#!/bin/sh
# cmake/macos/fixup-libobs-rpath.sh <plugin-binary>
#
# The from-source libobs build this project's macOS bootstrap runs
# (cmake/common/buildspec_common.cmake) records its own install name (its
# LC_ID_DYLIB) as a relative path -- "libobs/libobs.framework/Versions/A/libobs"
# -- rather than an @rpath reference. That is a property of that from-source
# OBS build itself, not something this project's own link step controls: the
# LC_LOAD_DYLIB entry our plugin binary gets for a dependency is copied
# straight from that dependency's own LC_ID_DYLIB by the linker. A relative
# path is not resolvable at runtime from inside an OBS.app plugin bundle --
# see the "macOS packaging gap" this script fixes, documented in README.md.
#
# Rewrite that one dependency entry to @rpath/libobs.framework/Versions/A/libobs.
# stplugin_macos_finalize_bundle() (cmake/macos/helpers.cmake) gives the
# plugin binary an LC_RPATH of @executable_path/../Frameworks, which resolves
# @rpath against the *host* OBS.app's own Contents/Frameworks/libobs.framework
# at runtime (@executable_path is always relative to the process's main
# executable -- OBS.app/Contents/MacOS/obs -- not to this dlopen'd bundle, no
# matter how deeply the .plugin is nested under
# ~/Library/Application Support/obs-studio/plugins/<name>/bin/).
#
# The LiveKit runtime dylibs this same helper copies into the bundle's own
# Contents/Frameworks are NOT touched here: client-sdk-cpp's own release
# build already records their install names as @rpath references (confirmed
# by otool -L on prior CI runs -- see README's "Where the macOS bootstrap
# actually got to"), so the @loader_path/../Frameworks half of the same
# LC_RPATH already resolves them with no rewrite needed.
set -eu

binary="$1"

if [ ! -f "$binary" ]; then
  echo "fixup-libobs-rpath: no such file: $binary" >&2
  exit 1
fi

old_ref=$(otool -L "$binary" \
  | awk '/libobs\.framework\/Versions\/A\/libobs/ && $1 !~ /^@rpath/ {print $1; exit}')

if [ -n "${old_ref:-}" ]; then
  echo "fixup-libobs-rpath: rewriting '$old_ref' -> '@rpath/libobs.framework/Versions/A/libobs' in $binary"
  install_name_tool -change "$old_ref" "@rpath/libobs.framework/Versions/A/libobs" "$binary"
else
  echo "fixup-libobs-rpath: libobs dependency in $binary is already @rpath-relative (or was not found via otool -L); nothing to rewrite"
fi