feat: bash completion for the launch selectors

Completes the options, and the account keys after --account, read from the
[account.<key>] sections of the config the application itself reads. Thread
and message ids are deliberately not completed: offering them means querying
the whole notmuch index on every Tab, which on a real Maildir is tens of
thousands of ids nobody would pick from a list anyway.

Installed under share/bash-completion/completions, where bash-completion
loads a command's file on demand by name.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/assets/qtmaildir.bash-completion b/assets/qtmaildir.bash-completion
new file mode 100644
index 0000000..a203be8
--- /dev/null
+++ b/assets/qtmaildir.bash-completion
@@ -0,0 +1,26 @@
+# bash completion for qtmaildir
+#
+# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+# Licensed under the GNU General Public License version 2.
+#
+# Completes the options, and account keys after --account, read from the
+# [account.<key>] sections of the config. Thread and message ids are NOT
+# completed: listing them means querying the whole notmuch index on every Tab.
+
+_qtmaildir()
+{
+    local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
+    local conf=${XDG_CONFIG_HOME:-$HOME/.config}/qtmaildir/qtmaildir.conf
+
+    case $prev in
+        --account)
+            [[ -r $conf ]] || return
+            COMPREPLY=($(compgen -W "$(sed -n 's/^\[account\.\(.*\)\][[:space:]]*$/\1/p' "$conf")" -- "$cur"))
+            return ;;
+        --thread|--message)
+            return ;;
+    esac
+
+    COMPREPLY=($(compgen -W '--account --thread --message --help --version' -- "$cur"))
+}
+complete -F _qtmaildir qtmaildir