1 ////////////////////////////////////////////////////////////////////////////////
3 // Copyright 2006 - 2017, Paul Beckingham, Federico Hernandez, 2020 Armaan Bhojwani
5 // Permission is hereby granted, free of charge, to any person obtaining a copy
6 // of this software and associated documentation files (the "Software"), to deal
7 // in the Software without restriction, including without limitation the rights
8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 // copies of the Software, and to permit persons to whom the Software is
10 // furnished to do so, subject to the following conditions:
12 // The above copyright notice and this permission notice shall be included
13 // in all copies or substantial portions of the Software.
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 // http://www.opensource.org/licenses/mit-license.php
25 ////////////////////////////////////////////////////////////////////////////////
37 #include <readline/readline.h>
38 #include <readline/history.h>
41 std::string promptCompose ();
43 const std::string getResponse (const std::string& prompt)
45 std::string response {""};
47 // Display prompt, get input.
49 char *line_read = readline (prompt.c_str ());
59 add_history (line_read);
61 response = std::string (line_read);
66 std::getline (std::cin, response);
67 if (std::cin.eof () == 1)
77 ////////////////////////////////////////////////////////////////////////////////
78 static int commandLoop (bool autoClear)
80 // Compose the prompt.
81 auto prompt = promptCompose ();
83 // Display prompt, get input.
84 auto command = getResponse (prompt);
87 std::cout << "\033[2J\033[0;0H";
90 if (! isatty (fileno (stdin)) && command == "")
94 else if (command != "")
97 if (command == "<EOF>") status = -1;
98 else if (command != "")
101 std::cout << "[" << command << "]\n";
102 system (command.c_str ());
109 ////////////////////////////////////////////////////////////////////////////////
110 int main (int argc, const char** argv)
114 // Lightweight version checking that doesn't require initialization or any I/O.
115 if (argc == 2 && !strcmp (argv[1], "--version"))
117 std::cout << VERSION << "\n";
123 bool autoClear = false;
126 autoClear = (output == "true\n" ||
132 while ((status = commandLoop (autoClear)) == 0)
136 catch (const std::string& error)
138 std::cerr << error << "\n";
144 std::cerr << "Unknown error." << "\n";
149 // Returning -1 drops out of the command loop, but gets translated to 0 here,
150 // so that there is a clean way to exit.
151 return status == -1 ? 0 : status;
154 ////////////////////////////////////////////////////////////////////////////////