git subrepo clone --branch=0.2.5 https://github.com/yaml/libyaml.git deps/libyaml

subrepo:
  subdir:   "deps/libyaml"
  merged:   "2c891fc"
upstream:
  origin:   "https://github.com/yaml/libyaml.git"
  branch:   "0.2.5"
  commit:   "2c891fc"
git-subrepo:
  version:  "0.4.6"
  origin:   "???"
  commit:   "???"

deps/libyaml/.makefile

@@ -0,0 +1,63 @@
+# This file is used for common development targets that can be done with
+# needing the cumbersome bootstrapping process.
+#
+# You can use it like this:
+#
+#   make -f .makefile indent
+#
+# If you copy or link this file to `GNUmakefile` then you can just do:
+#
+#   make indent
+#
+# When copied to `GNUmakefile`, this file is can also be used for bootstrapping
+# Makefile targets. Since GNUmakefile is loaded before Makefile, we do the
+# bootstrapping tasks need to get a Makefile first, then we use the Makefile to
+# make our target.
+
+# Remind user when they are using GNUmakefile:
+ifeq ($(lastword $(MAKEFILE_LIST)),GNUmakefile)
+    $(info *** NOTE: GNUmakefile in use. ***)
+endif
+
+MAKE_TARGETS := \
+	all \
+	all-am \
+	all-recursive \
+	install \
+	test \
+	test-all \
+	test-suite \
+
+# SOURCE_FILES := $(shell find . | grep '\.c$$')
+SOURCE_FILES := $(shell find tests/run-test-suite | grep '\.c$$')
+ifneq ($(shell which gindent),)
+INDENT := gindent
+else
+INDENT := indent
+endif
+
+#
+# Proxy make targets:
+#
+default: all
+
+# Proxy these targets to the real Makefile, after bootstrapping is necessary.
+$(MAKE_TARGETS): Makefile
+	@make -f $< $@
+
+Makefile: Makefile.in
+	./configure
+
+Makefile.in:
+	./bootstrap
+
+#
+# Development make targets:
+#
+indent:
+	$(INDENT) $(SOURCE_FILES)
+
+distclean purge:
+	git clean -dxf -e GNUmakefile
+	rm -fr tests/run-test-suite
+	git worktree prune