Script to create a TypeScript project with predefined subprojects.

.editorconfig

root = true

[*]
indent_style = space
indent_size = 2
end_of_line = lf
charset = utf-8
trim_trailing_whitespace = true
insert_final_newline = true

.gitignore

/node_modules
*.js
*.map
*.d.ts
tsconfig.tsbuildinfo

.prettierrc

{
  "tabWidth": 2,
  "objectWrap": "collapse",
  "proseWrap": "always",
  "semi": true,
  "printWidth": 70,
  "trailingComma": "none",
  "singleQuote": false,
  "arrowParens": "avoid",
  "quoteProps": "consistent",
  "useTabs": false
}

README.md

Create TypeScript project

Run the script

gh gist view bde7fc01fc645bb98d0159306f25cb16 --filename create-typescript-project.sh --raw | bash

create-typescript-project.sh

#!/bin/bash

gist_id=bde7fc01fc645bb98d0159306f25cb16

read_file() {
  gh gist view "$gist_id" --filename "$1"
}

copy_gist_file(){
  local file_name
  file_name="$1"

  if [[ -f "${file_name}" ]]; then
    echo "${file_name} already exists. Skipping."
    return 0
  fi

  read_file "${file_name}" > "${file_name}" || return 1
  echo "Created ${file_name} from Gist ${gist_id}"
}

copy_files(){
  copy_gist_file .prettierrc
  copy_gist_file .editorconfig
  copy_gist_file .gitignore
  copy_gist_file tsconfig.base.json
}

main() {
  # Create `.nvmrc` folder
  node --version > .nvmrc || exit 1

  # Set up `.prettierrc` and `.editorconfig` file
  copy_files || exit 1

  # TypeScript projects since the root folder
  local -a typescript_projects
  typescript_projects=(
    src
    test
  )

  local -a development_dependencies
  development_dependencies=(
    semver
    tsx
    typescript
    eslint
    prettier
  )

  local base_tsconfig_path
  base_tsconfig_path="tsconfig.base.json"

  # Install development dependencies
  npm install --save-dev "${development_dependencies[@]}"

  local get_current_node_major_version_args
  get_current_node_major_version_args=(
    -p 'require("semver").parse(process.argv[1]).major'
    "$(node --version)"
  )

  local node_major_version
  node_major_version="$(node "${get_current_node_major_version_args[@]}" || exit 1)"

  # Install type definitions for Node.js
  npm install -D '@types/node@'"^${node_major_version}"

  # Create `tsconfig.json`
  npx tsc --init || exit 1

  # Rename `tsconfig.json` to `tsconfig.defaults.json`
  mv --verbose tsconfig.json tsconfig.defaults.json

  for project_folder in "${typescript_projects[@]}"; do
    mkdir --parents --verbose "${project_folder}"

    local project_relative_base_tsconfig_path
    project_relative_base_tsconfig_path="$(realpath --canonicalize-existing --relative-to "${project_folder}" "${base_tsconfig_path}")"

    # Create tsconfig.json
    echo "{ \"extends\": \"${project_relative_base_tsconfig_path}\" }" > "${project_folder}/tsconfig.json"

    # Create `index.ts`
    echo 'export default 1;' > "${project_folder}/index.ts"
  done

  # Install production dependencies
  npm install --save "$@"
}

main "$@" || exit 1

tsconfig.base.json

{
  "compilerOptions": {
    "incremental": true,
    "composite": true,
    "allowJs": false,
    "checkJs": false,
    "types": [],
    "lib": [],
    "strict": true,
    "target": "esnext",
    "module": "nodenext",
    "moduleResolution": "nodenext",
    "declaration": true,
    "declarationMap": true,
    "sourceMap": true,
  },
  "include": [],
  "exclude": []
}