Initial commit: is_installed script with GPLv2 license

Slackware package query tool plus bash completion. Add GPLv2 LICENSE,
per-file headers, README, and CLAUDE.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/is_installed.bash-completion b/is_installed.bash-completion
new file mode 100644
index 0000000..4c3eaa0
--- /dev/null
+++ b/is_installed.bash-completion
@@ -0,0 +1,48 @@
+# bash completion for is_installed
+# -*- shell-script -*-
+#
+# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+
+_is_installed()
+{
+    local cur prev words cword
+    _init_completion -n = || return
+
+    local split=false
+
+    local i action
+    for (( i=1; i<${#words[@]}; i++ )); do
+        if [[ "${words[i]}" != -* ]]; then
+            action="${words[i]}"
+            break
+        fi
+    done
+
+    case "$action" in
+        help)
+            # no argument required
+            return
+            ;;
+        info)
+			COMPREPLY=( $(cd /var/log/packages; compgen -f -- "$cur") )
+            return
+            ;;
+        file-search)
+            # argument required but no way to help
+            return
+            ;;
+        *)
+            COMPREPLY+=( $(compgen -W 'help info file-search' -- "$cur") )
+            return
+            ;;
+    esac
+
+}
+
+complete -F _is_installed is_installed
+
+# ex: filetype=sh