From bccca58731cba4be574a3106820dad9b540da858 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Thu, 7 Jan 2021 13:19:35 +0300
Subject: Cygwin: option to convert symlinks to hardlinks

---
 action.yml | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'action.yml')

diff --git a/action.yml b/action.yml
index ec7170c..acc886e 100644
--- a/action.yml
+++ b/action.yml
@@ -14,6 +14,10 @@ inputs:
     description: Set up cc/c++ executables
     required: false
     default: 1
+  hardlinks:
+    description: On Cygwin, replace executable symlinks with hardlinks
+    required: false
+    default: 0
 
 runs:
   using: composite
@@ -120,6 +124,31 @@ runs:
         }
       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
-- 
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