Pre-commit git hook for Helm charts - it does not allow you to commit without changing the version in Chart.yaml

pre-commit.sh

#!/bin/bash
set -e

#####################################################
## TO INSTALL THIS GIT HOOK:                       ##
## touch .git/hooks/pre-commit                     ##
## echo '!/bin/sh'> .git/hooks/pre-commit          ##
## echo './pre-commit.sh' >> .git/hooks/pre-commit ##
## chmod +x pre-commit.sh .git/hooks/pre-commit    ##
#####################################################

# Function to check if Chart.yaml file has been updated
function check_chart_version {
  local dir="$1"
  local chart_file="$dir/Chart.yaml"

  if [[ -f "$chart_file" ]]; then
    # Check if any file in the chart directory or its subdirectories has changed
    if git diff --cached --name-only | grep -q "^$dir/"; then
      # Check if Chart.yaml is in the list of changed files
      if ! git diff --cached --name-only | grep -q "^$chart_file$"; then
        echo "Error: You must update the Helm chart version in $chart_file"
        exit 1
      fi
    fi
  fi
}

# Get the list of changed files
changed_files=$(git diff --cached --name-only)

# Extract the unique chart directories that contain changes
changed_chart_dirs=$(echo "$changed_files" | grep '^charts/' | awk -F'/' '{print $1"/"$2}' | sort -u)

# Check each chart directory for version update
for dir in $changed_chart_dirs; do
  check_chart_version "$dir"
done

The folder structure looks like this:

├── helm-repository
│   └── charts
│       ├── authentication
│       │   └── charts
│       ├── cluster-cert-manager
│       ├── cluster-efs
│       │   └── templates
│       ├── cluster-ingress
│       │   └── templates
│       ├── cluster-ldap
│       │   └── templates
│       ├── cluster-ldap-sync
│       │   └── templates
│       ├── cluster-logging
│       │   └── templates
│       ├── cluster-seed
│       │   └── templates
│       ├── collectord
│       │   └── charts
│       ├── compliance-operator-full-stack
│       │   └── templates
│       │       └── compliance
│       ├── gitops-application-argocd
│       │   └── templates
│       ├── gitops-linker-app
│       │   └── templates
│       ├── gitops-linker-team
│       │   └── templates
│       ├── gitops-payload
│       │   └── templates
│       ├── helper-operator
│       │   └── templates
│       │       ├── jobs
│       │       └── operators
│       ├── helper-status-checker
│       │   └── templates
│       ├── monitoring
│       │   └── charts
│       ├── namespaces
│       │   └── templates
│       ├── test-app
│       │   └── templates
│       └── vault
│           ├── scripts
│           └── templates
│               └── tests