author | František Kučera <franta-hg@frantovo.cz> |
Sat, 02 Jul 2022 19:45:18 +0200 | |
branch | v_0 |
changeset 42 | ca216de56ef0 |
parent 41 | e1339b8e838e |
permissions | -rw-r--r-- |
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/** |
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* Relational pipes |
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* Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, version 3 of the License. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#pragma once |
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#include <vector> |
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#include <iostream> |
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#include <relpipe/reader/typedefs.h> |
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#include <relpipe/cli/CLI.h> |
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#include <relpipe/cli/RelpipeCLIException.h> |
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#include "Configuration.h" |
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namespace relpipe { |
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namespace out { |
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namespace tabular { |
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class CLIParser { |
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private: |
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std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings. |
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relpipe::reader::string_t readNext(const std::vector<relpipe::reader::string_t>& arguments, int& i) { |
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if (i < arguments.size()) return arguments[i++]; |
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else throw relpipe::cli::RelpipeCLIException(L"Missing CLI argument" + (i > 0 ? (L" after " + arguments[i - 1]) : L""), relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS); |
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} |
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void addRelation(Configuration& c, RelationConfiguration& currentRelation) { |
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if (currentRelation.relation.size()) { |
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c.relationConfigurations.push_back(currentRelation); |
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} else { |
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// no relation name given → global configuration |
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c.writeTypes = currentRelation.writeTypes; |
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c.writeRelationName = currentRelation.writeRelationName; |
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c.writeRecordCount = currentRelation.writeRecordCount; |
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} |
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currentRelation = RelationConfiguration(); |
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} |
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/** |
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* TODO: use a common method |
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*/ |
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bool parseBoolean(const relpipe::reader::string_t& value) { |
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if (value == L"true") return true; |
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else if (value == L"false") return false; |
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else throw relpipe::cli::RelpipeCLIException(L"Unable to parse boolean value: " + value + L" (expecting true or false)", relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS); |
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} |
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Configuration::ColorScheme parseColorScheme(const relpipe::reader::string_t& value) { |
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if (value == L"greenish") return Configuration::ColorScheme::Greenish; |
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else if (value == L"amberish") return Configuration::ColorScheme::Amberish; |
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else if (value == L"black-and-white") return Configuration::ColorScheme::BlackAndWhite; |
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else if (value == L"midnight") return Configuration::ColorScheme::Midnight; |
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else throw relpipe::cli::RelpipeCLIException(L"Unable to parse ColorScheme value: " + value + L" (expecting greenish, amberish, midnight or black-and-white)", relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS); |
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} |
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Configuration::TableStyle parseTableStyle(const relpipe::reader::string_t& value) { |
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if (value == L"rounded") return Configuration::TableStyle::Rounded; |
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else if (value == L"sharp") return Configuration::TableStyle::Sharp; |
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else if (value == L"sharp-double") return Configuration::TableStyle::SharpDouble; |
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else if (value == L"horizontal-only") return Configuration::TableStyle::HorizontalOnly; |
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else if (value == L"ascii") return Configuration::TableStyle::Ascii; |
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else throw relpipe::cli::RelpipeCLIException(L"Unable to parse TableStyle value: " + value + L" (expecting rounded, sharp, ascii)", relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS); |
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} |
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/** |
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* TODO: move to common parent class in relpipe-lib-cli |
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* |
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* @param cliArguments original CLI arguments |
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* @param moduleName name of this program e.g. "relpipe-out-tabular" |
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* @param supportedOptions options that could be specified also as environmental variables, not only CLI arguments, including the "--" prefix e.g. "--color-scheme" |
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* @return defaults found in ENV + given CLI arguments |
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*/ |
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const std::vector<relpipe::reader::string_t> addEnvDefaults(const std::vector<relpipe::reader::string_t>& cliArguments, const relpipe::reader::string_t moduleName, const std::vector<relpipe::reader::string_t>& supportedOptions) { |
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std::vector<relpipe::reader::string_t> allArguments; |
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auto toEnv = [](char ch) { |
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92 |
return ch == '-' ? '_' : ::toupper(ch); |
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93 |
}; |
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94 |
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95 |
std::string envPrefix = convertor.to_bytes(moduleName); |
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96 |
transform(envPrefix.begin(), envPrefix.end(), envPrefix.begin(), toEnv); |
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97 |
envPrefix.append("_"); |
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98 |
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99 |
for (auto o : supportedOptions) { |
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100 |
if (o.substr(0, 2) == L"--") { |
