Add support for dynamic dependencies as byproduct of script body

Specifically, the `depdb dyndep` builtin now has the --byproduct option (which
must come first). In this mode only the --file input is supported. For example:

obje{hello.o}: cxx{hello}
{{
  o = $path($>)
  t = $(o).t

  depdb dyndep --byproduct --what=header --default-type=h --file $t

  diag c++ ($<[0])

  $cxx.path $cxx.poptions $cc.poptions $cc.coptions $cxx.coptions $cxx.mode -o $o -MD -MF $t -c $path($<[0])
}}

Naturally, this mode does not support dynamic auto-generated prerequisites.
If present, such prerequisites must be specified statically in the buildfile.

Note also that the --default-prereq-type option has been rename to
--default-type.

1 files changed, 66 insertions, 36 deletions

diff --git a/libbuild2/build/script/builtin-options.ixx b/libbuild2/build/script/builtin-options.ixx
index 06575c8..c6266d0 100644
--- a/libbuild2/build/script/builtin-options.ixx
+++ b/libbuild2/build/script/builtin-options.ixx
@@ -176,157 +176,187 @@ namespace build2
   {
     namespace script
     {
-      // depdb_dep_options
+      // depdb_dyndep_options
       //
 
-      inline const path& depdb_dep_options::
+      inline const path& depdb_dyndep_options::
       file () const
       {
         return this->file_;
       }
 
-      inline path& depdb_dep_options::
+      inline path& depdb_dyndep_options::
       file ()
       {
         return this->file_;
       }
 
-      inline void depdb_dep_options::
+      inline void depdb_dyndep_options::
       file (const path& x)
       {
         this->file_ = x;
       }
 
-      inline bool depdb_dep_options::
+      inline bool depdb_dyndep_options::
       file_specified () const
       {
         return this->file_specified_;
       }
 
-      inline void depdb_dep_options::
+      inline void depdb_dyndep_options::
       file_specified (bool x)
       {
         this->file_specified_ = x;
       }
 
-      inline const string& depdb_dep_options::
+      inline const string& depdb_dyndep_options::
       format () const
       {
         return this->format_;
       }
 
-      inline string& depdb_dep_options::
+      inline string& depdb_dyndep_options::
       format ()
       {
         return this->format_;
       }
 
-      inline void depdb_dep_options::
+      inline void depdb_dyndep_options::
       format (const string& x)
       {
         this->format_ = x;
       }
 
-      inline bool depdb_dep_options::
+      inline bool depdb_dyndep_options::
       format_specified () const
       {
         return this->format_specified_;
       }
 
-      inline void depdb_dep_options::
+      inline void depdb_dyndep_options::
       format_specified (bool x)
       {
         this->format_specified_ = x;
       }
 
-      inline const string& depdb_dep_options::
+      inline const string& depdb_dyndep_options::
       what () const
       {
         return this->what_;
       }
 
-      inline string& depdb_dep_options::
+      inline string& depdb_dyndep_options::
       what ()
       {
         return this->what_;
       }
 
-      inline void depdb_dep_options::
+      inline void depdb_dyndep_options::
       what (const string& x)
       {
         this->what_ = x;
       }
 
-      inline bool depdb_dep_options::
+      inline bool depdb_dyndep_options::
       what_specified () const
       {
         return this->what_specified_;
       }
 
-      inline void depdb_dep_options::
+      inline void depdb_dyndep_options::
       what_specified (bool x)
       {
         this->what_specified_ = x;
       }
 
-      inline const dir_paths& depdb_dep_options::
+      inline const dir_paths& depdb_dyndep_options::
       include_path () const
       {
         return this->include_path_;
       }
 
-      inline dir_paths& depdb_dep_options::
+      inline dir_paths& depdb_dyndep_options::
       include_path ()
       {
         return this->include_path_;
       }
 
-      inline void depdb_dep_options::
+      inline void depdb_dyndep_options::
       include_path (const dir_paths& x)
       {
         this->include_path_ = x;
       }
 
-      inline bool depdb_dep_options::
+      inline bool depdb_dyndep_options::
       include_path_specified () const
       {
         return this->include_path_specified_;
       }
 
-      inline void depdb_dep_options::
+      inline void depdb_dyndep_options::
       include_path_specified (bool x)
       {
         this->include_path_specified_ = x;
       }
 
-      inline const string& depdb_dep_options::
-      default_prereq_type () const
+      inline const string& depdb_dyndep_options::
+      default_type () const
       {
-        return this->default_prereq_type_;
+        return this->default_type_;
       }
 
-      inline string& depdb_dep_options::
-      default_prereq_type ()
+      inline string& depdb_dyndep_options::
+      default_type ()
       {
-        return this->default_prereq_type_;
+        return this->default_type_;
       }
 
-      inline void depdb_dep_options::
-      default_prereq_type (const string& x)
+      inline void depdb_dyndep_options::
+      default_type (const string& x)
       {
-        this->default_prereq_type_ = x;
+        this->default_type_ = x;
       }
 
-      inline bool depdb_dep_options::
-      default_prereq_type_specified () const
+      inline bool depdb_dyndep_options::
+      default_type_specified () const
       {
-        return this->default_prereq_type_specified_;
+        return this->default_type_specified_;
       }
 
-      inline void depdb_dep_options::
-      default_prereq_type_specified (bool x)
+      inline void depdb_dyndep_options::
+      default_type_specified (bool x)
       {
-        this->default_prereq_type_specified_ = x;
+        this->default_type_specified_ = x;
+      }
+
+      inline const dir_path& depdb_dyndep_options::
+      cwd () const
+      {
+        return this->cwd_;
+      }
+
+      inline dir_path& depdb_dyndep_options::
+      cwd ()
+      {
+        return this->cwd_;
+      }
+
+      inline void depdb_dyndep_options::
+      cwd (const dir_path& x)
+      {
+        this->cwd_ = x;
+      }
+
+      inline bool depdb_dyndep_options::
+      cwd_specified () const
+      {
+        return this->cwd_specified_;
+      }
+
+      inline void depdb_dyndep_options::
+      cwd_specified (bool x)
+      {
+        this->cwd_specified_ = x;
       }
     }
   }