From cff1a612021a073a9c8299298e29f9f9af8b849e Mon Sep 17 00:00:00 2001
From: Adrian Ho <aho+vm-bigsur@03s.net>
Date: Wed, 30 Jun 2021 23:31:40 +0800
Subject: [PATCH] cc shim path sanitization workaround

Homebrew's `cc` shim removes all `/usr/local` paths for non-`/usr/local`
Homebrew installations (e.g. Apple Silicon Homebrew). This adds a
`setup_fuse` method that copies FUSE files into a temp hierarchy for
use during builds. (Symlinking the files doesn't work because the
shim canonicalizes all paths.)

Also add `ntfs-3g-mac` as a test case.
---
 Formula/ntfs-3g-mac.rb |  1 +
 require/macfuse.rb     | 29 ++++++++++++++++++++++-------
 2 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/Formula/ntfs-3g-mac.rb b/Formula/ntfs-3g-mac.rb
index 2de856d..195fbd3 100644
--- a/Formula/ntfs-3g-mac.rb
+++ b/Formula/ntfs-3g-mac.rb
@@ -37,6 +37,7 @@ class Ntfs3gMac < Formula
   depends_on :macos
 
   def install
+    setup_fuse
     ENV.append "LDFLAGS", "-lintl"
 
     args = %W[
diff --git a/require/macfuse.rb b/require/macfuse.rb
index 2a7feb6..aaaf47e 100644
--- a/require/macfuse.rb
+++ b/require/macfuse.rb
@@ -11,17 +11,32 @@ class MacfuseRequirement < Requirement
   end
 
   env do
-    :std if Hardware::CPU.arm?
-
     ENV.append_path "PKG_CONFIG_PATH", HOMEBREW_LIBRARY/"Homebrew/os/mac/pkgconfig/fuse"
-
-    unless HOMEBREW_PREFIX.to_s == "/usr/local"
-      ENV.append_path "HOMEBREW_LIBRARY_PATHS", "/usr/local/lib"
-      ENV.append_path "HOMEBREW_INCLUDE_PATHS", "/usr/local/include"
-    end
   end
 
   def message
     "This formula requires MacFUSE. Please run `brew install --cask macfuse` first."
   end
 end
+
+class Formula
+
+  def setup_fuse
+    unless HOMEBREW_PREFIX.to_s == "/usr/local"
+      odebug "Setting up FUSE temp environment under #{buildpath}/temp"
+      mkdir buildpath/"temp/include" do
+        Dir["/usr/local/include/fuse*"].each { |f| cp_r f, "." }
+      end
+      mkdir buildpath/"temp/lib" do
+        Dir["/usr/local/lib/*fuse*"].each { |f| cp_r f, "." }
+      end
+      Dir.glob(buildpath/"temp/**/*.*").each { |f| odebug ">>> #{f}" }
+      ENV.append "CFLAGS", "-I#{buildpath}/temp/include"
+      ENV.append "CFLAGS", "-I#{buildpath}/temp/include/fuse"
+      ENV.append "CPPFLAGS", "-I#{buildpath}/temp/include"
+      ENV.append "CPPFLAGS", "-I#{buildpath}/temp/include/fuse"
+      ENV.append "LDFLAGS", "-I#{buildpath}/temp/lib"
+    end
+  end
+
+end