From 17341bc0fdd23617e3f2e81b0228ff9ecc5cb194 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 25 Aug 2021 11:21:03 +0200
Subject: Suppress loading external modules when con/disfiguring forwards

---
 bdep/deinit.cxx | 3 +++
 bdep/sync.cxx   | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/bdep/deinit.cxx b/bdep/deinit.cxx
index 0018aaf..00eba45 100644
--- a/bdep/deinit.cxx
+++ b/bdep/deinit.cxx
@@ -67,7 +67,10 @@ namespace bdep
           src /= i->path;
         }
 
+        // See sync for details on --no-external-modules.
+        //
         run_b (o,
+               "--no-external-modules",
                "disfigure:",
                "'" + src.representation () + "'@'" + out.representation () +
                "',forward");
diff --git a/bdep/sync.cxx b/bdep/sync.cxx
index 825ac3d..3ab3ab4 100644
--- a/bdep/sync.cxx
+++ b/bdep/sync.cxx
@@ -1117,7 +1117,13 @@ namespace bdep
           if (o != nullptr)
           {
             dir_path out (dir_path (cfg) /= pkg.name.string ());
+
+            // Note that --no-external-modules makes a difference for
+            // developing build system modules that require bootstrapping
+            // (which without that option would trigger a recursive sync).
+            //
             run_b (co,
+                   "--no-external-modules",
                    o,
                    "'" + src.representation () + "'@'" + out.representation () +
                    "',forward");
-- 
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