feat: add CLI asset generation for shell completions and man page

tools/meson/install-cli-assets.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ "$#" -ne 5 ]; then
+  echo "usage: $0 <depot-bin> <bash-dir> <zsh-dir> <fish-dir> <man1-dir>" >&2
+  exit 2
+fi
+
+depot_bin="$1"
+bash_dir="$2"
+zsh_dir="$3"
+fish_dir="$4"
+man1_dir="$5"
+
+if [ ! -x "$depot_bin" ]; then
+  echo "error: depot binary is not executable: $depot_bin" >&2
+  exit 1
+fi
+
+if [ -z "${MESON_INSTALL_DESTDIR_PREFIX:-}" ]; then
+  echo "error: MESON_INSTALL_DESTDIR_PREFIX is not set" >&2
+  exit 1
+fi
+
+resolve_dest() {
+  case "$1" in
+    /*) printf '%s%s\n' "${DESTDIR:-}" "$1" ;;
+    *) printf '%s/%s\n' "$MESON_INSTALL_DESTDIR_PREFIX" "$1" ;;
+  esac
+}
+
+tmpdir="$(mktemp -d)"
+trap 'rm -rf "$tmpdir"' EXIT
+
+"$depot_bin" generate-artifacts --out-dir "$tmpdir"
+
+bash_dest="$(resolve_dest "$bash_dir")"
+zsh_dest="$(resolve_dest "$zsh_dir")"
+fish_dest="$(resolve_dest "$fish_dir")"
+man_dest="$(resolve_dest "$man1_dir")"
+
+mkdir -p "$bash_dest" "$zsh_dest" "$fish_dest" "$man_dest"
+cp "$tmpdir/depot.bash" "$bash_dest/depot"
+cp "$tmpdir/_depot" "$zsh_dest/_depot"
+cp "$tmpdir/depot.fish" "$fish_dest/depot.fish"
+cp "$tmpdir/depot.1" "$man_dest/depot.1"