added version command

Makefile

@@ -42,6 +42,8 @@ ifeq ($(OS),Windows_NT)
 	EXEC+=.exe
 endif
 
+CFLAGS+=-DEXT_TARMAN_OS="\"$(TARMAN_OS)\""
+
 rwildcard=$(foreach d,$(wildcard $(1:=/*)),$(call rwildcard ,$d, $2) $(filter $(subst *, %, $2),$d))
 SRC=$(call rwildcard, src/common, *.c)
 SRC+=$(call rwildcard, src/os-specific/$(TARMAN_OS), *.c)

include/cli/directives/commands.h

@@ -32,6 +32,7 @@
 #define TARMAN_CMD_REMOVE_REPO "remove-repo"
 #define TARMAN_CMD_LIST_REPOS  "list-repos"
 #define TARMAN_CMD_TEST        "test"
+#define TARMAN_CMD_VERSION     "version"
 
 int cli_cmd_help(cli_info_t info);
 int cli_cmd_install(cli_info_t info);
@@ -43,3 +44,4 @@ int cli_cmd_add_repo(cli_info_t info);
 int cli_cmd_remove_repo(cli_info_t info);
 int cli_cmd_list_repos(cli_info_t info);
 int cli_cmd_test(cli_info_t info);
+int cli_cmd_version(cli_info_t info);

src/common/cli/directives/commands/version.c

@@ -0,0 +1,58 @@
+/*************************************************************************
+| tarman                                                                 |
+| Copyright (C) 2024 Alessandro Salerno                                  |
+|                                                                        |
+| This program is free software: you can redistribute it and/or modify   |
+| it under the terms of the GNU General Public License as published by   |
+| the Free Software Foundation, either version 3 of the License, or      |
+| (at your option) any later version.                                    |
+|                                                                        |
+| This program is distributed in the hope that it will be useful,        |
+| but WITHOUT ANY WARRANTY; without even the implied warranty of         |
+| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          |
+| GNU General Public License for more details.                           |
+|                                                                        |
+| You should have received a copy of the GNU General Public License      |
+| along with this program.  If not, see <https://www.gnu.org/licenses/>. |
+*************************************************************************/
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "cli/directives/types.h"
+#include "cli/output.h"
+
+#define STR_HELPER(x) #x
+#define STR(x)        STR_HELPER(x)
+
+#ifndef EXT_TARMAN_BUILD
+#define EXT_TARMAN_BUILD "unknown"
+#endif
+
+#ifndef EXT_TARMAN_OS
+#define EXT_TARMAN_OS "unknown"
+#endif
+
+#ifndef EXT_TARMAN_COMPILER
+#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
+#define EXT_TARMAN_COMPILER \
+  "gcc " STR(__GNUC__) "." STR(__GNUC_MINOR__) "." STR(__GNUC_PATCHLEVEL__)
+#elif defined(_clang_version__)
+#define EXT_TARMAN_COMPILER "clang " __clang_version__
+#elif defined(__llvm__)
+#define EXT_TARMAN_COMPILER "generic llvm"
+#else
+#define EXT_TARMAN_COMPILER "unknown"
+#endif
+#endif // EXT_TARMAN_COMPILER
+
+int cli_cmd_version(cli_info_t info) {
+  (void)info;
+
+  puts("tarman version " EXT_TARMAN_BUILD);
+  puts("target: " EXT_TARMAN_OS);
+  puts("compiled with: " EXT_TARMAN_COMPILER);
+
+  return EXIT_SUCCESS;
+}

src/common/cli/directives/lookup.c

@@ -83,6 +83,13 @@ static cli_drt_desc_t commands[] = {
     //  false,
     //  cli_cmd_list_repos,
     //  "List all local repositories"},
+
+    {NULL,
+     TARMAN_CMD_VERSION,
+     NULL,
+     false,
+     cli_cmd_version,
+     "Show version information"},
 };
 // {NULL, TARMAN_CMD_TEST, NULL, false, cli_cmd_test, "Test tarman"}};