From 99d1b89ddf5e42c1ed0873f88613fbd7fd2642d7 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 21 Mar 2024 06:54:19 +0200
Subject: Improve import diagnostics

---
 libbuild2/file.cxx | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/libbuild2/file.cxx b/libbuild2/file.cxx
index ee1b6b1..c0957ad 100644
--- a/libbuild2/file.cxx
+++ b/libbuild2/file.cxx
@@ -3411,6 +3411,11 @@ namespace build2
     const target* pt (nullptr);
     const scope* iroot (nullptr); // Imported root scope.
 
+    // Original project/name as imported for diagnostics.
+    //
+    string oname (meta ? tgt.value : string ());
+    project_name oproj (meta && tgt.proj ? *tgt.proj : project_name ());
+
     pair<name, optional<dir_path>> r (
       import_search (new_value,
                      base,
@@ -3515,6 +3520,13 @@ namespace build2
     //
     if (meta)
     {
+      auto df = make_diag_frame (
+        [&oproj, &oname, &t] (const diag_record& dr)
+        {
+          if (!oproj.empty ())
+            import_suggest (dr, oproj, &t.type (), oname, false, "alternative ");
+        });
+
       // The export.metadata value should start with the version followed by
       // the metadata variable prefix.
       //
-- 
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