proposed postinstall routine for "collected" jsan

postinstall.sh

#!/bin/bash

#PODNAME: postinstall.sh

CURRENT_PKG_DIR=$(pwd)

NPM_ROOT=$(npm root 2>/dev/null)

ONE_UP_NPM_ROOT="$NPM_ROOT/../.."

mkdir -p "$NPM_ROOT"

mkdir -p "$NPM_ROOT/.jsan"
mkdir -p "$NPM_ROOT/.jsanver"

mkdir -p "$ONE_UP_NPM_ROOT/.jsan"
mkdir -p "$ONE_UP_NPM_ROOT/.jsanver"

print_key() {
	CONTENT=$(cat $1)
	KEY=$(node -e "($CONTENT).$2")
}

compare_versions() {
	CMP_RES=$(node -e "require('$CURRENT_PKG_DIR/__script/semver').compare('$1', '$2')")
}

# For node_modules within the current package

print_key ./package.json name
DIST_NAME=$KEY

DIST_VER_FILE="$NPM_ROOT/.jsanver/$DIST_NAME.json"
DIST_VER_TARB="$NPM_ROOT/.jsanver/$DIST_NAME.tar.gz"

print_key ./package.json version
GOING_TO_INSTALL=$KEY

if [ -e "$DIST_VER_FILE" ]
then
	print_key $DIST_VER_FILE version
	ALREADY_HAS=$KEY
	
	echo "Version file exists for: $DIST_VER_FILE, we have $ALREADY_HAS and installing $GOING_TO_INSTALL"
	
	compare_versions $ALREADY_HAS $GOING_TO_INSTALL
	
	if [ $CMP_RES -eq "1" ]
	then
		echo "Already have a newer version, skipping..."
	else 
        echo "Copying $DIST_NAME 'lib/*' to $NPM_ROOT/.jsan"
        cp -R ./lib/* "$NPM_ROOT/.jsan"

        echo "Copying $DIST_NAME.json to $NPM_ROOT/.jsanver"
        cp -R ./package.json $DIST_VER_FILE

        echo "Packing $DIST_NAME 'lib/*' to $NPM_ROOT/.jsanver/$DIST_NAME.tar.gz"
        tar -czf $DIST_VER_TARB ./lib/
	fi
else
    echo "Copying $DIST_NAME 'lib/*' to $NPM_ROOT/.jsan"
    cp -R ./lib/* "$NPM_ROOT/.jsan"

    echo "Copying $DIST_NAME.json to $NPM_ROOT/.jsanver"
    cp -R ./package.json $DIST_VER_FILE

    echo "Packing $DIST_NAME 'lib/*' to $NPM_ROOT/.jsanver/$DIST_NAME.tar.gz"
    tar -czf $DIST_VER_TARB ./lib/
fi

# For the directory above the current package, i.e. node_modules inside the dir in which the user
# ran `npm install <pkg>`

cd "$NPM_ROOT/.jsanver"
for ver in $(find . -name '*.json')
do
    bname=$(basename "$ver")
    print_key "$NPM_ROOT/.jsanver/$bname" name
    DIST_NAME=$KEY
    DIST_VER_FILE="$NPM_ROOT/.jsanver/$DIST_NAME.json"
    DIST_VER_TARB="$NPM_ROOT/.jsanver/$DIST_NAME.tar.gz"

    ONE_UP_DIST_VER_FILE="$ONE_UP_NPM_ROOT/.jsanver/$DIST_NAME.json" 
  
    print_key $DIST_VER_FILE version
    GOING_TO_INSTALL=$KEY
  
    if [ -e "$ONE_UP_DIST_VER_FILE" ]  
    then
        print_key $ONE_UP_DIST_VER_FILE version
        ALREADY_HAS=$KEY

        echo "Version file exists for: $ONE_UP_DIST_VER_FILE, we have $ALREADY_HAS and installing $GOING_TO_INSTALL"

        compare_versions $ALREADY_HAS $GOING_TO_INSTALL

        if [ $CMP_RES -eq "1" ]
        then
            echo "Already have a newer version, skipping..."
        else
            echo "Unpacking $DIST_VER_TARB"
            mkdir temp
            cd temp
            tar xzf "$DIST_VER_TARB"
            echo "Copying unpacked tarball 'lib/*' to $ONE_UP_NPM_ROOT/.jsan"
            cp -R ./lib/* "$ONE_UP_NPM_ROOT/.jsan"
            cd ..
            echo "Deleting temporary files"
            rm -rf temp
            echo "Copying $DIST_NAME.tar.gz and $DIST_NAME.json to $ONE_UP_NPM_ROOT/.jsanver"
            cp "$DIST_VER_FILE" "$ONE_UP_NPM_ROOT/.jsanver/"
            cp "$DIST_VER_TARB" "$ONE_UP_NPM_ROOT/.jsanver/"
            cd "$CURRENT_PKG_DIR"
        fi
    else
        echo "Unpacking $DIST_VER_TARB"
        mkdir temp
        cd temp
        tar xzf "$DIST_VER_TARB"
        echo "Copying unpacked tarball 'lib/*' to $ONE_UP_NPM_ROOT/.jsan"
        cp -R ./lib/* "$ONE_UP_NPM_ROOT/.jsan"
        cd ..
        echo "Deleting temporary files"
        rm -rf temp
        echo "Copying $DIST_NAME.tar.gz and $DIST_NAME.json to $ONE_UP_NPM_ROOT/.jsanver"
        cp "$DIST_VER_FILE" "$ONE_UP_NPM_ROOT/.jsanver/"
        cp "$DIST_VER_TARB" "$ONE_UP_NPM_ROOT/.jsanver/"
        cd "$CURRENT_PKG_DIR"
    fi
done