769b693564
Fixes #698. PrintHelpText now prints to standard output instead of to standard error. The purpose of this CL is to make it easy for users to grep for matches otherwise stderr output has to be awkwardly redirectly to stdout using this shell trick `2>&1`, for example ```shell protoc --help 2>&1 | grep cpp ``` of which we shouldn't be making users have to work that hard just to get use of --help. + Exhibits: * Before: ```shell $ protoc --help | grep cpp Usage: protoc [OPTION] PROTO_FILES Parse PROTO_FILES and generate output based on the options given: -IPATH, --proto_path=PATH Specify the directory in which to search for imports. May be specified multiple times; directories will be searched in order. If not given, the current working directory is used. --version Show version info and exit. -h, --help Show this text and exit. --encode=MESSAGE_TYPE Read a text-format message of the given type from standard input and write it in binary to standard output. The message type must be defined in PROTO_FILES or their imports. --decode=MESSAGE_TYPE Read a binary message of the given type from standard input and write it in text format to standard output. The message type must be defined in PROTO_FILES or their imports. --decode_raw Read an arbitrary protocol message from standard input and write the raw tag/value pairs in text format to standard output. No PROTO_FILES should be given when using this flag. -oFILE, Writes a FileDescriptorSet (a protocol buffer, --descriptor_set_out=FILE defined in descriptor.proto) containing all of the input files to FILE. --include_imports When using --descriptor_set_out, also include all dependencies of the input files in the set, so that the set is self-contained. --include_source_info When using --descriptor_set_out, do not strip SourceCodeInfo from the FileDescriptorProto. This results in vastly larger descriptors that include information about the original location of each decl in the source file as well as surrounding comments. --dependency_out=FILE Write a dependency output file in the format expected by make. This writes the transitive set of input file paths to FILE --error_format=FORMAT Set the format in which to print errors. FORMAT may be 'gcc' (the default) or 'msvs' (Microsoft Visual Studio format). --print_free_field_numbers Print the free field numbers of the messages defined in the given proto files. Groups share the same field number space with the parent message. Extension ranges are counted as occupied fields numbers. --plugin=EXECUTABLE Specifies a plugin executable to use. Normally, protoc searches the PATH for plugins, but you may specify additional executables not in the path using this flag. Additionally, EXECUTABLE may be of the form NAME=PATH, in which case the given plugin name is mapped to the given executable even if the executable's own name differs. --cpp_out=OUT_DIR Generate C++ header and source. --csharp_out=OUT_DIR Generate C# source file. --java_out=OUT_DIR Generate Java source file. --javanano_out=OUT_DIR Generate Java Nano source file. --js_out=OUT_DIR Generate JavaScript source. --objc_out=OUT_DIR Generate Objective C header and source. --python_out=OUT_DIR Generate Python source file. --ruby_out=OUT_DIR Generate Ruby source file. ``` * After: ```shell $ protoc --help | grep cpp --plugin=EXECUTABLE Specifies a plugin executable to use. Normally, protoc searches the PATH for plugins, but you may specify additional executables not in the path using this flag. Additionally, EXECUTABLE may be of the form NAME=PATH, in which case the given plugin name is mapped to the given executable even if the executable's own name differs. --cpp_out=OUT_DIR Generate C++ header and source. --csharp_out=OUT_DIR Generate C# source file. --java_out=OUT_DIR Generate Java source file. --javanano_out=OUT_DIR Generate Java Nano source file. --js_out=OUT_DIR Generate JavaScript source. --objc_out=OUT_DIR Generate Objective C header and source. --python_out=OUT_DIR Generate Python source file. --ruby_out=OUT_DIR Generate Ruby source file. ``` |
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| cmake | ||
| conformance | ||
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| editors | ||
| examples | ||
| java | ||
| javanano | ||
| jenkins | ||
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| m4 | ||
| more_tests | ||
| objectivec | ||
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| protoc-artifacts | ||
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| src | ||
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| util/python | ||
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| appveyor.bat | ||
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| autogen.sh | ||
| BUILD | ||
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| composer.json | ||
| configure.ac | ||
| CONTRIBUTORS.txt | ||
| generate_changelog.py | ||
| generate_descriptor_proto.sh | ||
| gmock.BUILD | ||
| LICENSE | ||
| Makefile.am | ||
| post_process_dist.sh | ||
| protobuf-lite.pc.in | ||
| protobuf.bzl | ||
| protobuf.pc.in | ||
| Protobuf.podspec | ||
| README.md | ||
| six.BUILD | ||
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Protocol Buffers - Google's data interchange format
Copyright 2008 Google Inc.
https://developers.google.com/protocol-buffers/
Overview
Protocol Buffers (a.k.a., protobuf) are Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data. You can find protobuf's documentation on the Google Developers site.
This README file contains protobuf installation instructions. To install protobuf, you need to install the protocol compiler (used to compile .proto files) and the protobuf runtime for your chosen programming language.
Protocol Compiler Installation
The protocol compiler is written in C++. If you are using C++, please follow the C++ Installation Instructions to install protoc along with the C++ runtime.
For non-C++ users, the simplest way to install the protocol compiler is to download a pre-built binary from our release page:
https://github.com/google/protobuf/releases
In the downloads section of each release, you can find pre-built binaries in zip packages: protoc-$VERSION-$PLATFORM.zip. It contains the protoc binary as well as a set of standard .proto files distributed along with protobuf.
If you are looking for an old version that is not available in the release page, check out the maven repo here:
http://repo1.maven.org/maven2/com/google/protobuf/protoc/
These pre-built binaries are only provided for released versions. If you want to use the github master version at HEAD, or you need to modify protobuf code, or you are using C++, it's recommended to build your own protoc binary from source.
If you would like to build protoc binary from source, see the C++ Installation Instructions.
Protobuf Runtime Installation
Protobuf supports several different programming languages. For each programming language, you can find instructions in the corresponding source directory about how to install protobuf runtime for that specific language:
| Language | Source |
|---|---|
| C++ (include C++ runtime and protoc) | src |
| Java | java |
| Python | python |
| Objective-C | objectivec |
| C# | csharp |
| JavaNano | javanano |
| JavaScript | js |
| Ruby | ruby |
| Go | golang/protobuf |
| PHP | php |
Usage
The complete documentation for Protocol Buffers is available via the web at: