In this post I shared my step by step way to setup new expo project generally required to any project I would like to create. But after passed this instructions several times I found it very annoying and wasting my time. So I decided to write a script which will do all steps in one go.
Let's create directory and script file
mkdir -p automation/bin
cd automation/bin
touch quickstart
So quickstart will be our executable, continue with write our script in this file.
#!/usr/bin/env bash
This basically means that executable will be run by bash.
I would like to run command with project name as param
quickstart your-project-name-param
And I like to exit script if project name wasn't provided.
if [ -n "$1" ]; then
echo $1
else
echo "Error! Please enter project name!" 1>&2
exit 1
fi
$1 is first script param. And now we can create expo project with typescript template
expo init -t expo-template-blank-typescript $1
Then move to the project directory and install dependencies
DIR="$(pwd)"
cd "$DIR/$1"
yarn add -D eslint prettier @react-native-community/eslint-config @typescript-eslint/eslint-plugin eslint-config-prettier
Create and fill .eslintrc.js
cat > .eslintrc.js <<EOF
module.exports = {
extends: ['@react-native-community', "eslint-config-prettier"],
}
EOF
Update json files is easier to do inside the nodejs script automation/patch-json.js.
const fs = require('fs');
const args = process.argv.slice(2);
const getFilepath = (filename) => `${args[0]}/${filename}`
// console.log(args)
let fileName = getFilepath('tsconfig.json');
let file = require(fileName);
file.compilerOptions.module = "es6";
fs.writeFile(fileName, JSON.stringify(file), function writeJSON(err) {
if (err) return console.log(err);
console.log(JSON.stringify(file));
console.log('writing to ' + fileName);
});
fileName = getFilepath('package.json');
file = require(fileName);
if (file.resolutions) {
file.resolutions["@types/react"] = "^17"
} else {
file.resolutions = {
"@types/react": "^17"
}
}
fs.writeFile(fileName, JSON.stringify(file), function writeJSON(err) {
if (err) return console.log(err);
console.log(JSON.stringify(file));
console.log('writing to ' + fileName);
});
And we can run this node script like this
SCRIPTS_DIR="$(dirname -- "${BASH_SOURCE[0]}")/.."
node "$SCRIPTS_DIR/patch-json.js" "$DIR/$1"
SCRIPTS_DIR - directory where our patch-json.js script located. "$DIR/$1" - path of our newly created project.
Since I'm using WebStorm I would like to update .gitignore
echo ".idea" >> ".gitignore"
Apply all my rules with prettier
./node_modules/prettier/bin-prettier.js --write .
And commit changes to the git
git add .
git commit -m 'expostart script updates'
And the final step - to be able run the command from any directory I need to add my bin directory to the terminal PATH varilble. I'm using zsh so I'll put following to the ~/.zshrc
export PATH=$PATH:$HOME/scripts/expo/bin
Don't forget to source config before use
source ~/.zshrc
Now you can create new project with following command
quickstart your-project-name
You can find full script in the repository.
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