pre-commit hook for larger files

pre-commit

#!/bin/bash

GIT_DIR=$(git rev-parse --show-toplevel)

# Check if the file or any of its parent directories matches any patterns in gitignore
is_ignored_by_git() {
    # Check if the file is ignored using Git's own check-ignore command
    git -C "$GIT_DIR" check-ignore -q "$1"
    return $?
}

# Use the -print0 option with find to handle spaces in file names correctly
find "$GIT_DIR" -type f -size +50M -print0 | while IFS= read -r -d $'\0' FILE; do
    # Normalize path (remove leading GIT_DIR and './' from find)
    FILE="${FILE#"$GIT_DIR/"}"
    FILE="${FILE#./}"

    # If the file doesn't match any pattern in gitignore (and isn't ignored already), add it
    if ! is_ignored_by_git "$FILE"; then
        echo "Adding $FILE to .gitignore"
        echo "$FILE" >> "$GIT_DIR/.gitignore"
    fi
done

Here's a step-by-step guide for setting up a Git template with your pre-commit script:

---

Setting Up a Git Template with a Custom pre-commit Hook

1. Create a Template Directory

First, we need a directory that will act as our template. This directory will contain the custom hooks and other configurations that we want to be copied to every new Git repository.

mkdir ~/git-template

2. Add the pre-commit Script

Navigate to the hooks directory inside the template directory and create the pre-commit script with the desired content.

cd ~/git-template
mkdir hooks
nano hooks/pre-commit

Paste the following content into the pre-commit script:

#!/bin/bash

GIT_DIR=$(git rev-parse --show-toplevel)

# Check if the file or any of its parent directories matches any patterns in gitignore
is_ignored_by_git() {
    # Check if the file is ignored using Git's own check-ignore command
    git -C "$GIT_DIR" check-ignore -q "$1"
    return $?
}

# Use the -print0 option with find to handle spaces in file names correctly
find "$GIT_DIR" -type f -size +50M -print0 | while IFS= read -r -d $'\0' FILE; do
    # Normalize path (remove leading GIT_DIR and './' from find)
    FILE="${FILE#"$GIT_DIR/"}"
    FILE="${FILE#./}"

    # If the file doesn't match any pattern in gitignore (and isn't ignored already), add it
    if ! is_ignored_by_git "$FILE"; then
        echo "Adding $FILE to .gitignore"
        echo "$FILE" >> "$GIT_DIR/.gitignore"
    fi
done

Save and exit the editor (for nano, press CTRL + X, then Y, then Enter).

3. Make the Script Executable

Ensure that the pre-commit script is executable:

chmod +x hooks/pre-commit

4. Configure Git to Use the Template Directory

Now, we'll tell Git to use our custom template directory whenever we initialize a new repository:

git config --global init.templateDir '~/git-template'

5. Test the Template

To test if everything is set up correctly, create a new Git repository and check if the pre-commit hook has been copied:

mkdir test-repo
cd test-repo
git init
ls .git/hooks

You should see the pre-commit script listed in the hooks directory of the new repository.