add: added resign_commits.sh

resign_commits.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+set -x
+
+REPO_PATH="$1"  # Get repository path from command line argument
+OLD_BRANCH="$2"  # Old branch to resign commits
+NEW_BRANCH="new_${OLD_BRANCH}"  # New branch name
+
+# Check if the repository path and branch are provided
+if [ -z "$REPO_PATH" ] || [ -z "$OLD_BRANCH" ]; then
+  echo "Please provide the path to the Git repository and the branch name."
+  echo "Usage: ./resign_commits.sh /path/to/repository branch_name"
+  exit 1
+fi
+
+# Check if the repository path is valid
+if [ ! -d "$REPO_PATH/.git" ]; then
+  echo "Invalid repository path: $REPO_PATH"
+  exit 1
+fi
+
+cd "$REPO_PATH"  # Move to the repository directory
+
+commits=()  # Array to store commits
+
+# Check out the old branch
+git checkout "$OLD_BRANCH"
+
+# Iterate through all commits in the repository in reverse order
+for commit in $(git rev-list --reverse HEAD); do
+  commits+=("$commit")
+done
+
+if [ ${#commits[@]} -eq 0 ]; then
+  echo "No commits found."
+  exit 0
+fi
+
+# Delete the new branch if it already exists
+if git show-ref --verify --quiet refs/heads/"$NEW_BRANCH"; then
+    git branch -D "$NEW_BRANCH"
+fi
+
+# Create a new branch from the first commit in the repository
+git checkout --orphan "$NEW_BRANCH"
+
+# Reset to have a clean working directory
+git reset --hard
+
+# Resign and cherry-pick each commit
+for commit in "${commits[@]}"; do
+  echo "Resigning and cherry-picking commit: $commit"
+  if ! git cherry-pick "$commit"; then
+    # If cherry-pick fails (e.g., due to a conflict), abort the operation
+    git cherry-pick --abort
+    echo "Failed to cherry-pick commit: $commit. Aborting."
+    # Switch back to the old branch and delete the new branch
+    git checkout "$OLD_BRANCH"
+    git branch -D "$NEW_BRANCH"
+    exit 1
+  fi
+  git commit --amend --no-edit --gpg-sign --reset-author
+done
+
+# Switch to the new branch
+git checkout "$NEW_BRANCH"
+
+# Delete the old branch locally
+git branch -D "$OLD_BRANCH"
+
+# Rename the new branch to old branch name
+git branch -m "$NEW_BRANCH" "$OLD_BRANCH"
+
+# Force-push the branch to the remote
+git push origin "$OLD_BRANCH" --force
+
+echo "All commits successfully resigned, old branch replaced and force-pushed."