{"id":252,"date":"2013-01-27T15:23:46","date_gmt":"2013-01-27T14:23:46","guid":{"rendered":"http:\/\/benjiweber.co.uk\/blog\/?p=252"},"modified":"2013-01-27T15:23:46","modified_gmt":"2013-01-27T14:23:46","slug":"javascript-shell-scripting-with-nashorn","status":"publish","type":"post","link":"https:\/\/benjiweber.co.uk\/blog\/2013\/01\/27\/javascript-shell-scripting-with-nashorn\/","title":{"rendered":"JavaScript shell scripting with Nashorn"},"content":{"rendered":"

One of the nice features of Nashorn<\/a> is that you can write shell scripts in JavaScript. <\/p>\n

It supports #!s, #comments, reading arguments, and everything there’s a Java library for (Including executing external processes obviously)<\/p>\n

Here’s an example<\/p>\n

\r\n#!\/home\/benji\/nashorn7\/bin\/nashorn\r\n#this is a comment\r\n\r\nprint('I am running from ' + __FILE__);\r\n\r\nvar name = arguments.join(' ');\r\nprint('Hello ' + name);\r\nvar runtime = Packages.java.lang.Runtime.getRuntime();\r\nruntime.exec('xmessage hello ' + name);\r\n<\/pre>\n
<\/p>\n
Nashorn also comes with an interactive shell “jjs”, which is great for trying things out quickly.<\/p>\n
<\/p>\n
If you want to run the scripts with Java7 instead of Java8 you’ll need to add Nashorn to the java boot classpath. Simply modify the “bin\/nashorn” script and append <\/p>\n
\r\n-J-Xbootclasspath\/a:$NASHORN_HOME\/dist\/nashorn.jar\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
One of the nice features of Nashorn is that you can write shell scripts in JavaScript. It supports #!s, #comments, reading arguments, and everything there’s a Java library for (Including executing external processes obviously) Here’s an example #!\/home\/benji\/nashorn7\/bin\/nashorn #this is a comment print(‘I am running from ‘ + __FILE__); var name = arguments.join(‘ ‘); print(‘Hello…  Read more »<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[23,16],"yoast_head":"\n\n\n\n\n\n\n\n\n\n\n\n