </head>
+    <body>
+    $body
+    </body>
+    </html>
+    HTML
+  '';
+
+  notify =
+    if pkgs.stdenv.isDarwin then
+      # -activate focuses Ghostty when the banner is clicked.
+      "${pkgs.terminal-notifier}/bin/terminal-notifier"
+      + " -group \"aerc-$AERC_ACCOUNT\""
+      + " -title \"$AERC_ACCOUNT/$AERC_FOLDER\""
+      + " -subtitle \"$AERC_FROM_NAME\""
+      + " -message \"$AERC_SUBJECT\""
+      + " -activate com.mitchellh.ghostty"
+    else
+      "${pkgs.libnotify}/bin/notify-send"
+      + " \"[$AERC_ACCOUNT/$AERC_FOLDER] $AERC_FROM_NAME\""
+      + " \"$AERC_SUBJECT\"";
+in
+{
+  home.file = {
+    ".config/aerc/aerc.conf".text = ''
+      [general]
+      default-save-path=~/Downloads
+      pgp-provider=auto
+      default-menu-cmd=fzf --reverse --prompt='> '
+
+      [ui]
+      styleset-name=tokyonight
+      mouse-enabled=true
+      threading-enabled=true
+      fuzzy-complete=true
+      keyhint=true
+      keyhint-delay=300ms
+      sidebar-width=24
+      index-columns=flags:4,name<20%,subject,date>=
+      timestamp-format=2006-01-02 15:04
+      this-day-time-format=15:04
+      this-week-time-format=Mon 15:04
+      this-year-time-format=02 Jan
+      empty-message=(no messages)
+      empty-dirlist=(no folders)
+
+      [statusline]
+      column-left=[{{.Account}}] {{.StatusInfo}}
+      column-center={{.PendingKeys}}
+      column-right={{.TrayInfo}}
+
+      [viewer]
+      pager=less -Rc
+      alternatives=text/plain,text/html
+      show-headers=false
+      header-layout=From|To,Cc|Bcc,Date,Subject
+      parse-http-links=true
+
+      [compose]
+      editor=nvim -c 'set ft=mail' -c 'set textwidth=72' -c 'set nolist'
+      header-layout=To|From,Subject
+      focus-body=true
+      empty-subject-warning=true
+      no-attachment-warning=^[^>]*attach(ed|ment)
+
+      [multipart-converters]
+      text/html=${mdToHtml}/bin/aerc-md2html
+
+      [hooks]
+      mail-received=${notify}
+
+      [filters]
+      text/plain=colorize
+      text/calendar=calendar
+      message/delivery-status=colorize
+      message/rfc822=colorize
+      text/html=! html
+      .headers=colorize
+
+      [openers]
+      x-scheme-handler/http*=${opener} {}
+      x-scheme-handler/mailto=${opener} {}
+      text/html=${opener} {}
+      application/pdf=${opener} {}
+      image/*=${opener} {}
+    '';
+
+    ".config/aerc/binds.conf".text = ''
+      # Part/field navigation is bound twice: C-j/C-k as aerc ships them, plus
+      # ]p/[p and Alt-j/Alt-k (right Option = Alt, see modules/home/ghostty.nix)
+      # which keep working if vim-tmux-navigator's tmux side is ever installed,
+      # since it claims C-h/j/k/l for any pane that is not running vim.
