From b7bedab28a4ce16b722386852d39f0ad7d524d41 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Sat, 14 Sep 2019 21:20:13 +0200
Subject: [PATCH] Shell: Support extremely naive shell script execution

This patch allows passing a script as an argument to the Shell program.
We will read the specified line by line and pass them through the Shell
command interpreter.

This is not very powerful, but it's a start :^)
---
 Shell/main.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Shell/main.cpp b/Shell/main.cpp
index 57acffdd6e..19bdf37284 100644
--- a/Shell/main.cpp
+++ b/Shell/main.cpp
@@ -360,6 +360,9 @@ static int run_command(const String& cmd)
     if (cmd.is_empty())
         return 0;
 
+    if (cmd.starts_with("#"))
+        return 0;
+
     auto commands = Parser(cmd).parse();
 
 #ifdef SH_DEBUG
@@ -642,6 +645,21 @@ int main(int argc, char** argv)
         return 0;
     }
 
+    if (argc == 2 && argv[1][0] != '-') {
+        CFile file(argv[1]);
+        if (!file.open(CIODevice::ReadOnly)) {
+            fprintf(stderr, "Failed to open %s: %s\n", file.filename().characters(), file.error_string());
+            return 1;
+        }
+        for (;;) {
+            auto line = file.read_line(4096);
+            if (line.is_null())
+                break;
+            run_command(String::copy(line, Chomp));
+        }
+        return 0;
+    }
+
     {
         auto* cwd = getcwd(nullptr, 0);
         g.cwd = cwd;