CMake构建学习笔记24-使用通用脚本构建PROJ和GEOS

1. 通用脚本

在之前的文章《CMake构建学习笔记21-通用的CMake构建脚本》中我们创建了一个通用的cmake构建脚本cmake-build.ps1：

param(
    [string]$SourceLocalPath,
    [string]$BuildDir,
    [string]$Generator,
    [string]$InstallDir,
    [string]$SymbolDir,
    [string[]]$PdbFiles,
    [hashtable]$CMakeCacheVariables,
    [bool]$MultiConfig = $false  # 控制是否使用多配置类型
)

# 清除旧的构建目录
if (Test-Path $BuildDir) {
    Remove-Item -Path $BuildDir -Recurse -Force
}
New-Item -ItemType Directory -Path $BuildDir

# 构建CMake命令行参数
$CMakeArgs = @(
    "-B", "`"$BuildDir`"",
    "-G", "`"$Generator`"",
    "-A", "x64"
)

if ($MultiConfig) {
    $CMakeArgs += "-DCMAKE_CONFIGURATION_TYPES=RelWithDebInfo"
}
else {
    $CMakeArgs += "-DCMAKE_BUILD_TYPE=RelWithDebInfo"
}

$CMakeArgs += (
    "-DCMAKE_PREFIX_PATH=`"$InstallDir`"",
    "-DCMAKE_INSTALL_PREFIX=`"$InstallDir`""
)

# 添加额外的CMake缓存变量
foreach ($key in $CMakeCacheVariables.Keys) {
    $CMakeArgs += "-D$key=$($CMakeCacheVariables[$key])"
}

# 配置CMake
cmake $SourceLocalPath $CMakeArgs

# 构建阶段，指定构建类型
cmake --build $BuildDir --config RelWithDebInfo --parallel

# 安装阶段，指定构建类型和安装目标
cmake --build $BuildDir --config RelWithDebInfo --target install

# 复制符号库
foreach ($file in $PdbFiles) {
    Write-Output $file
    if (Test-Path $file) {
        Copy-Item -Path $file -Destination $SymbolDir
    }
    else {
        Write-Output "Warning: PDB file not found: $file"
    }
}

# 清理构建目录
#Remove-Item -Path $BuildDir -Recurse -Force

在《CMake构建学习笔记22-libxml2库的构建》这篇文章中使用这个脚本构建了libxml2库：

param(
    [string]$Name = "libxml2-v2.14.4",
    [string]$SourceDir = "../Source",
    [string]$Generator,
    [string]$InstallDir,
    [string]$SymbolDir
)

# 根据 $Name 动态构建路径
$zipFilePath = Join-Path -Path $SourceDir -ChildPath "$Name.zip"
$SourcePath = Join-Path -Path $SourceDir -ChildPath $Name
$BuildDir = Join-Path -Path "." -ChildPath $Name

# 解压ZIP文件到指定目录
if (!(Test-Path $SourcePath)) {
    Expand-Archive -LiteralPath $zipFilePath -DestinationPath $SourceDir -Force
}

# 检查目标文件是否存在，以判断是否安装
$DstFilePath = "$InstallDir/bin/libxml2.dll"
if (Test-Path $DstFilePath) {
    Write-Output "The current library has been installed."
    exit 1
} 

# 复制符号库
$PdbFiles = @(
    "$BuildDir/RelWithDebInfo/libxml2.pdb"
) 

# 额外构建参数
$CMakeCacheVariables = @{
    BUILD_SHARED_LIBS = "ON"
    LIBXML2_WITH_ZLIB = "ON"
    LIBXML2_WITH_ICONV = "ON"
    LIBXML2_WITH_HTTP = "ON"
}

# 调用通用构建脚本
. ./cmake-build.ps1 -SourceLocalPath $SourcePath `
    -BuildDir $BuildDir `
    -Generator $Generator `
    -InstallDir $InstallDir `
    -SymbolDir $SymbolDir `
    -PdbFiles $PdbFiles `
    -CMakeCacheVariables $CMakeCacheVariables `
    -MultiConfig $true

