Planning build system simplification
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# 4coder Build System Analysis
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## Overview
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The 4coder build system is a sophisticated multi-tier architecture designed to handle cross-platform compilation for Windows, Linux, and macOS. The system consists of three main components:
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1. **Meta-Build System**: A C++ program that generates platform-specific build commands
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2. **Platform-Specific Entry Scripts**: Shell/batch scripts that compile and execute the meta-build program
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3. **Custom Layer Build System**: Separate compilation process for the customizable editor layer
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## Architecture Deep Dive
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### 1. Meta-Build System (`code/bin/4ed_build.cpp`)
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The core of the build system is a 720-line C++ program that serves as a build configuration generator. Key features:
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- **Platform Detection**: Automatically detects Windows, Linux, or macOS
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- **Compiler Support**: Handles CL (MSVC), GCC, and Clang compilers
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- **Architecture Support**: Supports both x64 and x86 architectures
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- **Build Tiers**: Manages Demo vs Super build configurations
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- **Flag Management**: Centralized handling of compilation flags and options
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#### Key Data Structures:
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```cpp
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typedef u32 Platform_Code;
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enum { Platform_Windows, Platform_Linux, Platform_Mac };
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typedef u32 Compiler_Code;
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enum { Compiler_CL, Compiler_GCC, Compiler_Clang };
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typedef u32 Arch_Code;
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enum { Arch_X64, Arch_X86 };
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typedef u32 Tier_Code;
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enum { Tier_Demo, Tier_Super };
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```
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#### Build Flags System:
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```cpp
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enum {
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OPTS = 0x1, // Compiler warnings/options
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LIBS = 0x2, // Link libraries
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ICON = 0x4, // Windows icon resource
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SHARED_CODE = 0x8, // Build as shared library
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DEBUG_INFO = 0x10, // Debug symbols
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OPTIMIZATION = 0x20, // Optimization level
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SUPER = 0x40, // Super tier features
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INTERNAL = 0x80, // Internal build flags
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SHIP = 0x100, // Shipping build
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};
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```
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### 2. Platform-Specific Entry Scripts
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Each platform has dedicated build scripts that:
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1. Compile the meta-build system (`4ed_build.cpp`)
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2. Execute the compiled meta-build program with appropriate flags
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3. Handle platform-specific compiler setup
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#### macOS (`code/bin/build-mac-dev.sh`):
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```bash
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#!/bin/bash
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g++ -std=c++11 -DDEV_BUILD -Wno-write-strings -Wno-comment -Wno-null-dereference -Wno-logical-op-parentheses -Wno-switch -o ../build/4ed_build 4ed_build.cpp
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../build/4ed_build $1
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```
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#### Linux (`code/bin/build-linux.sh`):
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```bash
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#!/bin/bash
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g++ -g -std=c++11 -DDEV_BUILD -Wno-write-strings -Wno-comment -Wno-null-dereference -Wno-logical-op-parentheses -Wno-switch -o ../build/4ed_build 4ed_build.cpp
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../build/4ed_build $1
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```
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#### Windows (`code/bin/build.bat`):
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```batch
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@echo off
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IF NOT EXIST ..\build mkdir ..\build
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pushd ..\build
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cl /I..\code /DDEV_BUILD /std:c++11 /Zi /Fe:4ed_build.exe ..\code\bin\4ed_build.cpp /link /INCREMENTAL:NO /RELEASE > NUL
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4ed_build.exe %1
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popd
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```
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### 3. Custom Layer Build System
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The custom layer (editor behavior/commands) uses a sophisticated multi-stage build process:
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#### Stage 1: Preprocessing with Meta Macros
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```bash
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clang++ -I../code -I../code/custom -I../code/custom/generated -DMETA_PASS -E 4coder_default_bindings.cpp -o 4coder_default_bindings.i
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```
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#### Stage 2: Metadata Generator Compilation
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```bash
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clang++ -I../code -I../code/custom -I../code/custom/generated -o metadata_generator 4coder_metadata_generator.cpp
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```
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#### Stage 3: Metadata Generation
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```bash
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./metadata_generator -R ../code/custom/generated/ 4coder_default_bindings.i
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```
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#### Stage 4: Final Custom Layer Compilation
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```bash
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clang++ -I../code -I../code/custom -I../code/custom/generated -shared -fPIC -o custom_4coder.so 4coder_default_bindings.cpp
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```
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### 4. Compiler-Specific Configurations
