new Make target: show-deps

README.md

@@ -10,6 +10,12 @@ GNU Make, Bash and the usual POSIX utilities.
 
 `make USE_SYSTEM_NIM=1 test`
 
+## Make targets
+
+### show-deps
+
+Lists all Git submodule URLs, including nested ones.
+
 ## License
 
 Licensed and distributed under either of

makefiles/targets.mk

@@ -146,6 +146,12 @@ ctags:
 	--exclude=$(REPOS_DIR)/nim-bncurve/tests/tvectors.nim \
 	.
 
+# list all Git submodule URLs, including the nested ones
+show-deps:
+	{ git config --file .gitmodules --get-regexp url | cat ;\
+		git submodule foreach --quiet --recursive '[[ -f .gitmodules ]] && git config --file .gitmodules --get-regexp url | cat || true'; } \
+		| cut -d ' ' -f 2 | sort -u
+
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