From ae579402c8c64ea8ceea2e9fcee5097b3c53e353 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 13 Oct 2016 18:20:35 +0200
Subject: Minor dependency cleanup

---
 build2/utility.cxx | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 54 insertions(+), 1 deletion(-)

(limited to 'build2/utility.cxx')

diff --git a/build2/utility.cxx b/build2/utility.cxx
index 1383729..43a5370 100644
--- a/build2/utility.cxx
+++ b/build2/utility.cxx
@@ -8,7 +8,6 @@
 #include <cstdlib>  // strtol()
 #include <iostream> // cerr
 
-#include <build2/context>
 #include <build2/variable>
 #include <build2/diagnostics>
 
@@ -85,6 +84,60 @@ namespace build2
     return l;
   }
 
+  dir_path work;
+  dir_path home;
+  const dir_path* relative_base = &work;
+
+  string
+  diag_relative (const path& p, bool cur)
+  {
+    if (p.string () == "-")
+      return "<stdin>";
+
+    const path& b (*relative_base);
+
+    if (p.absolute ())
+    {
+      if (p == b)
+        return cur ? "." + p.separator_string () : string ();
+
+#ifndef _WIN32
+      if (!home.empty ())
+      {
+        if (p == home)
+          return "~" + p.separator_string ();
+      }
+#endif
+
+      path rb (relative (p));
+
+#ifndef _WIN32
+      if (!home.empty ())
+      {
+        if (rb.relative ())
+        {
+          // See if the original path with the ~/ shortcut is better that the
+          // relative to base.
+          //
+          if (p.sub (home))
+          {
+            path rh (p.leaf (home));
+            if (rb.size () > rh.size () + 2) // 2 for '~/'
+              return "~/" + move (rh).representation ();
+          }
+        }
+        else if (rb.sub (home))
+          return "~/" + rb.leaf (home).representation ();
+      }
+
+#endif
+
+      return move (rb).representation ();
+    }
+
+    return p.representation ();
+  }
+
   process_path
   run_search (const char*& args0)
   try
-- 
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