vet: add check to ensure terminating newline (grpc#7645)

Author: eshitachandwani

Documentation/grpc-metadata.md

@@ -241,4 +241,4 @@ available [here](../examples/features/metadata_interceptor/server/main.go).
 [Header]: https://godoc.org/google.golang.org/grpc#Header
 [Trailer]: https://godoc.org/google.golang.org/grpc#Trailer
 [CallOption]: https://godoc.org/google.golang.org/grpc#CallOption
-[metadata]: https://godoc.org/google.golang.org/grpc/metadata
+[metadata]: https://godoc.org/google.golang.org/grpc/metadata

examples/data/rbac/policy.json

@@ -27,4 +27,4 @@
     }
   ],
   "deny_rules": []
-}
+}

examples/features/name_resolving/README.md

@@ -38,4 +38,4 @@ proper name resolver, this would fail. In the example it picks the `example`
 resolver that we installed. The `example` resolver can handle
 `resolver.example.grpc.io` correctly by returning the backend address. So even
 though the backend IP is not set when ClientConn is created, the connection will
-be created to the correct backend.
+be created to the correct backend.

reflection/test/grpc_testing_not_regenerate/dynamic.proto

@@ -30,4 +30,4 @@ message DynamicReq {}
 service DynamicService {
   // DynamicMessage1 is a test RPC for dynamically constructed protobufs.
   rpc DynamicMessage1(DynamicReq) returns (DynamicRes);
-}
+}

scripts/vet.sh

@@ -70,6 +70,9 @@ not git grep "\(import \|^\s*\)\"google.golang.org/grpc/interop/grpc_testing" --
 # - Ensure that no trailing spaces are found.
 not git grep '[[:blank:]]$'
 
+# - Ensure that all files have a terminating newline.
+git ls-files | not xargs -I {} sh -c '[ -n "$(tail -c 1 "{}" 2>/dev/null)" ] && echo "{}: No terminating new line found"' | fail_on_output
+
 # - Ensure that no tabs are found in markdown files.
 not git grep $'\t' -- '*.md'
 

testdata/x509/client_with_spiffe_openssl.cnf

@@ -14,4 +14,4 @@ extendedKeyUsage        = critical,clientAuth
 subjectAltName = @alt_names
 
 [alt_names]
-URI = spiffe://foo.bar.com/client/workload/1
+URI = spiffe://foo.bar.com/client/workload/1