#!/bin/bash
# Calculate dependency hash for Docker cache tag
# This script calculates the hash used for the build cache image tag

# Calculate hash of go.mod + go.sum
# Use shasum on macOS, sha256sum on Linux
if command -v sha256sum >/dev/null 2>&1; then
    DEPS_HASH=$(sha256sum go.mod go.sum | sha256sum | cut -d' ' -f1 | head -c 12)
else
    DEPS_HASH=$(shasum -a 256 go.mod go.sum | shasum -a 256 | cut -d' ' -f1 | head -c 12)
fi

echo "Dependency hash: $DEPS_HASH"
echo "$DEPS_HASH"

# Export for use in other scripts
if [ -n "$1" ]; then
    echo "DEPS_HASH=$DEPS_HASH" > "$1"
    echo "Exported to: $1"
fi