1 /**

     2  * Relational pipes

     3  * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, either version 3 of the License, or

     8  * (at your option) any later version.

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License

    16  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    17  */

    18 #pragma once

    19 

    20 #include <vector>

    21 

    22 #include <relpipe/writer/typedefs.h>

    23 #include <relpipe/cli/CLI.h>

    24 #include <relpipe/cli/RelpipeCLIException.h>

    25 

    26 #include "Configuration.h"

    27 

    28 namespace relpipe {

    29 namespace tr {

    30 namespace awk {

    31 

    32 class CLIParser {

    33 private:

    34 

    35 	// FIXME: move common methods/classes to relpipe-lib-cli or relpipe-lib-helper

    36 

    37 	string_t readNext(std::vector<string_t> arguments, int& i) {

    38 		if (i < arguments.size()) return arguments[i++];

    39 		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);

    40 	}

    41 

    42 public:

    43 

    44 	static const string_t OPTION_EXPRESSION;

    45 

    46 	Configuration parse(const std::vector<string_t>& arguments) {

    47 		Configuration c;

    48 

    49 		for (int i = 0; i < arguments.size();) {

    50 			string_t option = readNext(arguments, i);

    51 			if (option == OPTION_EXPRESSION) c.awkExpression = readNext(arguments, i);

    52 			else throw relpipe::cli::RelpipeCLIException(L"Unsupported CLI option: " + option, relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);

    53 		}

    54 

    55 		return c;

    56 	}

    57 

    58 	virtual ~CLIParser() {

    59 	}

    60 };

    61 

    62 const string_t CLIParser::OPTION_EXPRESSION = L"--expression";

    63 

    64 }

    65 }

    66 }