Setting up dev-tools on iOS, using iSH app

setup-ish.sh

# iSH app: https://ish.app/
# Installing Alpine Linux APK packages: https://wiki.alpinelinux.org/wiki/Alpine_newbie_apk_packages#install_basic_tools
# BusyBox: https://busybox.net/

# Update APK repositories and upgrade packages
apk update
apk upgrade

# Note: iSH comes packaged with BusyBox `grep`, `less` and `sed`
which grep less sed > ~/original_versions.log
grep --version >> ~/original_versions.log
less --version >> ~/original_versions.log
sed --version >> ~/original_versions.log

# Install `curl`, `git`, `python3` and GNU versions of `bash`, `grep`, `less`, `sed`
apk add bash curl git grep less python3 sed

# Backup `/etc/passwd` and replace `ash` with `bash` as default shell
cp /etc/passwd ~/passwd.original
sed -i "s/ash/bash/1" /etc/passwd

# Update `bash` prompt
echo 'PS1="\s@\W $ "' > ~/.bash_profile

# Change timezone from UTC to local timezone (IST)
apk add tzdata
cp /etc/localtime ~/localtime.original # Original may not be present
cp /etc/timezone ~/timezone.original   # Original may not be present
cp /usr/share/zoneinfo/Asia/Kolkata /etc/localtime
echo "Asia/Kolkata" >> /etc/timezone
apk del tzdata

# Save above steps to setup file
cat ~/.ash_history > ~/setup-ish.sh

# NodeJS is also available for installation
# apk add nodejs