From 9fb791e9fad6c63fc1dac49f4d05ae63b8a3db9b Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 5 Jan 2016 11:55:15 +0200
Subject: Rename build directory/namespace to build2

---
 build2/search.cxx | 171 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 build2/search.cxx

(limited to 'build2/search.cxx')

diff --git a/build2/search.cxx b/build2/search.cxx
new file mode 100644
index 0000000..58384f2
--- /dev/null
+++ b/build2/search.cxx
@@ -0,0 +1,171 @@
+// file      : build2/search.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <build2/search>
+
+#include <utility>  // move()
+#include <cassert>
+
+#include <butl/filesystem>
+
+#include <build2/scope>
+#include <build2/target>
+#include <build2/prerequisite>
+#include <build2/diagnostics>
+
+using namespace std;
+using namespace butl;
+
+namespace build2
+{
+  target*
+  search_existing_target (const prerequisite_key& pk)
+  {
+    tracer trace ("search_existing_target");
+
+    const target_key& tk (pk.tk);
+
+    // Look for an existing target in this directory scope.
+    //
+    dir_path d;
+    if (tk.dir->absolute ())
+      d = *tk.dir; // Already normalized.
+    else
+    {
+      d = pk.scope->out_path ();
+
+      if (!tk.dir->empty ())
+      {
+        d /= *tk.dir;
+        d.normalize ();
+      }
+    }
+
+    auto i (targets.find (*tk.type, d, *tk.name, *tk.ext, trace));
+
+    if (i == targets.end ())
+      return 0;
+
+    target& t (**i);
+
+    level5 ([&]{trace << "existing target " << t << " for prerequisite "
+                      << pk;});
+
+    return &t;
+  }
+
+  target*
+  search_existing_file (const prerequisite_key& cpk, const dir_paths& sp)
+  {
+    tracer trace ("search_existing_file");
+
+    prerequisite_key pk (cpk); // Make a copy so we can update extension.
+    target_key& tk (pk.tk);
+    assert (tk.dir->relative ());
+
+    // Figure out the extension. Pretty similar logic to file::derive_path().
+    //
+    const string* ext (*tk.ext);
+
+    if (ext == nullptr)
+    {
+      if (auto f = tk.type->extension)
+      {
+        ext = &f (tk, *pk.scope); // Already from the pool.
+        tk.ext = &ext;
+      }
+      else
+      {
+        // What should we do here, fail or say we didn't find anything?
+        // Current think is that if the target type didn't provide the
+        // default extension, then it doesn't want us to search for an
+        // existing file (of course, if the user specified the extension
+        // explicitly, we will still do so). But let me know what you
+        // think.
+        //
+        //fail << "no default extension for prerequisite " << pk;
+        level4 ([&]{trace << "no existing file found for prerequisite "
+                          << pk;});
+        return nullptr;
+      }
+    }
+
+    // Go over paths looking for a file.
+    //
+    for (const dir_path& d: sp)
+    {
+      path f (d / *tk.dir / path (*tk.name));
+      f.normalize ();
+
+      if (!ext->empty ())
+      {
+        f += '.';
+        f += *ext;
+      }
+
+      timestamp mt (file_mtime (f));
+
+      if (mt == timestamp_nonexistent)
+        continue;
+
+      level5 ([&]{trace << "found existing file " << f << " for prerequisite "
+                        << pk;});
+
+      // Find or insert. Note: using our updated extension.
+      //
+      auto r (targets.insert (*tk.type, f.directory (), *tk.name, ext, trace));
+
+      // Has to be a file_target.
+      //
+      file& t (dynamic_cast<file&> (r.first));
+
+      level5 ([&]{trace << (r.second ? "new" : "existing") << " target "
+                        << t << " for prerequisite " << pk;});
+
+      if (t.path ().empty ())
+        t.path (move (f));
+
+      t.mtime (mt);
+      return &t;
+    }
+
+    level4 ([&]{trace << "no existing file found for prerequisite " << pk;});
+    return nullptr;
+  }
+
+  target&
+  create_new_target (const prerequisite_key& pk)
+  {
+    tracer trace ("create_new_target");
+
+    const target_key& tk (pk.tk);
+
+    // We default to the target in this directory scope.
+    //
+    dir_path d;
+    if (tk.dir->absolute ())
+      d = *tk.dir; // Already normalized.
+    else
+    {
+      d = pk.scope->out_path ();
+
+      if (!tk.dir->empty ())
+      {
+        d /= *tk.dir;
+        d.normalize ();
+      }
+    }
+
+    // Find or insert.
+    //
+    auto r (targets.insert (*tk.type, move (d), *tk.name, *tk.ext, trace));
+    assert (r.second);
+
+    target& t (r.first);
+
+    level5 ([&]{trace << "new target " << t << " for prerequisite " << pk;});
+
+    return t;
+  }
+}
-- 
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