From 8dc0e9d30a3d0aa1de7884cbf69850d37e1c42ed Mon Sep 17 00:00:00 2001
From: Joan Josep Ordinas Rosa <jordinas@gmail.com>
Date: Wed, 5 Apr 2017 13:17:46 +0200
Subject: [PATCH] Exploring introspection

---
 docs/Makefile               | 16 ++++-----
 docs/make.d/introspect.make | 66 +++++++++++++++++++++++++++++++++++++
 docs/make.d/metadata.make   | 10 +++---
 3 files changed, 79 insertions(+), 13 deletions(-)
 create mode 100644 docs/make.d/introspect.make

diff --git a/docs/Makefile b/docs/Makefile
index b017715..9509282 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -3,7 +3,7 @@
 include make.d/config.make
 
 ########################################################################
-# Globals
+# Globals and setup
 ########################################################################
 
 # Metadata directory
@@ -22,15 +22,20 @@ Metadata := .yummy
 #    Layouts
 #    Styles
 
-# While clobbering don't introspect
+# If not clobbering
 #ifeq (,$(filter clobber,$(MAKECMDGOALS)))
 ifneq (clobber,$(MAKECMDGOALS))
 
-# Include metadata
+# Define targets for basic metadata
 include make.d/metadata.make
 
+# Build metadata from introspection
+ifdef __globals__
+include make.d/introspect.make
 endif
 
+endif	# not clobbering
+
 ########################################################################
 # jqt command with options
 ########################################################################
@@ -131,11 +136,6 @@ ifdef __globals__
 all: $(Targets) static
 	@echo 1>&2 'Imprimatur!'
 
-# Destination directory
-$(Destination):
-	$(info ==> $@)
-	@mkdir $@ >/dev/null 2>&1 || true
-
 # Copy assets
 static: | $(Destination)
 	@cp --verbose --recursive --update $(Assets)/* $(Destination) \
diff --git a/docs/make.d/introspect.make b/docs/make.d/introspect.make
new file mode 100644
index 0000000..9c01a1e
--- /dev/null
+++ b/docs/make.d/introspect.make
@@ -0,0 +1,66 @@
+########################################################################
+# Introspect filesystem and files's front-matter to build metadata
+########################################################################
+
+# Imported variables:
+#	Metadata
+#	Content
+#	Destination
+
+# Destination directory
+$(Destination):
+	$(info ==> $@)
+	@mkdir $@ >/dev/null 2>&1 || true
+
+# Markdown document found in the filesystem (only .md extensions)
+_documents := $(shell find $(Content) -type f -a -name '*.md')
+
+# Pages to be generated, and related JSON
+define fsys_pages =
+  $(patsubst %.md,%.$1,$(patsubst $(Content)%,$2%,$(_documents)))
+endef
+
+PagesHTML := $(call fsys_pages,html,$(Destination))
+PagesJSON := $(call fsys_pages,json,$(Metadata)/pages)
+
+# Tree structure of directories
+fsys_tree_docs := $(sort $(dir $(_documents)))
+
+define fsys_tree =
+  $(patsubst $(Content)%,$1%,$(fsys_tree_docs))
+endef
+
+fsys_tree_site := $(call fsys_tree,$(Destination))
+fsys_tree_page := $(call fsys_tree,$(Metadata)/pages)
+fsys_tree_node := $(call fsys_tree,$(Metadata)/nodes)
+
+# All sections and subsections, removing home page node
+define fsys_derived_nodes =
+  $(call rest,$(patsubst %/,%$1,$2))
+endef
+
+NodesJSON := $(call fsys_derived_nodes,.json,$(fsys_tree_node))
+NodesHTML := $(call fsys_derived_nodes,/index.html,$(fsys_tree_site))
+
+# Make directories
+$(fsys_tree_site): $(Destination)/% : $(Content)/%
+	@mkdir $@ >/dev/null 2>&1 || true
+$(fsys_tree_page): $(Metadata)/pages/% : $(Content)/%
+	@mkdir $@ >/dev/null 2>&1 || true
+$(fsys_tree_node): $(Metadata)/nodes/% : $(Content)/%
+	@mkdir $@ >/dev/null 2>&1 || true
+
+#########################################################################
+# Test
+intro:
+	@echo '_documents: $(_documents)'
+	@echo 'PagesHTML: $(PagesHTML)'
+	@echo 'PagesJSON: $(PagesJSON)'
+	@echo 'fsys_tree_docs: $(fsys_tree_docs)'
+	@echo 'fsys_tree_site: $(fsys_tree_site)'
+	@echo 'fsys_tree_page: $(fsys_tree_page)'
+	@echo 'fsys_tree_node: $(fsys_tree_node)'
+	@echo 'NodesJSON: $(NodesJSON)'
+	@echo 'NodesHTML: $(NodesHTML)'
+
+# vim:ai:sw=8:ts=8:noet:fileencoding=utf8:syntax=make
diff --git a/docs/make.d/metadata.make b/docs/make.d/metadata.make
index b6ae52e..2fdccd1 100644
--- a/docs/make.d/metadata.make
+++ b/docs/make.d/metadata.make
@@ -5,6 +5,11 @@
 # Imported variables:
 #	Metadata
 
+# Metadata directory
+$(Metadata):
+	$(info ==> $@)
+	@mkdir $@ >/dev/null 2>&1 || true
+
 # Build all metadata files
 .PHONY: metadata
 metadata:				\
@@ -12,11 +17,6 @@ metadata:				\
 	$(Metadata)/globals.make
 	@:
 
-# Metadata directory
-$(Metadata):
-	$(info ==> $@)
-	@mkdir $@ >/dev/null 2>&1 || true
-
 #
 # Configuration files
 #