4 files changed, 246 insertions, 137 deletions
diff --git a/src/sdp.d b/src/sdp.d
index 20133cd..fb5728e 100755
--- a/src/sdp.d
+++ b/src/sdp.d
@@ -2,9 +2,11 @@
 /+
   sdp
 +/
-/+ sdp: sisu document parser, see http://sisudoc.org +/
 import
   compile_time_info,
+  abstraction;
+/+ sdp: sisu document parser, see http://sisudoc.org +/
+import
   ao_abstract_doc_source,
   ao_conf_make_meta,
   ao_conf_make_meta_native,
@@ -47,7 +49,6 @@ void main(string[] args) {
   mixin SiSUnode;
   mixin SiSUbiblio;
   mixin SiSUrgxInitFlags;
-  mixin SiSUconfigSDLangHub;
   mixin outputHub;
   /+
   struct DocumentParts {
@@ -161,9 +162,12 @@ void main(string[] args) {
       arg_unrecognized ~= " " ~ arg;
     }
   }
-  auto conf = ConfigHub();
-  auto sdl_root_configuration = conf.configSDLang("conf.sdl");
-  auto sdl_root_doc_make = conf.configSDLang("sisu_document_make");
+  auto env = [
+    "pwd" : environment["PWD"],
+    "home" : environment["HOME"],
+  ];
+  auto sdl_root_configuration = ConfigHub!()("conf.sdl", env);
+  auto sdl_root_doc_make = ConfigHub!()("sisu_document_make", env);
   auto confsdl = HeaderExtractSDL();
   auto conf_settings_aa = confsdl.configSettingsSDLangToAAmake(sdl_root_configuration);
   auto conf_doc_make_aa = confsdl.documentMakeSDLangToAAmake(sdl_root_doc_make);
@@ -191,69 +195,12 @@ void main(string[] args) {
         match(fn_src, rgx.src_pth),
         "not a sisu markup filename"
       );
-      /+ ↓ read file (filename with path) +/
-      /+ ↓ file tuple of header and content +/
-      auto _0_header_1_body_content_2_insert_filelist_tuple =
-        SiSUmarkupRaw!()(fn_src);
-      static assert(!isTypeTuple!(_0_header_1_body_content_2_insert_filelist_tuple));
-      static assert(_0_header_1_body_content_2_insert_filelist_tuple.length==3);
-      debug(header_and_body) {
-        writeln(header);
-        writeln(_0_header_1_body_content_2_insert_filelist_tuple.length);
-        writeln(_0_header_1_body_content_2_insert_filelist_tuple.length[1][0]);
-      }
-      /+ ↓ split header into make and meta +/
-      auto _0_make_1_dochead_meta_tuple =
-        SiSUheaderExtractHub!()(_0_header_1_body_content_2_insert_filelist_tuple[0], conf_doc_make_aa);
-      static assert(!isTypeTuple!(_0_make_1_dochead_meta_tuple));
-      static assert(_0_make_1_dochead_meta_tuple.length==2);
-      /+ ↓ document abstraction: process document, return abstraction as tuple +/
-      auto t = SiSUdocAbstraction!()(
-        (_0_header_1_body_content_2_insert_filelist_tuple[1]),
-        (_0_make_1_dochead_meta_tuple[0]),
-        (_0_make_1_dochead_meta_tuple[1]),
-        _opt_action_bool
-      );
+      auto t =
+        SiSUabstraction!()(fn_src, _opt_action_bool, env);
       static assert(!isTypeTuple!(t));
-      static assert(t.length==3);
-      auto doc_abstraction = t[0]; // head ~ toc ~ contents ~ endnotes_seg ~ glossary ~ bibliography ~ bookindex ~blurb;
-      string[][string] _document_section_keys_sequenced = t[1];
-      string[] _doc_html_segnames = t[2];
-      struct DocumentMatters {
-        string[] keys_seq_seg() {
-          string[] _k = _document_section_keys_sequenced["seg"];
-          return _k;
-        }
-        string[] keys_seq_scroll() {
-          string[] _k = _document_section_keys_sequenced["scroll"];
-          return _k;
-        }
-        string[] segnames() {
-          string[] _k = _doc_html_segnames;
-          return _k;
-        }
-        auto dochead_make() {
-          string[string][string] _k = _0_make_1_dochead_meta_tuple[0];
-          return _k;
-        }
-        auto dochead_meta() {
-          string[string][string] _k =  _0_make_1_dochead_meta_tuple[1];
-          return _k;
-        }
-        auto source_filename() {
-          string _k = fn_src;
-          return _k;
-        }
-        auto file_insert_list() {
