fix(uninstall): show the credential error under set -e

tests/test-uninstall-credentials.sh

@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+# Regression tests for verify_aws_credentials in uninstall.sh (issue #132).
+# When "aws sts get-caller-identity" fails, the function must show the
+# error output and a hint, and then exit 1. It must not stop with no message.
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+UNINSTALL="${UNINSTALL_OVERRIDE:-${ROOT}/uninstall.sh}"
+PASS=0
+FAIL=0
+
+pass() {
+  printf '✓ %s\n' "$1"
+  PASS=$((PASS + 1))
+}
+
+fail() {
+  printf '✗ %s\n' "$1" >&2
+  FAIL=$((FAIL + 1))
+}
+
+assert_contains() {
+  local name="$1" expected="$2" actual="$3"
+  if grep -Fq -- "$expected" <<< "$actual"; then
+    pass "$name"
+  else
+    fail "$name (missing: ${expected})"
+  fi
+}
+
+assert_status() {
+  local name="$1" expected="$2" actual="$3"
+  if [[ "$actual" -eq "$expected" ]]; then
+    pass "$name"
+  else
+    fail "$name (expected exit ${expected}, got ${actual})"
+  fi
+}
+
+# Run verify_aws_credentials in a child bash with the same "set -euo pipefail"
+# as uninstall.sh. The child loads the functions without the last line
+# (main "$@") and replaces aws with a fake.
+# $1 = scenario: not-set (no credentials) or expired (credentials, auth fails)
+#      or ok (sts call works).
+run_verify() {
+  local scenario="$1"
+  FAKE_SCENARIO="$scenario" UNINSTALL="$UNINSTALL" bash -c '
+    set -euo pipefail
+    # shellcheck disable=SC1090
+    source <(sed "\$d" "$UNINSTALL")
+    aws() {
+      case "${FAKE_SCENARIO}:$1:$2" in
+        ok:sts:get-caller-identity)
+          printf "{\"Account\": \"123456789012\"}\n" ;;
+        *:sts:get-caller-identity)
+          printf "FAKE-STS-ERROR: Unable to locate credentials\n" >&2
+          return 255 ;;
+        not-set:configure:list)
+          printf "access_key     <not set>   None   None\n" ;;
+        expired:configure:list)
+          printf "access_key     ****ABCD   shared-credentials-file\n" ;;
+        *)
+          return 1 ;;
+      esac
+    }
+    verify_aws_credentials
+    echo "VERIFY-RETURNED"
+  ' 2>&1
+}
+
+status=0
+out=$(run_verify not-set) || status=$?
+assert_status "missing credentials: exit 1" 1 "$status"
+assert_contains "missing credentials: shows sts error" "FAKE-STS-ERROR" "$out"
+assert_contains "missing credentials: shows configure hint" "Run 'aws configure' first" "$out"
+
+status=0
+out=$(run_verify expired) || status=$?
+assert_status "failed auth: exit 1" 1 "$status"
+assert_contains "failed auth: shows sts error" "FAKE-STS-ERROR" "$out"
+assert_contains "failed auth: shows refresh hint" "Refresh session" "$out"
+
+status=0
+out=$(run_verify ok) || status=$?
+assert_status "valid credentials: exit 0" 0 "$status"
+assert_contains "valid credentials: function returns" "VERIFY-RETURNED" "$out"
+
+printf '\n%d passed, %d failed\n' "$PASS" "$FAIL"
+[[ "$FAIL" -eq 0 ]]

uninstall.sh

@@ -48,9 +48,10 @@ require_cmd() { command -v "$1" &>/dev/null || fail "$2"; }
 # ============================================================================
 
 verify_aws_credentials() {
-  local sts_output sts_rc
-  sts_output=$(aws sts get-caller-identity 2>&1)
-  sts_rc=$?
+  local sts_output sts_rc=0
+  # Use "|| sts_rc=$?" so that set -e does not stop the script before the
+  # error output and the hint below are shown.
+  sts_output=$(aws sts get-caller-identity 2>&1) || sts_rc=$?
   if [[ $sts_rc -ne 0 ]]; then
     warn "aws sts get-caller-identity failed:"
     warn "$sts_output"