refactor(cmake): CMake configuration files for improved readability

.github/workflows/ci.yml

@@ -116,6 +116,10 @@ jobs:
             exit -1
         fi
 
+    - name: cmake-format check
+      run: |
+        pre-commit run cmake-format -a
+
     - name: Build Docs
       working-directory: "cpp/build"
       run: |

.pre-commit-config.yaml

@@ -47,6 +47,11 @@ repos:
       types_or: [c++]
       args: [--style=file, --verbose]
       exclude: ^cpp/thirdparty/
+
+  - repo: https://github.com/cheshirekow/cmake-format-precommit
+    rev: v0.6.10
+    hooks:
+      - id: cmake-format
 
   - repo: https://github.com/pocc/pre-commit-hooks
     rev: v1.3.5

cmake-format.py

@@ -0,0 +1,74 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# cmake-format configuration file
+
+# -----------------------------
+# Options affecting formatting.
+# -----------------------------
+with section("format"):
+    # How wide to allow formatted cmake files
+    line_width = 90
+
+    # How many spaces to tab for indent
+    tab_size = 2
+
+    # If a positional argument group contains more than this many arguments,
+    # then force it to a vertical layout.
+    max_pargs_hwrap = 4
+
+    # If the statement spelling length (including space and parenthesis) is
+    # smaller than this amount, then force reject nested layouts.
+    # This value only comes into play when considering whether or not to nest
+    # arguments below their parent. If the number of characters in the parent
+    # is less than this value, we will not nest.
+    min_prefix_chars = 32
+
+    # If true, separate flow control names from their parentheses with a space
+    separate_ctrl_name_with_space = False
+
+    # If true, separate function names from parentheses with a space
+    separate_fn_name_with_space = False
+
+    # If a statement is wrapped to more than one line, than dangle the closing
+    # parenthesis on it's own line
+    dangle_parens = False
+
+    # What style line endings to use in the output.
+    line_ending = "unix"
+
+    # Format command names consistently as 'lower' or 'upper' case
+    command_case = "lower"
+
+    # Format keywords consistently as 'lower' or 'upper' case
+    keyword_case = "unchanged"
+
+# ------------------------------------------------
+# Options affecting comment reflow and formatting.
+# ------------------------------------------------
+with section("markup"):
+    # enable comment markup parsing and reflow
+    enable_markup = False
+
+    # If comment markup is enabled, don't reflow the first comment block in
+    # eachlistfile. Use this to preserve formatting of your
+    # copyright/licensestatements.
+    first_comment_is_literal = True
+
+    # If comment markup is enabled, don't reflow any comment block which
+    # matches this (regex) pattern. Default is `None` (disabled).
+    literal_comment_pattern = None