--- title: Command-Line Tools pagination_next: demos/engines/index --- import current from '/version.js'; import Tabs from '@theme/Tabs'; import TabItem from '@theme/TabItem'; With the availability of JS engines and the success of server-side platforms, it is feasible to build command-line tools for various workflows. This demo covers a number of strategies for building standalone processors. The goal is to generate CSV output from an arbitrary spreadsheet file. ## Deno `deno compile` generates a standalone executable that includes the entire JS runtime as well as user JS code. When compiling, the `--allow-read` option must be specified to allow the script to read files from the filesystem with `Deno.readFileSync`.
Complete Example (click to show) 1) Save the following script to `sheet2csv.ts`: ```ts title="sheet2csv.ts" /*! sheetjs (C) 2013-present SheetJS -- https://sheetjs.com */ // @deno-types="https://cdn.sheetjs.com/xlsx-latest/package/types/index.d.ts" import * as XLSX from 'https://cdn.sheetjs.com/xlsx-latest/package/xlsx.mjs'; import * as cptable from 'https://cdn.sheetjs.com/xlsx-latest/package/dist/cpexcel.full.mjs'; XLSX.set_cptable(cptable); /* Read and parse workbook */ const filename = Deno.args[0]; if(!filename) { console.error("usage: sheet2csv [sheetname]"); Deno.exit(1); } const workbook = XLSX.readFile(filename); /* Find worksheet */ const sheetname = Deno.args[1] || workbook.SheetNames[0]; if(!workbook.Sheets[sheetname]) { console.error(`error: workbook missing sheet ${sheetname}`); Deno.exit(1); } /* Generate CSV and print to stdout */ console.log(XLSX.utils.sheet_to_csv(workbook.Sheets[sheetname])); ``` 2) Build `sheet2csv` with `deno compile`: ```bash deno compile -r --allow-read sheet2csv.ts ``` `sheet2csv` is a generated executable that you can run.
## NodeJS There are a few popular tools for compiling NodeJS scripts to CLI programs. The demo script presents a friendly command line interface including flags: ```bash $ ./xlsx-cli -h Usage: xlsx-cli [options] [sheetname] Options: -V, --version output the version number -f, --file use specified workbook -s, --sheet print specified sheet (default first sheet) ... ``` 1) Download [`xlsx-cli.js`](pathname:///cli/xlsx-cli.js) 2) Install the dependencies:
{`\
npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz exit-on-epipe commander@2`}
{`\
pnpm install https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz exit-on-epipe commander@2`}
{`\
yarn add https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz exit-on-epipe commander@2`}
3) Follow tooling steps: 3) Run `nexe` and manually specify NodeJS version 14.15.3 ```bash npx nexe -t 14.15.3 xlsx-cli.js ``` This generates `xlsx-cli` or `xlsx-cli.exe` depending on platform. 3) Run `pkg`: ```bash npx pkg xlsx-cli.js ``` This generates `xlsx-cli-linux`, `xlsx-cli-macos`, and `xlsx-cli-win.exe` .