Print warning and error count at end of execution

Signed-off-by: David Shah <dave@ds0.me>

common/command.cc

@@ -36,6 +36,7 @@
 #include "jsonparse.h"
 #include "log.h"
 #include "timing.h"
+#include "util.h"
 #include "version.h"
 
 NEXTPNR_NAMESPACE_BEGIN
@@ -282,6 +283,15 @@ void CommandHandler::conflicting_options(const boost::program_options::variables
     }
 }
 
+void CommandHandler::printFooter()
+{
+    int warning_count = get_or_default(message_count_by_level, LogLevel::WARNING, 0),
+        error_count = get_or_default(message_count_by_level, LogLevel::ERROR, 0);
+    if (warning_count > 0 || error_count > 0)
+        log_always("%d warning%s, %d error%s\n", warning_count, warning_count == 1 ? "" : "s", error_count,
+                   error_count == 1 ? "" : "s");
+}
+
 int CommandHandler::exec()
 {
     try {
@@ -300,8 +310,11 @@ int CommandHandler::exec()
         settings = std::unique_ptr<Settings>(new Settings(ctx.get()));
         setupContext(ctx.get());
         setupArchContext(ctx.get());
-        return executeMain(std::move(ctx));
+        int rc = executeMain(std::move(ctx));
+        printFooter();
+        return rc;
     } catch (log_execution_error_exception) {
+        printFooter();
         return -1;
     }
 }

common/command.h

@@ -54,6 +54,7 @@ class CommandHandler
     int executeMain(std::unique_ptr<Context> ctx);
     po::options_description getGeneralOptions();
     void run_script_hook(const std::string &name);
+    void printFooter();
 
   protected:
     po::variables_map vm;

common/log.cc

@@ -38,6 +38,7 @@ log_write_type log_write_function = nullptr;
 std::string log_last_error;
 void (*log_error_atexit)() = NULL;
 
+std::unordered_map<LogLevel, int> message_count_by_level;
 static int log_newline_count = 0;
 bool had_nonfatal_error = false;
 
@@ -112,6 +113,7 @@ void logv(const char *format, va_list ap, LogLevel level = LogLevel::LOG)
 
 void log_with_level(LogLevel level, const char *format, ...)
 {
+    message_count_by_level[level]++;
     va_list ap;
     va_start(ap, format);
     logv(format, ap, level);

common/log.h

@@ -26,8 +26,8 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <string>
+#include <unordered_map>
 #include <vector>
-
 #include "nextpnr.h"
 
 NEXTPNR_NAMESPACE_BEGIN
@@ -57,6 +57,7 @@ extern log_write_type log_write_function;
 extern std::string log_last_error;
 extern void (*log_error_atexit)();
 extern bool had_nonfatal_error;
+extern std::unordered_map<LogLevel, int> message_count_by_level;
 
 std::string stringf(const char *fmt, ...);
 std::string vstringf(const char *fmt, va_list ap);