ci: fix lint script (#17080)

scripts/go-lint-all.bash

@@ -14,27 +14,24 @@ lint_module() {
 }
 export -f lint_module
 
-lint_files() {
-  local go_files="$(git diff --name-only --diff-filter=d | grep \.go$ | grep -v \.pb\.go$)"
-  if [[ -z "$go_files" && $GIT_DIFF ]]; then
-    go_files="$(echo $GIT_DIFF | grep \.go$ | grep -v \.pb\.go$)"
-  elif [[ -z "$go_files" ]]; then
-    echo "no files to lint"
-    exit 0
-  fi
-
-  for f in $go_files; do
-    local dir_name="$(dirname $f)"
-    echo "linting ${dir_name} [$(date -Iseconds -u)]"
-    golangci-lint run "${dir_name}" -c "${REPO_ROOT}/.golangci.yml" "$@"
-  done
-}
-export -f lint_files
-
 # if LINT_DIFF env is set, only lint the files in the current commit otherwise lint all files
 if [[ -z "${LINT_DIFF:-}" ]]; then
   find "${REPO_ROOT}" -type f -name go.mod -print0 |
     xargs -0 -I{} bash -c 'lint_module "$@"' _ {} "$@"
 else
-  lint_files "$@"
+  if [[ -z $GIT_DIFF ]]; then
+    GIT_DIFF=$(git diff --name-only --diff-filter=d | grep \.go$ | grep -v \.pb\.go$) || true
+  fi
+
+  if [[ -z "$GIT_DIFF" ]]; then
+    echo "no files to lint"
+    exit 0
+  fi
+
+  for f in $(dirname $(echo "$GIT_DIFF" | tr -d "'") | uniq); do
+    echo "linting $f [$(date -Iseconds -u)]" &&
+    cd $f &&
+    golangci-lint run ./... -c "${REPO_ROOT}/.golangci.yml" "$@" &&
+    cd $REPO_ROOT
+  done
 fi