fix(packages/core): core command line parser does not handle octal escape

Also a few more fixes for handling of pipe stages that span lines

Author: starpit

packages/core/src/repl/pipe-stages.ts

@@ -41,7 +41,9 @@ export function splitIntoPipeStages(command: string): CommandLine['pipeStages']
         .replace(/^\s*>/, '')
         .trim()
 
-  const stages = split(command, false, undefined, '|', pipeStartIdx, pipeEndIdx).map(_ => split(_, false))
+  const stages = split(command, false, undefined, '|', pipeStartIdx, pipeEndIdx).map(_ =>
+    split(_, false).map(_ => _.replace(/\\\s/g, ''))
+  )
 
   return { prefix, stages, redirect }
 }

packages/core/src/repl/split.ts

@@ -78,10 +78,11 @@ export const _split = (
   const removedLastOpenQuote: boolean[] = []
   let escapeActive = false
   for (let idx = startIdx; idx < endIdx; idx++) {
-    let char = str.charAt(idx)
+    const char = str.charAt(idx)
 
-    if (splitBy === ' ' && char === splitBy) {
+    if (char === splitBy) {
       if (
+        splitBy === ' ' &&
         process.platform === 'win32' &&
         idx < str.length - 3 &&
         /\w/.test(str.charAt(idx + 1)) &&
@@ -90,13 +91,16 @@ export const _split = (
       ) {
         isWindowsDrivePath = true
       }
-    } else if (!isWindowsDrivePath && char === '\\') {
+    } else if (!isWindowsDrivePath && char === '\\' && (idx === endIdx - 1 || str.charAt(idx + 1) !== '0')) {
+      // careful about \0 for octal escape
+
       if (!escapeActive) {
         escapeActive = true
-        char = str.charAt(++idx)
-        if (!removeOuterQuotes) {
-          cur += '\\'
-        }
+        continue
+        // char = str.charAt(++idx)
+        // if (!removeOuterQuotes) {
+        // cur += '\\'
+        // }
       } else {
         escapeActive = false
         cur += '\\'