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#### Visual Studio (CL):
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```cpp
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#define CL_OPTS \
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"-W4 -wd4310 -wd4100 -wd4201 -wd4505 -wd4996 " \
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"-wd4127 -wd4510 -wd4512 -wd4610 -wd4390 " \
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"-wd4611 -wd4189 -WX -GR- -EHa- -nologo -FC"
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#define CL_LIBS_COMMON \
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"user32.lib winmm.lib gdi32.lib opengl32.lib comdlg32.lib userenv.lib "
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```
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#### GCC (Linux):
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```cpp
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#define GCC_OPTS \
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"-Wno-write-strings " \
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"-D_GNU_SOURCE -fPIC " \
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"-fno-threadsafe-statics -pthread " \
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"-Wno-unused-result " \
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"-std=c++11"
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#define GCC_LIBS_COMMON \
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"-lX11 -lpthread -lm -lrt " \
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"-lGL -ldl -lXfixes -lfreetype -lfontconfig"
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```
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#### Clang (macOS):
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```cpp
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#define CLANG_OPTS \
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"-Wno-write-strings -Wno-deprecated-declarations " \
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"-Wno-comment -Wno-switch -Wno-null-dereference " \
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"-Wno-tautological-compare -Wno-unused-result " \
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"-Wno-missing-declarations -Wno-nullability-completeness " \
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"-std=c++11 "
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#define CLANG_LIBS_COMMON \
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"-framework Cocoa -framework QuartzCore " \
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"-framework CoreServices " \
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"-framework OpenGL -framework IOKit -framework Metal -framework MetalKit "
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```
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### 5. Build Process Flow
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#### Development Build Flow:
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1. **Entry Script** (platform-specific) compiles `4ed_build.cpp`
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2. **Meta-Build Program** generates compiler commands based on platform/arch/flags
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3. **Custom Layer Build** (parallel process):
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- Preprocesses source with meta macros
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- Builds metadata generator
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- Generates API bindings
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- Compiles custom layer as shared library
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4. **Core Engine Build**:
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- Compiles `4ed_app_target.cpp` as shared library (`4ed_app.so`)
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- Compiles platform layer as main executable (`4ed`)
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5. **Resource Management**: Copies themes, fonts, configs to build directory
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#### Packaging Build Flow:
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1. **Standard Build** (as above)
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2. **Distribution Preparation**:
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- Creates versioned directory structure
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- Copies executables and shared libraries
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- Includes source code (Super tier only)
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- Copies documentation and resources
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3. **Archive Creation**: Creates ZIP files for distribution
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### 6. Key Build Outputs
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The build system produces:
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- **`4ed`**: Main editor executable (platform layer)
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- **`4ed_app.so`**: Core application logic (shared library)
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- **`custom_4coder.so`**: Custom layer with user commands (shared library)
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- **Resources**: Themes, fonts, configuration files
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- **Debug Symbols**: `.dSYM` directories (macOS), `.pdb` files (Windows)
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### 7. Build Complexity Analysis
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The current system is complex due to:
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1. **Multi-tier Architecture**: Three separate compilation units with interdependencies
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2. **Cross-platform Abstraction**: Different compilers, flags, and linking requirements
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3. **Dynamic API Generation**: Metadata generation for extensible command system
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4. **Packaging Requirements**: Multiple build tiers and distribution formats
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5. **Debug/Release Variants**: Different optimization and debugging configurations
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### 8. Simplification Opportunities
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The build system could be simplified by:
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1. **Unified Build Scripts**: Single bash script per platform instead of meta-build system
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2. **Direct Compiler Calls**: Eliminate C++ meta-build program in favor of direct clang/gcc invocations
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3. **Simplified Metadata**: Reduce or eliminate runtime metadata generation
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4. **Merged Compilation Units**: Combine core and custom layers into single executable
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5. **Standardized Toolchain**: Use consistent compiler (clang) across all platforms
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The current complexity stems from the editor's plugin architecture and cross-platform requirements, but many of these features could be maintained with a simpler build system that uses direct bash scripts calling clang with appropriate flags.
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# 4coder Build System Simplification Plan
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## Overview
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This document outlines a comprehensive plan to replace the current complex meta-build system with simple, direct bash scripts that call clang with appropriate flags. The plan maintains all essential functionality while eliminating unnecessary complexity.
