meta: Add Makefile

When developing Butane/Ignition files, I frequently forget to update the
parent files after making a change to an included file.  This causes a
lot of wasted time re-provisioning, only to discover that my change
did not take effect.  To alleviate this, we'll use `make` with some
macro magic to scan the Butane files for their dependencies, and let it
generate whatever Ignition files need updating any time a dependant file
changes.

I've also added a "publish" step to the Makefile, since I also
frequently forget to upload the regenerated Ignition files to the
server, causing the same headaches.

Makefile

@@ -0,0 +1,22 @@
+.PHONY: \
+	all \
+	clean \
+	publish
+
+.DEFAULT_GOAL := all
+
+clean:
+	rm -f *.ign
+
+define genrules
+$(patsubst %.yaml,%.ign,$(1)): $(1) $$(shell sed -rn 's/.*local: (.*)/\1/p' $(1))
+	butane -d . $$< > $$@
+
+all: $(patsubst %.yaml,%.ign,$(1))
+endef
+
+$(foreach t,$(wildcard *.yaml),$(eval $(call genrules,$(t))))
+
+publish: \
+		nvr1.ign
+	rsync -rti $^ files.pyrocufflink.blue:public_html/

butane-watch.sh

@@ -2,8 +2,9 @@
 # vim: set sw=4 ts=4 sts=4 et :
 
 inotifywait -e CLOSE_WRITE -m . \
-    | stdbuf -o 0 grep -F .yaml \
+    | stdbuf -o 0 grep -v .ign \
     | while read _ _ f; do
-        printf 'Regenerating %s from %s ...\n' "${f%.yaml}.ign" "${f}"
-        butane -d . ${f} > ${f%.yaml}.ign
+        [ -f "${f}" ] || continue
+        printf '%s changed, running make ...\n' "${f}"
+        make && make publish
     done