ci: add ruff to lint process (#908)

pyproject.toml

@@ -51,6 +51,7 @@ twine = '^5.1.1'
 semver = '^3.0.0'
 setuptools-scm = '^8.0.0'
 debugpy = '^1.6.6'
+ruff = '>=0.7.0'
 
 [tool.black]
 line-length = 88

src/syrupy/extensions/base.py

@@ -255,6 +255,10 @@ def _get_file_basename(
         return test_location.basename
 
 
+def _count_leading_whitespace(s: str) -> int:
+    return len(s) - len(s.lstrip())
+
+
 class SnapshotReporter(ABC):
     _context_line_count = 1
 
@@ -383,16 +387,13 @@ def __limit_context(self, lines: List[str]) -> Iterator[str]:
         num_lines = len(lines)
         if num_lines:
             if num_lines > self._context_line_max:
-                count_leading_whitespace: Callable[[str], int] = lambda s: len(s) - len(
-                    s.lstrip()
-                )
                 if self._context_line_count:
                     num_space = (
-                        count_leading_whitespace(lines[self._context_line_count - 1])
-                        + count_leading_whitespace(lines[-self._context_line_count])
+                        _count_leading_whitespace(lines[self._context_line_count - 1])
+                        + _count_leading_whitespace(lines[-self._context_line_count])
                     ) // 2
                 else:
-                    num_space = count_leading_whitespace(lines[num_lines // 2])
+                    num_space = _count_leading_whitespace(lines[num_lines // 2])
                 yield " " * num_space + self._marker_context_max
             if self._context_line_count and num_lines > 1:
                 yield from lines[-self._context_line_count :]  # noqa: E203

tasks/benchmark.py

@@ -7,4 +7,4 @@ def benchmark(ctx, report=False):
     Run and generate benchmarks for current code
     """
 
-    ctx.run(f"pytest benchmarks --benchmark-json=benchmarks.json")
+    ctx.run("pytest benchmarks --benchmark-json=benchmarks.json")

tasks/build.py

@@ -12,10 +12,10 @@ def install(ctx, upgrade=False):
     Install dependencies and update lock file.
     """
     if upgrade:
-        ctx_run(ctx, f"poetry update")
+        ctx_run(ctx, "poetry update")
     else:
-        ctx_run(ctx, f"poetry lock")
-        ctx_run(ctx, f"poetry install")
+        ctx_run(ctx, "poetry lock")
+        ctx_run(ctx, "poetry install")
 
 
 @task

tasks/lint.py

@@ -10,6 +10,7 @@
     "black": lambda fix: f"python -m black {'' if fix else '--check'} .",
     "flake8": lambda _: "python -m flake8 src tests benchmarks *.py",
     "mypy": lambda _: "python -m mypy --strict src benchmarks",
+    "ruff": lambda _: "python -m ruff check",
 }
 
 

tasks/test.py

@@ -1,5 +1,3 @@
-import os
-
 from invoke import task
 
 from .utils import ctx_run