refactor: move onLine to test helpers

src/node/util.ts

@@ -17,39 +17,7 @@ export interface Paths {
   runtime: string
 }
 
-// From https://github.com/chalk/ansi-regex
-const pattern = [
-  "[\\u001B\\u009B][[\\]()#;?]*(?:(?:(?:(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]+)*|[a-zA-Z\\d]+(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]*)*)?\\u0007)",
-  "(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PR-TZcf-ntqry=><~]))",
-].join("|")
-const re = new RegExp(pattern, "g")
-
 export type OnLineCallback = (strippedLine: string, originalLine: string) => void
-/**
- * Split stdout on newlines and strip ANSI codes.
- */
-export const onLine = (proc: cp.ChildProcess, callback: OnLineCallback): void => {
-  let buffer = ""
-  if (!proc.stdout) {
-    throw new Error("no stdout")
-  }
-  proc.stdout.setEncoding("utf8")
-  proc.stdout.on("data", (d) => {
-    const data = buffer + d
-    const split = data.split("\n")
-    const last = split.length - 1
-
-    for (let i = 0; i < last; ++i) {
-      callback(split[i].replace(re, ""), split[i])
-    }
-
-    // The last item will either be an empty string (the data ended with a
-    // newline) or a partial line (did not end with a newline) and we must
-    // wait to parse it until we get a full line.
-    buffer = split[last]
-  })
-}
-
 export const paths = getEnvPaths()
 
 /**