diff options
| -rw-r--r-- | src/google/protobuf/compiler/command_line_interface.cc | 6 | ||||
| -rw-r--r-- | src/google/protobuf/compiler/command_line_interface_unittest.cc | 6 |
2 files changed, 10 insertions, 2 deletions
diff --git a/src/google/protobuf/compiler/command_line_interface.cc b/src/google/protobuf/compiler/command_line_interface.cc index 3629f682..3eba3486 100644 --- a/src/google/protobuf/compiler/command_line_interface.cc +++ b/src/google/protobuf/compiler/command_line_interface.cc @@ -439,7 +439,11 @@ bool CommandLineInterface::MakeInputsBeProtoPathRelative( } else { cerr << input_files_[i] << ": File does not reside within any path " "specified using --proto_path (or -I). You must specify a " - "--proto_path which encompasses this file." << endl; + "--proto_path which encompasses this file. Note that the " + "proto_path must be an exact prefix of the .proto file " + "names -- protoc is too dumb to figure out when two paths " + "(e.g. absolute and relative) are equivalent (it's harder " + "than you think)." << endl; } return false; } diff --git a/src/google/protobuf/compiler/command_line_interface_unittest.cc b/src/google/protobuf/compiler/command_line_interface_unittest.cc index 0784e781..9da41c02 100644 --- a/src/google/protobuf/compiler/command_line_interface_unittest.cc +++ b/src/google/protobuf/compiler/command_line_interface_unittest.cc @@ -882,7 +882,11 @@ TEST_F(CommandLineInterfaceTest, CwdRelativeInputNotMappedError) { ExpectErrorText( "$tmpdir/foo.proto: File does not reside within any path " "specified using --proto_path (or -I). You must specify a " - "--proto_path which encompasses this file.\n"); + "--proto_path which encompasses this file. Note that the " + "proto_path must be an exact prefix of the .proto file " + "names -- protoc is too dumb to figure out when two paths " + "(e.g. absolute and relative) are equivalent (it's harder " + "than you think).\n"); } TEST_F(CommandLineInterfaceTest, CwdRelativeInputNotFoundAndNotMappedError) { |