gitstart.sh

#!/usr/bin/env bash

########################
# Author: Shinichi Okada
# Date: 2021-05-22
###########################

unset user dir repo license_url

script_name=$(basename "$0")
dir=""
version="0.2.4"

usage() {
    cat <<EOF

Script name: $script_name

Description:
============

This script automate creating git repo.
This will create a dir, add a license, README file, run git init and push to Github. 

If a language is added, it will try to add the .gitignore.
Choose SSH as the default git protocol.

List of .gitignore supported by Github
======================================

See https://github.com/github/gitignore

Dependencies:
=============

- gh, GitHub CLI https://cli.github.com/manual/
- yq, https://github.com/mikefarah/yq
- jq

Usage:
======

$script_name [ -l | --lang programming_language ] [ -d | --dir directory ] [ -h | --help | -v | --version]

Examples:
=========

    $script_name -l python -d newrepo
    $script_name -d newrepo
    # in a directory
    $script_name -d .
    # Show help
    $script_name -h
    # Show version
    $script_name -v
EOF
    exit 2
}

while (($# > 0)); do # while arguments count>0
    case "$1" in
    -l | --lang)
        prog_lang=$2
        shift
        ;;
    -d | --dir)
        dir=$2
        shift
        ;;
    -h | --help)
        usage
        ;;
    -v | --version)
        echo ${version}
        exit
        ;;
    *) # unknown flag/switch
        POSITIONAL+=("$1")
        shift
        ;;
    esac
done

############# Main body ############
# check if you are logged in github
if [[ $(gh auth status) -eq 1 ]]; then
    # not logged-in
    echo ">>> You must logged in. Use 'gh auth login'"
    exit 1
fi

# don't allow to create a git repo in the ~ (HOME)
# user may use . in the HOME
cwd=$(pwd)
if [[ (${dir} = "$HOME") || ($cwd = "$HOME" && ${dir} = ".") ]]; then
    echo "This script doesn't allow to create a git repo in the home directory."
    echo "Use another directory."
    exit 1
fi

# if dir is empty exit
if [[ -z ${dir} ]]; then
    echo "You must set -d dir_name."
    exit
fi

# check if you have Github CLI
if [ ! "$(command -v gh)" ]; then
    echo "Please install Github CLI from https://cli.github.com/manual/."
    exit 2
fi

# check if you have yq
if [ ! "$(command -v yq)" ]; then
    echo "Please install yq from https://github.com/mikefarah/yq."
    echo "Or run brew install yq"
    exit 2
fi

# Directory path. If dir is . then use pwd
if [[ ${dir} = "." ]]; then
    dir=$(pwd)
else
    echo ">>> Creating ${dir}."
    dir="$(pwd)/$dir"
    mkdir -p "$dir" || exit
    # cd "$dir" || exit
fi

user=$(yq e '."github.com".user' "$HOME"/.config/gh/hosts.yml)

repo=$(basename "${dir}")
license_url="mit"
echo ">>> Your github username is ${user}."
echo ">>> Your new repo name is ${repo}."

# lisence
PS3='Your lisence: '
lisences=("MIT: I want it simple and permissive." "Apache License 2.0: I need to work in a community." "GNU GPLv3: I care about sharing improvements." "None" "Quit")

echo "Select a license: "
select license in "${lisences[@]}"; do
    case ${license} in
    "MIT: I want it simple and permissive.")
        echo "MIT"
        break
        ;;
    "Apache License 2.0: I need to work in a community.")
        echo "Apache"
        license_url="apache-2.0"
        break
        ;;
    "GNU GPLv3: I care about sharing improvements.")
        echo "GNU"
        license_url="lgpl-3.0"
        break
        ;;
    "None")
        echo "License None"
        license_url=false
        break
        ;;
    "Quit")
        echo "User requested exit."
        exit
        ;;
    *) echo "Invalid option $REPLY" ;;
    esac
done

echo "$dir"
cd "$dir" || exit

if [[ ${license_url} != false ]]; then
    touch "${dir}"/license.txt
    curl -s "https://api.github.com/licenses/${license_url}" | jq -r '.body' >"${dir}"/license.txt
    echo ">>> license.txt created."
fi

if [[ ${prog_lang} ]]; then
    # github gitignore url
    url=https://raw.githubusercontent.com/github/gitignore/master/"${prog_lang^}".gitignore
    # get the status http code, 200, 404 etc.
    http_status=$(curl --write-out '%{http_code}' --silent --output /dev/null "${url}")

    if [[ $http_status -eq 200 ]]; then
        # get argument e.g python, go etc, capitalize it
        echo ">>> Creating .gitignore for ${1^}..."
        # create .gitignore
        curl "${url}" -o .gitignore
        echo ">>> .gitignore created."
    else
        echo ">>> Not able to find ${1^} gitignore at https://github.com/github/gitignore."
        echo ">>> Adding .gitignore with minimum contents."
        touch "${dir}/.gitignore"
        echo ".DS_Store" >"${dir}/.gitignore"
    fi
else
    echo ">>> Adding .gitignore with minimum contents."
    touch "${dir}/.gitignore"
    echo ".DS_Store" >"${dir}/.gitignore"
fi

# README
echo ">>> Creating README.md."
printf "# %s \n
## Overview\n\n
## Requirement\n\n
## Usage\n\n
## Features\n\n
## Reference\n\n
## Author\n\n
## Licence

Please see license.txt.\n" "${repo}" >README.md

# git commands
echo ">>> Running git init."
git init
echo ">>> Adding README.md and .gitignore."
git add .
echo ">>> Commiting with a message 'first commit'."
git commit -m "first commit"
echo ">>> Creating the main branch."
git branch -M main

echo ">>> Creating your ${repo} in remote."
gh repo create "${repo}"
git remote add origin [email protected]:"${user}"/"${repo}".git
echo ">>> Pushing local repo to the remote."
git push -u origin main
echo ">>> You have created a github repo at https://github.com/${user}/${repo}"

exit 0