name: Install Clang description: Install Clang & LLVM inputs: version: description: Version to install required: false default: latest platform: description: Target platform required: false default: x64 cygwin: description: Install Cygwin packages required: false default: 0 cc: description: Set up cc/clang/c++/clang++ executables required: false default: 1 hardlinks: description: On Cygwin, replace executable symlinks with hardlinks required: false default: 0 outputs: clang: description: clang binary name value: '${{ steps.install.outputs.clang }}' clangxx: description: clang++ binary name value: '${{ steps.install.outputs.clangxx }}' runs: using: composite steps: - id: install run: | New-Variable os -Value '${{ runner.os }}' -Option Constant New-Variable linux_host -Value ($os -eq 'Linux') -Option Constant New-Variable cygwin_host -Value ('${{ inputs.cygwin }}' -eq '1') -Option Constant New-Variable windows_host -Value ($os -eq 'Windows' -and !$cygwin_host) -Option Constant New-Variable version -Value ('${{ inputs.version }}') -Option Constant New-Variable latest -Value ($version -eq 'latest') -Option Constant New-Variable x64 -Value ('${{ inputs.platform }}' -eq 'x64') -Option Constant function Locate-Choco { $path = Get-Command 'choco' -ErrorAction SilentlyContinue if ($path) { $path.Path } else { Join-Path ${env:ProgramData} 'chocolatey' 'bin' 'choco' } } function Install-Package { param( [Parameter(Mandatory=$true, ValueFromRemainingArguments=$true)] [string[]] $Packages ) if ($script:linux_host) { sudo apt-get update sudo DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends $Packages } elseif ($script:cygwin_host) { $choco = Locate-Choco & $choco install $Packages -y --no-progress --source=cygwin } elseif ($script:windows_host) { $choco = Locate-Choco & $choco upgrade $Packages -y --no-progress --allow-downgrade } else { throw "Sorry, installing packages is unsupported on $script:os" } } function Format-UpstreamVersion { param( [Parameter(Mandatory=$true)] [string] $Version ) switch -Exact ($Version) { # Since version 7, they dropped the .0 suffix. The earliest # version supported is 3.9 on Bionic; versions 4, 5 and 6 are # mapped to LLVM-friendly 4.0, 5.0 and 6.0. '4' { '4.0' } '5' { '5.0' } '6' { '6.0' } default { $Version } } } function Format-AptLine { param( [Parameter(Mandatory=$true)] [string] $Version ) if (!(Get-Command lsb_release -ErrorAction SilentlyContinue)) { throw "Couldn't find lsb_release; LLVM only provides repositories for Debian/Ubuntu" } $codename = lsb_release -sc "deb http://apt.llvm.org/$codename/ llvm-toolchain-$codename-$Version main" } function Add-UpstreamRepo { param( [Parameter(Mandatory=$true)] [string] $Version ) wget -qO - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add - $apt_line = Format-AptLine $Version sudo add-apt-repository --yes --update $apt_line } $clang = 'clang' $clangxx = 'clang++' if ($linux_host) { $pkg_clang = 'clang' $pkg_llvm = 'llvm' $pkg_gxx = 'g++' if (!$latest) { $pkg_version = Format-UpstreamVersion $version Add-UpstreamRepo $pkg_version $pkg_clang = "$pkg_clang-$pkg_version" $pkg_llvm = "$pkg_llvm-$pkg_version" $clang = "$clang-$pkg_version" $clangxx = "$clangxx-$pkg_version" } if (!$x64) { $pkg_gxx = 'g++-multilib' } $packages = $pkg_clang,$pkg_llvm,$pkg_gxx Install-Package $packages } elseif ($cygwin_host) { if (!