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## Goals
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1. **Simplicity**: Replace meta-build C++ program with direct bash scripts
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2. **Maintainability**: Clear, readable build scripts with inline documentation
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3. **Standardization**: Use clang across all platforms for consistency
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4. **Functionality**: Preserve all essential build features and outputs
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## Current vs Target Architecture
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### Current System
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```
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Platform Script → Compile 4ed_build.cpp → Execute 4ed_build → Generate Commands → Build
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```
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### Target System
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```
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Platform Script → Direct Clang Calls → Build
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```
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## Phase 1: Foundation and Analysis (2-3 days)
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### TODO 1.1: Set Up New Build Directory Structure
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- [ ] Create `build_new/` directory for new build scripts
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- [ ] Create subdirectories:
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- `build_new/scripts/` - Main build scripts
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- `build_new/helpers/` - Helper scripts and utilities
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- `build_new/config/` - Build configuration files
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- `build_new/temp/` - Temporary files during build
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### TODO 1.2: Extract Essential Build Parameters
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- [ ] Analyze `4ed_build.cpp` to extract all compiler flags per platform
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- [ ] Document all linker flags and library dependencies
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- [ ] Create configuration file with all essential build parameters:
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```bash
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# build_new/config/build-config.sh
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# Platform-specific compiler flags, library paths, etc.
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```
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### TODO 1.3: Create Platform Detection Utility
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- [ ] Write `build_new/helpers/detect-platform.sh`:
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```bash
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#!/bin/bash
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# Returns: win32, linux, or macos
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```
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### TODO 1.4: Verify Clang Installation Requirements
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- [ ] Document clang version requirements for each platform
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- [ ] Create `build_new/helpers/check-toolchain.sh` to verify clang availability
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- [ ] Document any additional platform-specific setup needed
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## Phase 2: Core Build Script Development (4-5 days)
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### TODO 2.1: Create Master Build Script
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- [ ] Create `build_new/scripts/build.sh` as main entry point:
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```bash
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#!/bin/bash
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# Usage: ./build.sh [platform] [config] [arch]
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# Examples:
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# ./build.sh macos debug x64
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# ./build.sh linux release x64
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# ./build.sh win32 debug x64
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```
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### TODO 2.2: Implement Platform-Specific Build Functions
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- [ ] Create `build_new/scripts/build-macos.sh`:
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```bash
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#!/bin/bash
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# macOS-specific build logic using clang
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# Handles Objective-C++ files, frameworks, etc.
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```
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- [ ] Create `build_new/scripts/build-linux.sh`:
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```bash
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#!/bin/bash
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# Linux-specific build logic using clang
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# Handles X11, pthread, fontconfig, etc.
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```
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- [ ] Create `build_new/scripts/build-win32.sh`:
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```bash
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#!/bin/bash
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# Windows-specific build logic using clang
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# Handles Windows APIs, resource compilation, etc.
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```
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### TODO 2.3: Implement Core Engine Build
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- [ ] Create `build_new/scripts/build-core.sh`:
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```bash
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#!/bin/bash
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# Builds 4ed_app.so (core application logic)
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# Builds 4ed executable (platform layer)
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```
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- [ ] Extract and implement all essential compiler flags
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- [ ] Extract and implement all essential linker flags
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- [ ] Handle FreeType and other external libraries
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### TODO 2.4: Implement Custom Layer Build
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- [ ] Create `build_new/scripts/build-custom.sh`:
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```bash
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#!/bin/bash
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# Multi-stage custom layer build process
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# 1. Preprocess with -DMETA_PASS
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# 2. Build metadata generator
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# 3. Generate metadata files
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# 4. Compile custom layer shared library
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```
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- [ ] Preserve metadata generation functionality
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- [ ] Preserve API binding generation
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## Phase 3: Advanced Features (3-4 days)
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### TODO 3.1: Implement Build Configuration System
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- [ ] Create `build_new/config/flags-common.sh` - Common compiler flags
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- [ ] Create `build_new/config/flags-debug.sh` - Debug-specific flags
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- [ ] Create `build_new/config/flags-release.sh` - Release-specific flags
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- [ ] Create `build_new/config/libs-[platform].sh` - Platform-specific libraries
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### TODO 3.2: Implement Resource Management
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- [ ] Create `build_new/scripts/copy-resources.sh`:
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```bash
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#!/bin/bash
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# Copies themes, fonts, configs to build directory
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# Handles platform-specific resource requirements
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```
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### TODO 3.3: Add Build Validation
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- [ ] Create `build_new/scripts/validate-build.sh`:
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```bash
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#!/bin/bash
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# Verifies all expected build outputs exist
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# Checks library dependencies are resolved
