Add relocate_bottle function to handle HOMEBREW_PREFIX and HOMEBREW_CELLAR placeholders

Author: Xmader

cmake/macos-brew-deps.sh

@@ -16,10 +16,38 @@ fetch_intel_bottle() {
   digest=$(echo "$index" | python3 -c 'import sys,json; print(next(m["annotations"]["sh.brew.bottle.digest"] for m in json.load(sys.stdin)["manifests"] if m["annotations"].get("org.opencontainers.image.ref.name","").endswith(".sonoma") and m["platform"]["architecture"]=="amd64"))')
   curl -fsSL -H "Authorization: Bearer $token" -o "/tmp/$3.tar.gz" "https://ghcr.io/v2/homebrew/core/$1/blobs/sha256:$digest"
   tar -xzf "/tmp/$3.tar.gz" -C "$cellar"
+  relocate_bottle "$cellar/$3"
   mkdir -p "$(brew --prefix)/opt"
   ln -sfn "$cellar/$3/$2" "$(brew --prefix)/opt/$3"
 }
 
+# Replace the @@HOMEBREW_PREFIX@@ / @@HOMEBREW_CELLAR@@ placeholders that bottles
+# ship with (normally done by `brew install` when pouring a bottle).
+relocate_bottle() {
+  local dir="$1" prefix cellar f old
+  prefix="$(brew --prefix)"
+  cellar="$(brew --cellar)"
+  _reloc() { local s="${1//@@HOMEBREW_PREFIX@@/$prefix}"; echo "${s//@@HOMEBREW_CELLAR@@/$cellar}"; }
+  # text files (scripts, .pc, .cmake, clang config, ...)
+  grep -rIl '@@HOMEBREW_' "$dir" 2>/dev/null | while IFS= read -r f; do
+    sed -i '' -e "s|@@HOMEBREW_PREFIX@@|$prefix|g" -e "s|@@HOMEBREW_CELLAR@@|$cellar|g" "$f"
+  done
+  # Mach-O files: dependent libraries, install names and rpaths
+  find "$dir" -type f ! -type l | while IFS= read -r f; do
+    file "$f" | grep -q 'Mach-O' || continue
+    chmod u+w "$f"
+    otool -L "$f" | awk 'NR>1{print $1}' | grep '@@HOMEBREW_' | while IFS= read -r old; do
+      install_name_tool -change "$old" "$(_reloc "$old")" "$f"
+    done
+    old="$(otool -D "$f" | sed -n '2p')"
+    if [[ "$old" == *@@HOMEBREW_* ]]; then install_name_tool -id "$(_reloc "$old")" "$f"; fi
+    otool -l "$f" | awk '/cmd LC_RPATH/{getline; getline; print $2}' | grep '@@HOMEBREW_' | while IFS= read -r old; do
+      install_name_tool -rpath "$old" "$(_reloc "$old")" "$f"
+    done
+    codesign -f -s - "$f" 2>/dev/null || true # ad-hoc re-sign after editing
+  done
+}
+
 install_macos_brew_deps() {
   brew update || true # allow failure
   if [[ "$(uname -m)" == "x86_64" ]]; then
@@ -40,4 +68,7 @@ install_macos_brew_deps() {
   fi
   # Both kegs are keg-only, so put them on PATH explicitly.
   export PATH="$(brew --prefix llvm@19)/bin:$(brew --prefix lld@19)/bin:$PATH"
+  # fail fast if the (manually installed) toolchain doesn't run
+  clang --version
+  ld.lld --version || true
 }