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Initial commit for zlib v1.3.2
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‎.dockerignore‎

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# Keep the Docker build context small: only the Dockerfile and build-zlib.ps1
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# are needed inside the image.
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.git
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.github
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examples
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artifacts
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*.zip
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SHA256SUMS.txt
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build-*.log
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README.md
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.gitignore

‎.gitattributes‎

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# This repository targets Windows. Keep CRLF line endings on checkout.
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* text=auto eol=crlf
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# The build script is invoked as a file by CI/Docker; CRLF is fine for pwsh.
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*.ps1 text eol=crlf
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# Anything binary that might land here stays untouched.
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*.zip binary
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*.lib binary
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*.dll binary
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*.pdb binary
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*.exe binary

‎.github/workflows/build-zlib.yml‎

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name: Build zlib (Windows)
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# Builds zlib (zlib.dll + import lib, static zlibstatic.lib) on a Windows runner
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# and uploads the headers + binaries as zip artifacts -- the same zips the Docker
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# image produces and the same layout FreeSWITCH's w32\zlib.props consumes.
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#
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# Trigger manually (Actions tab -> "Build zlib (Windows)" -> Run workflow)
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# choosing the zlib version, or push a tag like `zlib-v1.3.2` to build it and
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# attach the zips to a GitHub Release. The Release assets are what FreeSWITCH
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# downloads (see examples/freeswitch/w32/zlib.props).
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on:
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workflow_dispatch:
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inputs:
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zlib_version:
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description: 'zlib release to build (e.g. 1.3.2)'
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required: true
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default: '1.3.2'
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configs:
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description: 'Configurations to build (space-separated)'
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required: true
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default: 'Release Debug'
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platforms:
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description: 'Platforms to build (space-separated; x64-only by default, Win32 also supported)'
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required: true
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default: 'x64'
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push:
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tags:
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- 'zlib-v*' # e.g. push tag `zlib-v1.3.2`
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jobs:
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build:
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runs-on: windows-2022
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timeout-minutes: 30
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permissions:
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contents: write # needed to attach zips to a Release on tag push
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steps:
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- name: Checkout builder
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uses: actions/checkout@v4
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- name: Resolve build parameters
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id: p
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shell: pwsh
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run: |
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if ($env:GITHUB_EVENT_NAME -eq 'push') {
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# tag form: zlib-v1.3.2 -> version 1.3.2
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$ver = "$env:GITHUB_REF_NAME" -replace '^zlib-v', ''
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$cfg = 'Release Debug'
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$plat = 'x64'
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} else {
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$ver = '${{ inputs.zlib_version }}'
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$cfg = '${{ inputs.configs }}'
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$plat = '${{ inputs.platforms }}'
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}
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"zlib_version=$ver" >> $env:GITHUB_OUTPUT
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"configs=$cfg" >> $env:GITHUB_OUTPUT
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"platforms=$plat" >> $env:GITHUB_OUTPUT
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Write-Host "Building zlib $ver [$cfg] for [$plat]"
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# The runner image already has Visual Studio 2022 and CMake; build-zlib.ps1
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# enters the VC environment via vcvarsall and drives cmake from there.
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- name: Verify toolchain
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shell: pwsh
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run: |
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Write-Host "cmake: $((Get-Command cmake -ErrorAction SilentlyContinue)?.Source)"
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cmake --version
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Write-Host "tar : $((Get-Command tar -ErrorAction SilentlyContinue)?.Source)"
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- name: Build zlib + package zips
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shell: pwsh
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env:
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ZLIB_VERSION: ${{ steps.p.outputs.zlib_version }}
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CONFIGS: ${{ steps.p.outputs.configs }}
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PLATFORMS: ${{ steps.p.outputs.platforms }}
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OUT_DIR: ${{ github.workspace }}\artifacts
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ZLIB_BUILD_ROOT: C:\zb
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run: .\build-zlib.ps1
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- name: List artifacts
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shell: pwsh
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run: Get-ChildItem '${{ github.workspace }}\artifacts' | Format-Table Name, Length
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- name: Upload zips
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uses: actions/upload-artifact@v4
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with:
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name: zlib-${{ steps.p.outputs.zlib_version }}
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path: |
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artifacts/*.zip
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artifacts/SHA256SUMS.txt
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artifacts/*.log
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if-no-files-found: error
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retention-days: 30
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# On a tag push, attach the zips to a GitHub Release: that is where FreeSWITCH
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# downloads them from.
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- name: Publish to Release
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if: github.event_name == 'push'
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uses: softprops/action-gh-release@v2
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with:
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files: |
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artifacts/*.zip
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artifacts/SHA256SUMS.txt

