diff --git a/Dockerfile b/Dockerfile
index bfa4b1e..f8b72ed 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,7 @@ COPY requirements.txt /requirements.txt
 RUN apt update && \
     DEBIAN_FRONTEND=noninteractive \
     apt-get install -y --no-install-recommends\
+    build-essential cmake git \
     tzdata \
     clang-tidy-6.0 \
     clang-tidy-7 \
@@ -18,6 +19,5 @@ RUN apt update && \
     pip3 install -r requirements.txt
 
 COPY review.py /review.py
-COPY entrypoint.sh /entrypoint.sh
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["/review.py"]
diff --git a/README.md b/README.md
index d51a94b..8b24748 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,11 @@ start-up in order to build the Docker container. If you need to
 install some additional packages you can pass them via the
 `apt_packages` argument.
 
+Except for very simple projects, a `compile_commands.json` file is necessary for
+clang-tidy to find headers, set preprocessor macros, and so on. You can generate
+one as part of this Action by setting `cmake_command` to something like `cmake
+. -B build -DCMAKE_EXPORT_COMPILE_COMMANDS=on`.
+
 GitHub only mounts the `GITHUB_WORKSPACE` directory (that is, the
 default place where it clones your repository) on the container. If
 you install additional libraries/packages yourself, you'll need to
@@ -71,12 +76,18 @@ at once, so `clang-tidy-review` will only attempt to post the first
   - default: '11'
 - `clang_tidy_checks`: List of checks
   - default: `'-*,performance-*,readability-*,bugprone-*,clang-analyzer-*,cppcoreguidelines-*,mpi-*,misc-*'`
+- `config_file`: Path to clang-tidy config file. If set, the config file is used
+  instead of `clang_tidy_checks`
+  - default: ''
 - `include`: Comma-separated list of files or patterns to include
   - default: `"*.[ch],*.[ch]xx,*.[ch]pp,*.[ch]++,*.cc,*.hh"`
 - `exclude`: Comma-separated list of files or patterns to exclude
   - default: ''
 - `apt_packages`: Comma-separated list of apt packages to install
   - default: ''
+- `cmake_command`: A CMake command to configure your project and generate
+  `compile_commands.json` in `build_dir`
+  - default: ''
 - `max_comments`: Maximum number of comments to post at once
   - default: '25'
 
diff --git a/action.yml b/action.yml
index b5ad342..8afde12 100644
--- a/action.yml
+++ b/action.yml
@@ -37,6 +37,10 @@ inputs:
     description: 'Comma-separated list of apt packages to install'
     required: false
     default: ''
+  cmake_command:
+    description: 'If set, run CMake as part of the action using this command'
+    required: false
+    default: ''
   max_comments:
     description: 'Maximum number of comments to post at once'
     required: false
@@ -62,3 +66,4 @@ runs:
     - --include='${{ inputs.include }}'
     - --exclude='${{ inputs.exclude }}'
     - --apt-packages=${{ inputs.apt_packages }}
+    - --cmake-command='${{ inputs.cmake_command }}'
diff --git a/review.py b/review.py
index 782aa83..81978a7 100755
--- a/review.py
+++ b/review.py
@@ -6,6 +6,7 @@
 # See LICENSE for more information
 
 import argparse
+import contextlib
 import datetime
 import itertools
 import fnmatch
@@ -24,6 +25,15 @@
 DIFF_HEADER_LINE_LENGTH = 5
 
 
+@contextlib.contextmanager
+def message_group(title: str):
+    print(f"::group::{title}", flush=True)
+    try:
+        yield
+    finally:
+        print("::endgroup::", flush=True)
+
+
 def make_file_line_lookup(diff):
     """Get a lookup table for each file in diff, to convert between source
     line number to line number in the diff
@@ -157,13 +167,13 @@ def get_clang_tidy_warnings(
     print(f"Using config: {config}")
 
     command = f"{clang_tidy_binary} -p={build_dir} {config} -line-filter={line_filter} {files}"
-    print(f"Running:\n\t{command}")
 
     start = datetime.datetime.now()
     try:
-        output = subprocess.run(
-            command, capture_output=True, shell=True, check=True, encoding="utf-8"
-        )
+        with message_group(f"Running:\n\t{command}"):
+            output = subprocess.run(
+                command, capture_output=True, shell=True, check=True, encoding="utf-8"
+            )
     except subprocess.CalledProcessError as e:
         print(
             f"\n\nclang-tidy failed with return code {e.returncode} and error:\n{e.stderr}\nOutput was:\n{e.stdout}"
@@ -301,6 +311,18 @@ def main(
     pull_request.create_review(**trimmed_review)
 
 
+def strip_enclosing_quotes(string: str) -> str:
+    """Strip leading/trailing whitespace and remove any enclosing quotes"""
+    stripped = string.strip()
+
+    # Need to check double quotes again in case they're nested inside
+    # single quotes
+    for quote in ['"', "'", '"']:
+        if stripped.startswith(quote) and stripped.endswith(quote):
+            stripped = stripped[1:-1]
+    return stripped
+
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(
         description="Create a review from clang-tidy warnings"
@@ -342,6 +364,12 @@ def main(
         type=str,
         default="",
     )
+    parser.add_argument(
+        "--cmake-command",
+        help="If set, run CMake as part of the action with this command",
+        type=str,
+        default="",
+    )
     parser.add_argument(
         "--max-comments",
         help="Maximum number of comments to post at once",
@@ -356,22 +384,29 @@ def main(
     args = parser.parse_args()
 
     # Remove any enclosing quotes and extra whitespace
-    exclude = args.exclude.strip(""" "'""").split(",")
-    include = args.include.strip(""" "'""").split(",")
+    exclude = strip_enclosing_quotes(args.exclude).split(",")
+    include = strip_enclosing_quotes(args.include).split(",")
 
     if args.apt_packages:
         # Try to make sure only 'apt install' is run
         apt_packages = re.split(BAD_CHARS_APT_PACKAGES_PATTERN, args.apt_packages)[
             0
         ].split(",")
-        print("Installing additional packages:", apt_packages)
-        subprocess.run(
-            ["apt", "install", "-y", "--no-install-recommends"] + apt_packages
-        )
+        with message_group(f"Installing additional packages: {apt_packages}"):
+            subprocess.run(
+                ["apt", "install", "-y", "--no-install-recommends"] + apt_packages
+            )
 
     build_compile_commands = f"{args.build_dir}/compile_commands.json"
 
-    if os.path.exists(build_compile_commands):
+    # If we run CMake as part of the action, then we know the paths in
+    # the compile_commands.json file are going to be correct
+    if args.cmake_command:
+        cmake_command = strip_enclosing_quotes(args.cmake_command)
+        with message_group(f"Running cmake: {cmake_command}"):
+            subprocess.run(cmake_command, shell=True, check=True)
+
+    elif os.path.exists(build_compile_commands):
         print(f"Found '{build_compile_commands}', updating absolute paths")
         # We might need to change some absolute paths if we're inside
         # a docker container
@@ -381,7 +416,7 @@ def main(
         original_directory = compile_commands[0]["directory"]
 
         # directory should either end with the build directory,
-        # unless it's '.', in which case use all of directory
+        # unless it's '.', in which case use original directory
         if original_directory.endswith(args.build_dir):
             build_dir_index = -(len(args.build_dir) + 1)
             basedir = original_directory[:build_dir_index]