Embed git revision in CLI version output.

Makefile

@@ -11,6 +11,9 @@ CARGO = cargo +nightly
 # Uncomment this if the above is uncommented
 #TARGET_PRFX = --target=
 
+# Git revision, embedded in src/lib.rs
+GIT_REV = $(shell git rev-parse --short HEAD)
+
 # Binaries to be built
 BINS = darkfid faucetd drk darkirc vanityaddr tau taud
 
@@ -35,7 +38,10 @@ BINDEPS = \
 
 all: $(BINS)
 
-zkas: $(ZKASDEPS)
+rev:
+	@grep -q "$(GIT_REV)" src/lib.rs || sed -e 's/@GIT_REV@/$(GIT_REV)/' -i src/lib.rs
+
+zkas: rev $(ZKASDEPS)
 	$(CARGO) build $(TARGET_PRFX)$(RUST_TARGET) --all-features --release --package $@
 	cp -f target/$(RUST_TARGET)/release/$@ $@
 
@@ -101,5 +107,5 @@ uninstall:
 		rm -f $(DESTDIR)$(PREFIX)/bin/$$i; \
 	done;
 
-.PHONY: all check fix fmt clippy test test-no-run cleanbin clean \
+.PHONY: all rev check fix fmt clippy test test-no-run cleanbin clean \
 	install uninstall contracts coverage

src/lib.rs

@@ -69,9 +69,10 @@ pub const ANSI_LOGO: &str = include_str!("../contrib/darkfi.ansi");
 macro_rules! cli_desc {
     () => {{
         let desc = format!(
-            "{} {}\n{}\n{}",
+            "{} {}-{}\n{}\n{}",
             env!("CARGO_PKG_NAME").to_string(),
             env!("CARGO_PKG_VERSION").to_string(),
+            "@GIT_REV@", // Only noobs will change this
             env!("CARGO_PKG_DESCRIPTION").to_string(),
             darkfi::ANSI_LOGO,
         );