因为提供了cmake构建方式的程序的构建行为是比较统一的，这个构建libxml2库的脚本可以进一步封装，形成一个通用的调用cmake-build.ps1构建程序的脚本。cmake-build.ps1只是包含了调用cmake执行构建的内容，但是其实整个构建过程需要做的事情很多，比如安装符号库、安装程序的依赖库等等，这些过程指的再封装一层构建的脚本。笔者封装的脚本build-common.ps1如下：

# build-library.ps1
param(
    [Parameter(Mandatory=$true)]
    [string]$Name,

    [Parameter(Mandatory=$true)]
    [string]$SourceDir,

    [Parameter(Mandatory=$true)]
    [string]$InstallDir,

    [string]$SymbolDir,
    [string]$Generator,
    [string]$MSBuild,

    [hashtable]$CMakeCacheVariables = @{},
    [string[]]$PdbFiles = @(),
    [string]$TargetDll,  # 用于判断是否已安装的 DLL 路径
    [bool]$MultiConfig = $false,  # 控制是否使用多配置类型
    [bool]$Force = $false,        # 是否强制重新构建
    [bool]$Cleanup = $true,        # 是否在构建完成后删除源码和构建目录
    [string[]]$Librarys = @()  # 可选的依赖库数组，例如：-Librarys "zlib", "libjpeg"
)

# 动态路径构建
$zipFilePath = Join-Path -Path $SourceDir -ChildPath "$Name.zip"
$SourcePath = Join-Path -Path $SourceDir -ChildPath $Name
$BuildDir = Join-Path -Path "." -ChildPath $Name

# 检查是否已经安装（通过目标 DLL）
if (-not $Force -and $TargetDll -and (Test-Path $TargetDll)) {
    Write-Output "Library already installed: $TargetDll"
    exit 0
}

# 创建所有依赖库的容器
if ($Librarys.Count -gt 0) {
    . "./BuildRequired.ps1"
    BuildRequired -Librarys $Librarys
}

# 确保源码目录存在：解压 ZIP
if (!(Test-Path $SourcePath)) {
    if (!(Test-Path $zipFilePath)) {
        Write-Error "Archive not found: $zipFilePath"
        exit 1
    }
    Write-Output "Extracting $zipFilePath to $SourceDir..."
    Expand-Archive -LiteralPath $zipFilePath -DestinationPath $SourceDir -Force
}

# 如果是强制构建，且构建目录已存在，先删除旧的构建目录（确保干净构建）
if ($Force -and (Test-Path $BuildDir)) {
    Write-Output "Force mode enabled. Removing previous build directory: $BuildDir"
    Remove-Item $BuildDir -Recurse -Force -ErrorAction SilentlyContinue
}

# 遍历并添加前缀
$PdbFiles = $PdbFiles | ForEach-Object {
    Join-Path -Path $BuildDir -ChildPath $_
}

# 调用通用 CMake 构建脚本
Write-Output "Starting build for $Name..."
. ./cmake-build.ps1 -SourceLocalPath $SourcePath `
    -BuildDir $BuildDir `
    -Generator $Generator `
    -InstallDir $InstallDir `
    -SymbolDir $SymbolDir `
    -PdbFiles $PdbFiles `
    -CMakeCacheVariables $CMakeCacheVariables `
    -MultiConfig $MultiConfig

if ($LASTEXITCODE -ne 0) {
    Write-Error "Build failed for $Name."
    exit $LASTEXITCODE
}

# 构建成功后，根据 Cleanup 开关决定是否删除
if ($Cleanup) {
    Write-Output "Build succeeded. Cleaning up temporary directories..."
    if (Test-Path $SourcePath) {
        Remove-Item $SourcePath -Recurse -Force -ErrorAction SilentlyContinue
        Write-Output "Removed source directory: $SourcePath"
    }
    if (Test-Path $BuildDir) {
        Remove-Item $BuildDir -Recurse -Force -ErrorAction SilentlyContinue
        Write-Output "Removed build directory: $BuildDir"
    }
}

Write-Output "Build completed for $Name."