$x64) { echo @' ::warning :: 32-bit-targeting Clang is unavailable on 64-bit Cygwin. Please use 32-bit Cygwin instead. If you _are_ using 32-bit Cygwin, please ignore this message. '@ } # IDK why, but without libiconv-devel, even a "Hello, world!" # C++ app cannot be compiled as of December 2020. Also, libstdc++ # is required; it's simpler to install gcc-g++ for all the # dependencies. Install-Package clang gcc-g++ libiconv-devel llvm } elseif ($windows_host) { Install-Package llvm $bin_dir = Join-Path $env:ProgramFiles LLVM bin echo $bin_dir >> $env:GITHUB_PATH } else { throw "Sorry, installing Clang is unsupported on $os" } echo "clang=$clang" >> $env:GITHUB_OUTPUT echo "clangxx=$clangxx" >> $env:GITHUB_OUTPUT shell: pwsh - run: | New-Variable os -Value '${{ runner.os }}' -Option Constant New-Variable linux_host -Value ($os -eq 'Linux') -Option Constant New-Variable cygwin_host -Value ('${{ inputs.cygwin }}' -eq '1') -Option Constant New-Variable windows_host -Value ($os -eq 'Windows' -and !$cygwin_host) -Option Constant New-Variable cc -Value ('${{ inputs.cc }}' -eq '1') -Option Constant New-Variable clang -Value '${{ steps.install.outputs.clang }}' -Option Constant New-Variable clangxx -Value '${{ steps.install.outputs.clangxx }}' -Option Constant function Link-Exe { param( [Parameter(Mandatory=$true)] [string] $Exe, [Parameter(Mandatory=$true)] [string] $LinkName ) $exe_path = (Get-Command $Exe).Path $link_dir = if ($script:windows_host) { Split-Path $exe_path } else { '/usr/local/bin' } $link_name = if ($script:windows_host) { "$LinkName.exe" } else { $LinkName } $link_path = if ($script:cygwin_host) { "$link_dir/$link_name" } else { Join-Path $link_dir $link_name } echo "Creating link $link_path -> $exe_path" if ($script:linux_host) { sudo ln -f -s $exe_path $link_path } elseif ($script:cygwin_host) { ln.exe -f -s $exe_path $link_path } elseif ($script:windows_host) { New-Item -ItemType HardLink -Path $link_path -Value $exe_path -Force | Out-Null } } if ($cc) { Link-Exe $clang cc if ($clang -ne 'clang') { Link-Exe $clang 'clang' } Link-Exe $clangxx c++ if ($clangxx -ne 'clang++') { Link-Exe $clangxx 'clang++' } } shell: pwsh - run: | New-Variable cygwin_host -Value ('${{ inputs.cygwin }}' -eq '1') -Option Constant New-Variable hardlinks -Value ('${{ inputs.hardlinks }}' -eq '1') -Option Constant if ($cygwin_host -and $hardlinks) { # clang/clang++ are Cygwin symlinks, pointing to clang-X.exe. It's # convenient to make proper executables instead so that they can be # called from Windows' command prompt. echo @' while IFS= read -d '' -r link_path; do dest_path="$( readlink --canonicalize-existing -- "$link_path" )" dest_ext=".${dest_path##*.}" [ "$dest_ext" == ".$dest_path" ] && dest_ext= link_ext=".${link_path##*.}" [ "$link_ext" == ".$link_path" ] && link_ext= echo "Removing symlink $link_path" && rm -f -- "$link_path" [ "$link_ext" != "$dest_ext" ] && echo "${PATHEXT//\;/ }" | grep -q --ignore-case --line-regexp -F -- "$dest_ext" && link_path="$link_path$dest_ext" echo "Creating hardlink $link_path -> $dest_path" && ln -- "$dest_path" "$link_path" done < <( find /usr/local/bin /usr/bin \ -type l '-(' \ -path '/usr/bin/clang*' -o \ -path '/usr/bin/llvm*' -o \ -path /usr/local/bin/cc -o \ -path /usr/local/bin/c++ \ '-)' -print0 ) '@ | & bash.exe --login -o errexit -o nounset -o pipefail -o igncr } shell: pwsh branding: icon: star color: green