chore: import upstream snapshot with attribution

2026-07-13 11:55:55 +08:00
commit d48cda4081
3322 changed files with 668744 additions and 0 deletions
@@ -0,0 +1,86 @@
+'use strict';
+
+/**
+ * Split a shell command into segments by operators (&&, ||, ;, &)
+ * while respecting quoting (single/double) and escaped characters.
+ * Redirection operators (&>, >&, 2>&1) are NOT treated as separators.
+ */
+function splitShellSegments(command) {
+  const segments = [];
+  let current = '';
+  let quote = null;
+
+  for (let i = 0; i < command.length; i++) {
+    const ch = command[i];
+
+    // Inside quotes: handle escapes and closing quote
+    if (quote) {
+      if (ch === '\\' && i + 1 < command.length) {
+        current += ch + command[i + 1];
+        i++;
+        continue;
+      }
+      if (ch === quote) quote = null;
+      current += ch;
+      continue;
+    }
+
+    // Backslash escape outside quotes
+    if (ch === '\\' && i + 1 < command.length) {
+      current += ch + command[i + 1];
+      i++;
+      continue;
+    }
+
+    // Opening quote
+    if (ch === '"' || ch === "'") {
+      quote = ch;
+      current += ch;
+      continue;
+    }
+
+    const next = command[i + 1] || '';
+    const prev = i > 0 ? command[i - 1] : '';
+
+    // && operator
+    if (ch === '&' && next === '&') {
+      if (current.trim()) segments.push(current.trim());
+      current = '';
+      i++;
+      continue;
+    }
+
+    // || operator
+    if (ch === '|' && next === '|') {
+      if (current.trim()) segments.push(current.trim());
+      current = '';
+      i++;
+      continue;
+    }
+
+    // ; separator
+    if (ch === ';') {
+      if (current.trim()) segments.push(current.trim());
+      current = '';
+      continue;
+    }
+
+    // Single & — but skip redirection patterns (&>, >&, digit>&)
+    if (ch === '&' && next !== '&') {
+      if (next === '>' || prev === '>') {
+        current += ch;
+        continue;
+      }
+      if (current.trim()) segments.push(current.trim());
+      current = '';
+      continue;
+    }
+
+    current += ch;
+  }
+
+  if (current.trim()) segments.push(current.trim());
+  return segments;
+}
+
+module.exports = { splitShellSegments };