Add the agents usage bar widget

install/steps/shell.sh

@@ -0,0 +1,86 @@
+bar_widgets=(
+  "blob.agents:blob.tray"
+)
+
+make_scripts_executable() {
+  local not_executable=()
+  local script
+
+  while IFS= read -r script; do
+    not_executable+=("$script")
+  done < <(find "$repo_dir/bin" -maxdepth 1 -type f ! -perm -u+x | sort)
+
+  if (( ${#not_executable[@]} == 0 )); then
+    say "ok    bin/ scripts executable"
+    return 0
+  fi
+
+  note_change
+  if [[ $check == true ]]; then
+    say "would make ${#not_executable[@]} script(s) in bin/ executable"
+    return 0
+  fi
+
+  chmod +x "${not_executable[@]}"
+  say "chmod ${#not_executable[@]} script(s) in bin/"
+}
+
+bar_has_widget() {
+  local shell_config="$1" widget_id="$2"
+  jq -e --arg id "$widget_id" '[.bar.layout[][]? | .id?] | index($id) != null' "$shell_config" >/dev/null 2>&1
+}
+
+add_bar_widget() {
+  local shell_config="$1" widget_id="$2" after_id="$3"
+  local updated_config
+
+  updated_config="$(mktemp)"
+  jq --arg id "$widget_id" --arg after "$after_id" '
+    if ([.bar.layout[][]? | .id?] | index($after)) != null then
+      .bar.layout |= map_values([.[] | if .id? == $after then ., {id: $id} else . end])
+    else
+      .bar.layout.right = [{id: $id}] + (.bar.layout.right // [])
+    end
+  ' "$shell_config" >"$updated_config" || {
+    rm -f "$updated_config"
+    warn "could not add $widget_id to shell.json"
+    return 0
+  }
+
+  cp "$shell_config" "$shell_config.bak"
+  mv "$updated_config" "$shell_config"
+  say "add   bar widget $widget_id"
+}
+
+install_bar_widgets() {
+  local shell_config="$config_dir/blob/shell.json"
+  local entry widget_id after_id
+
+  if [[ ! -f $shell_config ]]; then
+    say "SKIP  bar widgets (no shell.json yet)"
+    return 0
+  fi
+
+  if ! command -v jq &>/dev/null; then
+    say "SKIP  bar widgets (jq not installed)"
+    return 0
+  fi
+
+  for entry in "${bar_widgets[@]}"; do
+    widget_id="${entry%%:*}"
+    after_id="${entry#*:}"
+
+    if bar_has_widget "$shell_config" "$widget_id"; then
+      say "ok    bar widget $widget_id"
+      continue
+    fi
+
+    note_change
+    if [[ $check == true ]]; then
+      say "would add bar widget $widget_id after $after_id"
+      continue
+    fi
+
+    add_bar_widget "$shell_config" "$widget_id" "$after_id"
+  done
+}