fix: normalize inputs

entrypoint.sh

@@ -160,6 +160,29 @@ trim_whitespace() {
   printf '%s' "${value}"
 }
 
+# GitHub Actions usually exports every input env var, even when empty. Direct
+# docker execution does not, so normalize optional inputs before `set -u`
+# references later in the script.
+: "${INPUT_REPOSITORY:=}"
+: "${INPUT_REPOSITORY_PATH:=.}"
+: "${INPUT_SOURCE_BRANCH:=}"
+: "${INPUT_TARGET_BRANCH:=master}"
+: "${INPUT_TITLE:=}"
+: "${INPUT_TEMPLATE:=}"
+: "${INPUT_BODY:=}"
+: "${INPUT_REVIEWER:=}"
+: "${INPUT_ASSIGNEE:=}"
+: "${INPUT_LABEL:=}"
+: "${INPUT_MILESTONE:=}"
+: "${INPUT_DRAFT:=false}"
+: "${INPUT_OLD_STRING:=}"
+: "${INPUT_NEW_STRING:=}"
+: "${INPUT_GET_DIFF:=false}"
+: "${INPUT_IGNORE_USERS:=dependabot}"
+: "${INPUT_ALLOW_NO_DIFF:=false}"
+: "${INPUT_MAX_BODY_BYTES:=65000}"
+: "${INPUT_MAX_DIFF_LINES:=0}"
+
 append_csv_arg() {
   local flag="$1"
   local csv_value="$2"

tests/unit/test_optional_inputs_defaults.sh

@@ -0,0 +1,166 @@
+#!/usr/bin/env bash
+
+set -Eeuo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+SCRIPT_PATH="${SCRIPT_DIR}/../../entrypoint.sh"
+TMP_DIR="$(mktemp -d)"
+trap 'rm -rf "${TMP_DIR}"' EXIT
+
+assert_contains() {
+  local file_path="$1"
+  local expected="$2"
+  if ! grep -Fq -- "${expected}" "${file_path}"; then
+    echo "Assertion failed. Expected to find: ${expected}" >&2
+    echo "----- FILE CONTENT -----" >&2
+    cat "${file_path}" >&2
+    exit 1
+  fi
+}
+
+mkdir -p "${TMP_DIR}/bin"
+mkdir -p "${TMP_DIR}/repo"
+
+cat > "${TMP_DIR}/bin/git" <<'EOF'
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+args=("$@")
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "-C" ]]; then
+  args=("${args[@]:2}")
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "config" && "${args[1]}" == "--global" ]]; then
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 1 && "${args[0]}" == "config" ]]; then
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "remote" && "${args[1]}" == "set-url" ]]; then
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 1 && "${args[0]}" == "fetch" ]]; then
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "rev-parse" && "${args[1]}" == "--is-inside-work-tree" ]]; then
+  echo "true"
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "show-ref" ]]; then
+  last_arg="${args[$((${#args[@]} - 1))]}"
+  if [[ "${last_arg}" == "refs/remotes/origin/test-branch" || "${last_arg}" == "refs/remotes/origin/master" ]]; then
+    exit 0
+  fi
+  exit 1
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "rev-parse" ]]; then
+  last_arg="${args[$((${#args[@]} - 1))]}"
+  if [[ "${last_arg}" == "origin/test-branch" ]]; then
+    echo "bbb222"
+    exit 0
+  fi
+  if [[ "${last_arg}" == "origin/master" ]]; then
+    echo "aaa111"
+    exit 0
+  fi
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "diff" && "${args[1]}" == "--quiet" ]]; then
+  exit 1
+fi
+
+if [[ "${#args[@]}" -ge 1 && "${args[0]}" == "diff" ]]; then
+  echo "M README.md"
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 1 && "${args[0]}" == "log" ]]; then
+  echo "stub log"
+  exit 0
+fi
+
+if [[ "${#args[@]}" -ge 2 && "${args[0]}" == "symbolic-ref" ]]; then
+  echo "test-branch"
+  exit 0
+fi
+
+echo "Unsupported git call: $*" >&2
+exit 1
+EOF
+
+cat > "${TMP_DIR}/bin/gh" <<'EOF'
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+cmd="$*"
+
+if [[ "$#" -ge 1 && "$1" == "api" ]]; then
+  if [[ "${cmd}" == *"repos/owner/repo/pulls?state=open&base=master"* ]]; then
+    echo "[]"
+    exit 0
+  fi
+  if [[ "${cmd}" == *"repos/owner/repo/pulls/"* ]]; then
+    echo "https://example.test/pr/123"
+    exit 0
+  fi
+fi
+
+if [[ "$#" -ge 2 && "$1" == "pr" && "$2" == "create" ]]; then
+  echo "https://example.test/pr/123"
+  exit 0
+fi
+
+if [[ "$#" -ge 2 && "$1" == "pr" && "$2" == "view" ]]; then
+  echo "123"
+  exit 0
+fi
+
+echo "Unsupported gh call: $*" >&2
+exit 1
+EOF
+
+chmod +x "${TMP_DIR}/bin/git" "${TMP_DIR}/bin/gh"
+
+cat > "${TMP_DIR}/template.md" <<'EOF'
+Automated end-to-end test.
+<!-- Diff commits - START -->
+<!-- Diff commits - END -->
+<!-- Diff files - START -->
+<!-- Diff files - END -->
+EOF
+
+LOG_FILE="${TMP_DIR}/run.log"
+set +e
+PATH="${TMP_DIR}/bin:${PATH}" \
+GITHUB_ACTOR="ci-user" \
+GITHUB_TOKEN="token" \
+GITHUB_REPOSITORY="owner/repo" \
+GITHUB_WORKSPACE="${TMP_DIR}" \
+GITHUB_OUTPUT="${TMP_DIR}/output.txt" \
+INPUT_GITHUB_TOKEN="token" \
+INPUT_SOURCE_BRANCH="test-branch" \
+INPUT_TITLE="test(pull-request): draft PR with diff - safe to close" \
+INPUT_BODY="$(cat "${TMP_DIR}/template.md")" \
+INPUT_GET_DIFF="true" \
+INPUT_DRAFT="true" \
+bash "${SCRIPT_PATH}" >"${LOG_FILE}" 2>&1
+STATUS="$?"
+set -e
+
+if [[ "${STATUS}" != "0" ]]; then
+  echo "Expected successful execution with omitted optional inputs" >&2
+  cat "${LOG_FILE}" >&2
+  exit 1
+fi
+
+assert_contains "${LOG_FILE}" "template: "
+assert_contains "${LOG_FILE}" "Creating pull request"
+assert_contains "${TMP_DIR}/output.txt" "pr_number=123"
+
+echo "Optional input defaults test passed."