+
+      <C-p> = :prev-tab<Enter>
+      <C-n> = :next-tab<Enter>
+      \[t = :prev-tab<Enter> # Previous tab
+      \]t = :next-tab<Enter> # Next tab
+      <C-t> = :term<Enter>
+      ? = :help keys<Enter>
+      <C-q> = :prompt 'Quit?' quit<Enter>
+      <C-z> = :suspend<Enter>
+
+      [messages]
+      q = :prompt 'Quit?' quit<Enter>
+      . = :repeat
+
+      j = :next<Enter>
+      <Down> = :next<Enter>
+      k = :prev<Enter>
+      <Up> = :prev<Enter>
+      <C-d> = :next 50%<Enter>
+      <C-u> = :prev 50%<Enter>
+      <C-f> = :next 100%<Enter>
+      <C-b> = :prev 100%<Enter>
+      <PgDn> = :next 100%<Enter>
+      <PgUp> = :prev 100%<Enter>
+      gg = :select 0<Enter> # First message
+      G = :select -1<Enter>
+      zz = :align center<Enter>
+      zt = :align top<Enter>
+      zb = :align bottom<Enter>
+
+      J = :next-folder<Enter>
+      K = :prev-folder<Enter>
+      gi = :cf INBOX<Enter> # Inbox
+      ga = :cf Archive<Enter> # Archive
+      gd = :cf Drafts<Enter> # Drafts
+      gs = :cf Sent<Enter> # Sent
+      gj = :cf Junk<Enter> # Junk
+      gt = :cf Trash<Enter> # Trash
+      gf = :menu -dc fzf :cf<Enter> # Find folder (fzf)
+      c = :cf<space>
+
+      <Enter> = :view<Enter>
+      v = :mark -t<Enter>
+      <Space> = :mark -t<Enter>:next<Enter>
+      V = :mark -v<Enter>
+      tt = :toggle-threads<Enter> # Threads
+      ts = :toggle-sidebar<Enter> # Sidebar
+      tf = :toggle-folder<Enter> # Folder subscription
+      tc = :toggle-thread-context<Enter> # Thread context
+      zc = :fold<Enter>
+      zo = :unfold<Enter>
+      za = :fold -t<Enter>
+      zM = :fold -a<Enter>
+      zR = :unfold -a<Enter>
+      <tab> = :fold -t<Enter>
+
+      C = :compose<Enter>
+      r = :reply -aq<Enter>
+      R = :reply -q<Enter>
+      f = :forward<Enter>
+      b = :bounce<space>
+      d = :choose -o y 'Really delete this message' delete-message<Enter>
+      D = :delete<Enter>
+      a = :archive flat<Enter>
+      A = :unmark -a<Enter>:mark -T<Enter>:archive flat<Enter>
+      M = :move<space>
+      mm = :move<space> # Move to folder
+      mc = :copy<space> # Copy to folder
+      mr = :read<Enter> # Mark read
+      mu = :unread<Enter> # Mark unread
+      mf = :flag -t -x flagged<Enter> # Toggle flagged
+      mU = :unsubscribe<Enter> # Unsubscribe from list
+      s = :split<Enter>
+      S = :vsplit<Enter>
+      | = :pipe<space>
+      $ = :term<space>
+
+      / = :search<space>
+      \ = :filter<space>
+      n = :next-result<Enter>
+      N = :prev-result<Enter>
+      <Esc> = :clear<Enter>
+      <C-c> = :clear<Enter>
+      Fu = :filter -u<Enter> # Unread
+      Ff = :filter -x flagged<Enter> # Flagged
+      Fs = :filter -f<space> # From sender
+      Ft = :filter -t<space> # To recipient
+      Fd = :filter -d<space> # Date range
+      Fc = :clear<Enter> # Clear filter
+      F/ = :filter<space> # Filter prompt
+
+      [messages:folder=Drafts]
+      <Enter> = :recall<Enter>
+
+      [view]
+      # The viewer forwards every key it does not bind itself to the pager, so
+      # globals like ? and : never arrive: bind them again here.
