gearlever-bin, bottles-bin: bundle AUR-only dependencies

gearlever-bin: ship ftputil + desktop-entry-lib inside /usr/share/gearlever
(pinned via upstream requirements.txt) instead of depending on the AUR
packages.

bottles-bin: build the fvs2 CLI (with its core library) from source and
bundle it under /usr/lib/bottles (Bottles patched to use that path), and
ship patool, pathvalidate and vkbasalt-cli in /usr/share/bottles. vkbasalt
becomes an optdepend. Installing either package now needs no AUR builds.

bottles-bin/pkg.sh

@@ -9,12 +9,18 @@
 
 UPSTREAM_REPO="bottlesdevs/Bottles"
 
+# fvs-lab/fvs2 (+ its core library) is AUR-only, so the binary is built here
+# and bundled under /usr/lib/bottles. Versions pinned to the combination the
+# AUR fvs2 package ships; bump on new fvs2 releases.
+FVS2_VERSION=0.8.1
+FVS2_CORE_VERSION=0.1.1
+
 # Installed in CI (pacman) before build_artifact runs. blueprint-compiler
 # resolves Gtk/Adw/GtkSource imports via their typelibs, hence the GUI libs.
 BUILD_DEPS=(meson ninja blueprint-compiler gobject-introspection
             desktop-file-utils appstream-glib gettext glib2-devel
             python python-gobject gtk4 libadwaita gtksourceview5
-            libportal-gtk4)
+            libportal-gtk4 go python-pip)
 
 latest_version() {
   gh api "repos/$UPSTREAM_REPO/releases/latest" --jq '.tag_name' | sed 's/^v//'
@@ -33,9 +39,35 @@ build_artifact() {
 
   patch -d "$srctree" -p1 < "$pkgdir/remove-flatpak-checks.patch"
 
+  # the bundled fvs2 lives outside $PATH; point Bottles at it
+  grep -q 'return "fvs2"' "$srctree/bottles/fvs/repo.py" \
+    || { echo "fvs2 path hook not found in bottles/fvs/repo.py" >&2; return 1; }
+  sed -i 's|return "fvs2"|return "/usr/lib/bottles/fvs2"|' "$srctree/bottles/fvs/repo.py"
+
   meson setup "$workdir/build" "$srctree" --prefix=/usr --buildtype=release
   meson install -C "$workdir/build" --destdir "$destdir"
 
+  # Build the fvs2 CLI (Go) and bundle it. Its "core" library is a sibling
+  # repository that go.mod expects next to the source tree.
+  mkdir -p "$workdir/fvs" "$destdir/usr/lib/bottles"
+  curl -sfL "https://github.com/fvs-lab/fvs2/archive/refs/tags/v$FVS2_VERSION.tar.gz" | tar -xz -C "$workdir/fvs"
+  curl -sfL "https://github.com/fvs-lab/core/archive/refs/tags/v$FVS2_CORE_VERSION.tar.gz" | tar -xz -C "$workdir/fvs"
+  ln -s "core-$FVS2_CORE_VERSION" "$workdir/fvs/core"
+  (cd "$workdir/fvs/fvs2-$FVS2_VERSION" && \
+    GOPATH="$workdir/gopath" \
+    GOFLAGS="-buildmode=pie -trimpath -mod=readonly -modcacherw" \
+    go build -o "$destdir/usr/lib/bottles/fvs2" ./cmd/fvs2)
+
+  # patool, pathvalidate and vkbasalt-cli are AUR-only pure-python libs;
+  # bundle them into the app's module dir, which the launcher puts on
+  # sys.path. patool/pathvalidate pinned via upstream's requirements.txt.
+  grep -E '^(patool|pathvalidate)==' "$srctree/requirements.txt" > "$workdir/bundle-reqs.txt"
+  [[ "$(wc -l < "$workdir/bundle-reqs.txt")" -eq 2 ]] || { echo "expected patool+pathvalidate pins in requirements.txt" >&2; return 1; }
+  echo 'vkbasalt-cli' >> "$workdir/bundle-reqs.txt"
+  python -m pip install --isolated --no-deps --target "$destdir/usr/share/bottles" \
+    -r "$workdir/bundle-reqs.txt"
+  rm -rf "$destdir/usr/share/bottles/bin"
+
   # These caches are generated by pacman hooks; shipping them would cause
   # file conflicts on install.
   rm -f "$destdir/usr/share/glib-2.0/schemas/gschemas.compiled" \