gen_diff.sh

#!/bin/bash
# gen_diff.sh
# Generates a diff between the current LlamaFactory and the upstream base commit.
# Output: llamafactory_changes.diff in the repo root.
#
# Usage: bash gen_diff.sh

set -e

REPO_ROOT="$(cd "$(dirname "$0")" && pwd)"
LF_DIR="$REPO_ROOT/LlamaFactory"
OUTPUT="$REPO_ROOT/llamafactory_changes.diff"
UPSTREAM_URL="https://github.com/hiyouga/LLaMA-Factory.git"
BASE_COMMIT="92fa3df4c4e4e338ecc1cbdc6530b118337286e3"

TMPDIR=$(mktemp -d)
trap "rm -rf '$TMPDIR'" EXIT

echo "Fetching upstream at $BASE_COMMIT..."
git init "$TMPDIR/repo" -q
git -C "$TMPDIR/repo" fetch --depth 1 "$UPSTREAM_URL" "$BASE_COMMIT" -q
git -C "$TMPDIR/repo" checkout FETCH_HEAD -q

# Diff original vs current LlamaFactory
diff -r \
    --exclude='__pycache__' \
    --exclude='*.pyc' \
    --exclude='.git' \
    "$TMPDIR/repo" "$LF_DIR" > "$OUTPUT" || true

echo "Saved to $OUTPUT ($(wc -l < "$OUTPUT") lines)"