From 6a68b1fd2161357a5905b875e9d59609a2b829b1 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Wed, 8 Dec 2021 22:46:50 +0300
Subject: Add support for package dependency and requirement alternatives
 representation new syntax

---
 tests/buildfile-scanner/driver.cxx | 106 +++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 tests/buildfile-scanner/driver.cxx

(limited to 'tests/buildfile-scanner/driver.cxx')

diff --git a/tests/buildfile-scanner/driver.cxx b/tests/buildfile-scanner/driver.cxx
new file mode 100644
index 0000000..fec15bd
--- /dev/null
+++ b/tests/buildfile-scanner/driver.cxx
@@ -0,0 +1,106 @@
+// file      : tests/buildfile-scanner/driver.cxx -*- C++ -*-
+// license   : MIT; see accompanying LICENSE file
+
+#include <ios>      // ios_base::failbit, ios_base::badbit
+#include <string>
+#include <iostream>
+
+#include <libbutl/utf8.hxx>
+#include <libbutl/utility.hxx>      // operator<<(ostream,exception)
+#include <libbutl/char-scanner.hxx>
+
+#include <libbpkg/buildfile-scanner.hxx>
+
+#undef NDEBUG
+#include <cassert>
+
+using namespace std;
+using namespace butl;
+using namespace bpkg;
+
+// Usages:
+//
+// argv[0] (-e|-l [<char>]|-b)
+//
+// Read and scan the buildfile from stdin and print the scan result to stdout.
+//
+// -e          scan evaluation context
+// -l [<char>] scan single line, optionally terminated with the stop character
+// -b          scan buildfile block
+//
+int
+main (int argc, char* argv[])
+{
+  assert (argc >= 2);
+
+  string mode (argv[1]);
+
+  cin.exceptions  (ios_base::failbit | ios_base::badbit);
+  cout.exceptions (ios_base::failbit | ios_base::badbit);
+
+  using scanner = char_scanner<utf8_validator>;
+
+  scanner s (cin);
+
+  string bsn ("stdin");
+  buildfile_scanner<utf8_validator, 1> bs (s, bsn);
+
+  try
+  {
+    string r;
+
+    if (mode == "-e")
+    {
+      scanner::xchar c (s.get ());
+      assert (c == '(');
+
+      r += c;
+      r += bs.scan_eval ();
+
+      c = s.get ();
+      assert (c == ')');
+
+      r += c;
+    }
+    else if (mode == "-l")
+    {
+      char stop ('\0');
+
+      if (argc == 3)
+      {
+        const char* chr (argv[2]);
+        assert (chr[0] != '\0' && chr[1] == '\0');
+
+        stop = chr[0];
+      }
+
+      r += bs.scan_line (stop);
+
+      scanner::xchar c (s.get ());
+      assert (scanner::eos (c) || c == '\n' || (stop != '\0' && c == stop));
+    }
+    else if (mode == "-b")
+    {
+      scanner::xchar c (s.get ());
+      assert (c == '{');
+
+      r += c;
+      r += bs.scan_block ();
+
+      assert (scanner::eos (s.peek ()));
+
+      r += "}\n";
+    }
+    else
+      assert (false);
+
+    cout << r;
+  }
+  catch (const buildfile_scanning& e)
+  {
+    cerr << e << endl;
+    return 1;
+  }
+
+  return 0;
+}
-- 
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