这段脚本干了很多零碎的事情，但是对于一个完整的构建系统是必须的，比如判断是否需要强制构建、是否需要清理中间文件、安装程序的依赖库、安装符号库等等。另外，脚本的使用源代码其实是从压缩包解压出来的，这是因为笔者需要将源代码文件也值得放在git中进行管理，使用源代码压缩包更为方便。

2. 构建geos、proj

在实现了通用脚本build-common.ps1之后，构建程序就非常容易了，比如构建geos的脚本如下：

# geos.ps1
param(
    [string]$Name = "geos-3.12.2",
    [string]$SourceDir = "../Source",
    [string]$Generator,
    [string]$InstallDir,
    [string]$SymbolDir,
    [bool]$Force = $false,        # 是否强制重新构建
    [bool]$Cleanup = $true        # 是否在构建完成后删除源码和构建目录
)

# 目标文件
$DllPath = "$InstallDir/bin/geos_c.dll"

# 依赖库数组
$Librarys = @()  

# 符号库文件
$PdbFiles = @(
    "bin/RelWithDebInfo/geos.pdb",
    "bin/RelWithDebInfo/geos_c.pdb"
) 

# 额外构建参数
$CMakeCacheVariables = @{
    BUILD_TESTING = "OFF"
}

. ./build-common.ps1 -Name $Name `
    -SourceDir $SourceDir `
    -InstallDir $InstallDir `
    -SymbolDir $SymbolDir `
    -Generator $Generator `
    -TargetDll $DllPath `
    -PdbFiles $PdbFiles `
    -CMakeCacheVariables $CMakeCacheVariables `
    -MultiConfig $false `
    -Force $Force `
    -Cleanup $Cleanup `
    -Librarys $Librarys

在这个脚本中，$SourceDir是源代码压缩包所在的文件夹，$Name是压缩包和压缩包内文件夹的名称。而构建proj的脚本如下：

# proj.ps1
param(
    [string]$Name = "proj-9.4.1",
    [string]$SourceDir = "../Source",
    [string]$Generator,
    [string]$InstallDir,
    [string]$SymbolDir,
    [bool]$Force = $false,        # 是否强制重新构建
    [bool]$Cleanup = $true        # 是否在构建完成后删除源码和构建目录
)

# 目标文件
$DllPath = "$InstallDir/bin/proj_9_4.dll"

# 依赖库数组
$Librarys = @("nlohmann-json", "sqlite", "libtiff")

# 符号库文件
$PdbFiles = @(
    "bin/RelWithDebInfo/proj_9_4.pdb"
) 

# 额外构建参数
$CMakeCacheVariables = @{
    BUILD_TESTING  = "OFF"
    ENABLE_CURL    = "OFF"
    BUILD_PROJSYNC = "OFF"
}

. ./build-common.ps1 -Name $Name `
    -SourceDir $SourceDir `
    -InstallDir $InstallDir `
    -SymbolDir $SymbolDir `
    -Generator $Generator `
    -TargetDll $DllPath `
    -PdbFiles $PdbFiles `
    -CMakeCacheVariables $CMakeCacheVariables `
    -MultiConfig $false `
    -Force $Force `
    -Cleanup $Cleanup `
    -Librarys $Librarys

proj必须依赖于sqlite，具体的构建办法可参看《CMake构建学习笔记23-SQLite库的构建》。因为库程序本身就可能会依赖别的依赖库，所以在这里干脆实现了在构建库之前，也构建该库的依赖库，具体实在build-common.ps1中实现：

if ($Librarys.Count -gt 0) {
    . "./BuildRequired.ps1"
    BuildRequired -Librarys $Librarys
}

BuildRequired.ps1也是个构建脚本，具体内容非常简单，就是调用依赖库的构建脚本：

function BuildRequired {
    param (
        [string[]]$Librarys
    )

    Write-Output "------------------------------------------------"
    Write-Output "Start installing all required dependencies..."
    foreach ($item in $Librarys) {
        Write-Output "Find the library named $item and start installing..."
        # 动态构建脚本文件名并执行
        $BuildScript = "./$item.ps1";
        & $BuildScript -Generator $Generator -InstallDir $InstallDir -SymbolDir $SymbolDir
    }
    Write-Output "All required dependencies have been installed."
    Write-Output "------------------------------------------------"
}

3. 其他

提供的脚本太多，笔者确实也觉得有点太绕了，反而不如前面的文章的脚本内容直观。不过这也符合编程的基本思路吧，开始的程序都很简单直接，后来随着功能的增多，慢慢就变得越来越抽象难以理解。以上脚本都收录在项目中，可参考使用。