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# Validates executable functionality
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```
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### TODO 3.4: Implement Clean Build Support
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- [ ] Create `build_new/scripts/clean.sh`:
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```bash
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#!/bin/bash
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# Removes all build artifacts
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# Supports selective cleaning (debug/release, platform-specific)
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```
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## Phase 4: Packaging and Distribution (2-3 days)
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### TODO 4.1: Create Packaging System
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- [ ] Create `build_new/scripts/package.sh`:
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```bash
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#!/bin/bash
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# Usage: ./package.sh [platform] [tier] [arch]
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# Creates distribution archives
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```
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- [ ] Implement directory structure creation
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- [ ] Implement file copying for distribution
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- [ ] Implement archive creation (ZIP format)
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### TODO 4.2: Implement Version Management
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- [ ] Create `build_new/scripts/version.sh`:
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```bash
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#!/bin/bash
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# Extracts version from 4coder_version.h
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# Generates version-specific naming
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```
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### TODO 4.3: Create Distribution Validation
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- [ ] Create `build_new/scripts/validate-package.sh`:
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```bash
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#!/bin/bash
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# Validates package contents
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# Checks all required files are present
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```
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## Phase 5: Testing and Validation (3-4 days)
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### TODO 5.1: Create Test Suite
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- [ ] Create `build_new/tests/test-build.sh`:
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```bash
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#!/bin/bash
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# Comprehensive build testing
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# Tests all platform/config combinations
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```
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- [ ] Test debug builds on all platforms
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- [ ] Test release builds on all platforms
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- [ ] Test packaging on all platforms
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### TODO 5.2: Performance Comparison
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- [ ] Create `build_new/tests/benchmark-build.sh`:
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```bash
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#!/bin/bash
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# Compares build times: old vs new system
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# Measures clean build times
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# Measures incremental build times
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```
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### TODO 5.3: Regression Testing
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- [ ] Verify all build outputs are identical to current system
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- [ ] Test custom layer loading functionality
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- [ ] Test metadata generation correctness
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- [ ] Test API binding generation correctness
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## Phase 6: Integration and Migration (2-3 days)
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### TODO 6.1: Update Project Files
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- [ ] Update `code/project.4coder` to use new build scripts
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- [ ] Update `code/custom/project.4coder` for custom layer builds
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- [ ] Update F-key bindings to use new build system
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### TODO 6.2: Create Migration Documentation
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- [ ] Document differences between old and new systems
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- [ ] Create migration guide for developers
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- [ ] Update CLAUDE.md with new build commands
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### TODO 6.3: Backup and Transition
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- [ ] Create backup of current build system
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- [ ] Implement gradual transition plan
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- [ ] Create rollback procedure if needed
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## Implementation Details
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### Script Structure Template
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Each build script should follow this structure:
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```bash
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#!/bin/bash
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set -e # Exit on error
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# Script: build-[platform].sh
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# Purpose: Build 4coder for [platform] using clang
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# Usage: ./build-[platform].sh [debug|release] [x64|x86]
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# =============================================================================
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# Configuration
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# =============================================================================
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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BUILD_ROOT="$SCRIPT_DIR/../../build"
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CONFIG_DIR="$SCRIPT_DIR/../config"
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# Source configuration files
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source "$CONFIG_DIR/build-config.sh"
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source "$CONFIG_DIR/flags-common.sh"
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# =============================================================================
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# Platform-specific settings
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# =============================================================================
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setup_platform_vars() {
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# Set platform-specific variables
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# - Compiler flags
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# - Library paths
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# - Include paths
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# - Linker flags
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}
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# =============================================================================
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# Build functions
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# =============================================================================
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build_core_engine() {
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echo "Building core engine..."
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# Document each clang call with comments
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# Example:
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# Build 4ed_app.so (core application logic)
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clang++ \
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-shared \
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-std=c++11 \
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-I"$CODE_DIR" \
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-I"$FOREIGN_DIR/freetype2" \
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-DFTECH_64_BIT \
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-DFRED_SUPER \
|
||||
-O2 \
|
||||
-o "$BUILD_DIR/4ed_app.so" \
|
||||
"$CODE_DIR/4ed_app_target.cpp" \
|
||||
"$FOREIGN_DIR/x64/libfreetype-mac.a"
|
||||
}
|
||||
|
||||
build_custom_layer() {
|
||||
echo "Building custom layer..."
