[Tool] Enhance return code for openfpga shell

libopenfpga/libopenfpgashell/src/shell.h

@@ -148,6 +148,10 @@ class Shell {
                          const bool& batch_mode = false);
     /* Print all the commands by their classes. This is actually the help desk */
     void print_commands() const;
+    /* Find the exit code (assume quit shell now) */
+    int exit_code() const;
+    /* Show statistics of errors during command execution */
+    int execution_errors() const;
     /* Quit the shell */
     void exit() const;
   private: /* Private executors */

libopenfpga/libopenfpgashell/src/shell.tpp

@@ -401,7 +401,7 @@ void Shell<T>::print_commands() const {
 }
 
 template <class T>
-void Shell<T>::exit() const {
+int Shell<T>::exit_code() const {
   /* Check all the command status, if we see fatal errors or minor errors, we drop an error code */
   int exit_code = 0;
   for (const int& status : command_status_) {
@@ -412,10 +412,14 @@ void Shell<T>::exit() const {
     }
   } 
 
+  return exit_code;
+}
+
+template <class T>
+int Shell<T>::execution_errors() const {
   /* Show error message if we detect any errors */
   int num_err = 0;
-  if (0 != exit_code) {
-    VTR_LOG("\n");
+
   for (const ShellCommandId& cmd : commands()) {
     if (command_status_[cmd] == CMD_EXEC_FATAL_ERROR) {
       VTR_LOG_ERROR("Command '%s' execution has fatal errors\n",
@@ -429,6 +433,20 @@ void Shell<T>::exit() const {
       num_err++;
     }
   }
+
+  return num_err;
+}
+
+template <class T>
+void Shell<T>::exit() const {
+  /* Check all the command status, if we see fatal errors or minor errors, we drop an error code */
+  int shell_exit_code = exit_code();
+
+  /* Show error message if we detect any errors */
+  int num_err = 0;
+  if (0 != shell_exit_code) {
+    VTR_LOG("\n");
+    num_err = execution_errors();
   }
 
   VTR_LOG("\nFinish execution with %d errors\n",
@@ -440,7 +458,7 @@ void Shell<T>::exit() const {
   VTR_LOG("\nThank you for using %s!\n",
           name().c_str());
 
-  std::exit(exit_code);
+  std::exit(shell_exit_code);
 }
 
 /************************************************************************

openfpga/src/main.cpp

@@ -99,18 +99,21 @@ int main(int argc, char** argv) {
     if (true == start_cmd_context.option_enable(start_cmd, opt_interactive)) {
 
       shell.run_interactive_mode(openfpga_context);
-      return 0;
+      return shell.exit_code();
     } 
 
     if (true == start_cmd_context.option_enable(start_cmd, opt_script_mode)) {
       shell.run_script_mode(start_cmd_context.option_value(start_cmd, opt_script_mode).c_str(),
                             openfpga_context,
                             start_cmd_context.option_enable(start_cmd, opt_batch_exec));
-      return 0;
+      return shell.exit_code();
     }
     /* Reach here there is something wrong, show the help desk */
     openfpga::print_command_options(start_cmd);
   }
 
-  return 0;
+  /* Reach here, it means shell execution has critical errors.
+   * Return a code with fatal errors  
+   */
+  return 1;
 }