set up cc/c++ executables

1 files changed, 70 insertions, 0 deletions

diff --git a/action.yml b/action.yml
index b80d49c..93f250a 100644
--- a/action.yml
+++ b/action.yml
@@ -14,6 +14,14 @@ inputs:
     description: Enable static linking workaround
     required: false
     default: 1
+  cc:
+    description: Set up cc/c++ executables
+    required: false
+    default: 1
+  hardlinks:
+    description: On Cygwin, replace executable symlinks with hardlinks
+    required: false
+    default: 0
 
 outputs:
   prefix:
@@ -177,6 +185,68 @@ runs:
         echo "::set-output name=windres::$windres"
       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
+
+        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 '${{ steps.setup.outputs.gcc }}' cc
+            Link-Exe '${{ steps.setup.outputs.gxx }}' c++
+        }
+      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 $hardlinks) {
+            echo @'
+        while IFS= read -d '' -r link_path; do
+            dest_path="$( 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/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