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101 |
std::string option = convertor.to_bytes(o); |
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102 |
option.erase(0, 2); |
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103 |
transform(option.begin(), option.end(), option.begin(), toEnv); |
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104 |
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105 |
// FIXME: check argument counts (should be specified alongside with supportedOptions) to avoid injection of unwanted options through ENV variables |
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106 |
// TODO: allow repeated options? |
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107 |
for (int i = -1; i < 10; i++) { |
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108 |
std::string envName = i == -1 ? envPrefix + option : envPrefix + option + "_" + std::to_string(i); |
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109 |
const char* value = std::getenv(envName.c_str()); |
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110 |
if (value) { |
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111 |
if (i == -1 || i == 0) allArguments.push_back(o); |
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112 |
allArguments.push_back(convertor.from_bytes(value)); |
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113 |
if (i == -1) break; |
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114 |
} else { |
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115 |
if (i > -1) break; |
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116 |
} |
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117 |
} |
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118 |
} else { |
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119 |
throw std::logic_error("supportedOptions must start with '--'"); |
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120 |
} |
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121 |
} |
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122 |
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123 |
for (auto a : cliArguments) allArguments.push_back(a); |
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124 |
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125 |
return allArguments; |
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126 |
} |
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127 |
|
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128 |
public: |
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129 |
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130 |
static const relpipe::reader::string_t OPTION_RELATION; |
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131 |
static const relpipe::reader::string_t OPTION_WRITE_TYPES; |
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static const relpipe::reader::string_t OPTION_WRITE_RELATION_NAME; |
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static const relpipe::reader::string_t OPTION_WRITE_RECORD_COUNT; |
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134 |
static const relpipe::reader::string_t OPTION_COLOR_SCHEME; |
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static const relpipe::reader::string_t OPTION_TABLE_STYLE; |
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136 |
|
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137 |
Configuration parse(const std::vector<relpipe::reader::string_t>& cliArguments) { |
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138 |
Configuration c; |
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139 |
RelationConfiguration currentRelation; |
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140 |
|
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141 |
const std::vector<relpipe::reader::string_t> arguments = addEnvDefaults(cliArguments, L"relpipe-out-tabular",{OPTION_COLOR_SCHEME, OPTION_TABLE_STYLE}); |
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142 |
|
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143 |
// TODO: global configuration of writeTypes, writeRelationName, writeRecordCount |
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144 |
|
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145 |
for (int i = 0; i < arguments.size();) { |
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146 |
relpipe::reader::string_t option = readNext(arguments, i); |
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147 |
|
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148 |
if (option == OPTION_RELATION) { |
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149 |
addRelation(c, currentRelation); // previous relation |
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150 |
currentRelation.relation = readNext(arguments, i); |
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151 |
} else if (option == OPTION_WRITE_TYPES) { |
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152 |
currentRelation.writeTypes = parseBoolean(readNext(arguments, i)); |
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153 |
} else if (option == OPTION_WRITE_RELATION_NAME) { |
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154 |
currentRelation.writeRelationName = parseBoolean(readNext(arguments, i)); |
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155 |
} else if (option == OPTION_WRITE_RECORD_COUNT) { |
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156 |
currentRelation.writeRecordCount = parseBoolean(readNext(arguments, i)); |
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157 |
} else if (option == OPTION_COLOR_SCHEME) { |
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158 |
c.colorScheme = parseColorScheme(readNext(arguments, i)); |
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159 |
} else if (option == OPTION_TABLE_STYLE) { |
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160 |
c.tableStyle = parseTableStyle(readNext(arguments, i)); |
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161 |
} else throw relpipe::cli::RelpipeCLIException(L"Unsupported CLI option: " + option, relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS); |
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162 |
} |
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|
163 |
|
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164 |
addRelation(c, currentRelation); // last relation |
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|
165 |
|
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166 |
return c; |
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167 |
} |
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|
168 |
|
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169 |
virtual ~CLIParser() { |
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170 |
} |
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171 |
}; |
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|
172 |
|
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173 |
const relpipe::reader::string_t CLIParser::OPTION_RELATION = L"--relation"; |
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174 |
const relpipe::reader::string_t CLIParser::OPTION_WRITE_TYPES = L"--write-types"; |
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175 |
const relpipe::reader::string_t CLIParser::OPTION_WRITE_RELATION_NAME = L"--write-relation-name"; |
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176 |
const relpipe::reader::string_t CLIParser::OPTION_WRITE_RECORD_COUNT = L"--write-record-count"; |
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177 |
const relpipe::reader::string_t CLIParser::OPTION_COLOR_SCHEME = L"--color-scheme"; |
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178 |
const relpipe::reader::string_t CLIParser::OPTION_TABLE_STYLE = L"--table-style"; |
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179 |
|
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180 |
} |
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181 |
} |
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182 |
} |