Added subcommand interface to the build system

src/make.c

@@ -5,13 +5,27 @@
 #define CARBON_IMPLEMENTATION
 #include "../carbon.h"
 
+#define TESTBIN "./test/carbon"
 #define WORKDIR                                         \
   "carbon"                                              \
   "-" CARBON_EXPAND_AND_QUOTE(CARBON_VERSION_MAJOR)     \
   "." CARBON_EXPAND_AND_QUOTE(CARBON_VERSION_MINOR)     \
   "-" CARBON_TARGET_OS                                  \
   "-" CARBON_CPU_ARCH
 
+static const char * const help_msg = "usage: %s [SUBCMD]\n"
+  "Subcommands:\n"
+  "  help        display this help\n"
+  "  clean       remove previously created build artifacts\n"
+  "  mrproper    same as `clean` plus remove this binary\n"
+  "  check       only run tests\n"
+  "  examples    only build examples\n"
+  "\n"
+  "If not provided any subcommand, it runs the full build pipeline.\n"
+  "\n"
+  "Report bugs to: <https://github.com/sparky-game/carbon/issues>\n"
+  "%s homepage: <https://github.com/sparky-game/carbon>\n";
+
 static void call_cmd(const char *cmd) {
   if (!system(cmd)) return;
   CARBON_ERROR("Unable to run `%s`", cmd);
@@ -53,16 +67,17 @@ static inline void compress_dir(const char *path) {
 }
 
 static void run_tests(void) {
-  const char *cc_cmd = CARBON_COMPILER " -I . -std=gnu99 -Wall -Wextra -fsanitize=address,undefined test/*.c -o test/carbon";
-  const char *test_cmd = "./test/carbon -n";
-  CARBON_INFO("  CCLD    test/carbon");
-  call_cmd(cc_cmd);
+  CARBON_INFO_COLOR(CARBON_COLOR_YELLOW, "[*] Running tests...");
+  static const char *test_cmd = TESTBIN " -n";
+  CARBON_INFO("  CCLD    " TESTBIN);
+  call_cmd(CARBON_COMPILER " -I . -std=gnu99 -Wall -Wextra -fsanitize=address,undefined test/*.c -o " TESTBIN);
   CARBON_INFO("+ %s", test_cmd);
   call_cmd(test_cmd);
   return;
 }
 
 static void build_examples(void) {
+  CARBON_INFO_COLOR(CARBON_COLOR_YELLOW, "[*] Building examples...");
   usz files_count = 0;
   char **files = carbon_fs_pattern_match("examples/*.c", &files_count);
   for (usz i = 0; i < files_count; ++i) {
@@ -73,31 +88,14 @@ static void build_examples(void) {
 }
 
 static inline void clean(void) {
-  rm_dash_r("test/carbon");
+  rm_dash_r(TESTBIN);
   rm_dash_r(WORKDIR);
   rm_dash_r(WORKDIR ".tgz");
   const char *delete_cmd = "find examples -type f -executable -delete";
   CARBON_INFO("+ %s", delete_cmd);
   call_cmd(carbon_string_fmt(delete_cmd));
 }
 
-static inline void mrproper(void) {
-  clean();
-  rm_dash_r("make");
-}
-
-static void handle_args(int argc, char **argv) {
-  if (argc != 2) return;
-  if (!carbon_string_cmp(argv[1], "clean")) {
-    clean();
-    exit(0);
-  }
-  if (!carbon_string_cmp(argv[1], "mrproper")) {
-    mrproper();
-    exit(0);
-  }
-}
-
 static void build(void) {
   CARBON_INFO("  MKDIR   " WORKDIR);
   if (!carbon_fs_create_directory(WORKDIR)) {
@@ -125,10 +123,28 @@ int main(int argc, char **argv) {
     CARBON_ERROR("Unable to change CWD to binary's directory");
     return 1;
   }
-  handle_args(argc, argv);
-  CARBON_INFO_COLOR(CARBON_COLOR_YELLOW, "[*] Running tests...");
+  if (argc == 2 && !carbon_string_cmp(argv[1], "help")) {
+    CARBON_INFO_RAW(help_msg, argv[0], CARBON_NAME);
+    return 0;
+  }
+  if (argc == 2 && !carbon_string_cmp(argv[1], "clean")) {
+    clean();
+    return 0;
+  }
+  if (argc == 2 && !carbon_string_cmp(argv[1], "mrproper")) {
+    clean();
+    rm_dash_r(argv[0]);
+    return 0;
+  }
+  if (argc == 2 && !carbon_string_cmp(argv[1], "check")) {
+    run_tests();
+    return 0;
+  }
+  if (argc == 2 && !carbon_string_cmp(argv[1], "examples")) {
+    build_examples();
+    return 0;
+  }
   run_tests();
-  CARBON_INFO_COLOR(CARBON_COLOR_YELLOW, "[*] Building examples...");
   build_examples();
   CARBON_INFO_COLOR(CARBON_COLOR_YELLOW, "[*] Building and packaging...");
   build();