Enabled file magic support for xeus-cpp-lite (#261)

* added file magic in xeus-lite

Author: kr-2003

CMakeLists.txt

@@ -213,12 +213,12 @@ set(XEUS_CPP_SRC
     src/xoptions.cpp
     src/xparser.cpp
     src/xutils.cpp
+    src/xmagics/os.cpp
 )
 
 if(NOT EMSCRIPTEN)
     list(APPEND XEUS_CPP_SRC
         src/xmagics/xassist.cpp
-        src/xmagics/os.cpp
     )
 endif()
 

docs/source/file_magic.png

@@ -12,7 +12,7 @@ Here are the magics available in xeus-cpp.
 %%xassist 
 ========================
 
-Leverage the large language models to assist in your development process. Currently supported models are Gemini, OpenAI, Ollama.
+Leverage the large language models to assist in your development process. Currently supported models are Gemini, OpenAI, Ollama. This magic command is supported in only xeus-cpp.
 
 - Save the api key (for OpenAI and Gemini) 
 
@@ -54,3 +54,23 @@ Leverage the large language models to assist in your development process. Curren
 .. image:: gemini.png
 
 .. image:: ollama.png
+
+
+%%file
+========================
+
+This magic command copies the content of the cell in a file named `filename`. This magic command is supported in both xeus-cpp and xeus-cpp-lite.
+
+.. code::
+
+    %%file [-a] filename
+
+- Example
+
+.. image:: file_magic.png
+
+- Optional argument:
+
++------------+---------------------------------+
+| -a         | append the content to the file. |
++------------+---------------------------------+

docs/source/magics.rst

@@ -17,8 +17,8 @@
 
 #include "xinput.hpp"
 #include "xinspect.hpp"
-#ifndef EMSCRIPTEN
 #include "xmagics/os.hpp"
+#ifndef EMSCRIPTEN
 #include "xmagics/xassist.hpp"
 #endif
 #include "xparser.hpp"
@@ -372,9 +372,9 @@ __get_cxx_version ()
         // preamble_manager["magics"].get_cast<xmagics_manager>().register_magic("timeit",
         // timeit(&m_interpreter));
         // preamble_manager["magics"].get_cast<xmagics_manager>().register_magic("python", pythonexec());
+        preamble_manager["magics"].get_cast<xmagics_manager>().register_magic("file", writefile());
 #ifndef EMSCRIPTEN
         preamble_manager["magics"].get_cast<xmagics_manager>().register_magic("xassist", xassist());
-        preamble_manager["magics"].get_cast<xmagics_manager>().register_magic("file", writefile());
 #endif
     }
 }