Split code generation from the ui

cli/cl.cpp

@@ -0,0 +1,52 @@
+#include "elna/cli/cl.hpp"
+#include "elna/backend/target.hpp"
+#include <cstddef>
+#include <fstream>
+#include <sstream>
+
+namespace elna::cli
+{
+    char *readSource(const char *source)
+    {
+        const std::size_t bufferSize = 255;
+
+        std::ifstream input_stream{ source };
+        std::stringstream buffer;
+        buffer << input_stream.rdbuf();
+        input_stream.close();
+        std::string contents = buffer.str();
+        char *result = reinterpret_cast<char *>(malloc(contents.size() + 1));
+        std::copy(std::cbegin(contents), std::cend(contents), result);
+        result[contents.size()] = '\0';
+
+        return result;
+    }
+
+    int compile(const std::filesystem::path& in_file, const std::filesystem::path& out_file)
+    {
+        auto sourceText = readSource(in_file.c_str());
+        if (sourceText == nullptr)
+        {
+            return 3;
+        }
+        size_t tokensCount{ 0 };
+        auto lex_result = source::lex(sourceText);
+        free(sourceText);
+        if (lex_result.has_errors())
+        {
+            for (const auto& compile_error : lex_result.errors())
+            {
+                printf("%lu:%lu: %s\n", compile_error.line(), compile_error.column(), compile_error.what());
+            }
+            return 1;
+        }
+        auto ast = source::parser(lex_result.success()).parse();
+        if (ast == nullptr)
+        {
+            return 2;
+        }
+        backend::riscv32_elf(ast.get(), out_file);
+
+        return 0;
+    }
+}