Add sogrep

This is from Eli's dotfiles after he'd cleaned it up but never actually went ahead and made this PR.
I figure it's time to add it.

Makefile

@@ -16,7 +16,8 @@ BINPROGS = \
 	crossrepomove\
 	arch-nspawn \
 	mkarchroot \
-	makechrootpkg
+	makechrootpkg \
+	sogrep
 
 CONFIGFILES = \
 	makepkg-x86_64.conf \
@@ -63,7 +64,8 @@ BASHCOMPLETION_LINKS = \
 
 MANS = \
 	doc/lddd.1 \
-	doc/checkpkg.1
+	doc/checkpkg.1 \
+	doc/sogrep.1
 
 
 all: $(BINPROGS) bash_completion zsh_completion man

doc/footer.asciidoc

@@ -20,7 +20,7 @@ Maintainers:
 * Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
 * Levente Polyak <anthraxx@archlinux.org>
 * Pierre Schmitz <pierre@archlinux.de>
-* Sébastien Luttringer <seblu@seblu.net> 
+* Sébastien Luttringer <seblu@seblu.net>
 * Sven-Hendrik Haase <svenstaro@gmail.com>
 * Thomas Bächler <thomas@archlinux.org>
 

doc/sogrep.1.asciidoc

@@ -0,0 +1,31 @@
+sogrep(1)
+=========
+
+Name
+----
+sogrep - Find packages using a linked to a given shared library
+
+Synopsis
+--------
+sogrep [options] repo libname
+
+Description
+-----------
+
+Check the soname links database for pacman repositories containing packages
+linked to a given shared library. If the repository specified is "all", then
+all repositories will be searched, otherwise only the named repository will be
+searched.
+
+If the links database does not exist, it will be downloaded first.
+
+Options
+-------
+
+*-r, --refresh*::
+	Refresh the links databases
+
+*-h, --help*::
+	Show a help text
+
+include::footer.asciidoc[]

sogrep

@@ -0,0 +1,98 @@
+#!/bin/bash
+# License: Unspecified
+
+: ${SOLINKS_MIRROR:="https://mirror.pkgbuild.com"}
+: ${SOCACHE_DIR:="${XDG_CACHE_HOME:-${HOME}/.cache}/sogrep"}
+repos=('staging' 'testing' 'core' 'extra'
+       'community-staging' 'community-testing' 'community'
+       'multilib-staging' 'multilib-testing' 'multilib'
+       'gnome-unstable' 'kde-unstable')
+arches=('x86_64')
+
+source /usr/share/makepkg/util/util.sh
+
+recache() {
+    local repo arch
+
+    for repo in "${repos[@]}"; do
+        for arch in "${arches[@]}"; do
+            rm -rf "${SOCACHE_DIR}/${arch}/${repo}"
+            mkdir -p "${SOCACHE_DIR}/${arch}/${repo}"
+            curl "${SOLINKS_MIRROR}/${repo}/os/${arch}/${repo}.links.tar.gz" | bsdtar -xf - -C "${SOCACHE_DIR}/${arch}/${repo}"
+        done
+    done
+}
+
+search() {
+    local repo=$1 arch lib=$2
+
+    if [[ $repo != all ]]; then
+        if ! in_array "$repo" "${repos[@]}"; then
+            echo "${BASH_SOURCE[0]##*/}: unrecognized repo '$repo'"
+            echo "Try '${BASH_SOURCE[0]##*/} --help' for more information."
+            exit 1
+        fi
+        local repos=("${repo}")
+    fi
+
+    if [[ ! -d ${SOCACHE_DIR} ]]; then
+        recache
+    fi
+
+    for arch in "${arches[@]}"; do
+        for repo in "${repos[@]}"; do
+            db=${SOCACHE_DIR}/${arch}/${repo}/
+            if [[ -d ${db} ]]; then
+                while read -rd '' pkg; do
+                    pkg=${pkg#${db}}
+                    printf '%s/%s\n' "${repo}" "${pkg%-*-*/links}"
+                done < <(grep -rlZ "${lib}" "${db}")
+            fi
+        done
+     done | sort -u
+}
+
+usage() {
+    cat <<- _EOF_
+		Usage: ${BASH_SOURCE[0]##*/} [OPTIONS] REPO LIBNAME
+
+		Check the soname links database for pacman repositories containing
+		packages linked to a given shared library. If the repository specified
+		is "all", then all repositories will be searched, otherwise only the
+		named repository will be searched.
+
+		If the links database does not exist, it will be downloaded first.
+
+		OPTIONS
+		    -r, --refresh   Refresh the links databases
+		    -h, --help      Show this help text
+_EOF_
+}
+
+if (( $# == 0 )); then
+    echo "error: No arguments passed."
+    echo "Try '${BASH_SOURCE[0]##*/} --help' for more information."
+    exit 1
+fi
+
+while (( $# )); do
+    case $1 in
+        -r|--refresh)
+            recache
+            ;;
+        -h|--help)
+            usage
+            exit 0
+            ;;
+        *)
+            if (( $# < 2 )); then
+                echo "error: Not enough arguments passed."
+                echo "Try '${BASH_SOURCE[0]##*/} --help' for more information."
+                exit 1
+            fi
+            search "$@"
+            exit $?
+            ;;
+    esac
+    shift
+done