updates

kernel/bin/sort

@@ -0,0 +1,30 @@
+/** Shared helpers for drive-resident /bin scripts (prepended before each command). */
+function bareStdin(ctx) {
+  return typeof ctx.shellStdin === 'string' ? ctx.shellStdin : ''
+}
+
+async function run(ctx, argv) {
+  const vfs = ctx.vfs
+  const files = argv.slice(1).filter((a) => !a.startsWith('-'))
+  /** @type {string[]} */
+  let lines = []
+  if (!files.length) {
+    const s = bareStdin(ctx)
+    lines = s.length ? s.split('\n') : []
+    if (lines.length && lines[lines.length - 1] === '') lines.pop()
+  } else {
+    for (const f of files) {
+      const buf = await vfs.readFile(f)
+      if (!buf) {
+        ctx.console.error('sort: ' + f + ': No such file')
+        ctx.exitCode = 1
+        continue
+      }
+      const part = ctx.b4a.toString(buf).split('\n')
+      if (part.length && part[part.length - 1] === '') part.pop()
+      lines.push(...part)
+    }
+  }
+  lines.sort((x, y) => (x < y ? -1 : x > y ? 1 : 0))
+  if (lines.length) ctx.console.log(lines.join('\n'))
+}