feat: add check-for-ignored script

Checks for ignored files that have been tracked by git.

Dockerfile

@@ -39,4 +39,6 @@ RUN rustup install nightly && rustup component add --toolchain nightly rustfmt c
 RUN git config --global user.email "action@git.kemitix.net" && \
   git config --global user.name "ForgeJo Action. See: https://git.kemitix.net/kemitix/rust"
 
+COPY scripts/ /usr/local/bin/
+
 WORKDIR /app

README.md

@@ -42,3 +42,18 @@ The available toolchain in the image are:
 - cargo-chef
 - cargo-hack
 - release-plz
+
+### Scripts
+
+- `check-for-ignored`
+
+Checks for files that are being tracked by Git but should be ignored according
+to the `.gitignore` file.
+
+#### Usage
+
+```yaml
+steps:
+  - name: Check for Ignored Files
+    run: check-for-ignored
+```

scripts/check-for-ignored

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# Exit on error
+set -e
+
+# Check if git is installed
+if ! command -v git &> /dev/null; then
+    echo "Error: git is not installed"
+    exit 1
+fi
+
+# Check if we're in a git repository
+if ! git rev-parse --is-inside-work-tree &> /dev/null; then
+    echo "Error: not in a git repository"
+    exit 1
+fi
+
+echo "Checking for tracked files that should be ignored..."
+
+# Find files that are both tracked and ignored
+ignored_files=$(git ls-files --cached -i --exclude-standard)
+
+if [[ -z "$ignored_files" ]]; then
+    echo "No tracked files are marked as ignored"
+    exit 0
+else
+    echo "The following tracked files are marked as ignored:"
+    echo "$ignored_files"
+    exit 1
+fi