0.23.0 make image list available early for sisupod

- have information needed for building source pods available early
- don't do extra scan (for images) unless building of source pod
  requested

6 files changed, 255 insertions, 113 deletions

diff --git a/org/meta_read_source_files.org b/org/meta_read_source_files.org
index 6b44dfb..8062f46 100644
--- a/org/meta_read_source_files.org
+++ b/org/meta_read_source_files.org
@@ -26,7 +26,7 @@ import
   std.path;
 #+END_SRC
 
-* 1. get _config file_ (read in)            :module:sdp:meta_read_config_files:
+* A. get _config file_ (read in)            :module:sdp:meta_read_config_files:
 ** 0. module template
 
 #+BEGIN_SRC d :tangle ../src/sdp/meta/read_config_files.d
@@ -142,8 +142,8 @@ final auto configRead(C,E)(C conf_sdl, E env) {
 }
 #+END_SRC
 
-* 2. get _markup source_, read file         :module:sdp:meta_read_source_files:
-** 0. module template
+* B. get _markup source_, read file         :module:sdp:meta_read_source_files:
+** 0. module template (includes tuple)
 
 #+BEGIN_SRC d :tangle ../src/sdp/meta/read_source_files.d
 /++
@@ -158,10 +158,19 @@ static template SiSUrawMarkupContent() {
   <<imports_std>>
   mixin SiSUrgxInit;
   static auto rgx = Rgx();
+  string[] _images=[];
+  auto _extract_images(S)(S content_block) {
+    string[] images_;
+    auto _content_block = content_block.to!string;
+    if (auto m = _content_block.matchAll(rgx.image)) {
+      images_ ~= m.captures[1].to!string;
+    }
+    return images_;
+  }
   auto rawsrc = RawMarkupContent();
-  auto SiSUrawMarkupContent(Fn)(Fn fn_src) {
+  auto SiSUrawMarkupContent(O,Fn)(O _opt_action, Fn fn_src) {
     auto _0_header_1_body_content_2_insert_filelist_tuple =
-      rawsrc.sourceContentSplitIntoHeaderAndBody(rawsrc.sourceContent(fn_src), fn_src);
+      rawsrc.sourceContentSplitIntoHeaderAndBody(_opt_action, rawsrc.sourceContent(fn_src), fn_src);
     return _0_header_1_body_content_2_insert_filelist_tuple;
   }
   struct RawMarkupContent {
@@ -171,9 +180,10 @@ static template SiSUrawMarkupContent() {
         raw.markupSourceReadIn(fn_src);
       return source_txt_str;
     }
-    final auto sourceContentSplitIntoHeaderAndBody(in string source_txt_str, in string fn_src="") {
+    final auto sourceContentSplitIntoHeaderAndBody(O)(O _opt_action, in string source_txt_str, in string fn_src="") {
       auto raw = MarkupRawUnit();
       string[] insert_file_list;
+      string[] images_list;
       auto t =
         raw.markupSourceHeaderContentRawLineTupleArray(source_txt_str);
       auto header_raw = t[0];
@@ -181,17 +191,25 @@ static template SiSUrawMarkupContent() {
       if (fn_src.match(rgx.src_fn_master)) { // filename with path needed if master file (.ssm) not otherwise
         auto ins = Inserts();
         auto tu =
-          ins.scan_master_src_for_insert_files_and_import_content(sourcefile_body_content, fn_src);
+          ins.scan_master_src_for_insert_files_and_import_content(_opt_action, sourcefile_body_content, fn_src);
         static assert(!isTypeTuple!(tu));
         sourcefile_body_content = tu[0];
         insert_file_list = tu[1].dup;
+        images_list = tu[2].dup;
+      } else if (_opt_action.source || _opt_action.sisupod) {
+        auto ins = Inserts();
+        auto tu =
+          ins.scan_master_src_for_insert_files_and_import_content(_opt_action, sourcefile_body_content, fn_src);
+        static assert(!isTypeTuple!(tu));
+        images_list = tu[2].dup;
       }
       t = tuple(
         header_raw,
         sourcefile_body_content,
-        insert_file_list
+        insert_file_list,
+        images_list
       );
-      static assert(t.length==3);
+      static assert(t.length==4);
       return t;
     }
   }
@@ -206,9 +224,10 @@ static template SiSUrawMarkupContent() {
   }
   struct Inserts {
     import sdp.meta.defaults;
-    auto scan_subdoc_source(
+    auto scan_subdoc_source(O)(
+      O        _opt_action,
       char[][] markup_sourcefile_insert_content,
-      string fn_src
+      string   fn_src
     ) {
       mixin SiSUrgxInitFlags;
       <<meta_inserts_scan>>
@@ -217,10 +236,12 @@ static template SiSUrawMarkupContent() {
       } // end src subdoc (inserts) loop
       <<meta_inserts_scan_post>>
     }
-    auto scan_master_src_for_insert_files_and_import_content(
+    auto scan_master_src_for_insert_files_and_import_content(O)(
+      O        _opt_action,
       char[][] sourcefile_body_content,
-      string fn_src
+      string   fn_src
     ) {
+      import std.algorithm;
       mixin SiSUrgxInitFlags;
       <<meta_master_doc_scan_for_insert_filenames>>
       foreach (line; sourcefile_body_content) {
@@ -321,12 +342,18 @@ auto markupSourceReadIn(in string fn_src) {
 }
 #+END_SRC
 
