Add target to mithril common makefile that check its powerset of feat…

…ures

mithril-common/Makefile

@@ -1,6 +1,11 @@
-.PHONY: all build test check debug run help doc
+.PHONY: all build test check doc check-all-features-set
 
 CARGO = cargo
+# All the crates features excluding the two that have little to no impact to the code
+FEATURES := $(shell ${CARGO} metadata --quiet --no-deps \
+	| jq -r '.packages[] | select(.name=="mithril-common") | .features \
+	  | del(.allow_skip_signer_certification) | del(.portable) \
+	  | keys | join(" ")')
 
 all: test build
 
@@ -18,3 +23,16 @@ check:
 
 doc:
 	${CARGO} doc --no-deps --open --features full
+
+check-all-features-set:
+	# Compute the powerset of all the given features and save it to a temporary file
+	powerset() { [ $$# -eq 0 ] && echo || (shift; powerset "$$@") | while read r ; do echo "$$1 $$r"; echo "$$r"; done };\
+	powerset $$(echo "$(FEATURES)") > .features-sets
+
+	# Read the file to run cargo clippy on all those features sets
+	cat .features-sets | while read features_set; do \
+		echo "Clippy common with feature '$$features_set''"; \
+		${CARGO} clippy -p mithril-common --features "$$features_set"; \
+	done
+
+	rm .features-sets