+      $ex = :
+      ? = :help keys<Enter>
+      / = :toggle-key-passthrough<Enter>/
+      q = :close<Enter>
+      <Esc> = :close<Enter>
+      o = :open<Enter>
+      O = :open<space>
+      S = :save<space>
+      s = :save -fpa ~/Downloads<Enter>
+      | = :pipe<space>
+      d = :choose -o y 'Really delete this message' delete-message<Enter>
+      D = :delete<Enter>
+      a = :archive flat<Enter>
+      f = :forward<Enter>
+      r = :reply -aq<Enter>
+      R = :reply -q<Enter>
+      H = :toggle-headers<Enter>
+      th = :toggle-headers<Enter> # Headers
+      <C-j> = :next-part<Enter>
+      <C-Down> = :next-part<Enter>
+      <C-k> = :prev-part<Enter>
+      <C-Up> = :prev-part<Enter>
+      \]p = :next-part<Enter> # Next part
+      \[p = :prev-part<Enter> # Previous part
+      \]m = :next<Enter> # Next message
+      \[m = :prev<Enter> # Previous message
+      J = :next<Enter>
+      K = :prev<Enter>
+      gx = :menu -lc fzf :open-link<Enter> # Open link (fzf)
+      gy = :copy-link<space>
+
+      [view::passthrough]
+      $noinherit = true
+      $ex = <C-x>
+      <Esc> = :toggle-key-passthrough<Enter>
+
+      [compose]
+      $noinherit = true
+      $ex = <C-x>
+      $complete = <C-o>
+      <tab> = :next-field<Enter>
+      <backtab> = :prev-field<Enter>
+      <C-j> = :next-field<Enter>
+      <C-Down> = :next-field<Enter>
+      <C-k> = :prev-field<Enter>
+      <C-Up> = :prev-field<Enter>
+      <A-j> = :next-field<Enter>
+      <A-k> = :prev-field<Enter>
+      <A-p> = :switch-account -p<Enter>
+      <A-n> = :switch-account -n<Enter>
+      <C-p> = :prev-tab<Enter>
+      <C-n> = :next-tab<Enter>
+
+      [compose::editor]
+      $noinherit = true
+      $ex = <C-x>
+      <C-j> = :next-field<Enter>
+      <C-Down> = :next-field<Enter>
+      <C-k> = :prev-field<Enter>
+      <C-Up> = :prev-field<Enter>
+      <A-j> = :next-field<Enter>
+      <A-k> = :prev-field<Enter>
+      <C-p> = :prev-tab<Enter>
+      <C-n> = :next-tab<Enter>
+
+      [compose::review]
+      # aerc has no "always send HTML" setting, so the send key adds the
+      # text/html alternative first; Y sends the plain text part on its own.
+      y = :multipart text/html<Enter>:send<Enter> # Send (HTML + plain text)
+      Y = :send<Enter> # Send plain text only
+      h = :multipart text/html<Enter> # Add HTML alternative
+      H = :multipart -d text/html<Enter> # Drop HTML alternative
+      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<space> # Add attachment
+      A = :menu -c 'fzf --multi' :attach<Enter> # Add attachment (fzf)
+      d = :detach<space> # Remove attachment
+
+      [terminal]
+      $noinherit = true
+      $ex = <C-x>
+      <C-p> = :prev-tab<Enter>
+      <C-n> = :next-tab<Enter>
+    '';
+
+    # tokyonight-storm, matching Ghostty (modules/home/ghostty.nix). Background
+    # is left at the terminal default so the panes blend with the window.
