Husky pre-commit hook, that will lint or check only staged changes using biomejs.

husky_pre-commit

#!/usr/bin/env sh

# get staged file names
unstaged_files=$(git diff --name-only)
staged_files=$(git diff --cached --name-only)

err_output=""
# check each staged file via biome check
# @see https://biomejs.dev/reference/cli/
for file in $staged_files; do
    # check if file is also unstaged
    if echo "$unstaged_files" | grep -q "$file"; then
        # check only staged content with lint
        file_content=$(git show ":$file")
        err_output="$err_output"`echo "$file_content" | ./node_modules/.bin/biome lint --no-errors-on-unmatched --stdin-file-path="$file" 2>&1 > /dev/null`
        continue
    fi

    # make full check when file is only staged
    check_output=`./node_modules/.bin/biome check --no-errors-on-unmatched "$file" 2>&1`
    if [ $? -ne 0 ]; then
        err_output="$err_output$check_output"
    fi
done

if [ -n "$err_output" ]; then
    echo "$err_output"
    exit 1
fi