refactor(opencode): fetch remote config with http client (#28661)

packages/opencode/src/config/variable.ts

@@ -19,6 +19,7 @@ type ParseSource =
 type SubstituteInput = ParseSource & {
   text: string
   missing?: "error" | "empty"
+  env?: Record<string, string>
 }
 
 function source(input: ParseSource) {
@@ -33,7 +34,7 @@ function dir(input: ParseSource) {
 export async function substitute(input: SubstituteInput) {
   const missing = input.missing ?? "error"
   let text = input.text.replace(/\{env:([^}]+)\}/g, (_, varName) => {
-    return process.env[varName] || ""
+    return (input.env?.[varName] ?? process.env[varName]) || ""
   })
 
   const fileMatches = Array.from(text.matchAll(/\{file:[^}]+\}/g))
@@ -46,7 +47,7 @@ export async function substitute(input: SubstituteInput) {
 
   for (const match of fileMatches) {
     const token = match[0]
-    const index = match.index!
+    const index = match.index
     out += text.slice(cursor, index)
 
     const lineStart = text.lastIndexOf("\n", index - 1) + 1