Fix extract_filename function (#409)

Fix extract_filename function

.github/workflows/main.yml

@@ -143,8 +143,8 @@ jobs:
       - name: Get number of CPU cores
         uses: SimenB/github-actions-cpu-cores@v2
 
-      - name: Install mamba
-        uses: mamba-org/setup-micromamba@v1
+      - name: Install micromamba
+        uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment-wasm-build.yml
           environment-name: xeus-wasm-build

include/xeus/xhelper.hpp

@@ -24,7 +24,16 @@ namespace xeus
 {
     XEUS_API std::string get_start_message(const xconfiguration& config);
 
-    XEUS_API std::string extract_filename(int argc, char* argv[]);
+    /**
+     * @brief Extracts the filename from the command-line arguments and adjusts argc/argv.
+     *
+     * Searches for the "-f" flag in the arguments, extracts the following filename, and
+     * removes both from the argument list. `argc` is updated to reflect the changes.
+     * @param argc Reference to the argument count, modified if "-f" is found.
+     * @param argv Argument list, potentially modified.
+     * @return The extracted filename, or an empty string if not found.
+     */
+    XEUS_API std::string extract_filename(int &argc, char* argv[]);
 
     XEUS_API bool should_print_version(int argc, char* argv[]);
 

src/xhelper.cpp

@@ -30,7 +30,7 @@ namespace xeus
         return kernel_info;
     }
 
-    std::string extract_filename(int argc, char* argv[])
+    std::string extract_filename(int &argc, char* argv[])
     {
         std::string res = "";
         for (int i = 0; i < argc; ++i)

test/test_unit_kernel.cpp

@@ -55,11 +55,13 @@ namespace xeus
 
         TEST_CASE("extract_filename")
         {
+            int argc = 3;
             char* argv[2];
             argv[0] = (char*)"-f";
             argv[1] = (char*)"connection.json";
-            std::string file_name = extract_filename(3, argv);
+            std::string file_name = extract_filename(argc, argv);
             REQUIRE_EQ(file_name, "connection.json");
+            REQUIRE_EQ(argc, 1);
         }
 
         TEST_CASE("should_print_version")