-          string[] _k = _0_header_1_body_content_2_insert_filelist_tuple[2];
-          return _k;
-        }
-        auto opt_action_bool() {
-          bool[string] _k = _opt_action_bool;
-          return _k;
-        }
-      }
-      auto doc_matters = DocumentMatters();
+      static assert(t.length==2);
+      auto doc_abstraction = t[0];
+      auto doc_matters = t[1];
       /+ ↓ debugs +/
       debug(checkdoc) {
         SiSUdebugs!()(doc_abstraction, doc_matters);
@@ -269,16 +216,18 @@ void main(string[] args) {
             fn_src
           );
         }
-        destroy(_0_header_1_body_content_2_insert_filelist_tuple);
-        destroy(t);
-        destroy(doc_abstraction);
-        destroy(_doc_html_segnames);
+        // destroy(_0_header_1_body_content_2_insert_filelist_tuple);
+        // destroy(t);
+        // destroy(doc_abstraction);
+        // // destroy(doc_ao_make_aa);
+        // // destroy(doc_ao_meta_aa);
+        // destroy(_doc_html_segnames);
         destroy(fn_src);
       }
     } else {
       /+ no recognized filename provided +/
       writeln("no recognized filename");
-      break;
+      break; // terminate, stop
     }
   }
 }
diff --git a/src/sdp/abstraction.d b/src/sdp/abstraction.d
new file mode 100644
index 0000000..d91618e
--- /dev/null
+++ b/src/sdp/abstraction.d
@@ -0,0 +1,121 @@
+template SiSUabstraction() {
+  /+ sdp: sisu document parser, see http://sisudoc.org +/
+  import
+    ao_abstract_doc_source,
+    ao_conf_make_meta,
+    ao_conf_make_meta_native,
+    ao_conf_make_meta_sdlang,
+    ao_defaults,
+    ao_output_debugs,
+    ao_read_config_files,
+    ao_read_source_files,
+    ao_rgx,
+    output_hub;
+  /+ sdlang http://sdlang.org +/
+  import sdlang;                            // sdlang.d
+  /+ std +/
+  private import
+    std.algorithm,
+    std.array,
+    std.container,
+    std.exception,
+    std.getopt,
+    std.json,
+    std.process,
+    std.stdio,
+    std.file,
+    std.path,
+    std.range,
+    std.regex,
+    std.string,
+    std.traits,
+    std.typecons,
+    std.utf,
+    std.conv : to;
+  mixin SiSUrgxInit;
+  mixin SiSUregisters;
+  mixin SiSUheaderExtractSDLang;
+  mixin SiSUnode;
+  mixin SiSUbiblio;
+  mixin SiSUrgxInitFlags;
+  mixin outputHub;
+  // auto sdl_root_configuration = ConfigHub!()("conf.sdl", env);
+  // auto sdl_root_doc_make = ConfigHub!()("sisu_document_make", env);
+  // auto confsdl = HeaderExtractSDL();
+  // auto conf_settings_aa = confsdl.configSettingsSDLangToAAmake(sdl_root_configuration);
+  // auto conf_doc_make_aa = confsdl.documentMakeSDLangToAAmake(sdl_root_doc_make);
+  auto rgx = Rgx();
+  auto SiSUabstraction(Fn,O,E)(Fn fn_src, O opts, E env){
+    auto sdl_root_configuration = ConfigHub!()("conf.sdl", env);
+    auto sdl_root_doc_make = ConfigHub!()("sisu_document_make", env);
+    auto confsdl = HeaderExtractSDL();
+    auto conf_settings_aa = confsdl.configSettingsSDLangToAAmake(sdl_root_configuration);
+    auto conf_doc_make_aa = confsdl.documentMakeSDLangToAAmake(sdl_root_doc_make);
+    /+ ↓ read file (filename with path) +/
+    /+ ↓ file tuple of header and content +/
+    auto _0_header_1_body_content_2_insert_filelist_tuple =
+      SiSUmarkupRaw!()(fn_src);
+    static assert(!isTypeTuple!(_0_header_1_body_content_2_insert_filelist_tuple));
+    static assert(_0_header_1_body_content_2_insert_filelist_tuple.length==3);
+    debug(header_and_body) {
+      writeln(header);
+      writeln(_0_header_1_body_content_2_insert_filelist_tuple.length);
+      writeln(_0_header_1_body_content_2_insert_filelist_tuple.length[1][0]);
+    }
+    /+ ↓ split header into make and meta +/
+    auto _0_make_1_dochead_meta_tuple =
+      SiSUheaderExtractHub!()(_0_header_1_body_content_2_insert_filelist_tuple[0], conf_doc_make_aa);
+    static assert(!isTypeTuple!(_0_make_1_dochead_meta_tuple));
