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| 1 | +# Copyright 2018-present RethinkDB |
| 2 | +# |
| 3 | +# Licensed under the Apache License, Version 2.0 (the "License"); you may not use |
| 4 | +# this file except in compliance with the License. You may obtain a copy of the |
| 5 | +# License at |
| 6 | +# |
| 7 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +# |
| 9 | +# Unless required by applicable law or agreed to in writing, software distributed |
| 10 | +# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR |
| 11 | +# CONDITIONS OF ANY KIND, either express or implied. See the License for the |
| 12 | +# specific language governing permissions and limitations under the License. |
| 13 | +# |
| 14 | +# This file incorporates work covered by the following copyright: |
| 15 | +# |
| 16 | +# Copyright 2010-present, The Linux Foundation, portions copyright Google and |
| 17 | +# others and used with permission or subject to their respective license |
| 18 | +# agreements. |
| 19 | +# |
| 20 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 21 | +# you may not use this file except in compliance with the License. |
| 22 | +# You may obtain a copy of the License at |
| 23 | +# |
| 24 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 25 | +# |
| 26 | +# Unless required by applicable law or agreed to in writing, software |
| 27 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 28 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 29 | +# See the License for the specific language governing permissions and |
| 30 | +# limitations under the License. |
| 31 | + |
| 32 | +''' |
| 33 | +Take a .proto file as input and output the a definitions file for a |
| 34 | +supported language: javascript, python, ruby |
| 35 | +
|
| 36 | +Usually the input file should be ../src/rdb_protocol/ql2.proto |
| 37 | +''' |
| 38 | + |
| 39 | +import os |
| 40 | +import re |
| 41 | +import sys |
| 42 | + |
| 43 | +languageDefs = { |
| 44 | + "python": { |
| 45 | + "initialIndentLevel": 0, |
| 46 | + "header": "# DO NOT EDIT\n# Autogenerated by %s\n" % |
| 47 | + os.path.basename(__file__), |
| 48 | + "separator": "", |
| 49 | + "open": "\n%(tabs)sclass %(name)s:", |
| 50 | + "value": "\n%(tabs)s%(name)s = %(value)s", |
| 51 | + "empty": "pass", |
| 52 | + "close": None, |
| 53 | + "closeAlwaysNewLine": False, |
| 54 | + "footer": "\n" |
| 55 | + }, |
| 56 | + "ruby": { |
| 57 | + "initialIndentLevel": 1, |
| 58 | + "header": "# DO NOT EDIT\n# Autogenerated by %s\n\nmodule RethinkDB" |
| 59 | + % os.path.basename(__file__), |
| 60 | + "separator": "", |
| 61 | + "open": "\n%(tabs)smodule %(name)s", |
| 62 | + "value": "\n%(tabs)s%(name)s = %(value)s", |
| 63 | + "empty": None, |
| 64 | + "close": "end", |
| 65 | + "closeAlwaysNewLine": True, |
| 66 | + "footer": "\nend\n" |
| 67 | + }, |
| 68 | + "javascript": { |
| 69 | + "initialIndentLevel": 1, |
| 70 | + "header": |
| 71 | + "// DO NOT EDIT\n// Autogenerated by %s\n\nmodule.exports = {" |
| 72 | + % os.path.basename(__file__), |
| 73 | + "separator": ",", |
| 74 | + "open": "\n%(tabs)s%(name)s: {", |
| 75 | + "value": "\n%(tabs)s%(name)s: %(value)s", |
| 76 | + "empty": None, |
| 77 | + "close": "}", |
| 78 | + "closeAlwaysNewLine": False, |
| 79 | + "footer": "\n}\n" |
| 80 | + } |
| 81 | +} |
| 82 | + |
| 83 | + |
| 84 | +def convertFile(inputFile, outputFile, language): |
| 85 | + assert(inputFile is not None and hasattr(inputFile, 'read')) |
| 86 | + assert(outputFile is not None and hasattr(outputFile, 'write')) |
| 87 | + assert(language in languageDefs) |
| 88 | + |
| 89 | + messageRegex = re.compile('\s*(message|enum) (?P<name>\w+) \{') |
| 90 | + valueRegex = re.compile('\s*(?P<name>\w+)\s*=\s*(?P<value>\w+)') |
| 91 | + endRegex = re.compile('\s*\}') |
| 92 | + |
| 93 | + indentLevel = languageDefs[language]["initialIndentLevel"] |
| 94 | + lastIndentLevel = languageDefs[language]["initialIndentLevel"] - 1 |
| 95 | + |
| 96 | + # -- write headers |
| 97 | + |
| 98 | + outputFile.write(languageDefs[language]["header"]) |
