Function applyVarToScope

src/utils/bash/ast.ts:2017–2027

* Apply a variable assignment to the scope, handling `+=` append semantics. * SECURITY: If EITHER side (existing value or appended value) contains a * placeholder, the result is non-literal — store VAR_PLACEHOLDER so later * $VAR correctly rejects as bare arg. * `VAR=/etc && VAR+=$(cmd)` must no

(
  varScope: Map<string, string>,
  ev: { name: string; value: string; isAppend: boolean },
)

 * `VAR=/etc && VAR+=$(cmd)` must not leave VAR looking static.
 */
function applyVarToScope(
  varScope: Map<string, string>,
  ev: { name: string; value: string; isAppend: boolean },
): void {
  const existing = varScope.get(ev.name) ?? ''
  const combined = ev.isAppend ? existing + ev.value : ev.value
  varScope.set(
    ev.name,
    containsAnyPlaceholder(combined) ? VAR_PLACEHOLDER : combined,
  )
}

function stripRawString(text: string): string {
  return text.slice(1, -1)