+    static assert(_0_make_1_dochead_meta_tuple.length==2);
+    /+ ↓ document abstraction: process document, return abstraction as tuple +/
+    auto da = SiSUdocAbstraction!()(
+      (_0_header_1_body_content_2_insert_filelist_tuple[1]),
+      (_0_make_1_dochead_meta_tuple[0]),
+      (_0_make_1_dochead_meta_tuple[1]),
+      opts
+    );
+    static assert(!isTypeTuple!(da));
+    static assert(da.length==3);
+    auto doc_abstraction = da[0]; // head ~ toc ~ contents ~ endnotes_seg ~ glossary ~ bibliography ~ bookindex ~blurb;
+    string[][string] _document_section_keys_sequenced = da[1];
+    string[] _doc_html_segnames = da[2];
+    struct DocumentMatters {
+      string[] keys_seq_seg() {
+        string[] _k = _document_section_keys_sequenced["seg"];
+        return _k;
+      }
+      string[] keys_seq_scroll() {
+        string[] _k = _document_section_keys_sequenced["scroll"];
+        return _k;
+      }
+      string[] segnames() {
+        string[] _k = _doc_html_segnames;
+        return _k;
+      }
+      auto dochead_make() {
+        string[string][string] _k = _0_make_1_dochead_meta_tuple[0];
+        return _k;
+      }
+      auto dochead_meta() {
+        string[string][string] _k =  _0_make_1_dochead_meta_tuple[1];
+        return _k;
+      }
+      auto source_filename() {
+        string _k = fn_src;
+        return _k;
+      }
+      auto file_insert_list() {
+        string[] _k = _0_header_1_body_content_2_insert_filelist_tuple[2];
+        return _k;
+      }
+      auto opt_action_bool() {
+        bool[string] _k = opts;
+        return _k;
+      }
+    }
+    auto doc_matters = DocumentMatters();
+    auto t = tuple(doc_abstraction, doc_matters);
+    static assert(t.length==2);
+    return t;
+  }
+}
diff --git a/src/sdp/ao_read_config_files.d b/src/sdp/ao_read_config_files.d
index 6308df2..2e1bca6 100644
--- a/src/sdp/ao_read_config_files.d
+++ b/src/sdp/ao_read_config_files.d
@@ -3,88 +3,122 @@
   - read config files<BR>
   ao_config_files.d
 +/
-template SiSUconfigIn() {
+template ConfigIn() {
   private import
+    std.algorithm,
+    std.array,
+    std.container,
     std.exception,
     std.stdio,
+    std.file,
+    std.path,
+    std.range,
+    std.regex,
+    std.string,
+    std.traits,
+    std.typecons,
+    std.uni,
     std.utf,
     std.conv : to;
-  private
-  struct ConfigIn {
-    private import std.file;
-    final private string readInConfigFile(string conf_sdl) {
-      string dot_pwd = chainPath(to!string(environment["PWD"]), ".sisu").array;
-      string underscore_pwd = chainPath(to!string(environment["PWD"]), "_sisu").array;
-      string dot_home = chainPath(to!string(environment["HOME"]), ".sisu").array;
-      string[] possible_config_path_locations = [
-        dot_pwd,
-        underscore_pwd,
-        dot_home,
-        "/etc/sisu"
-      ];
-      string config_file_str;
-      foreach(pth; possible_config_path_locations) {
-        auto conf_file = format(
-          "%s/%s",
-          pth,
-          conf_sdl,
-        );
-        try {
-          if (exists(conf_file)) {
-            debug(configfile) {
-              writeln(conf_file);
-            }
-            config_file_str = readText(conf_file);
-            break;
+  import std.file;
+  final string ConfigIn(C,E)(C conf_sdl, E env) {
+    string dot_pwd = chainPath(to!string(env["pwd"]), ".sisu").array;
+    string underscore_pwd = chainPath(to!string(env["pwd"]), "_sisu").array;
+    string dot_home = chainPath(to!string(env["home"]), ".sisu").array;
+    string[] possible_config_path_locations = [
+      dot_pwd,
+      underscore_pwd,
+      dot_home,
+      "/etc/sisu"
+    ];
+    string config_file_str;
+    foreach(pth; possible_config_path_locations) {
+      auto conf_file = format(
+        "%s/%s",
+        pth,
+        conf_sdl,
+      );
+      try {