| 99 | + |
| 100 | + # -- convert the body |
| 101 | + |
| 102 | + levelHasContent = False |
| 103 | + |
| 104 | + for line in inputFile: |
| 105 | + # - open |
| 106 | + match = messageRegex.match(line) |
| 107 | + if match is not None: |
| 108 | + if indentLevel == lastIndentLevel: |
| 109 | + outputFile.write(languageDefs[language]["separator"]) |
| 110 | + if levelHasContent: |
| 111 | + outputFile.write("\n" + "\t" * indentLevel) |
| 112 | + outputFile.write(languageDefs[language]["open"] % { |
| 113 | + 'tabs': "\t" * indentLevel, |
| 114 | + 'name': match.group('name') |
| 115 | + }) |
| 116 | + lastIndentLevel = indentLevel |
| 117 | + indentLevel += 1 |
| 118 | + levelHasContent = False |
| 119 | + continue |
| 120 | + |
| 121 | + # - value |
| 122 | + match = valueRegex.match(line) |
| 123 | + if match is not None: |
| 124 | + if indentLevel == lastIndentLevel: |
| 125 | + outputFile.write(languageDefs[language]["separator"]) |
| 126 | + value = match.group('value') |
| 127 | + if value.startswith('0x'): |
| 128 | + value = int(value, 0) |
| 129 | + outputFile.write(languageDefs[language]["value"] % { |
| 130 | + 'tabs': "\t" * indentLevel, |
| 131 | + 'name': match.group('name'), |
| 132 | + 'value': value, |
| 133 | + }) |
| 134 | + lastIndentLevel = indentLevel |
| 135 | + levelHasContent = True |
| 136 | + continue |
| 137 | + |
| 138 | + # - close |
| 139 | + match = endRegex.match(line) |
| 140 | + if match is not None: |
| 141 | + if not levelHasContent and \ |
| 142 | + languageDefs[language]["empty"] is not None: |
| 143 | + outputFile.write( |
| 144 | + "\n" + "\t" * indentLevel + |
| 145 | + languageDefs[language]["empty"] |
| 146 | + ) |
| 147 | + lastIndentLevel = indentLevel |
| 148 | + if languageDefs[language]["close"] is not None: |
| 149 | + if indentLevel == lastIndentLevel or \ |
| 150 | + languageDefs[language]["closeAlwaysNewLine"] is True: |
| 151 | + outputFile.write("\n" + "\t" * (indentLevel - 1)) |
| 152 | + outputFile.write(languageDefs[language]["close"]) |
| 153 | + indentLevel -= 1 |
| 154 | + lastIndentLevel = indentLevel |
| 155 | + levelHasContent = True |
| 156 | + |
| 157 | + # -- write footer |
| 158 | + outputFile.write(languageDefs[language]["footer"]) |
| 159 | + |
| 160 | +if __name__ == '__main__': |
| 161 | + import optparse |
| 162 | + |
| 163 | + inputFile = sys.stdin |
| 164 | + outputFile = sys.stdout |
| 165 | + |
| 166 | + # -- parse input |
| 167 | + |
| 168 | + parser = optparse.OptionParser() |
| 169 | + parser.add_option( |
| 170 | + "-l", "--language", |
| 171 | + dest="language", |
| 172 | + help="write output for language", |
| 173 | + metavar="LANG", |
| 174 | + choices=list(languageDefs.keys()), |
| 175 | + default=None, |
| 176 | + ) |
| 177 | + parser.add_option( |
| 178 | + "-i", "--input-file", |
| 179 | + dest="inputFile", |
| 180 | + help="read from FILE (default STDIN)", |
| 181 | + metavar="FILE", |
| 182 | + default=None, |
| 183 | + ) |
| 184 | + parser.add_option( |
| 185 | + "-o", "--output-file", |
| 186 | + dest="outputFile", |
| 187 | + help="write to FILE (default STDOUT)", |
| 188 | + metavar="FILE", |
| 189 | + default=None, |
| 190 | + ) |
| 191 | + |
| 192 | + (options, args) = parser.parse_args() |
| 193 | + |
| 194 | + if options.language is None: |
| 195 | + parser.error("A language option is required") |
| 196 | + |
| 197 | + if options.inputFile is not None: |
| 198 | + try: |
| 199 | + inputFile = open(options.inputFile, 'r') |
| 200 | + except Exception as e: |
| 201 | + parser.error("Unable to open the given input file <<%s>>" |
| 202 | + ", got error: %s" % (inputFile, str(e))) |
| 203 | + |
| 204 | + if options.outputFile is not None: |
| 205 | + try: |
| 206 | + outputFile = open(options.outputFile, 'w') |
| 207 | + except Exception as e: |
| 208 | + parser.error("Unable to open the given output file <<%s>>," |
| 209 | + " got error: %s" % (outputFile, str(e))) |
| 210 | + |
| 211 | + convertFile(inputFile, outputFile, options.language) |
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