replace flake8 with ruff

.flake8

@@ -1,30 +0,0 @@
-[flake8]
-ignore =
-    # E501 line too long
-    E501,
-    # W391 newlines at EOF
-    W391,
-    # E241 multiple spaces after comma
-    E241,
-    # E302 expected 2 newlines
-    E302,
-    # W503 line break before binary operator (to be deprecated)
-    W503,
-    # E265 block comment should start with '# '
-    E265,
-    # E123 closing bracket does not match indentation of opening bracket's line
-    E123,
-    # E124 closing bracket does not match visual indentation
-    E124,
-    # E221 multiple spaces before operator
-    E221,
-    # E201 whitespace after '['
-    E201,
-#    # E741 ambiguous variable name 'I'
-#    E741,
-
-
-per-file-ignores =
-    # F401 import without use
-    */__init__.py: F401,
-    __init__.py: F401,

pyproject.toml

@@ -56,3 +56,37 @@ dependencies = [
 
 [tool.hatch.version]
 path = "klamath/__init__.py"
+
+
+[tool.ruff]
+exclude = [
+    ".git",
+    "dist",
+    ]
+line-length = 145
+indent-width = 4
+lint.dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+lint.select = [
+    "NPY", "E", "F", "W", "B", "ANN", "UP", "SLOT", "SIM", "LOG",
+    "C4", "ISC", "PIE", "PT", "RET", "TCH", "PTH", "INT",
+    "ARG", "PL", "R", "TRY",
+    "G010", "G101", "G201", "G202",
+    "Q002", "Q003", "Q004",
+    ]
+lint.ignore = [
+    #"ANN001",   # No annotation
+    "ANN002",   # *args
+    "ANN003",   # **kwargs
+    "ANN401",   # Any
+    "ANN101",   # self: Self
+    "SIM108",   # single-line if / else assignment
+    "RET504",   # x=y+z; return x
+    "PIE790",   # unnecessary pass
+    "ISC003",   # non-implicit string concatenation
+    "C408",     # dict(x=y) instead of {'x': y}
+    "PLR09",    # Too many xxx
+    "PLR2004",  # magic number
+    "PLC0414",  # import x as x
+    "TRY003",   # Long exception message
+    ]
+