-**** tuple header and body content
+**** tuple (a) header, (b) body content, (c) file insert list & (d) image list?
+
+- header
+- body content
+- file insert list
+- [image list?]
 
 #+name: meta_markup_source_raw_tuple_of_header_and_body
 #+BEGIN_SRC d
 auto markupSourceHeaderContentRawLineTupleArray(in string source_txt_str) {
   string[] file_insert_list = [];
+  string[] images_list = [];
   auto hc = header0Content1(source_txt_str);
   auto header = hc[0];
   char[] source_txt = hc[1];
@@ -334,7 +361,8 @@ auto markupSourceHeaderContentRawLineTupleArray(in string source_txt_str) {
   auto t = tuple(
     header,
     source_line_arr,
-    file_insert_list
+    file_insert_list,
+    images_list
   );
   return t;
 }
@@ -432,20 +460,30 @@ if (type1["curly_code"] == 1) {
       markup_sourcesubfile_insert_content.length
     );
   }
+  if (_opt_action.source || _opt_action.sisupod) {
+    _images ~= _extract_images(markup_sourcesubfile_insert_content);
+  }
   auto ins = Inserts();
   /+
-    1. load file,
-    2. read lines;
-    3. scan lines,
-    4. if filename insert, and insert filename
-    5.   repeat 1
-    6. else
-    7.   add line to new array;
+    - 1. load file
+    - 2. read lines
+    - 3. scan lines
+      - a. if filename insert, and insert filename
+         - repeat 1
+      - b. else
+         - add line to new array;
+         - build image list, search for any image files to add to image list
   +/
 } else {
   type1["header_make"] = 0;
   type1["header_meta"] = 0;
-  contents_insert ~= line;
+  contents_insert ~= line; // images to extract for image list?
+  if (_opt_action.source || _opt_action.sisupod) {
+    auto _image_linelist = _extract_images(line);
+    if (_image_linelist.length > 0) {
+      _images ~= _image_linelist;
+    }
+  }
 }
 #+END_SRC
 
@@ -453,7 +491,11 @@ if (type1["curly_code"] == 1) {
 
 #+name: meta_inserts_scan_post
 #+BEGIN_SRC d
-return contents_insert;
+auto t = tuple(
+  contents_insert,
+  _images
+);
+return t;
 #+END_SRC
 
 *** scan document source                                         :scan_src:
@@ -465,6 +507,8 @@ char[][] contents;
 auto type = flags_type_init;
 auto fn_pth_full = fn_src.match(rgx.src_pth);
 auto markup_src_file_path = fn_pth_full.captures[1];
+char[][] contents_insert;
+string[] _images =[];
 string[] insert_file_list =[];
 #+END_SRC
 
