Add support for additional Cargo workspaces

This is how I work around rust-lang/cargo#5042
to get path dependencies into vendored Rust dependencies.

The generated BUILD files are built with
google#524, because otherwise they
don't work.

This fixes google#361.

WORKSPACE.bazel

@@ -14,7 +14,7 @@ examples_repository()
 
 load("@cargo_raze_examples//:repositories.bzl", examples_repositories = "repositories")
 
-examples_repositories()
+examples_repositories(local_path_prefix = "examples/")
 
 load("@rules_rust//tools/rust_analyzer:deps.bzl", "rust_analyzer_deps")
 

examples/remote/binary_dependencies/cargo/crates.bzl

@@ -167,7 +167,7 @@ def _flatten_dependency_maps(all_dependency_maps):
 
     return dependencies
 
-def remote_binary_dependencies_fetch_remote_crates():
+def remote_binary_dependencies_fetch_remote_crates(local_path_prefix = ""):
     """This function defines a collection of repos and should be called in a WORKSPACE file"""
     maybe(
         http_archive,

examples/remote/build_dependencies/cargo/crates.bzl

@@ -9,7 +9,7 @@ load("@bazel_tools//tools/build_defs/repo:git.bzl", "new_git_repository")  # bui
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")  # buildifier: disable=load
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")  # buildifier: disable=load
 
-def remote_build_dependencies_fetch_remote_crates():
+def remote_build_dependencies_fetch_remote_crates(local_path_prefix = ""):
     """This function defines a collection of repos and should be called in a WORKSPACE file"""
     maybe(
         http_archive,

examples/remote/cargo_workspace/cargo/crates.bzl

@@ -185,7 +185,7 @@ def _flatten_dependency_maps(all_dependency_maps):
 
     return dependencies
 
-def remote_cargo_workspace_fetch_remote_crates():
+def remote_cargo_workspace_fetch_remote_crates(local_path_prefix = ""):
     """This function defines a collection of repos and should be called in a WORKSPACE file"""
     maybe(
         http_archive,

examples/remote/complicated_cargo_library/cargo/crates.bzl

@@ -9,7 +9,7 @@ load("@bazel_tools//tools/build_defs/repo:git.bzl", "new_git_repository")  # bui
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")  # buildifier: disable=load
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")  # buildifier: disable=load
 
-def remote_complicated_cargo_library_fetch_remote_crates():
+def remote_complicated_cargo_library_fetch_remote_crates(local_path_prefix = ""):
     """This function defines a collection of repos and should be called in a WORKSPACE file"""
     maybe(
         http_archive,

examples/remote/dev_dependencies/cargo/crates.bzl

@@ -9,7 +9,7 @@ load("@bazel_tools//tools/build_defs/repo:git.bzl", "new_git_repository")  # bui
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")  # buildifier: disable=load
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")  # buildifier: disable=load
 
-def remote_dev_dependencies_fetch_remote_crates():
+def remote_dev_dependencies_fetch_remote_crates(local_path_prefix = ""):
     """This function defines a collection of repos and should be called in a WORKSPACE file"""
     maybe(
         http_archive,

examples/remote/no_deps/cargo/crates.bzl

@@ -9,6 +9,6 @@ load("@bazel_tools//tools/build_defs/repo:git.bzl", "new_git_repository")  # bui
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")  # buildifier: disable=load
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")  # buildifier: disable=load
 
-def remote_no_deps_fetch_remote_crates():
+def remote_no_deps_fetch_remote_crates(local_path_prefix = ""):
     """No crates were detected in the source Cargo.toml. This is a no-op"""
     pass

examples/remote/non_cratesio/cargo/crates.bzl

@@ -9,7 +9,7 @@ load("@bazel_tools//tools/build_defs/repo:git.bzl", "new_git_repository")  # bui
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")  # buildifier: disable=load
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")  # buildifier: disable=load
 
-def remote_non_cratesio_fetch_remote_crates():
+def remote_non_cratesio_fetch_remote_crates(local_path_prefix = ""):
     """This function defines a collection of repos and should be called in a WORKSPACE file"""
     maybe(
         http_archive,

examples/remote/parent_directory_workspace/cargo/BUILD.bazel

@@ -0,0 +1,24 @@
+"""
+@generated
+cargo-raze generated Bazel file.
+
+DO NOT EDIT! Replaced on runs of cargo-raze
+"""
+
+# Export file for Stardoc support
+exports_files(
+    glob([
+        "**/*.bazel",
+        "**/*.bzl",
+    ]),
+    visibility = ["//visibility:public"],
+)
+
+filegroup(
+    name = "srcs",
+    srcs = glob([
+        "**/*.bazel",
+        "**/*.bzl",
+    ]),
+    visibility = ["//visibility:public"],
+)