diff options
Diffstat (limited to 'CAN-binder/libs/nanopb/tests/site_scons/site_tools')
-rw-r--r-- | CAN-binder/libs/nanopb/tests/site_scons/site_tools/nanopb.py | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/CAN-binder/libs/nanopb/tests/site_scons/site_tools/nanopb.py b/CAN-binder/libs/nanopb/tests/site_scons/site_tools/nanopb.py new file mode 100644 index 00000000..c72a45d3 --- /dev/null +++ b/CAN-binder/libs/nanopb/tests/site_scons/site_tools/nanopb.py @@ -0,0 +1,126 @@ +''' +Scons Builder for nanopb .proto definitions. + +This tool will locate the nanopb generator and use it to generate .pb.c and +.pb.h files from the .proto files. + +Basic example +------------- +# Build myproto.pb.c and myproto.pb.h from myproto.proto +myproto = env.NanopbProto("myproto") + +# Link nanopb core to the program +env.Append(CPPPATH = "$NANOB") +myprog = env.Program(["myprog.c", myproto, "$NANOPB/pb_encode.c", "$NANOPB/pb_decode.c"]) + +Configuration options +--------------------- +Normally, this script is used in the test environment of nanopb and it locates +the nanopb generator by a relative path. If this script is used in another +application, the path to nanopb root directory has to be defined: + +env.SetDefault(NANOPB = "path/to/nanopb") + +Additionally, the path to protoc and the options to give to protoc can be +defined manually: + +env.SetDefault(PROTOC = "path/to/protoc") +env.SetDefault(PROTOCFLAGS = "--plugin=protoc-gen-nanopb=path/to/protoc-gen-nanopb") +''' + +import SCons.Action +import SCons.Builder +import SCons.Util +import os.path + +class NanopbWarning(SCons.Warnings.Warning): + pass +SCons.Warnings.enableWarningClass(NanopbWarning) + +def _detect_nanopb(env): + '''Find the path to nanopb root directory.''' + if env.has_key('NANOPB'): + # Use nanopb dir given by user + return env['NANOPB'] + + p = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..', '..')) + if os.path.isdir(p) and os.path.isfile(os.path.join(p, 'pb.h')): + # Assume we are running under tests/site_scons/site_tools + return p + + raise SCons.Errors.StopError(NanopbWarning, + "Could not find the nanopb root directory") + +def _detect_protoc(env): + '''Find the path to the protoc compiler.''' + if env.has_key('PROTOC'): + # Use protoc defined by user + return env['PROTOC'] + + n = _detect_nanopb(env) + p1 = os.path.join(n, 'generator-bin', 'protoc' + env['PROGSUFFIX']) + if os.path.exists(p1): + # Use protoc bundled with binary package + return env['ESCAPE'](p1) + + p = env.WhereIs('protoc') + if p: + # Use protoc from path + return env['ESCAPE'](p) + + raise SCons.Errors.StopError(NanopbWarning, + "Could not find the protoc compiler") + +def _detect_protocflags(env): + '''Find the options to use for protoc.''' + if env.has_key('PROTOCFLAGS'): + return env['PROTOCFLAGS'] + + p = _detect_protoc(env) + n = _detect_nanopb(env) + p1 = os.path.join(n, 'generator-bin', 'protoc' + env['PROGSUFFIX']) + if p == env['ESCAPE'](p1): + # Using the bundled protoc, no options needed + return '' + + e = env['ESCAPE'] + if env['PLATFORM'] == 'win32': + return e('--plugin=protoc-gen-nanopb=' + os.path.join(n, 'generator', 'protoc-gen-nanopb.bat')) + else: + return e('--plugin=protoc-gen-nanopb=' + os.path.join(n, 'generator', 'protoc-gen-nanopb')) + +def _nanopb_proto_actions(source, target, env, for_signature): + esc = env['ESCAPE'] + dirs = ' '.join(['-I' + esc(env.GetBuildPath(d)) for d in env['PROTOCPATH']]) + return '$PROTOC $PROTOCFLAGS %s --nanopb_out=. %s' % (dirs, esc(str(source[0]))) + +def _nanopb_proto_emitter(target, source, env): + basename = os.path.splitext(str(source[0]))[0] + target.append(basename + '.pb.h') + + if os.path.exists(basename + '.options'): + source.append(basename + '.options') + + return target, source + +_nanopb_proto_builder = SCons.Builder.Builder( + generator = _nanopb_proto_actions, + suffix = '.pb.c', + src_suffix = '.proto', + emitter = _nanopb_proto_emitter) + +def generate(env): + '''Add Builder for nanopb protos.''' + + env['NANOPB'] = _detect_nanopb(env) + env['PROTOC'] = _detect_protoc(env) + env['PROTOCFLAGS'] = _detect_protocflags(env) + + env.SetDefault(PROTOCPATH = ['.', os.path.join(env['NANOPB'], 'generator', 'proto')]) + + env.SetDefault(NANOPB_PROTO_CMD = '$PROTOC $PROTOCFLAGS --nanopb_out=. $SOURCES') + env['BUILDERS']['NanopbProto'] = _nanopb_proto_builder + +def exists(env): + return _detect_protoc(env) and _detect_protoc_opts(env) + |