@@ -511,22 +555,36 @@ if (type["curly_code"] == 1) {
     );
   }
   auto ins = Inserts();
-  auto contents_insert = ins.scan_subdoc_source(
+  auto contents_insert_tu = ins.scan_subdoc_source(
+    _opt_action,
     markup_sourcefile_insert_content,
     to!string(fn_src_insert)
   );
-  contents ~= contents_insert;
+  contents ~= contents_insert_tu[0]; // images to extract for image list?
+  if (_opt_action.source || _opt_action.sisupod) {
+    auto _image_linelist = _extract_images(contents_insert_tu[0]);
+    if (_image_linelist.length > 0) {
+      _images ~= _image_linelist;
+    }
+  }
   /+
-    1. load file,
-    2. read lines;
-    3. scan lines,
-    4. if filename insert, and insert filename
-    5.   repeat 1
-    6. else
-    7.   add line to new array;
+    - 1. load file
+    - 2. read lines
+    - 3. scan lines
+      - a. if filename insert, and insert filename
+         - repeat 1
+      - b. else
+         - add line to new array;
+         - build image list, search for any image files to add to image list
   +/
 } else {
   contents ~= line;
+  if (_opt_action.source || _opt_action.sisupod) {
+    auto _image_linelist = _extract_images(line);
+    if (_image_linelist.length > 0) {
+      _images ~= _image_linelist;
+    }
+  }
 }
 #+END_SRC
 
@@ -534,13 +592,18 @@ if (type["curly_code"] == 1) {
 
 #+name: meta_master_doc_scan_for_insert_filenames_post
 #+BEGIN_SRC d
+string[] images = [];
+foreach(i; uniq(_images.sort())) {
+  images ~= i;
+}
 debug(insert_file) {
   writeln(__LINE__);
   writeln(contents.length);
 }
 auto t = tuple(
   contents,
-  insert_file_list
+  insert_file_list,
+  images
 );
 return t;
 #+END_SRC
diff --git a/org/sdp.org b/org/sdp.org
index 650fb21..27b6cc8 100644
--- a/org/sdp.org
+++ b/org/sdp.org
@@ -26,7 +26,7 @@ struct Version {
   int minor;
   int patch;
 }
-enum ver = Version(0, 22, 0);
+enum ver = Version(0, 23, 0);
 #+END_SRC
 
 ** compilation restrictions (supported compilers)
@@ -78,7 +78,7 @@ void main(string[] args) {
   <<sdp_args>>
   <<sdp_env>>
   <<sdp_do_selected>>
-  if (_manifests.length > 1) { // _manifests[0] is dummy element used in initialization to be removed
+  if (_manifests.length > 1) { // _manifests[0] initialized dummy element
     foreach(manifest; _manifests[1..$]) {
       if (!empty(manifest.src_fn)) {
         <<sdp_each_file_do_scope>>
@@ -477,7 +477,7 @@ struct OptActions {
 auto _opt_action = OptActions();
 #+END_SRC
 
-***** getopt processing path
+***** getopt processing path, _manifest[]                                      >>
 
 #+NAME: sdp_args
 #+BEGIN_SRC d
@@ -485,19 +485,19 @@ auto _env = [
   "pwd" : environment["PWD"],
   "home" : environment["HOME"],
 ];
-auto _manifest = PodManifest!()();
-auto _manifest_plus = PodMatters!()(_opt_action, _env);
-auto _manifests = [ _manifest_plus ];
+auto _manifest_start = PodManifest!()();
+auto _manifest_matter = PodMatters!()(_opt_action, _env);
+auto _manifests = [ _manifest_matter ];
 foreach(arg; args[1..$]) {
-  _manifest = PodManifest!()(arg);
+  _manifest_start = PodManifest!()(arg);
   if (arg.match(rgx.flag_action)) {
     flag_action ~= " " ~ arg;   // flags not taken by getopt
   } else if (arg.match(rgx.src_pth)) {
     _manifests ~= PodMatters!()(_opt_action, _env, arg, arg); // gather input markup source file names for processing
-  } else if (_manifest.pod_manifest_file_with_path) {
+  } else if (_manifest_start.pod_manifest_file_with_path) {
     string contents_location_raw_;
     string contents_location_;
-    string sisudoc_txt_ = _manifest.pod_manifest_file_with_path;
+    string sisudoc_txt_ = _manifest_start.pod_manifest_file_with_path;
     enforce(
       exists(sisudoc_txt_)!=0,
       "file not found: «" ~
@@ -536,8 +536,8 @@ foreach(arg; args[1..$]) {
         || (contents_location_pth_).match(lang_rgx_)
       ) {
         auto _fns = (((tmp_dir_).chainPath(contents_location_pth_)).array).to!(string);
-        _manifest_plus = PodMatters!()(_opt_action, _env, arg, _fns, contents_locations_arr);
-        _manifests ~= _manifest_plus; // TODO how to capture?
+        _manifest_matter = PodMatters!()(_opt_action, _env, arg, _fns, contents_locations_arr);
+        _manifests ~= _manifest_matter; // TODO how to capture?
       }
     }
   } else if (arg.match(rgx.src_pth_zip)) {
@@ -676,7 +676,7 @@ module sdp.meta.metadoc;
 template SiSUabstraction() {
   <<imports_sdp>>
   <<sdp_mixin>>
-  enum headBody { header, body_content, insert_filelist }
+  enum headBody { header, body_content, insert_file_list, image_list }
   enum makeMeta { make, meta }
   enum docAbst  { doc_abstraction, section_keys, segnames, segnames_0_4, images }
   static auto rgx = Rgx();
@@ -697,37 +697,52 @@ template SiSUabstraction() {
 }
 #+END_SRC
 
-** 1. (a) _read in raw file_ (b) split content into: _doc header & doc content_
+** 1. raw file content split, doc: _header_, _content_ +(lists: subdocs? images?)  >>
 - [[./meta_read_source_files.org][meta_read_source_files]]
 
 - read in the _marked up source document_ and
   - split the document into:
     - document header
     - document body
-  - if a master document make a list of insert files
+      - from markup source
+      - if master document from sub documents content
+  - if a master document
+    - make a list of insert files
+  - if build source pod requested
+    - scan for list of images
+      (action avoided if not needed at this stage)
+
 - _return a tuple of_:
   - header
   - body
   - insert file list
+  - image list (if build source pod requested)
+
+if build source pod requested all information needed to build it available at this point
+  - manifest related information  _manifest
+  - insert file list              _header_body_insertfilelist_imagelist[headBody.insert_file_list]
+  - image list                    _header_body_insertfilelist_imagelist[headBody.image_list]
 
 #+NAME: sdp_each_file_do_read_and_split_sisu_markup_file_content_into_header_and_body
 #+BEGIN_SRC d
 /+ ↓ read file (filename with path) +/
 /+ ↓ file tuple of header and content +/
 debug(steps) {
-  writeln(__LINE__, ":", __FILE__, ": step1 commence → (get document header & body & insert files)");
+  writeln(__LINE__, ":", __FILE__,
+    ": step1 commence → (get document header & body & insert file list & if needed image list)"
+  );
 }
-auto _header_body_inserts =
-  SiSUrawMarkupContent!()(_manifest.src_fn);
-static assert(!isTypeTuple!(_header_body_inserts));
-static assert(_header_body_inserts.length==3);
+auto _header_body_insertfilelist_imagelist =
+  SiSUrawMarkupContent!()(_opt_action, _manifest.src_fn);
+static assert(!isTypeTuple!(_header_body_insertfilelist_imagelist));
+static assert(_header_body_insertfilelist_imagelist.length==4);
 debug(steps) {
   writeln(__LINE__, ":", __FILE__, ": step1 complete");
 }
 debug(header_and_body) {
   writeln(header);
-  writeln(_header_body_inserts.length);
-  writeln(_header_body_inserts.length[headBody.body_content][0]);
+  writeln(_header_body_insertfilelist_imagelist.length);
+  writeln(_header_body_insertfilelist_imagelist.length[headBody.body_content][0]);
 }
 #+END_SRC
 
