From 1c6758009e82c47b5b341d418be2be401ef31482 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Fri, 6 Sep 2019 22:20:46 +0300
Subject: Add builtins support

---
 tests/builtin/driver.cxx | 159 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 tests/builtin/driver.cxx

(limited to 'tests/builtin/driver.cxx')

diff --git a/tests/builtin/driver.cxx b/tests/builtin/driver.cxx
new file mode 100644
index 0000000..bf171cb
--- /dev/null
+++ b/tests/builtin/driver.cxx
@@ -0,0 +1,159 @@
+// file      : tests/builtin/driver.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <cassert>
+
+#ifndef __cpp_lib_modules_ts
+#include <string>
+#include <vector>
+#include <utility>  // move()
+#include <ostream>
+#include <iostream>
+#endif
+
+// Other includes.
+
+#ifdef __cpp_modules_ts
+#ifdef __cpp_lib_modules_ts
+import std.core;
+import std.io;
+#endif
+import butl.path;
+import butl.utility;   // eof()
+import butl.builtin;
+import butl.optional;
+import butl.timestamp; // to_stream(duration)
+#else
+#include <libbutl/path.mxx>
+#include <libbutl/utility.mxx>
+#include <libbutl/builtin.mxx>
+#include <libbutl/optional.mxx>
+#include <libbutl/timestamp.mxx>
+#endif
+
+using namespace std;
+using namespace butl;
+
+inline ostream&
+operator<< (ostream& os, const path& p)
+{
+  return os << p.representation ();
+}
+
+// Usage: argv[0] [-d <dir>] [-o <opt>] [-c] [-i] <builtin> <builtin-args>
+//
+// Execute the builtin and exit with its exit status.
+//
+// -d <dir>  use as a current working directory
+// -c        use callbacks that, in particular, trace calls to stdout
+// -o <opt>  additional builtin option recognized by the callback
+// -i        read lines from stdin and append them to the builtin arguments
+//
+int
+main (int argc, char* argv[])
+{
+  using butl::optional;
+
+  cin.exceptions  (ios::badbit);
+  cout.exceptions (ios::failbit | ios::badbit);
+  cerr.exceptions (ios::failbit | ios::badbit);
+
+  bool in (false);
+  dir_path cwd;
+  string option;
+  builtin_callbacks callbacks;
+
+  string name;
+  vector<string> args;
+
+  auto flag = [] (bool v) {return v ? "true" : "false";};
+
+  // Parse the driver options and arguments.
+  //
+  int i (1);
+  for (; i != argc; ++i)
+  {
+    string a (argv[i]);
+
+    if (a == "-d")
+    {
+      ++i;
+
+      assert (i != argc);
+      cwd = dir_path (argv[i]);
+    }
+    else if (a == "-o")
+    {
+      ++i;
+
+      assert (i != argc);
+      option = argv[i];
+    }
+    else if (a == "-c")
+    {
+      callbacks = builtin_callbacks (
+        [&flag] (const path& p, bool pre)
+        {
+          cout << "create " << p << ' ' << flag (pre) << endl;
+        },
+        [&flag] (const path& from, const path& to, bool force, bool pre)
+        {
+          cout << "move " << from << ' ' << to << ' ' << flag (force) << ' '
+                          << flag (pre) << endl;
+        },
+        [&flag] (const path& p, bool force, bool pre)
+        {
+          cout << "remove " << p << ' ' << flag (force) << ' ' << flag (pre)
+                            << endl;
+        },
+        [&option] (const vector<string>& args, size_t i)
+        {
+          cout << "option " << args[i] << endl;
+          return !option.empty () && args[i] == option ? 1 : 0;
+        },
+        [] (const duration& d)
+        {
+          cout << "sleep ";
+          to_stream (cout, d, false /* nanoseconds */);
+          cout << endl;
+        }
+      );
+    }
+    else if (a == "-i")
+      in = true;
+    else
+      break;
+  }
+
+  // Parse the builtin name and arguments.
+  //
+  assert (i != argc);
+  name = argv[i++];
+
+  for (; i != argc; ++i)
+    args.push_back (argv[i]);
+
+  // Read out additional arguments from stdin.
+  //
+  if (in)
+  {
+    string s;
+    while (!eof (getline (cin, s)))
+      args.push_back (move (s));
+  }
+
+  // Execute the builtin.
+  //
+  builtin_function* bf (builtins.find (name));
+
+  if (bf == nullptr)
+  {
+    cerr << "unknown builtin '" << name << "'" << endl;
+    return 1;
+  }
+
+  uint8_t r; // Storage.
+  builtin b (bf (r, args, nullfd, nullfd, nullfd, cwd, callbacks));
+  return b.wait ();
+}
-- 
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