npmr

#!/bin/sh

# Exit on error
# TODO: Re-enable Exit on error when this sourcing NVM doesn't return non-0 exit status
# set -o errexit

red=$(tput setaf 1)
green=$(tput setaf 2)
bold=$(tput bold)
normal=$(tput sgr0)

nvm_file_path=~/.nvm/nvm.sh

usage() {
    echo """
recursive npm

Runs the given NPM command recursively in all the Git repositories being NPM
modules (ie. they have a package.json file at their root) located under the
current directory.

Usage:
$ cd ~/version/project-group
$ $0 NPM-COMMAND

Examples:
$ $0 link
$ $0 install
""" 1>&2
}

checkArgs() {
    if [ $# -lt 1 ]; then
        usage
        exit 3
    fi
}

checkArgs $@
npm_command=$@

if ! which npm && [ ! -r $nvm_file_path ] ; then
    echo "This script requires either npm or nvm"
    exit 1
fi

if [ -r $nvm_file_path ]; then
    . $nvm_file_path
    nvmautouse() {
        if [ -r .nvmrc ]; then
            nvm use
        else
            printf "$red"
            printf "Using the last loaded version of Node.js"
            printf "$normal"
            printf "\n"
        fi
    }
else
    nvmautouse() {
        # nvm is not present
        return
    }
fi

# Store current working directory
cwd=$(pwd)

# find won't descend into .git directories, but it still does descend into git
# repositories, looking for other .git folders. And that could be a costly
# operation.
for dotgit_dir_path in $(find . -name .git -type d -prune)
do
    # Restore current working directory for successive run
    cd "$cwd"

    # Change to the Git repository directory
    cd "$dotgit_dir_path/.."
    if [ ! -f 'package.json' ]
    then
        # This is not an NPM module
        continue
    fi
    printf "\n"
    printf "$bold"
    printf "$(pwd)"
    printf "$normal"
    printf " ← npm $npm_command"
    printf "\n"

    nvmautouse
    npm $npm_command
    printf "\n"
done