Use patched protobuf with RUSTSEC-2019-0003 fix. (#7770)

A crates index patch was needed here to ensure both our crates and
transitive dependent crates saw the same rust-protobuf. Without this we
hit many errors like:
```
   Compiling bazel_protos v0.0.1 (/home/jsirois/dev/pantsbuild/jsirois-pants/src/rust/engine/process_execution/bazel_protos)
error[E0277]: the trait bound `gen::bytestream::ReadRequest: protobuf::core::Message` is not satisfied
  --> process_execution/bazel_protos/src/gen/bytestream_grpc.rs:23:42
   |
23 |     req_mar: ::grpcio::Marshaller { ser: ::grpcio::pb_ser, de: ::grpcio::pb_de },
   |                                          ^^^^^^^^^^^^^^^^ the trait `protobuf::core::Message` is not implemented for `gen::bytestream::ReadRequest`
   |
   = note: required by `grpcio::codec::pb_codec::ser`
```

Fixes #7760

src/rust/engine/Cargo.toml

@@ -103,3 +103,8 @@ tempfile = "3"
 ui = { path = "ui" }
 url = "1.7.1"
 tar_api = { path = "tar_api" }
+
+[patch.crates-io]
+# TODO: Remove patch when we can upgrade to an official released version of protobuf with a fix.
+# See: https://github.com/pantsbuild/pants/issues/7760 for context.
+protobuf = { git="https://github.com/pantsbuild/rust-protobuf", rev="171611c33ec92f07e1b7107327f6d0139a7afebf", version="2.0.6", features = ["with-bytes"] }

src/rust/engine/fs/Cargo.toml

@@ -24,7 +24,7 @@ lazy_static = "1"
 lmdb = { git = "https://github.com/pantsbuild/lmdb-rs.git", rev = "06bdfbfc6348f6804127176e561843f214fc17f8" }
 log = "0.4"
 parking_lot = "0.6"
-protobuf = { version = "2.0.4", features = ["with-bytes"] }
+protobuf = { version = "2.0.6", features = ["with-bytes"] }
 serverset = { path = "../serverset" }
 sha2 = "0.8"
 serde = "1.0"

src/rust/engine/fs/brfs/Cargo.toml

@@ -20,7 +20,7 @@ hashing = { path = "../../hashing" }
 libc = "0.2.39"
 log = "0.4.1"
 parking_lot = "0.6"
-protobuf = { version = "2.0.4", features = ["with-bytes"] }
+protobuf = { version = "2.0.6", features = ["with-bytes"] }
 serverset = { path = "../../serverset" }
 time = "0.1.39"
 tokio = "0.1"

src/rust/engine/fs/fs_util/Cargo.toml

@@ -16,7 +16,7 @@ futures = "^0.1.16"
 futures-timer = { git = "https://github.com/pantsbuild/futures-timer", rev = "0b747e565309a58537807ab43c674d8951f9e5a0" }
 hashing = { path = "../../hashing" }
 parking_lot = "0.6"
-protobuf = { version = "2.0.4", features = ["with-bytes"] }
+protobuf = { version = "2.0.6", features = ["with-bytes"] }
 rand = "0.6"
 serde = "1.0"
 serde_json = "1.0"

src/rust/engine/process_execution/Cargo.toml

@@ -16,7 +16,7 @@ futures = "^0.1.16"
 grpcio = { git = "https://github.com/pantsbuild/grpc-rs.git", rev = "4dfafe9355dc996d7d0702e7386a6fedcd9734c0", default_features = false, features = ["protobuf-codec", "secure"] }
 hashing = { path = "../hashing" }
 log = "0.4"
-protobuf = { version = "2.0.4", features = ["with-bytes"] }
+protobuf = { version = "2.0.6", features = ["with-bytes"] }
 resettable = { path = "../resettable" }
 sha2 = "0.8"
 tempfile = "3"

src/rust/engine/process_execution/bazel_protos/Cargo.toml

@@ -13,7 +13,7 @@ hashing = { path = "../../hashing" }
 prost = "0.4"
 prost-derive = "0.4"
 prost-types = "0.4"
-protobuf = { version = "2.0.4", features = ["with-bytes"] }
+protobuf = { version = "2.0.6", features = ["with-bytes"] }
 # Waiting for https://github.com/tower-rs/tower-grpc/pull/108 and a first actual release.
 tower-grpc = { git = "https://github.com/pantsbuild/tower-grpc.git", rev = "ef19f2e1715f415ecb699e8f17f5845ad2b45daf", features = ["prost"] }
 

src/rust/engine/testutil/Cargo.toml

@@ -10,5 +10,5 @@ bazel_protos = { path = "../process_execution/bazel_protos" }
 bytes = "0.4.5"
 digest = "0.8"
 hashing = { path = "../hashing" }
-protobuf = { version = "2.0.4", features = ["with-bytes"] }
+protobuf = { version = "2.0.6", features = ["with-bytes"] }
 sha2 = "0.8"

src/rust/engine/testutil/mock/Cargo.toml

@@ -12,5 +12,5 @@ futures = "^0.1.16"
 grpcio = { git = "https://github.com/pantsbuild/grpc-rs.git", rev = "4dfafe9355dc996d7d0702e7386a6fedcd9734c0", default_features = false, features = ["protobuf-codec", "secure"] }
 hashing = { path = "../../hashing" }
 parking_lot = "0.6"
-protobuf = { version = "2.0.4", features = ["with-bytes"] }
+protobuf = { version = "2.0.6", features = ["with-bytes"] }
 testutil = { path = ".." }