release: Backport Go 1.25 to macOS 10.13

.github/setup_go_for_macos1013.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+VERSION="1.25.8"
+PATCH_COMMITS=(
+  "afe69d3cec1c6dcf0f1797b20546795730850070"
+  "1ed289b0cf87dc5aae9c6fe1aa5f200a83412938"
+)
+CURL_ARGS=(
+  -fL
+  --silent
+  --show-error
+)
+
+if [[ -n "${GITHUB_TOKEN:-}" ]]; then
+  CURL_ARGS+=(-H "Authorization: Bearer ${GITHUB_TOKEN}")
+fi
+
+mkdir -p "$HOME/go"
+cd "$HOME/go"
+wget "https://dl.google.com/go/go${VERSION}.darwin-arm64.tar.gz"
+tar -xzf "go${VERSION}.darwin-arm64.tar.gz"
+#cp -a go go_bootstrap
+mv go go_osx
+cd go_osx
+
+# these patch URLs only work on golang1.25.x
+# that means after golang1.26 release it must be changed
+# see: https://github.com/SagerNet/go/commits/release-branch.go1.25/
+# revert:
+# 33d3f603c1: "cmd/link/internal/ld: use 12.0.0 OS/SDK versions for macOS linking"
+# 937368f84e: "crypto/x509: change how we retrieve chains on darwin"
+
+for patch_commit in "${PATCH_COMMITS[@]}"; do
+  curl "${CURL_ARGS[@]}" "https://github.com/SagerNet/go/commit/${patch_commit}.diff" | patch --verbose -p 1
+done
+
+# Rebuild is not needed: we build with CGO_ENABLED=1, so Apple's external
+# linker handles LC_BUILD_VERSION via MACOSX_DEPLOYMENT_TARGET, and the
+# stdlib (crypto/x509) is compiled from patched src automatically.
+#cd src
+#GOROOT_BOOTSTRAP="$HOME/go/go_bootstrap" ./make.bash
+#cd ../..
+#rm -rf go_bootstrap "go${VERSION}.darwin-arm64.tar.gz"