|
||||
|
||||
# Stage 1: Preprocess with meta macros
|
||||
clang++ \
|
||||
-I"$CODE_DIR" \
|
||||
-I"$CUSTOM_DIR" \
|
||||
-DMETA_PASS \
|
||||
-E \
|
||||
"$CUSTOM_DIR/4coder_default_bindings.cpp" \
|
||||
-o "$BUILD_DIR/4coder_default_bindings.i"
|
||||
|
||||
# Stage 2: Build metadata generator
|
||||
clang++ \
|
||||
-std=c++11 \
|
||||
-I"$CODE_DIR" \
|
||||
-I"$CUSTOM_DIR" \
|
||||
-o "$BUILD_DIR/metadata_generator" \
|
||||
"$CUSTOM_DIR/4coder_metadata_generator.cpp"
|
||||
|
||||
# Stage 3: Generate metadata
|
||||
"$BUILD_DIR/metadata_generator" \
|
||||
-R "$CUSTOM_DIR/generated/" \
|
||||
"$BUILD_DIR/4coder_default_bindings.i"
|
||||
|
||||
# Stage 4: Compile custom layer
|
||||
clang++ \
|
||||
-shared \
|
||||
-std=c++11 \
|
||||
-I"$CODE_DIR" \
|
||||
-I"$CUSTOM_DIR" \
|
||||
-I"$CUSTOM_DIR/generated" \
|
||||
-DFTECH_64_BIT \
|
||||
-DFRED_SUPER \
|
||||
-O2 \
|
||||
-o "$BUILD_DIR/custom_4coder.so" \
|
||||
"$CUSTOM_DIR/4coder_default_bindings.cpp"
|
||||
}
|
||||
|
||||
# =============================================================================
|
||||
# Main execution
|
||||
# =============================================================================
|
||||
|
||||
main() {
|
||||
setup_platform_vars
|
||||
create_build_dirs
|
||||
build_core_engine
|
||||
build_custom_layer
|
||||
copy_resources
|
||||
validate_build
|
||||
|
||||
echo "Build completed successfully!"
|
||||
}
|
||||
|
||||
main "$@"
|
||||
```
|
||||
|
||||
### Error Handling Strategy
|
||||
|
||||
Each script should include:
|
||||
- `set -e` for exit on error
|
||||
- Validation of input parameters
|
||||
- Checking for required tools and dependencies
|
||||
- Clear error messages with suggested fixes
|
||||
- Cleanup of temporary files on failure
|
||||
|
||||
### Documentation Standards
|
||||
|
||||
Each script should include:
|
||||
- Purpose and usage in header comments
|
||||
- Inline documentation for each major step
|
||||
- Clear variable names and consistent formatting
|
||||
- Examples of usage in comments
|
||||
|
||||
## Success Criteria
|
||||
|
||||
The new build system will be considered successful when:
|
||||
|
||||
1. **Functionality**: All current build outputs are preserved
|
||||
2. **Simplicity**: No C++ meta-build program required
|
||||
3. **Maintainability**: Clear, readable bash scripts
|
||||
4. **Performance**: Build times equal or better than current system
|
||||
5. **Reliability**: No regression in build success rates
|
||||
6. **Documentation**: Clear usage instructions and examples
|
||||
|
||||
## Risks and Mitigation
|
||||
|
||||
### Risk 1: Platform-specific Compatibility Issues
|
||||
- **Mitigation**: Extensive testing on all target platforms
|
||||
- **Fallback**: Maintain current system until new system is fully validated
|
||||
|
||||
### Risk 2: Missing Build Features
|
||||
- **Mitigation**: Comprehensive analysis of current system before implementation
|
||||
- **Fallback**: Gradual migration with feature parity validation
|
||||
|
||||
### Risk 3: Performance Regression
|
||||
- **Mitigation**: Benchmark testing and optimization
|
||||
- **Fallback**: Performance profiling and targeted improvements
|
||||
|
||||
### Risk 4: Developer Disruption
|
||||
- **Mitigation**: Clear migration documentation and parallel system support
|
||||
- **Fallback**: Quick rollback procedure if issues arise
|
||||
|
||||
## Timeline Summary
|
||||
|
||||
- **Phase 1**: 2-3 days - Foundation and analysis
|
||||
- **Phase 2**: 4-5 days - Core build script development
|
||||
- **Phase 3**: 3-4 days - Advanced features
|
||||
- **Phase 4**: 2-3 days - Packaging and distribution
|
||||
- **Phase 5**: 3-4 days - Testing and validation
|
||||
- **Phase 6**: 2-3 days - Integration and migration
|
||||
|
||||
**Total Estimated Time**: 16-22 days
|
||||
|
||||
This plan provides a comprehensive roadmap for replacing the complex meta-build system with simple, maintainable bash scripts while preserving all essential functionality and ensuring a smooth transition for developers.
|
||||
Loading…
Reference in New Issue