@@ -748,16 +763,18 @@ debug(header_and_body) {
 #+BEGIN_SRC d
 /+ ↓ split header into make and meta +/
 debug(steps) {
-  writeln(__LINE__, ":", __FILE__, ": step2 commence → (doc header: make & meta as struct)");
+  writeln(__LINE__, ":", __FILE__,
+    ": step2 commence → (doc header: make & meta as struct)"
+   );
 }
 auto _make_and_meta_struct =
-  docHeaderMakeAndMetaTupExtractAndConvertToStruct!()(conf_files_composite_make, _header_body_inserts[headBody.header]); // breakage ...
+  docHeaderMakeAndMetaTupExtractAndConvertToStruct!()(conf_files_composite_make, _header_body_insertfilelist_imagelist[headBody.header]); // breakage ...
 debug(steps) {
   writeln(__LINE__, ":", __FILE__, ": step2 complete");
 }
 #+END_SRC
 
-** 3. _document abstraction, tuple_ (pre-output-processing)       :processing:
+** 3. _document abstraction, tuple_ (output-pre-processing)                      >>
 - [[./meta_abstraction.org][meta_abstraction]]
 
 - prepare the document abstraction used in downstream processing
@@ -778,7 +795,7 @@ debug(steps) {
   writeln(__LINE__, ":", __FILE__, ": step3 commence → (document abstraction (da); da keys; segnames; doc_matters)");
 }
 auto da = SiSUdocAbstraction!()(
-  _header_body_inserts[headBody.body_content],
+  _header_body_insertfilelist_imagelist[headBody.body_content],
   _make_and_meta_struct,
   _opt_action,
 );
@@ -794,7 +811,7 @@ debug(steps) {
 }
 #+END_SRC
 
-** 4. _document matters_ (doc info gathered, various sources)
+** 4. _document matters_ (doc info gathered, various sources)                    >>
 
