JavaScript Joel

Posted on Nov 27, 2018

Getting node.js and Express up and running on my... phone?

#android #mobile #javascript #node

I installed Termux from the Play store. It's free and doesn't require root access. Sorry but if you have an iPhone, go fish.

The first thing I always do is check for updates by running these commands. If you have been away from your terminal for a while, it's good to run them again.

apt update
apt upgrade

To extended the keyboard to give you options to keys like ESC, HOME, END, TAB, etc. Swipe from left to right to open the Termux menu and long press on the KEYBOARD word.

Install nodejs, curl, and git. I know for sure I'll need these.

apt install nodejs curl git

Install your favorite editor. vi is already installed, but I like nano.

pkg install nano

I had to fix npm so that I could install packages globally.

nano ../usr/lib/node_modules/npm/node_modules/worker-farm/lib/farm.js

set maxConcurrentWorkers to 1.

I always create a dev directory to keep all my projects.

mkdir dev
cd dev

Time to give it a spin

Let's fire up an example Express app to see if this thing will go.

git clone https://github.com/joelnet/MojiScript.git
cd MojiScript/examples/express-static-files
npm ci
npm start

Okay, it says it's listening on port 3000, but I have been lied to before.

Awesome! Looks like it really works!

Notes

I could get n to install, but it didn't have access to /usr directory and fails. This wasn't important to me at this moment, so I didn't dig into a fix. Maybe if you know you can let me know in the comments.

Not all packages are compatible. So this isn't going to be replacing my dev machine any time soon. But it's nice to be able to tinker on the go.

Summary

I was able to get node and express up and running on my Android phone using Termux. The setup is pretty fast and straight forward. I was actually surprised at how easy this was.

I use this setup to run some quick JavaScripts when I am not around a computer. This happens more than I would like to admit.

Where should I take this next? Let me know what you would do with this setup in the comments!

I did get WarriorJS up and running too!

If you love Functional JavaScript, follow me here or on Twitter @joelnet!

Top comments (11)

sangowen • Nov 29 '18 • Edited

Termux is really fun! Just my 2 cents, I've installed sshd, mariadb and host a local gitea. With gitea I can push my dotfiles & personal wiki on my laptop into the repos as a backup through ssh.
Recently there is another promising project called UserLAnd. It even lets you apt install straight from debian/ubuntu repo without root. I managed to duplicate my i3wm & all of the terminal functionality I have in my laptop (urxvt,oh-my-zsh,compton,rofi,ranger...). Here's a screenshot of the TigerVNC session.
Hope everyone have fun playing with these awesome apps!

JavaScript Joel • Nov 29 '18

That's Awesome!!!

I definitely have just started to play with this but see so many possibilities.

I'm curious about your gitea + ssh to push files. I have another project where I need to sync files with a remote machine s and I have been looking into different tools to do this.

Could you describe your setup and how it works?

Cheers!

sangowen • Nov 30 '18 • Edited

This is the record I left in my wiki a few months ago. A small part of the instruction (mostly step 5 ~ 6) are SQL commands or instead only descriptive.

Setup:

install termux, sshd, go, make
- pkg install sshd golang-1.10 make
put public key into .ssh/authorized_keys
- cat ~/.ssh/ssh_host_rsa_key.pub >> ~/.ssh/authorized_keys
set GOPATH & put lib & GOPATH/bin into PATH
- export GOPATH="/data/data/com.termux/files/home/go/"
- export PATH="$PATH:/data/data/com.termux/files/home/go/src/github.com/jteeuwen/go-bindata/"
- export PATH="$PATH:/data/data/com.termux/files/usr/lib/go"
- export PATH=$PATH:$(go env GOPATH)/bin
install mariadb
- pkg install mariadb
- mysql_install_db
maybe change root password for mariadb
- stop mysqld
- mysqld_safe --skip-grant-tables --skip-networking &
- mysql -u root
- FLUSH PRIVILEGES;
- ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';
- stop mysqld again
- restart
create gitea database
- CREATE DATABASE gitea DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
download & build gitea go package
- go get -d -u code.gitea.io/gitea
- cd $GOPATH/src/code.gitea.io/gitea
- make generate all
ssh into itself to get a valid username for gitea installation
- ssh 192.168.43.1 -p 8022
start gitea
- cd $GOPATH/src/code.gitea.io/gitea
- ./gitea web
open localhost:3000 with browser and install with mysqldb
create user, repo
currently I haven't fix git ssh path shown in UI, ssh can only access by:
- git remote add phone ssh://u0_a238@192.168.43.1:8022/data/data/com.termux/files/home/gitea-repositories/[gitea_username]/[reop_name].git
- git push -u phone master

Jose Albizures • Nov 28 '18

I did this some time ago and it's pretty cool! You also can activate your phone hotspot and connect another phone to that network, and see your changes there. I tried with react-create-app back then and the livereload makes this workflow a lot easier. Keep an eye to your node_module size though 🤣

Keziah • Nov 28 '18

Niice xD

JavaScript Joel • Nov 28 '18

That sounds cool. It would be interesting to setup remote debugging also.

Cristian Popescu • Nov 28 '18

This is pretty cool, I have to admit. I love the fact that you can test almost all your sudden ideas and put them into practice, there are always such ideas, as you state.
Ideas that if you don't get a quick test on, you will not be able to go through with you subway way home 😁.
I will defenetely try it and see what's up for installing.

Thank you.