is_required

List which Slackware SBo packages depend on a given package, and whether each is installed.

Given a package name, is_required searches the SlackBuilds.org (SBo) git tree for .info files whose REQUIRES= field names that package (whole-word match), then marks each dependent as installed or missing by checking /var/log/packages.

Usage

is_required [OPTIONS] <package>

Options

Flag	Effect
`-i`	show only installed dependents
`-u`	show only uninstalled dependents
`-r`	recursive: also show packages that require those dependents (one level up)
`-h`	help

Example

$ is_required ffmpeg
Packages requiring 'ffmpeg':
────────────────────────────────────────────────────
[I] mpv                                       (multimedia)
[ ] obs-studio                                (multimedia)

Output legend

[I] — installed (present in /var/log/packages), bold green
[ ] — not installed, yellow
<package> — queried package name in the header, bold cyan
(category) — SBo category of the dependent, dim white

Color is auto-disabled when stdout is not a terminal (piped or redirected).

Configuration

Both paths are overridable via environment variables:

Variable	Default	Meaning
`SBO_REPO`	`/var/lib/sbopkg/SBo-git`	SBo git tree to search
`PKG_LOG`	`/var/log/packages`	installed-package log

Package names are derived from /var/log/packages filenames by stripping the trailing version, arch, and build-tag fields (e.g. ffmpeg-7.1.4-x86_64-1 → ffmpeg).

Note: /var/log/packages is a symlink to /var/lib/pkgtools/packages, so find is run with -follow.

Bash completion

is_required.bash completes option flags and installed package names (read from $PKG_LOG).

Install system-wide:

sudo cp is_required.bash /etc/bash_completion.d/is_required

Or per-user (requires ~/.bash_completion.d/ sourced in ~/.bashrc):

cp is_required.bash ~/.bash_completion.d/is_required

Requirements

Bash 4+ (uses associative arrays)
Standard SlackBuilds tooling layout (sbopkg SBo-git tree, pkgtools package log)