+        if (exists(conf_file)) {
+          debug(configfile) {
+            writeln(conf_file);
           }
-        }
-        catch (ErrnoException ex) {
-        }
-        catch (FileException ex) {
+          config_file_str = readText(conf_file);
+          break;
         }
       }
-      return config_file_str;
+      catch (ErrnoException ex) {
+      }
+      catch (FileException ex) {
+      }
     }
+    return config_file_str;
   }
 }
 /+
 
 +/
-template SiSUconfigSDLang() {
-  struct ConfigSDLangRootTag {
-    private auto configSDLangRootTag(string configuration, string conf_sdl_filename) {
-      Tag sdl_root_conf;
-      try {
-        sdl_root_conf = parseSource(configuration);
-      }
-      catch(ParseException e) {
-        stderr.writeln("SDLang problem with content for ", conf_sdl_filename);
-        stderr.writeln(e.msg);
-      }
-      debug(sdlang) {
-        Value output_dir_structure_by = sdl_root_conf.tags["output_dir_structure_by"][0].values[0];
-        assert(output_dir_structure_by.type == typeid(string));
-        writeln(output_dir_structure_by);
-        writeln("conf SDL:");
-        writeln(sdl_root_conf.toSDLDocument());
-      }
-      return sdl_root_conf;
+template ConfigSDLang() {
+  import sdlang;
+  private import
+    std.algorithm,
+    std.array,
+    std.container,
+    std.exception,
+    std.stdio,
+    std.file,
+    std.path,
+    std.range,
+    std.regex,
+    std.string,
+    std.traits,
+    std.typecons,
+    std.uni,
+    std.utf,
+    std.conv : to;
+  auto ConfigSDLang(string configuration, string conf_sdl_filename) {
+    Tag sdl_root_conf;
+    try {
+      sdl_root_conf = parseSource(configuration);
     }
+    catch(ParseException e) {
+      stderr.writeln("SDLang problem with content for ", conf_sdl_filename);
+      stderr.writeln(e.msg);
+    }
+    debug(sdlang) {
+      Value output_dir_structure_by = sdl_root_conf.tags["output_dir_structure_by"][0].values[0];
+      assert(output_dir_structure_by.type == typeid(string));
+      writeln(output_dir_structure_by);
+      writeln("conf SDL:");
+      writeln(sdl_root_conf.toSDLDocument());
+    }
+    return sdl_root_conf;
   }
 }
 /+
 
 +/
-template SiSUconfigSDLangHub() {
-  mixin SiSUconfigIn;
-  mixin SiSUconfigSDLang;
-  struct ConfigHub {
-    final private auto configSDLang(string conf_sdl) {
-      auto conf_get = ConfigIn();
-      auto configuration = conf_get.readInConfigFile(conf_sdl);
-      auto conf = ConfigSDLangRootTag();
-      auto sdl_root = conf.configSDLangRootTag(configuration, conf_sdl);
-      return sdl_root;
-    }
+template ConfigHub() {
+  private import
+    std.algorithm,
+    std.array,
+    std.container,
+    std.exception,
+    std.stdio,
+    std.file,
+    std.path,
+    std.range,
+    std.regex,
+    std.string,
+    std.traits,
+    std.typecons,
+    std.uni,
+    std.utf,
+    std.conv : to;
+  
+  final auto ConfigHub(C,E)(C conf_sdl, E env) {
+    auto configuration = ConfigIn!()(conf_sdl, env);
+    auto sdl_root = ConfigSDLang!()(configuration, conf_sdl);
+    return sdl_root;
   }
 }
diff --git a/src/sdp/ao_read_source_files.d b/src/sdp/ao_read_source_files.d
index c7616a2..a6c0199 100644
--- a/src/sdp/ao_read_source_files.d
+++ b/src/sdp/ao_read_source_files.d
@@ -7,13 +7,19 @@ template SiSUmarkupRaw() {
   private import
     ao_rgx;
   private import
+    std.algorithm,
     std.array,
+    std.container,
     std.exception,
+    std.stdio,
+    std.file,
     std.path,
+    std.range,
     std.regex,
-    std.stdio,
+    std.string,
     std.traits,
     std.typecons,
+    std.uni,
     std.utf,
     std.conv : to;
   mixin SiSUrgxInit;
@@ -55,7 +61,6 @@ template SiSUmarkupRaw() {
       return t;
     }
   }
-  private
   struct MarkupRawUnit {
     private import std.file;
     final private string readInMarkupSource(in char[] fn_src) {