From 8e62c45af1ac35f12622e23946d20ff1485a58d3 Mon Sep 17 00:00:00 2001
From: Krzosa Karol <krzosa.karol@gmail.com>
Date: Sat, 6 Jan 2024 14:37:48 +0100
Subject: [PATCH] Add command line arguments to build

---
 build.bat           |  2 +-
 code/build_lib.cpp  | 32 +++++++++++++++++++++++++++++++-
 code/build_main.cpp | 13 ++++++++++---
 code/string.h       |  1 +
 code/table.hpp      | 29 +++++++++++++++++++++++++++++
 5 files changed, 72 insertions(+), 5 deletions(-)

diff --git a/build.bat b/build.bat
index edca8de..c3cac64 100644
--- a/build.bat
+++ b/build.bat
@@ -5,5 +5,5 @@ mkdir build
 cd build
 cl -Fe:bld.exe ../code/build_main.cpp -WX -W3 -wd4200 -diagnostics:column -nologo -Zi -D_CRT_SECURE_NO_WARNINGS /MD
 cd ..
-build\bld.exe
+build\bld.exe asd=Memes
 
diff --git a/code/build_lib.cpp b/code/build_lib.cpp
index 97ded14..1349c67 100644
--- a/code/build_lib.cpp
+++ b/code/build_lib.cpp
@@ -61,6 +61,7 @@ S8_String SRC_CacheFilename;
 MA_Arena PernamentArena;
 MA_Arena *Perm = &PernamentArena;
 CL_SearchPaths SRC_SearchPaths = {}; // @todo;
+Table<S8_String> CMDLine;
 
 void SRC_InitCache(MA_Arena *arena, S8_String cachefilename) {
     SRC_CacheFilename = cachefilename;
@@ -260,6 +261,10 @@ Strs operator+(Str a, Str b) {
     return c;
 }
 
+Strs operator+(Str a, char *b) {
+    return a + S8_MakeFromChar(b);
+}
+
 //@todo: split on any whitespace instead!
 Strs Split(char *str) {
     Str s = S8_MakeFromChar(str);
@@ -321,9 +326,34 @@ Strs ListDir(char *dir) {
     return result;
 }
 
+void ReportError(S8_String it) {
+    IO_FatalErrorf("Invalid command line argument syntax! Expected a key value pair!\n"
+                   "Here is the wrong argument: %Q\n"
+                   "Here is a good example: bld.exe profile=release platform=windows\n",
+                   it);
+}
+
 #ifndef BUILD_MAIN
 int Main();
-int main() {
+int main(int argc, char **argv) {
+
+    if (argc > 1) IO_Printf("Command line arguments:\n");
+    for (int i = 1; i < argc; i += 1) {
+        S8_String it = S8_MakeFromChar(argv[i]);
+
+        int64_t idx = 0;
+        if (S8_Find(it, "="_s, 0, &idx)) {
+            S8_String key = S8_GetPrefix(it, idx);
+            S8_String value = S8_Skip(it, idx + 1);
+            if (key.len == 0) ReportError(it);
+            if (value.len == 0) ReportError(it);
+            IO_Printf("[%d] %Q = %Q\n", i, key, value);
+
+            CMDLine.put(key, value);
+        }
+        else ReportError(it);
+    }
+
     SRC_InitCache(Perm, S8_Lit("build_file.cache"));
     int result = Main();
     if (result == 0) SRC_SaveCache();
diff --git a/code/build_main.cpp b/code/build_main.cpp
index 76c1da3..52df966 100644
--- a/code/build_main.cpp
+++ b/code/build_main.cpp
@@ -7,13 +7,20 @@ int main(int argument_count, char **arguments) {
     IO_Printf("WORKING DIR: %Q\n", OS_GetWorkingDir(Perm));
 
     S8_String cc = ON_WINDOWS("cl"_s) ON_MAC("clang"_s) ON_LINUX("gcc"_s);
+    S8_String cache_filename = "build_tool.cache"_s;
 
+    S8_String cmdline_args = S8_MakeEmpty();
     for (int i = 1; i < argument_count; i += 1) {
         S8_String arg = S8_MakeFromChar(arguments[i]);
-        if (arg == "clear_cache"_s) OS_DeleteFile("build_tool.cache"_s);
+        if (arg == "clear_cache"_s) {
+            OS_DeleteFile(cache_filename);
+            break;
+        }
+
+        cmdline_args = S8_Format(Perm, "%Q%Q ", cmdline_args, arg);
     }
 
-    SRC_InitCache(Perm, S8_Lit("build_tool.cache"));
+    SRC_InitCache(Perm, cache_filename);
 
     // Search for build file in the project directory
     S8_String build_file = {0};
@@ -62,7 +69,7 @@ int main(int argument_count, char **arguments) {
     // Run the build file
     double time = OS_GetTime();
     if (build_file.str) {
-        int result = OS_SystemF("%s%Q", IF_WINDOWS_ELSE("", "./"), exe_name);
+        int result = OS_SystemF(IF_WINDOWS_ELSE("", "./") "%Q %Q", exe_name, cmdline_args);
         if (result != 0) {
             printf("FAILED execution of the build file!\n");
             return result;
diff --git a/code/string.h b/code/string.h
index ffa23bf..ca3dd3c 100644
--- a/code/string.h
+++ b/code/string.h
@@ -1,4 +1,5 @@
 #pragma once
+#define S8_HEADER
 #include <stdint.h>
 #include <stdbool.h>
 
diff --git a/code/table.hpp b/code/table.hpp
index 4ffa3c5..fc5c2a6 100644
--- a/code/table.hpp
+++ b/code/table.hpp
@@ -203,12 +203,41 @@ struct Table {
         return &v->value;
     }
 
+    Value get(uint64_t key, Value default_value) {
+        Entry *v = get_table_entry(key);
+        if (!v) return default_value;
+        return v->value;
+    }
+
     Value *gets(char *str) {
         int len = TABLE_CStringLen(str);
         uint64_t hash = TABLE_HASH_BYTES(str, len);
         return get(hash);
     }
 
+    Value gets(char *str, Value default_value) {
+        int len = TABLE_CStringLen(str);
+        uint64_t hash = TABLE_HASH_BYTES(str, len);
+        return get(hash, default_value);
+    }
+
+    #ifdef S8_HEADER
+    Value *get(S8_String s) {
+        uint64_t hash = TABLE_HASH_BYTES(s.str. (unsigned)s.len);
+        return get(hash);
+    }
+
+    Value get(S8_String s, Value default_value) {
+        uint64_t hash = TABLE_HASH_BYTES(s.str. (unsigned)s.len);
+        return get(hash, default_value);
+    }
+
+    void put(S8_String s, const Value &value) {
+        uint64_t hash = TABLE_HASH_BYTES(s.str, (unsigned)s.len);
+        insert(hash, value);
+    }
+    #endif
+
     void puts(char *str, const Value &value) {
         int len = TABLE_CStringLen(str);
         uint64_t hash = TABLE_HASH_BYTES(str, len);