Move root of Rust crate into repo root

This enables IDE integration to work (which requires the Cargo.toml to
be in the repo root).

"make clean" no longer runs "cargo clean", because IDE integrations hold
locks on files within the Rust build directory, and an error inside
"cargo clean" error would prevent "make clean" from completing (and
removing other files).

.gitignore

@@ -73,9 +73,9 @@ src/univalue/gen
 Makefile
 
 # Rust
-src/.cargo/.configured-for-*
-src/.cargo/config
-src/rust/target
+.cargo/.configured-for-*
+.cargo/config
+target/
 
 # Unit-tests
 Makefile.test

Cargo.toml

@@ -16,7 +16,7 @@ edition = "2018"
 
 [lib]
 name = "rustzcash"
-path = "src/rustzcash.rs"
+path = "src/rust/src/rustzcash.rs"
 crate-type = ["staticlib"]
 
 [dependencies]

src/Makefile.am

@@ -39,9 +39,9 @@ LIBBITCOIN_CLI=libbitcoin_cli.a
 LIBBITCOIN_UTIL=libbitcoin_util.a
 LIBBITCOIN_CRYPTO=crypto/libbitcoin_crypto.a
 if TARGET_WINDOWS
-LIBRUSTZCASH=rust/target/$(RUST_TARGET)/release/rustzcash.lib
+LIBRUSTZCASH=$(top_builddir)/target/$(RUST_TARGET)/release/rustzcash.lib
 else
-LIBRUSTZCASH=rust/target/$(RUST_TARGET)/release/librustzcash.a
+LIBRUSTZCASH=$(top_builddir)/target/$(RUST_TARGET)/release/librustzcash.a
 endif
 LIBSECP256K1=secp256k1/libsecp256k1.la
 LIBUNIVALUE=univalue/libunivalue.la
@@ -65,25 +65,25 @@ RUST_BUILD_OPTS = --release --target $(RUST_TARGET)
 
 if ENABLE_ONLINE_RUST
 # Ensure that .cargo/config does not exist
-CARGO_CONFIGURED = .cargo/.configured-for-online
+CARGO_CONFIGURED = $(top_srcdir)/.cargo/.configured-for-online
 $(CARGO_CONFIGURED):
-	$(AM_V_at)rm -f .cargo/.configured-for-offline .cargo/config
+	$(AM_V_at)rm -f $(top_srcdir)/.cargo/.configured-for-offline $(top_srcdir)/.cargo/config
 	$(AM_V_at)touch $@
 
 else
 # Enable dependency vendoring
 RUST_BUILD_OPTS += --locked --offline
 
-CARGO_CONFIGURED = .cargo/.configured-for-offline
-$(CARGO_CONFIGURED): .cargo/config.offline
-	$(AM_V_at)rm -f .cargo/.configured-for-online
-	$(AM_V_at)cp $< .cargo/config
-	$(AM_V_at)echo "directory = \"$(RUST_VENDORED_SOURCES)\"" >>.cargo/config
+CARGO_CONFIGURED = $(top_srcdir)/.cargo/.configured-for-offline
+$(CARGO_CONFIGURED): $(top_srcdir)/.cargo/config.offline
+	$(AM_V_at)rm -f $(top_srcdir)/.cargo/.configured-for-online
+	$(AM_V_at)cp $< $(top_srcdir)/.cargo/config
+	$(AM_V_at)echo "directory = \"$(RUST_VENDORED_SOURCES)\"" >>$(top_srcdir)/.cargo/config
 	$(AM_V_at)touch $@
 endif
 
 cargo-build: $(CARGO_CONFIGURED)
-	$(RUST_ENV_VARS) $(CARGO) build $(RUST_BUILD_OPTS) --manifest-path $(srcdir)/rust/Cargo.toml
+	$(RUST_ENV_VARS) $(CARGO) build $(RUST_BUILD_OPTS) --manifest-path $(top_srcdir)/Cargo.toml
 
 $(LIBRUSTZCASH): cargo-build
 
@@ -603,7 +603,6 @@ DISTCLEANFILES = obj/build.h
 EXTRA_DIST = leveldb
 
 clean-local:
-	$(CARGO) clean --manifest-path $(srcdir)/rust/Cargo.toml
 	rm -f .cargo/config .cargo/.configured-for-online .cargo/.configured-for-offline
 	-$(MAKE) -C leveldb clean
 	-$(MAKE) -C secp256k1 clean