From 992901c2013389caa8a96a445484a27dd72f11d4 Mon Sep 17 00:00:00 2001
From: Amin Sadeghi <amin.sadeghi@live.com>
Date: Thu, 4 Apr 2024 14:40:34 -0400
Subject: [PATCH 1/4] First try at implementing only-apply-to-changed-files

---
 action.yml     | 9 +++++++++
 action/main.py | 7 ++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/action.yml b/action.yml
index 4956cbc..ef2ecfc 100644
--- a/action.yml
+++ b/action.yml
@@ -16,12 +16,20 @@ inputs:
     description: 'The version of ruff to use, e.g. "0.0.259"'
     required: false
     default: ""
+  changed-files:
+    description: 'Whether to only run ruff on changed files. Default: false'
+    required: false
+    default: "false"
 branding:
   color: "black"
   icon: "code"
 runs:
   using: composite
   steps:
+    - name: Get changed files
+      id: changed-files
+      if: ${{ inputs.changed-files == 'true' }}
+      uses: tj-actions/changed-files@v44
     - run: |
         if [ "$RUNNER_OS" == "Windows" ]; then
           python $GITHUB_ACTION_PATH/action/main.py
@@ -33,5 +41,6 @@ runs:
         INPUT_ARGS: ${{ inputs.args }}
         INPUT_SRC: ${{ inputs.src }}
         INPUT_VERSION: ${{ inputs.version }}
+        CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
         pythonioencoding: utf-8
       shell: bash
diff --git a/action/main.py b/action/main.py
index 1e0e74f..14a3e5f 100644
--- a/action/main.py
+++ b/action/main.py
@@ -11,6 +11,7 @@ ACTION_PATH = Path(os.environ["GITHUB_ACTION_PATH"])
 ARGS = os.getenv("INPUT_ARGS", default="")
 SRC = os.getenv("INPUT_SRC", default="")
 VERSION = os.getenv("INPUT_VERSION", default="")
+CHANGED_FILES = os.getenv("CHANGED_FILES", "")
 
 version_specifier = ""
 if VERSION != "":
@@ -21,6 +22,10 @@ if VERSION != "":
 
 req = f"ruff{version_specifier}"
 
-proc = run(["pipx", "run", req, *shlex.split(ARGS), *shlex.split(SRC)])
+# If CHANGED_FILES is not empty, split it into a list; otherwise, use SRC
+files_to_check = shlex.split(CHANGED_FILES or SRC)
+
+proc = run(["pipx", "run", req, *shlex.split(ARGS), *files_to_check])
+# proc = run(["pipx", "run", req, *shlex.split(ARGS), *shlex.split(SRC)])
 
 sys.exit(proc.returncode)

From a9c46eeb9c58f2bfad37d09ca7c4768ff435d747 Mon Sep 17 00:00:00 2001
From: Amin Sadeghi <amin.sadeghi@live.com>
Date: Thu, 4 Apr 2024 14:53:05 -0400
Subject: [PATCH 2/4] Exclude non-Python files

---
 action/main.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/action/main.py b/action/main.py
index 14a3e5f..f7b23fb 100644
--- a/action/main.py
+++ b/action/main.py
@@ -24,8 +24,9 @@ req = f"ruff{version_specifier}"
 
 # If CHANGED_FILES is not empty, split it into a list; otherwise, use SRC
 files_to_check = shlex.split(CHANGED_FILES or SRC)
+# Exclude non-Python files
+files_to_check = [f for f in files_to_check if f.endswith(".py")]
 
 proc = run(["pipx", "run", req, *shlex.split(ARGS), *files_to_check])
-# proc = run(["pipx", "run", req, *shlex.split(ARGS), *shlex.split(SRC)])
 
 sys.exit(proc.returncode)

From 0df4a956866f879b088ff34d6a0f0313e4e35dbc Mon Sep 17 00:00:00 2001
From: Amin Sadeghi <amin.sadeghi@live.com>
Date: Thu, 4 Apr 2024 15:25:49 -0400
Subject: [PATCH 3/4] Exclude non-Python files as part of changed-files action

---
 action.yml     | 2 ++
 action/main.py | 2 --
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/action.yml b/action.yml
index ef2ecfc..c27cf39 100644
--- a/action.yml
+++ b/action.yml
@@ -30,6 +30,8 @@ runs:
       id: changed-files
       if: ${{ inputs.changed-files == 'true' }}
       uses: tj-actions/changed-files@v44
+      with:
+        files: '**.py'
     - run: |
         if [ "$RUNNER_OS" == "Windows" ]; then
           python $GITHUB_ACTION_PATH/action/main.py
diff --git a/action/main.py b/action/main.py
index f7b23fb..e91719e 100644
--- a/action/main.py
+++ b/action/main.py
@@ -24,8 +24,6 @@ req = f"ruff{version_specifier}"
 
 # If CHANGED_FILES is not empty, split it into a list; otherwise, use SRC
 files_to_check = shlex.split(CHANGED_FILES or SRC)
-# Exclude non-Python files
-files_to_check = [f for f in files_to_check if f.endswith(".py")]
 
 proc = run(["pipx", "run", req, *shlex.split(ARGS), *files_to_check])
 

From 79eabade5419b7a0d74dca0819dc09b201e6f281 Mon Sep 17 00:00:00 2001
From: Amin Sadeghi <amin.sadeghi@live.com>
Date: Thu, 4 Apr 2024 15:34:23 -0400
Subject: [PATCH 4/4] Document `changed-files` keyword in README

---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index 815919e..78527f0 100644
--- a/README.md
+++ b/README.md
@@ -52,3 +52,10 @@ See [Configuring Ruff](https://github.com/astral-sh/ruff/blob/main/docs/configur
   with:
     args: 'format --check'
 ```
+
+### Only run ruff on changed files
+```yaml
+- uses: chartboost/ruff-action@v1
+  with:
+    changed-files: 'true'
+```