chore: improve project checks

Makefile

@@ -1,12 +1,16 @@
-.PHONY: all check lint test format
+.PHONY: all check format format-check lint test
 
-check: format lint test
-
-test:
-	@scripts/test
-
-lint:
-	@scripts/lint
+all: format check
+check: format-check lint test
 
 format:
-	@stylua .
+	@stylua $(or $(FILES),.)
+
+format-check:
+	@stylua --check $(or $(FILES),.)
+
+lint:
+	@scripts/lint $(FILES)
+
+test:
+	@scripts/test $(FILES)

scripts/lint

@@ -3,15 +3,55 @@ set -uo pipefail
 
 cd "$(dirname "$0")/.." || exit 1
 
-emmylua_check --warnings-as-errors --output-format=json . 2> >(grep -v '^Check finished$' >&2) \
-    | jq -r '
+filter='.'
+if [[ $# -gt 0 ]]; then
+    files_json=$(printf '%s\n' "$@" | jq -R -s 'split("\n")[:-1]')
+    read -r -d "" filter <<'jq'
+def selected($path; $rel):
+    any($files[]; . as $target
+        | ($target | sub("/+$"; "") | sub("^\\./"; "")) as $clean
+        | (if $clean | startswith("/") then $clean else $cwd + "/" + $clean end) as $abs
+        | $path == $clean
+            or $rel == $clean
+            or $path == $abs
+            or ($rel | startswith($clean + "/"))
+            or ($path | startswith($abs + "/"))
+    );
+map(
+    .file as $f
+    | ($f | sub("^" + $cwd + "/"; "")) as $rel
+    | select(selected($f; $rel))
+)
+jq
+fi
+
+json=$(emmylua_check --warnings-as-errors --output-format=json . 2> >(grep -v '^Check finished$' >&2))
+check_status=$?
+if ! jq -e type >/dev/null <<<"$json"; then
+    if [[ $check_status -ne 0 ]]; then
+        exit "$check_status"
+    fi
+    exit 1
+fi
+if ! filtered=$(jq --arg cwd "$PWD" --argjson files "${files_json:-[]}" "$filter" <<<"$json"); then
+    exit 1
+fi
+
+jq -r '
         .[]
         | .file as $f
         | .diagnostics[]
         | "\($f):\(.range.start.line + 1):\(.range.start.character + 1)"
           + ": \(["error","warning","info","hint"][.severity-1])"
           + ": \(.message | rtrimstr(" ")) [\(.code)]"
-    ' \
+    ' <<<"$filtered" \
     | sed "s|^$PWD/||"
 
-exit "${PIPESTATUS[0]}"
+if [[ $# -gt 0 ]]; then
+    if jq -e 'any(.[]?.diagnostics[]?; .severity <= 2)' >/dev/null <<<"$filtered"; then
+        exit 1
+    fi
+    exit 0
+fi
+
+exit "$check_status"