general: Started working on completion.

completions/neofetch-completion.bash

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+#
+# Shell completion for neofetch.
+
+_neofetch_completions() {
+    local flags cur prev
+
+    # User input.
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    prev="${COMP_WORDS[COMP_CWORD-1]}"
+
+    # Generate a list of flags.
+    IFS=$'\n' read -d "" -ra flags \
+        < <(neofetch --help | awk '/^    --/{print $1}')
+
+    # Complete partial matches.
+    IFS=$'\n' read -d "" -ra COMPREPLY \
+        < <(compgen -W "${flags[*]}" -- "$cur")
+
+
+    case "$prev" in
+        "--disable")
+            conf="${HOME}/.config/neofetch/config.conf"
+
+            [[ -f "$conf" ]] &&
+                IFS=$'\n' read -d "" -ra COMPREPLY \
+                    < <(awk '/  info /&&!a[$0]++{print $NF}' "$conf")
+        ;;
+
+        "--backend")
+            IFS=$'\n' read -d "" -ra COMPREPLY \
+                < <(neofetch --help | awk -F\' '/ Shortcut/ {print $2}')
+        ;;
+    esac
+}
+
+complete -F _neofetch_completions neofetch