Split build system into library and driver

1 files changed, 138 insertions, 0 deletions

diff --git a/libbuild2/diagnostics.cxx b/libbuild2/diagnostics.cxx
new file mode 100644
index 0000000..eab3b78
--- /dev/null
+++ b/libbuild2/diagnostics.cxx
@@ -0,0 +1,138 @@
+// file      : libbuild2/diagnostics.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <libbuild2/diagnostics.hxx>
+
+#include <cstring>  // strchr()
+
+#include <libbutl/process-io.mxx>
+
+using namespace std;
+
+namespace build2
+{
+  // Diagnostics state (verbosity level, progress, etc). Keep disabled until
+  // set from options.
+  //
+  uint16_t verb = 0;
+
+  optional<bool> diag_progress_option;
+
+  bool diag_no_line = false;
+  bool diag_no_column = false;
+
+  bool stderr_term = false;
+
+  void
+  init_diag (uint16_t v, optional<bool> p, bool nl, bool nc, bool st)
+  {
+    verb = v;
+    diag_progress_option = p;
+    diag_no_line = nl;
+    diag_no_column = nc;
+    stderr_term = st;
+  }
+
+  // Stream verbosity.
+  //
+  const int stream_verb_index = ostream::xalloc ();
+
+  void
+  print_process (const char* const* args, size_t n)
+  {
+    diag_record r (text);
+    print_process (r, args, n);
+  }
+
+  void
+  print_process (diag_record& r, const char* const* args, size_t n)
+  {
+    r << butl::process_args {args, n};
+  }
+
+  // Diagnostics stack.
+  //
+  static
+#ifdef __cpp_thread_local
+  thread_local
+#else
+  __thread
+#endif
+  const diag_frame* diag_frame_stack = nullptr;
+
+  const diag_frame* diag_frame::
+  stack () noexcept
+  {
+    return diag_frame_stack;
+  }
+
+  const diag_frame* diag_frame::
+  stack (const diag_frame* f) noexcept
+  {
+    const diag_frame* r (diag_frame_stack);
+    diag_frame_stack = f;
+    return r;
+  }
+
+  // Diagnostic facility, project specifics.
+  //
+
+  void simple_prologue_base::
+  operator() (const diag_record& r) const
+  {
+    stream_verb (r.os, sverb_);
+
+    if (type_ != nullptr)
+      r << type_ << ": ";
+
+    if (mod_ != nullptr)
+      r << mod_ << "::";
+
+    if (name_ != nullptr)
+      r << name_ << ": ";
+  }
+
+  void location_prologue_base::
+  operator() (const diag_record& r) const
+  {
+    stream_verb (r.os, sverb_);
+
+    if (!loc_.empty ())
+    {
+      r << *loc_.file << ':';
+
+      if (!diag_no_line)
+      {
+        if (loc_.line != 0)
+        {
+          r << loc_.line << ':';
+
+          if (!diag_no_column)
+          {
+            if (loc_.column != 0)
+              r << loc_.column << ':';
+          }
+        }
+      }
+
+      r << ' ';
+    }
+
+    if (type_ != nullptr)
+      r << type_ << ": ";
+
+    if (mod_ != nullptr)
+      r << mod_ << "::";
+
+    if (name_ != nullptr)
+      r << name_ << ": ";
+  }
+
+  const basic_mark error ("error");
+  const basic_mark warn  ("warning");
+  const basic_mark info  ("info");
+  const basic_mark text  (nullptr, nullptr, nullptr); // No type/data/frame.
+  const fail_mark  fail  ("error");
+  const fail_end   endf;
+}