+    ".config/aerc/stylesets/tokyonight".text = ''
+      *.default=true
+      *.normal=true
+
+      default.fg=#c0caf5
+
+      error.fg=#f7768e
+      warning.fg=#ff9e64
+      success.fg=#9ece6a
+
+      title.fg=#1f2335
+      title.bg=#7aa2f7
+      title.bold=true
+      header.fg=#7aa2f7
+      header.bold=true
+      realname.fg=#c0caf5
+      email.fg=#565f89
+      subject.fg=#c0caf5
+      subject.bold=true
+      date.fg=#565f89
+
+      tab.fg=#545c7e
+      tab.bg=#1f2335
+      tab.selected.fg=#c0caf5
+      tab.selected.bg=#292e42
+      tab.selected.bold=true
+
+      border.fg=#292e42
+      border.bg=#292e42
+
+      spinner.fg=#7dcfff
+
+      msglist_default.fg=#a9b1d6
+      msglist_unread.fg=#c0caf5
+      msglist_unread.bold=true
+      msglist_read.fg=#737aa2
+      msglist_answered.fg=#bb9af7
+      msglist_forwarded.fg=#9d7cd8
+      msglist_flagged.fg=#e0af68
+      msglist_flagged.bold=true
+      msglist_deleted.fg=#565f89
+      msglist_deleted.dim=true
+      msglist_result.fg=#9ece6a
+      msglist_result.bold=true
+      msglist_thread_folded.fg=#7dcfff
+      msglist_thread_context.fg=#565f89
+      msglist_thread_orphan.fg=#ff9e64
+      msglist_marked.fg=#1f2335
+      msglist_marked.bg=#7dcfff
+      msglist_gutter.fg=#292e42
+      msglist_pill.fg=#1f2335
+      msglist_pill.bg=#7aa2f7
+      msglist_*.selected.bg=#292e42
+      msglist_*.selected.bold=true
+
+      dirlist_default.fg=#a9b1d6
+      dirlist_unread.fg=#7aa2f7
+      dirlist_unread.bold=true
+      dirlist_recent.fg=#7dcfff
+      dirlist_*.selected.bg=#292e42
+      dirlist_*.selected.bold=true
+
+      statusline_default.fg=#c0caf5
+      statusline_default.bg=#1f2335
+      statusline_error.fg=#f7768e
+      statusline_error.bold=true
+      statusline_warning.fg=#ff9e64
+      statusline_success.fg=#9ece6a
+      statusline_success.bold=true
+
+      completion_default.fg=#a9b1d6
+      completion_default.selected.bg=#292e42
+      completion_description.fg=#565f89
+      completion_gutter.bg=#1f2335
+      completion_pill.bg=#7aa2f7
+
+      keyhint_default.bg=#1f2335
+      keyhint_key.fg=#7dcfff
+      keyhint_key.bold=true
+      keyhint_desc.fg=#a9b1d6
+
+      part_switcher.bg=#1f2335
+      part_filename.fg=#7dcfff
+      part_mimetype.fg=#565f89
+      part_*.selected.bg=#292e42
+
+      selector_default.fg=#a9b1d6
+      selector_focused.fg=#c0caf5
+      selector_focused.bg=#292e42
+      selector_chooser.bold=true
+
+      [viewer]
+      url.fg=#7dcfff
+      url.underline=true
+      header.fg=#7aa2f7
+      header.bold=true
+      signature.fg=#565f89
+      signature.dim=true
+      diff_meta.fg=#c0caf5
+      diff_meta.bold=true
+      diff_chunk.fg=#7dcfff
+      diff_chunk_func.fg=#7dcfff
+      diff_chunk_func.bold=true
+      diff_add.fg=#9ece6a
+      diff_del.fg=#f7768e
+      diff_whitespace.bg=#f7768e
+      quote_1.fg=#7aa2f7
+      quote_2.fg=#bb9af7
+      quote_3.fg=#7dcfff
+      quote_4.fg=#565f89
+      quote_x.fg=#565f89
+      quote_x.dim=true
+      code.fg=#9ece6a
+    '';
+  };
+}
diff --git a/modules/home/default.nix b/modules/home/default.nix
index baa366e..2c4fbd3 100644
--- a/modules/home/default.nix
+++ b/modules/home/default.nix
@@ -2,6 +2,7 @@
 
 {
   imports = [
+    ./aerc.nix
     ./claude.nix
     ./git.nix
     ./ghostty.nix
@@ -29,6 +30,7 @@
   };
 
   home.packages = with pkgs; [
+    aerc
     claude-code
     dina.packages.${pkgs.stdenv.hostPlatform.system}.default
     delta