 - prepare document_matters, miscellany about processing and the document of use
   in downstream processing
@@ -865,7 +882,7 @@ struct DocumentMatters {
     return _manifest.pod_image_dirs;
   }
   auto file_insert_list() {
-    string[] _k = _header_body_inserts[headBody.insert_filelist];
+    string[] _k = _header_body_insertfilelist_imagelist[headBody.insert_file_list];
     return _k;
   }
   auto image_list() {
diff --git a/src/sdp/meta/metadoc.d b/src/sdp/meta/metadoc.d
index 79f9849..e3947e5 100644
--- a/src/sdp/meta/metadoc.d
+++ b/src/sdp/meta/metadoc.d
@@ -27,7 +27,7 @@ template SiSUabstraction() {
   mixin SiSUbiblio;
   mixin SiSUrgxInitFlags;
   mixin outputHub;
-  enum headBody { header, body_content, insert_filelist }
+  enum headBody { header, body_content, insert_file_list, image_list }
   enum makeMeta { make, meta }
   enum docAbst  { doc_abstraction, section_keys, segnames, segnames_0_4, images }
   static auto rgx = Rgx();
@@ -42,26 +42,30 @@ template SiSUabstraction() {
     /+ ↓ read file (filename with path) +/
     /+ ↓ file tuple of header and content +/
     debug(steps) {
-      writeln(__LINE__, ":", __FILE__, ": step1 commence → (get document header & body & insert files)");
+      writeln(__LINE__, ":", __FILE__,
+        ": step1 commence → (get document header & body & insert file list & if needed image list)"
+      );
     }
-    auto _header_body_inserts =
-      SiSUrawMarkupContent!()(_manifest.src_fn);
-    static assert(!isTypeTuple!(_header_body_inserts));
-    static assert(_header_body_inserts.length==3);
+    auto _header_body_insertfilelist_imagelist =
+      SiSUrawMarkupContent!()(_opt_action, _manifest.src_fn);
+    static assert(!isTypeTuple!(_header_body_insertfilelist_imagelist));
+    static assert(_header_body_insertfilelist_imagelist.length==4);
     debug(steps) {
       writeln(__LINE__, ":", __FILE__, ": step1 complete");
     }
     debug(header_and_body) {
       writeln(header);
-      writeln(_header_body_inserts.length);
-      writeln(_header_body_inserts.length[headBody.body_content][0]);
+      writeln(_header_body_insertfilelist_imagelist.length);
+      writeln(_header_body_insertfilelist_imagelist.length[headBody.body_content][0]);
     }
     /+ ↓ split header into make and meta +/
     debug(steps) {
-      writeln(__LINE__, ":", __FILE__, ": step2 commence → (doc header: make & meta as struct)");
+      writeln(__LINE__, ":", __FILE__,
+        ": step2 commence → (doc header: make & meta as struct)"
+       );
     }
     auto _make_and_meta_struct =
-      docHeaderMakeAndMetaTupExtractAndConvertToStruct!()(conf_files_composite_make, _header_body_inserts[headBody.header]); // breakage ...
+      docHeaderMakeAndMetaTupExtractAndConvertToStruct!()(conf_files_composite_make, _header_body_insertfilelist_imagelist[headBody.header]); // breakage ...
     debug(steps) {
       writeln(__LINE__, ":", __FILE__, ": step2 complete");
     }
@@ -70,7 +74,7 @@ template SiSUabstraction() {
       writeln(__LINE__, ":", __FILE__, ": step3 commence → (document abstraction (da); da keys; segnames; doc_matters)");
     }
     auto da = SiSUdocAbstraction!()(
-      _header_body_inserts[headBody.body_content],
+      _header_body_insertfilelist_imagelist[headBody.body_content],
       _make_and_meta_struct,
       _opt_action,
     );
@@ -148,7 +152,7 @@ template SiSUabstraction() {
         return _manifest.pod_image_dirs;
       }
       auto file_insert_list() {
-        string[] _k = _header_body_inserts[headBody.insert_filelist];
+        string[] _k = _header_body_insertfilelist_imagelist[headBody.insert_file_list];
         return _k;
       }
       auto image_list() {
diff --git a/src/sdp/meta/read_source_files.d b/src/sdp/meta/read_source_files.d
index ccda78c..2fce0be 100644
--- a/src/sdp/meta/read_source_files.d
+++ b/src/sdp/meta/read_source_files.d
@@ -14,10 +14,19 @@ static template SiSUrawMarkupContent() {
     std.path;
   mixin SiSUrgxInit;
   static auto rgx = Rgx();
+  string[] _images=[];
+  auto _extract_images(S)(S content_block) {
+    string[] images_;
+    auto _content_block = content_block.to!string;
+    if (auto m = _content_block.matchAll(rgx.image)) {
+      images_ ~= m.captures[1].to!string;
+    }
+    return images_;
+  }
   auto rawsrc = RawMarkupContent();
-  auto SiSUrawMarkupContent(Fn)(Fn fn_src) {
+  auto SiSUrawMarkupContent(O,Fn)(O _opt_action, Fn fn_src) {
     auto _0_header_1_body_content_2_insert_filelist_tuple =
-      rawsrc.sourceContentSplitIntoHeaderAndBody(rawsrc.sourceContent(fn_src), fn_src);
+      rawsrc.sourceContentSplitIntoHeaderAndBody(_opt_action, rawsrc.sourceContent(fn_src), fn_src);
     return _0_header_1_body_content_2_insert_filelist_tuple;
   }
   struct RawMarkupContent {
