feat: bash build/clean scripts

Author: zaucy

build.sh

@@ -0,0 +1,118 @@
+#!/usr/bin/env bash
+
+set -e
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+ROOT_DIR=$SCRIPT_DIR
+
+cd $ROOT_DIR
+
+CPPFRONT=$ROOT_DIR/.cache/tools/cppfront
+CPP2B_DIST=$ROOT_DIR/dist/debug/cpp2b
+MODULES_DIR=$ROOT_DIR/.cache/modules
+
+mkdir -p $ROOT_DIR/.cache/repos
+mkdir -p $MODULES_DIR
+mkdir -p $ROOT_DIR/.cache/tools
+mkdir -p $ROOT_DIR/dist/debug
+
+CPP2B_COMPILER=clang-18
+
+function log_info() {
+  echo "INFO: $1"
+}
+
+function log_error() {
+  echo "ERROR: $1"
+}
+
+function fatal() {
+  echo "FATAL: $1"
+  exit 1
+}
+
+if ! [ -x "$(command -v $CPP2B_COMPILER)" ]; then
+  fatal "cannot find $CPP2B_COMPILER in your PATH"
+fi
+
+if [[ -z "${CPP2B_LIBCXX_BUILD_ROOT}" ]]; then
+  log_error "libcxx with module support must be built from source"
+  log_error "follow these instructions https://github.com/llvm/llvm-project/blob/main/libcxx/docs/Modules.rst"
+  fatal "missing CPP2B_LIBCXX_BUILD_ROOT environment variable"
+fi
+
+log_info "using libcxx build root $CPP2B_LIBCXX_BUILD_ROOT"
+
+if ! [ -d $CPP2B_LIBCXX_BUILD_ROOT ]; then
+  log_fatal "directory $CPP2B_LIBCXX_BUILD_ROOT does not exixt"
+fi
+
+function ensure_gh_repo() {
+  local repo=$1
+  local repo_path=$ROOT_DIR/.cache/repos/$repo
+  if ! [ -d $repo_path ]; then
+    mkdir -p $repo_path
+    git clone --quiet --depth=1 --filter=blob:none --sparse https://github.com/$repo $repo_path
+  fi
+}
+
+function ensure_gh_repo_subdir() {
+  local repo=$1
+  local repo_path=$ROOT_DIR/.cache/repos/$repo
+  local repo_subdir=$2
+  local repo_subdir_path=$repo_path/$repo_subdir
+  if ! [ -d $repo_subdir_path ]; then
+    cd $repo_path
+    log_info "checking out repo $repo/$reposubdir"
+    git sparse-checkout add $repo_subdir --quiet
+    cd $ROOT_DIR
+  fi
+}
+
+ensure_gh_repo "hsutter/cppfront"
+ensure_gh_repo_subdir "hsutter/cppfront" "source"
+ensure_gh_repo_subdir "hsutter/cppfront" "include"
+
+CPPFRONT_INCLUDE_DIR=$ROOT_DIR/.cache/repos/hsutter/cppfront/include
+
+LIBCXX_MODULES_DIR=$CPP2B_LIBCXX_BUILD_ROOT/modules
+LIBCXX_INCLUDE_DIR=$CPP2B_LIBCXX_BUILD_ROOT/include
+LIBCXX_LIB_DIR=$CPP2B_LIBCXX_BUILD_ROOT/lib
+
+if ! [ -x $CPPFRONT ]; then
+  log_info "compiling cppfront..."
+  cd $ROOT_DIR/.cache/repos/hsutter/cppfront/source
+  $CPP2B_COMPILER -lstdc++ -lc -lm -fuse-ld=lld -std=c++23 cppfront.cpp -o $CPPFRONT
+  cd $ROOT_DIR
+fi
+
+if ! [ -f $MODULES_DIR/std.pcm ]; then
+  cd $LIBCXX_MODULES_DIR/c++/v1
+  log_info "compiling std module..."
+
+  $CPP2B_COMPILER                        \
+    -stdlib=libc++                       \
+    -std=c++23                           \
+    -Wno-reserved-module-identifier      \
+    std.cppm                             \
+    --precompile -o $MODULES_DIR/std.pcm
+
+  cd $ROOT_DIR
+fi
+
+log_info "running cppfront..."
+$CPPFRONT src/main.cpp2 -pure -import-std -add-source-info -format-colon-errors
+
+log_info "compiling..."
+$CPP2B_COMPILER                       \
+  -stdlib=libc++                      \
+  src/main.cpp                        \
+  -std=c++23                          \
+  -fprebuilt-module-path=$MODULES_DIR \
+  -L$LIBCXX_LIB_DIR                   \
+  -lc++                               \
+  -I"$CPPFRONT_INCLUDE_DIR"           \
+  -o $CPP2B_DIST
+
+log_info "successfully built $CPP2B_DIST"

clean.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+ROOT_DIR=$SCRIPT_DIR
+
+cd $ROOT_DIR
+
+rm -rf .cache

src/main.cpp2

@@ -31,14 +31,6 @@ expect: <T>(move opt: std::optional<T>, message) -> T = {
 	return opt*;
 }
 
-expect: <T>(move v: std::variant, message) -> T = {
-	if !std::holds_alternative<T>(v) {
-		panic("ERROR: {}", message);
-	}
-
-	return std::get<T>(v);
-}
-
 main: (args) -> int = {
 	cpp2b_config_file := find_closest_file("cpp2b.toml").expect("Cannot find cpp2b config file. Are you sure you're running cpp2b in a cpp2b project?");