Support for --dry-run|-n mode, perform update part

1 files changed, 5 insertions, 2 deletions

diff --git a/build2/algorithm.cxx b/build2/algorithm.cxx
index 0dffb31..06ed922 100644
--- a/build2/algorithm.cxx
+++ b/build2/algorithm.cxx
@@ -1074,14 +1074,15 @@ namespace build2
     {
       // Normally will be there.
       //
-      try_rmbacklink (l, m);
+      if (!dry_run)
+        try_rmbacklink (l, m);
 
       // Skip (ad hoc) targets that don't exist.
       //
       if (!(d ? dir_exists (p) : file_exists (p)))
         return;
 
-      for (;;) // Retry/fallback loop.
+      for (; !dry_run; ) // Retry/fallback loop.
       try
       {
         switch (m)
@@ -1891,6 +1892,8 @@ namespace build2
     // below 3. Note the first extra file/directory that actually got removed
     // for diagnostics below.
     //
+    // Note that dry-run is taken care of by the filesystem functions.
+    //
     target_state er (target_state::unchanged);
     bool ed (false);
     path ep;