@@ -27,9 +36,10 @@ static template SiSUrawMarkupContent() {
         raw.markupSourceReadIn(fn_src);
       return source_txt_str;
     }
-    final auto sourceContentSplitIntoHeaderAndBody(in string source_txt_str, in string fn_src="") {
+    final auto sourceContentSplitIntoHeaderAndBody(O)(O _opt_action, in string source_txt_str, in string fn_src="") {
       auto raw = MarkupRawUnit();
       string[] insert_file_list;
+      string[] images_list;
       auto t =
         raw.markupSourceHeaderContentRawLineTupleArray(source_txt_str);
       auto header_raw = t[0];
@@ -37,17 +47,25 @@ static template SiSUrawMarkupContent() {
       if (fn_src.match(rgx.src_fn_master)) { // filename with path needed if master file (.ssm) not otherwise
         auto ins = Inserts();
         auto tu =
-          ins.scan_master_src_for_insert_files_and_import_content(sourcefile_body_content, fn_src);
+          ins.scan_master_src_for_insert_files_and_import_content(_opt_action, sourcefile_body_content, fn_src);
         static assert(!isTypeTuple!(tu));
         sourcefile_body_content = tu[0];
         insert_file_list = tu[1].dup;
+        images_list = tu[2].dup;
+      } else if (_opt_action.source || _opt_action.sisupod) {
+        auto ins = Inserts();
+        auto tu =
+          ins.scan_master_src_for_insert_files_and_import_content(_opt_action, sourcefile_body_content, fn_src);
+        static assert(!isTypeTuple!(tu));
+        images_list = tu[2].dup;
       }
       t = tuple(
         header_raw,
         sourcefile_body_content,
-        insert_file_list
+        insert_file_list,
+        images_list
       );
-      static assert(t.length==3);
+      static assert(t.length==4);
       return t;
     }
   }
@@ -106,6 +124,7 @@ static template SiSUrawMarkupContent() {
     }
     auto markupSourceHeaderContentRawLineTupleArray(in string source_txt_str) {
       string[] file_insert_list = [];
+      string[] images_list = [];
       auto hc = header0Content1(source_txt_str);
       auto header = hc[0];
       char[] source_txt = hc[1];
@@ -113,7 +132,8 @@ static template SiSUrawMarkupContent() {
       auto t = tuple(
         header,
         source_line_arr,
-        file_insert_list
+        file_insert_list,
+        images_list
       );
       return t;
     }
@@ -133,9 +153,10 @@ static template SiSUrawMarkupContent() {
   }
   struct Inserts {
     import sdp.meta.defaults;
-    auto scan_subdoc_source(
+    auto scan_subdoc_source(O)(
+      O        _opt_action,
       char[][] markup_sourcefile_insert_content,
-      string fn_src
+      string   fn_src
     ) {
       mixin SiSUrgxInitFlags;
       char[][] contents_insert;
@@ -198,33 +219,51 @@ static template SiSUrawMarkupContent() {
               markup_sourcesubfile_insert_content.length
             );
           }
+          if (_opt_action.source || _opt_action.sisupod) {
+            _images ~= _extract_images(markup_sourcesubfile_insert_content);
+          }
           auto ins = Inserts();
           /+
-            1. load file,
-            2. read lines;
-            3. scan lines,
-            4. if filename insert, and insert filename
-            5.   repeat 1
-            6. else
-            7.   add line to new array;
+            - 1. load file
+            - 2. read lines
+            - 3. scan lines
+              - a. if filename insert, and insert filename
+                 - repeat 1
+              - b. else
+                 - add line to new array;
+                 - build image list, search for any image files to add to image list
           +/
         } else {
           type1["header_make"] = 0;
           type1["header_meta"] = 0;
-          contents_insert ~= line;
+          contents_insert ~= line; // images to extract for image list?
+          if (_opt_action.source || _opt_action.sisupod) {
+            auto _image_linelist = _extract_images(line);
+            if (_image_linelist.length > 0) {
+              _images ~= _image_linelist;
+            }
+          }
         }
       } // end src subdoc (inserts) loop
-      return contents_insert;
+      auto t = tuple(
+        contents_insert,
+        _images
+      );
+      return t;
     }
-    auto scan_master_src_for_insert_files_and_import_content(
+    auto scan_master_src_for_insert_files_and_import_content(O)(
+      O        _opt_action,
       char[][] sourcefile_body_content,
-      string fn_src
+      string   fn_src
     ) {
+      import std.algorithm;
       mixin SiSUrgxInitFlags;
       char[][] contents;
       auto type = flags_type_init;
       auto fn_pth_full = fn_src.match(rgx.src_pth);
       auto markup_src_file_path = fn_pth_full.captures[1];
+      char[][] contents_insert;
+      string[] _images =[];
