Update hack/upgrade-version.sh

Co-authored-by: Preston Van Loon <pvanloon@offchainlabs.com>

changelog/bastin_version-upgrade-script.md

@@ -0,0 +1,3 @@
+### Added
+
+- Bash script for automating the version upgrade process.

hack/upgrade-version.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# ====== config ======
+OLD="OffchainLabs/prysm/v6"
+NEW="OffchainLabs/prysm/v7"
+
+# files by extension (recursive)
+EXTENSIONS=("bazel" "go" "proto")
+
+# explicit files (relative to project root)
+EXPLICIT_FILES=(
+  "hack/update-mockgen.sh"
+  "hack/update-go-pbs.sh"
+  "go.mod"
+  ".deepsource.toml"
+)
+
+# commands to run at the end, in order
+COMMANDS=(
+  'bazel run //:gazelle -- update-repos -from_file=go.mod -to_macro=deps.bzl%prysm_deps -prune=true'
+  'go mod tidy && go get ./...'
+  'bazel clean --expunge --async'
+  './hack/update-go-pbs.sh'
+  './hack/update-go-ssz.sh'
+  'go build ./... && bazel build //cmd/beacon-chain //cmd/validator'
+)
+# ====================
+
+# Detect BSD vs GNU sed (macOS vs Linux)
+if sed --version >/dev/null 2>&1; then
+  SED_INPLACE=("sed" "-i")
+else
+  # macOS / BSD sed needs an empty string after -i
+  SED_INPLACE=("sed" "-i" "")
+fi
+
+escape_sed() {
+  # escape / in pattern and replacement so sed doesn't choke
+  printf '%s' "$1" | sed 's/[\/&]/\\&/g'
+}
+
+OLD_ESCAPED=$(escape_sed "$OLD")
+NEW_ESCAPED=$(escape_sed "$NEW")
+
+############################################
+# 1) walk directory by extensions
+############################################
+for ext in "${EXTENSIONS[@]}"; do
+  while IFS= read -r -d '' file; do
+    "${SED_INPLACE[@]}" "s/${OLD_ESCAPED}/${NEW_ESCAPED}/g" "$file"
+    echo "updated (by ext): $file"
+  done < <(find . -type f -name "*.${ext}" -print0)
+done
+
+############################################
+# 2) specific files
+############################################
+for f in "${EXPLICIT_FILES[@]}"; do
+  if [[ -f "$f" ]]; then
+    "${SED_INPLACE[@]}" "s/${OLD_ESCAPED}/${NEW_ESCAPED}/g" "$f"
+    echo "updated (explicit): $f"
+  else
+    echo "warn: explicit file not found: $f" >&2
+  fi
+done
+
+############################################
+# 3) run commands in order
+############################################
+for cmd in "${COMMANDS[@]}"; do
+  echo "==> running: $cmd"
+  # use bash -c so we can have && in commands
+  bash -c "$cmd"
+  echo "==> done: $cmd"
+done
+
+echo
+echo "✅ version upgrade was successful."