‎.gitignore‎

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# Build outputs
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/artifacts/
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*.zip
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SHA256SUMS.txt
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build-*.log
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# zlib source / build trees (when building natively in-tree)
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/zb/
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zlib-*.tar.gz
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build-*/
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# OS / editor cruft
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Thumbs.db
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.DS_Store

‎Dockerfile‎

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# escape=`
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#
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# Builds zlib on Windows (zlib.dll + import lib, and the static zlibstatic.lib)
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# and packages the headers + binaries into zip files that FreeSWITCH's Windows
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# build consumes -- the same zips the GitHub Actions workflow produces.
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#
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# This image only contains the TOOLCHAIN. The actual zlib version is built at
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# `docker run` time from an env var, so you can produce a new release without
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# rebuilding the (slow, multi-GB) toolchain layer.
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#
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# Build the toolchain image once:
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# docker build -t zlib-packaging .
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#
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# Produce zips for a zlib release (writes to .\artifacts on the host):
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# docker run --rm --cpus 4 --memory 4g `
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# -e ZLIB_VERSION=1.3.2 `
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# -v ${PWD}\artifacts:C:\artifacts `
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# zlib-packaging
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#
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# Requires Windows containers. The host must be able to run a Windows base image
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# of an equal-or-older build than the host (process isolation), otherwise run
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# with `--isolation=hyperv`.
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ARG WINDOWS_BASE=mcr.microsoft.com/windows/servercore:ltsc2025
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FROM ${WINDOWS_BASE}
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# The Visual Studio bootstrapper. aka.ms/vs/17/release installs the latest VS 2022
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# Build Tools.
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ARG VS_BOOTSTRAPPER_URL=https://aka.ms/vs/17/release/vs_buildtools.exe
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SHELL ["powershell", "-NoLogo", "-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", "$ErrorActionPreference='Stop'; $ProgressPreference='SilentlyContinue';"]
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# ---------------------------------------------------------------------------
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# 1. Chocolatey + CMake (zlib's build system; build-zlib.ps1 drives it with the
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# "NMake Makefiles" generator from inside the VC environment).
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# tar.exe (for unpacking the source tarball) ships with the base image.
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# ---------------------------------------------------------------------------
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RUN [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12; `
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Invoke-Expression ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))
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RUN choco install -y --no-progress cmake --installargs 'ADD_CMAKE_TO_SYSTEM_PATH=System'; `
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if ($LASTEXITCODE -ne 0) { throw "choco install failed ($LASTEXITCODE)" }; `
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if (-not (Test-Path 'C:\Program Files\CMake\bin\cmake.exe')) { throw 'cmake.exe not found after install' }; `
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& 'C:\Program Files\CMake\bin\cmake.exe' --version
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# ---------------------------------------------------------------------------
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# 2. Visual Studio 2022 Build Tools: the C++ workload (MSVC v143 + Windows SDK +
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# nmake + rc). build-zlib.ps1 enters this environment via vcvarsall.bat.
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# Exit code 3010 == success-but-reboot-required, which is fine in an image.
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# ---------------------------------------------------------------------------
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RUN Invoke-WebRequest -Uri $env:VS_BOOTSTRAPPER_URL -OutFile C:\vs_buildtools.exe; `
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Write-Host 'Installing Visual Studio Build Tools (this takes a while)...'; `
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$p = Start-Process -FilePath C:\vs_buildtools.exe -Wait -PassThru -ArgumentList `
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'--quiet','--wait','--norestart','--nocache', `
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'--installPath','C:\BuildTools', `
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'--add','Microsoft.VisualStudio.Workload.VCTools', `
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'--includeRecommended'; `
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if ($p.ExitCode -ne 0 -and $p.ExitCode -ne 3010) { throw "VS Build Tools install failed ($($p.ExitCode))" }; `
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Remove-Item C:\vs_buildtools.exe -Force
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# ---------------------------------------------------------------------------
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# 3. Build driver.
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# ---------------------------------------------------------------------------
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COPY build-zlib.ps1 C:\build-zlib.ps1
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# Defaults; override any of these with `docker run -e ...`.
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ENV ZLIB_VERSION=1.3.2 `
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CONFIGS="Release Debug" `
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PLATFORMS="x64" `
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PKG_PREFIX=zlib `
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OUT_DIR=C:\artifacts `
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ZLIB_BUILD_ROOT=C:\zb
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# NOTE: do NOT set `ENV PATH` here -- the Windows base image exports the variable
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# as `Path` (mixed case) and Docker's ${...} substitution is case-sensitive, so
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# `${PATH}` would expand to empty and wipe System32 from the path. The installers
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# register their dirs in the machine PATH (which container processes inherit), and
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# build-zlib.ps1 prepends the CMake dir defensively at runtime.
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ENTRYPOINT ["C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe", "-NoLogo", "-NoProfile", "-ExecutionPolicy", "Bypass", "-File", "C:\\build-zlib.ps1"]

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