feat: check for share directory relative to executable (#15)

this makes cpp2b more portable

Author: zaucy

.github/workflows/main.yaml

@@ -10,6 +10,7 @@ env:
   # https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md
   LLVM_VERSION: '18.1.3'
   CPP2B_LIBCXX_BUILD_ROOT: '/tmp/llvm-project/build'
+  CPP2B_PROJECT_ROOT: '.'
 
 jobs:
   typos-check:

build.cmd

@@ -62,7 +62,7 @@ setlocal enableextensions disabledelayedexpansion
 set "search=@CPP2B_PROJECT_ROOT@"
 set "replace=%root_dir%"
 
-set "inputFile=%root_dir%share\cpp2b.cppm.tpl"
+set "inputFile=%root_dir%share\cpp2b\cpp2b.cppm.tpl"
 set "outputFile=%root_dir%.cache\cpp2\source\_build\cpp2b.ixx"
 
 for /f "delims=" %%i in ('type "%inputFile%"') do (

build.sh

@@ -181,7 +181,7 @@ if [ -f "$ROOT_DIR/.cache/cpp2/source/_build/cpp2b.cppm" ]; then
     rm "$ROOT_DIR/.cache/cpp2/source/_build/cpp2b.cppm"
 fi
 
-cat "$ROOT_DIR/share/cpp2b.cppm.tpl" | sed "s\`@CPP2B_PROJECT_ROOT@\`$ROOT_DIR\`g" > "$ROOT_DIR/.cache/cpp2/source/_build/cpp2b.cppm"
+cat "$ROOT_DIR/share/cpp2b/cpp2b.cppm.tpl" | sed "s\`@CPP2B_PROJECT_ROOT@\`$ROOT_DIR\`g" > "$ROOT_DIR/.cache/cpp2/source/_build/cpp2b.cppm"
 
 $CPP2B_COMPILER                                       \
     -stdlib=libc++                                    \
@@ -197,6 +197,7 @@ $CPPFRONT src/main.cpp2 -pure -import-std -l -format-colon-errors -o "$ROOT_DIR/
 
 log_info "compiling..."
 $CPP2B_COMPILER                                   \
+    -g                                            \
     -stdlib=libc++                                \
     "$MODULES_DIR/cpp2b.pcm"                      \
     "$MODULES_DIR/dylib.pcm"                      \

install.cmd

@@ -1,8 +1,11 @@
 @echo off
 
 set cpp2b_dist=%~dp0dist\debug\cpp2b
+set cpp2b_share_dir=%~dp0share
 
 call %~dp0build.cmd
 
 xcopy /y /q %cpp2b_dist%.exe %USERPROFILE%\.local\bin\
 xcopy /y /q %cpp2b_dist%.pdb %USERPROFILE%\.local\bin\
+xcopy /e /i /h /y %cpp2b_share_dir% %USERPROFILE%\.local\share
+

install.sh

@@ -10,3 +10,5 @@ cd $ROOT_DIR
 
 ./build.sh
 cp dist/debug/cpp2b ~/.local/bin/cpp2b
+rm -rf ~/.local/share/cpp2b
+cp -r share/cpp2b ~/.local/share

share/cpp2b.build.cppm.tpl share/cpp2b/cpp2b.build.cppm.tplshare/cpp2b.build.cppm.tpl renamed to share/cpp2b/cpp2b.build.cppm.tpl

@@ -4,6 +4,7 @@ module;
 #	include <Windows.h>
 #else
 #	include <stdlib.h>
+#	include <unistd.h>
 #endif
 
 export module cpp2b;
@@ -22,7 +23,6 @@ export namespace cpp2b {
 enum class platform { linux, macos, windows };
 enum class compiler_type { gcc, clang, msvc };
 enum class compilation_type { debug, optimized, fast };
-enum class build_type { local, development, release };
 
 constexpr auto host_platform() -> platform {
 #if defined(_WIN32)
@@ -51,17 +51,6 @@ constexpr auto compiler() -> compiler_type {
 #	error unknown compiler
 #endif
 }
-
-constexpr auto build() -> build_type {
-	return build_type::local;
-}
-
-constexpr auto install_dir() -> const std::string_view {
-	if constexpr (build() == build_type::local) {
-		return R"_____cpp2b_____(@CPP2B_PROJECT_ROOT@)_____cpp2b_____";
-	}
-}
-
 } // namespace cpp2b
 
 export namespace cpp2b::env {
@@ -183,4 +172,47 @@ public:
 		return iterator(nullptr);
 	}
 };
+
+std::filesystem::path executable_path() {
+	static std::string executable_path_str;
+
+	if(!executable_path_str.empty()) {
+		return executable_path_str;
+	}
+
+	auto size = 260;
+	auto buffer = std::vector<char>(size);
+
+#if defined(_WIN32)
+	for (;;) {
+		DWORD len = GetModuleFileNameA(NULL, buffer.data(), size);
+		if (len == 0) {
+			executable_path_str = {};
+			return executable_path_str;
+		} else if (len < size - 1) {
+			executable_path_str = std::string(buffer.data(), len);
+			return executable_path_str;
+		}
+
+		size += 260;
+		buffer.resize(size);
+	}
+#elif defined(__linux__)
+	for (;;) {
+		ssize_t len = readlink("/proc/self/exe", buffer.data(), size - 1);
+		if (len < 0) {
+			executable_path_str = {};
+			return executable_path_str;
+		} else if (len < size - 1) {
+			executable_path_str = std::string(buffer.data(), len);
+			return executable_path_str;
+		}
+
+		size += 260;
+		buffer.resize(size);
+	}
+#else
+#	error unhandled executable_path platform
+#endif
+}
 }