       string[] insert_file_list =[];
       foreach (line; sourcefile_body_content) {
         if (type["curly_code"] == 1) {
@@ -266,31 +305,50 @@ static template SiSUrawMarkupContent() {
             );
           }
           auto ins = Inserts();
-          auto contents_insert = ins.scan_subdoc_source(
+          auto contents_insert_tu = ins.scan_subdoc_source(
+            _opt_action,
             markup_sourcefile_insert_content,
             to!string(fn_src_insert)
           );
-          contents ~= contents_insert;
+          contents ~= contents_insert_tu[0]; // images to extract for image list?
+          if (_opt_action.source || _opt_action.sisupod) {
+            auto _image_linelist = _extract_images(contents_insert_tu[0]);
+            if (_image_linelist.length > 0) {
+              _images ~= _image_linelist;
+            }
+          }
           /+
-            1. load file,
-            2. read lines;
-            3. scan lines,
-            4. if filename insert, and insert filename
-            5.   repeat 1
-            6. else
-            7.   add line to new array;
+            - 1. load file
+            - 2. read lines
+            - 3. scan lines
+              - a. if filename insert, and insert filename
+                 - repeat 1
+              - b. else
+                 - add line to new array;
+                 - build image list, search for any image files to add to image list
           +/
         } else {
           contents ~= line;
+          if (_opt_action.source || _opt_action.sisupod) {
+            auto _image_linelist = _extract_images(line);
+            if (_image_linelist.length > 0) {
+              _images ~= _image_linelist;
+            }
+          }
         }
       } // end src doc loop
+      string[] images = [];
+      foreach(i; uniq(_images.sort())) {
+        images ~= i;
+      }
       debug(insert_file) {
         writeln(__LINE__);
         writeln(contents.length);
       }
       auto t = tuple(
         contents,
-        insert_file_list
+        insert_file_list,
+        images
       );
       return t;
     }
diff --git a/src/sdp/sdp.d b/src/sdp/sdp.d
index 30f8d03..f4d738f 100755
--- a/src/sdp/sdp.d
+++ b/src/sdp/sdp.d
@@ -302,19 +302,19 @@ void main(string[] args) {
     "pwd" : environment["PWD"],
     "home" : environment["HOME"],
   ];
-  auto _manifest = PodManifest!()();
-  auto _manifest_plus = PodMatters!()(_opt_action, _env);
-  auto _manifests = [ _manifest_plus ];
+  auto _manifest_start = PodManifest!()();
+  auto _manifest_matter = PodMatters!()(_opt_action, _env);
+  auto _manifests = [ _manifest_matter ];
   foreach(arg; args[1..$]) {
-    _manifest = PodManifest!()(arg);
+    _manifest_start = PodManifest!()(arg);
     if (arg.match(rgx.flag_action)) {
       flag_action ~= " " ~ arg;   // flags not taken by getopt
     } else if (arg.match(rgx.src_pth)) {
       _manifests ~= PodMatters!()(_opt_action, _env, arg, arg); // gather input markup source file names for processing
-    } else if (_manifest.pod_manifest_file_with_path) {
+    } else if (_manifest_start.pod_manifest_file_with_path) {
       string contents_location_raw_;
       string contents_location_;
-      string sisudoc_txt_ = _manifest.pod_manifest_file_with_path;
+      string sisudoc_txt_ = _manifest_start.pod_manifest_file_with_path;
       enforce(
         exists(sisudoc_txt_)!=0,
         "file not found: «" ~
@@ -353,8 +353,8 @@ void main(string[] args) {
           || (contents_location_pth_).match(lang_rgx_)
         ) {
           auto _fns = (((tmp_dir_).chainPath(contents_location_pth_)).array).to!(string);
-          _manifest_plus = PodMatters!()(_opt_action, _env, arg, _fns, contents_locations_arr);
-          _manifests ~= _manifest_plus; // TODO how to capture?
+          _manifest_matter = PodMatters!()(_opt_action, _env, arg, _fns, contents_locations_arr);
+          _manifests ~= _manifest_matter; // TODO how to capture?
         }
       }
     } else if (arg.match(rgx.src_pth_zip)) {
@@ -367,7 +367,7 @@ void main(string[] args) {
   if (!(_opt_action.skip_output)) {
     outputHubOp!()(_opt_action);
   }
-  if (_manifests.length > 1) { // _manifests[0] is dummy element used in initialization to be removed
+  if (_manifests.length > 1) { // _manifests[0] initialized dummy element
     foreach(manifest; _manifests[1..$]) {
       if (!empty(manifest.src_fn)) {
         scope(success) {
diff --git a/views/version.txt b/views/version.txt
index 003d862..12e05c9 100644
--- a/views/version.txt
+++ b/views/version.txt
@@ -4,7 +4,7 @@ struct Version {
   int minor;
   int patch;
 }
-enum ver = Version(0, 22, 0);
+enum ver = Version(0, 23, 0);
 version (Posix) {
   version (DigitalMars) {
   } else version (LDC) {