Major restructuring

[gen-shell.git] / src / main.cpp

diff --git a/src/main.cpp b/src/main.cpp
index a570cdd792821bfee3f38891b4a2f919c4d41f19..ae69ebb6f09f1e6ea52e4d6a5a6a9eb1ff542b97 100644 (file)
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,168 +1,90 @@
-////////////////////////////////////////////////////////////////////////////////
-//
-// Copyright 2006 - 2017, Paul Beckingham, Federico Hernandez, 2020 Armaan Bhojwani
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
-// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-// http://www.opensource.org/licenses/mit-license.php
-//
-////////////////////////////////////////////////////////////////////////////////
+// gen-shell - the generic REPL
+// Copyright (c) 2021, Armaan Bhojwani <me@armaanb.net>
 
-#include <cmake.h>
 #include <iostream>
+#include "sarge.h"
+
 #include <vector>
 #include <string>
-#include <../Sarge/src/sarge.h>
-#include <stdlib.h>
 
-#ifdef HAVE_READLINE
 #include <readline/readline.h>
 #include <readline/history.h>
-#endif
 
 ////////////////////////////////////////////////////////////////////////////////
 
 using namespace std;
 
-static std::vector <std::string> contexts;
-std::string composeContexts (bool pretty = false);
-
-int promptClear ()
-{
-  contexts.clear ();
-  return 0;
-}
-
-int promptRemove ()
-{
-  if (contexts.size ())
-    contexts.pop_back ();
-
-  return 0;
-}
-
-int promptAdd (const std::string& context)
-{
-  contexts.push_back (context);
-  return 0;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-
-const std::string getResponse(const std::string & prompt) {
+const std::string
+getResponse(const std::string & prompt) {
   std::string response {
     ""
   };
 
   // Display prompt, get input
-  #ifdef HAVE_READLINE
   char * line_read = readline(prompt.c_str());
   if (!line_read) {
     std::cout << "\n";
     response = "<EOF>";
   } else {
-    // Save history
-    if ( * line_read)
+    if (*line_read) {
       add_history(line_read);
+    }
 
     response = std::string(line_read);
     free(line_read);
   }
-  #else
-  std::cout << prompt;
-  std::getline(std::cin, response);
-  if (std::cin.eof() == 1) {
-    std::cout << "\n";
-    response = "<EOF>";
-  }
-  #endif
 
   return response;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
-int main(int argc, char** argv)
+int
+main(int argc, char** argv)
 {
-
   // Command line arguments
   Sarge sarge;
 
-       sarge.setArgument("a", "after", "Command to execute before leaving the shell", true);
-       sarge.setArgument("b", "before", "Command to execute before entering the shell", true);
-       sarge.setArgument("c", "command", "Command to convert to shell", true);
-       sarge.setArgument("h", "help", "Get help.", false);
-       sarge.setArgument("p", "prompt", "Define a custom prompt", true);
-       sarge.setDescription("Make a shell from any executable");
-       sarge.setUsage("gen-shell <options>");
-
-       if (!sarge.parseArguments(argc, argv)) {
-               std::cerr << "Couldn't parse arguments..." << std::endl;
-               return 1;
-       }
-
-       if (sarge.exists("help")) {
-               sarge.printHelp();
+  sarge.setArgument("c", "command", "Command to convert to REPL", true);
+  sarge.setArgument("h", "help", "Show this message.", false);
+  sarge.setArgument("p", "prompt", "Define a custom prompt", true);
+  sarge.setArgument("q", "quotes", "Treat whole input as argv[1]", false);
+  sarge.setDescription("Make a REPL from any executable");
+  sarge.setUsage("gen-shell <options>");
+
+  if (!sarge.parseArguments(argc, argv)) {
+    std::cerr << "Could not parse command line arguments" << std::endl;
+    return 1;
+  }
+
+  if (sarge.exists("help")) {
+    sarge.printHelp();
     return 0;
-       }
+  }
 
-  // define input command
   string arg_cmd;
   sarge.getFlag("command", arg_cmd);
-  arg_cmd += " ";
 
-  // define prompt
   string prompt = "";
   sarge.getFlag("prompt", prompt);
-
-  if ( prompt == "" )
+  if (prompt == "") {
     prompt = "% ";
-  else
-    prompt += " ";
-
-  // execute before-command
-  string before_command;
-  sarge.getFlag("before", before_command);
-  system (before_command.c_str ());
-
-  // execute after-command
-  string after_command;
-  sarge.getFlag("after", after_command);
+  }
 
-  // Main program
+  // Do the stuffs!
   while (true) {
-    // Display prompt, get input
     auto command = getResponse(prompt);
 
-    if (command != "")
-    {
-      // Dispatch command
-      if (command == "<EOF>")
-      {
-        system (after_command.c_str ());
-        return 0;
-      }
-      else if (command != "")
-      {
-        string whole_command = arg_cmd + command;
-        system (whole_command.c_str ());
+    if (command == "<EOF>" || command == "exit" || command == "quit" ) {
+      return 0;
+    } else {
+      string whole_command = arg_cmd + " ";
+      if (sarge.exists("quotes")) {
+        whole_command = whole_command + "\"" + command + "\"";
+      } else {
+        whole_command += command;
       }
+      system(whole_command.c_str());
     }
   }
 }