How to use Node.js to write a command line tool
This article mainly introduces "how to use Node.js to write a command line tool". In daily operation, I believe many people have doubts about how to use Node.js to write a command line tool. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the questions of "how to use Node.js to write a command line tool". Next, please follow the editor to study!
The operating system needs to be Linux
1. target
Enter the command you wrote on the command line to complete the target task.
Command line requires global validity
Command line requirements can be deleted
Command line action to generate a file that displays the current date
two。 Code part
Create a new file and name it sherryFile
The contents of the file sherryFile
Description: generate a file with the current date and creator
#! / usr/bin/env nodeconsole.log ('command start'); const fs = require (' fs'); let date = new Date (). ToLocaleDateString (); let data = date +'\ n\ t'+'--create By karuru';fs.writeFile ('. / date.txt', data, 'utf8', (err) = > {if (err) {console.log (' sherryFile command wrong', err); return false;} console.log ('writeFile examples) Console.log ('command end');})
Give the file execution permission chmod 755 sherryFile
Enter. / sherryFile under the file path where the file is located
If you output the following, the command was executed successfully
Command start
WriteFile success!!!!
Command end
In this file directory, a new date.txt file will be generated, as follows
2/28/2018
Create By karuru
Modify the command to be globally valid
Ln sherryFile / usr/local/bin/sherryFile
Delete command
Rm / usr/local/bin/sherryFile at this point, the study on "how to use Node.js to write a command line tool" is over. I hope I can solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!
