A build of the shell can now print the current version that was built if built with CMake

CMakeLists.txt

@@ -18,11 +18,19 @@ add_library(ink lib.c include/ink.h)
 
 add_definitions(-DINK_STEP_BATCH_COUNT=20)
 
+execute_process(
+    COMMAND git rev-parse HEAD
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    OUTPUT_VARIABLE GIT_COMMIT_HASH
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+
 add_executable(ink_exe main.c)
 target_link_libraries(ink_exe PUBLIC ink)
 target_include_directories(ink PUBLIC include)
 
 add_executable(inksh sh.c)
+target_compile_definitions(inksh PRIVATE
+    "-DGIT_COMMIT_HASH=\"${GIT_COMMIT_HASH}\"")
 target_link_libraries(inksh PUBLIC ink)
 
 # Functional tests

sh.c

@@ -8,6 +8,10 @@
 #define INK_SH_READ_BUFF 32768
 #endif // INK_SH_READ_BUFF
 
+#ifndef GIT_COMMIT_HASH
+#define GIT_COMMIT_HASH "?"
+#endif
+
 int get_type_by_name(struct context* ctx, const char* name);
 
 static void print_string(struct context* ctx, const struct elem string) {
@@ -127,6 +131,16 @@ static void call_word(struct context* ctx) {
     ink_push_fn(ctx, frame);
 }
 
+static void print_releasever(struct context* ctx) {
+    const char * commit = GIT_COMMIT_HASH;
+
+    while (*commit) {
+        ctx->putchar(ctx, *commit++);
+    }
+
+    ctx->putchar(ctx, '\n');
+}
+
 int main(int argc, char** argv) {
     char read_buffer[INK_SH_READ_BUFF];
     struct context* ctx;
@@ -135,6 +149,7 @@ int main(int argc, char** argv) {
     ink_add_native(ctx, "words?", list_words);
     ink_add_native(ctx, "words!", resolve_word);
     ink_add_native(ctx, "words.call", call_word);
+    ink_add_native(ctx, "version", print_releasever);
     end_argv = argv + argc;
     size_t cnt;
     int no_exit = 1;