From aa90698a38f219bab7895128c259b78e4ecc3a5a Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 26 May 2023 14:33:30 +0200
Subject: Clean after each depdb-dyndep execution

---
 libbuild2/build/script/parser.cxx | 62 ++++++++++++++++++++++++++++++++-------
 1 file changed, 51 insertions(+), 11 deletions(-)

(limited to 'libbuild2')

diff --git a/libbuild2/build/script/parser.cxx b/libbuild2/build/script/parser.cxx
index 3b24802..85fe429 100644
--- a/libbuild2/build/script/parser.cxx
+++ b/libbuild2/build/script/parser.cxx
@@ -2340,9 +2340,29 @@ namespace build2
         command_expr cmd;
         srcout_map so_map;
 
+        // Save/restore script cleanups.
+        //
+        struct cleanups
+        {
+          build2::script::cleanups ordinary;
+          paths                    special;
+        };
+        optional<cleanups> script_cleanups;
+
+        auto cleanups_guard = make_guard (
+          [this, &script_cleanups] ()
+          {
+            if (script_cleanups)
+            {
+              swap (environment_->cleanups, script_cleanups->ordinary);
+              swap (environment_->special_cleanups, script_cleanups->special);
+            }
+          });
+
         auto init_run = [this, &ctx,
                          &lt, &ltt, &ll,
-                         prog, &file, &ops, &cmd, &so_map] ()
+                         prog, &file, &ops,
+                         &cmd, &so_map, &script_cleanups] ()
         {
           // Populate the srcout map with the -I$out_base -I$src_base pairs.
           //
@@ -2355,6 +2375,10 @@ namespace build2
 
           if (prog)
           {
+            script_cleanups = cleanups {};
+            swap (environment_->cleanups, script_cleanups->ordinary);
+            swap (environment_->special_cleanups, script_cleanups->special);
+
             cmd = parse_command_line (lt, static_cast<token_type&> (ltt));
 
             // If the output goes to stdout, then this should be a single
@@ -2374,14 +2398,6 @@ namespace build2
             // overriding the contents of the special files seems harmless and
             // consistent with what would happen if the command redirects its
             // output to a non-special file.
-            //
-            // Note: make it a maybe-cleanup in case the command cleans it
-            // up itself.
-            //
-            if (file)
-              environment_->clean (
-                {build2::script::cleanup_type::maybe, *file},
-                true /* implicit */);
           }
         };
 
@@ -2648,9 +2664,16 @@ namespace build2
               init_run ();
               first_run = false;
             }
-            else if (!prog)
+            else
             {
-              fail (ll) << "generated " << what << " without program to retry";
+              if (!prog)
+                fail (ll) << "generated " << what << " without program to retry";
+
+              // Drop dyndep cleanups accumulated on the previous run.
+              //
+              assert (script_cleanups); // Sanity check.
+              environment_->cleanups.clear ();
+              environment_->special_cleanups.clear ();
             }
 
             // Save the timestamp just before we run the command. If we depend
@@ -2704,8 +2727,17 @@ namespace build2
                 iss.exceptions (istream::badbit);
               }
               else
+              {
                 build2::script::run (
                   *environment_, cmd, nullptr /* iteration_index */, li, ll);
+
+                // Note: make it a maybe-cleanup in case the command cleans it
+                // up itself.
+                //
+                environment_->clean (
+                  {build2::script::cleanup_type::maybe, *file},
+                  true /* implicit */);
+              }
             }
 
             ifdstream ifs (ifdstream::badbit);
@@ -2862,10 +2894,18 @@ namespace build2
               }
             }
 
+            if (file)
+              ifs.close ();
+
             // Bail out early if we have deferred a failure.
             //
             if (deferred_failure)
               return;
+
+            // Clean after each depdb-dyndep execution.
+            //
+            if (prog)
+              clean (*environment_, ll);
           }
         }
 
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