check-esm-only.sh

#!/bin/bash

# Get the list of dependencies from package.json
DEPENDENCIES=$(jq -r '.dependencies | keys[]' package.json)

# Loop through each dependency
for DEP in $DEPENDENCIES; do
    # Get the path to the dependency's package.json
    DEP_PACKAGE_JSON="node_modules/$DEP/package.json"

    # Check if the dependency's package.json exists
    if [ -f "$DEP_PACKAGE_JSON" ]; then
        # Get the type field from the dependency's package.json
        TYPE=$(jq -r '.type // "not specified"' "$DEP_PACKAGE_JSON")
        
        # Check if type is module
        if [ "$TYPE" == "module" ]; then
            # Check if exports['.'].require does not exist
            EXPORTS_REQUIRE_EXISTS=$(jq -r 'if (.exports | type == "object") and .exports["."] and .exports["."].require then "exists" else "not exists" end' "$DEP_PACKAGE_JSON")
            
            if [ "$EXPORTS_REQUIRE_EXISTS" == "not exists" ]; then
                echo "Dependency: $DEP is ESM only"
            fi
        fi
    else
        echo "Dependency: $DEP, package.json not found!"
    fi
done