#!/usr/bin/env bash

set -euo pipefail

VERSION="1.25.12"
PATCH_COMMITS=(
  "da4094da73b3b419e3f347594d805e2831f65667"
  "824aa60e77f06dbae86c20a164c78df722eb7047"
  "a3b6ba31c8cc67b6d899b978bba7b53e95afc46b"
  "edfa8de63435a409a59f60731b66ab5940d6d3a4"
  "284f9b24d6284984966a8431e30fdc2583938f96"
  "9864798dee8dd47b55d1d5100d2f1b909a2a6e6c"
)
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${VERSION}.linux-amd64.tar.gz"
tar -xzf "go${VERSION}.linux-amd64.tar.gz"
mv go go_win7
cd go_win7

# modify from https://github.com/restic/restic/issues/4636#issuecomment-1896455557
# these patch URLs only work on golang1.25.x
# that means after golang1.26 release it must be changed
# see: https://github.com/MetaCubeX/go/commits/release-branch.go1.25/
# revert:
# 693def151adff1af707d82d28f55dba81ceb08e1: "crypto/rand,runtime: switch RtlGenRandom for ProcessPrng"
# 7c1157f9544922e96945196b47b95664b1e39108: "net: remove sysSocket fallback for Windows 7"
# 48042aa09c2f878c4faa576948b07fe625c4707a: "syscall: remove Windows 7 console handle workaround"
# a17d959debdb04cd550016a3501dd09d50cd62e7: "runtime: always use LoadLibraryEx to load system libraries"
# fixes:
# bed309eff415bcb3c77dd4bc3277b682b89a388d: "Fix os.RemoveAll not working on Windows7"
# 34b899c2fb39b092db4fa67c4417e41dc046be4b: "Revert \"os: remove 5ms sleep on Windows in (*Process).Wait\""

for patch_commit in "${PATCH_COMMITS[@]}"; do
  curl "${CURL_ARGS[@]}" "https://github.com/MetaCubeX/go/commit/${patch_commit}.diff" | patch --verbose -p 1
done