Alternatively, to run commands from a file, use the runfromfile method. The return value you get from run is a combination of what R would display on the standard output and the standard error, but the exact order may differ. Threads - Perl interpreter-based threads #VERSION. This document describes threads version 2.25 #WARNING. The 'interpreter-based threads' provided by Perl are not the fast, lightweight system for multitasking that one might expect or hope for. Threads are implemented in a way that makes them easy to misuse. Whenever you come up with new idea, learn or teach programming, you and others can just write and run code. Paiza.IO engine paiza.IO engine is the lightest container based code runner engine that support all(20+) popular compiler or script languages. Paiza.IO engine provides stable running time, extremely low latency without any polling,. Perl has been built with PERLOLDSIGNALS (see perl -V). The environment variable PERLSIGNALS is set to unsafe (see 'PERLSIGNALS' in perlrun). The module Perl::Unsafe::Signals is used. If unsafe signals is in effect, then signal handling is not thread-safe, and the -kill signalling method cannot be used. # Identity of objects returned from threads. If you developing on a remote machine, you can instruct the Perl::LanguageServer to run on that remote machine, so the correct modules etc. Are available for syntax check and debugger is started on the remote machine.

Senior Member

Run Perl Script Online

joined:Apr 15, 2003
posts:7256
votes: 3

Never coded in PERL before. I need to create a very small PERL script that simply opens a URL and then prints it. Actually I need to do a bit more than that but haven't got past this first base yet.

I found a few tutorials around on the web for PERL and ended up with this:-

But it doesn't do what I intended it to do which is:-

1. Print to screen 'testing' <- that bit works at least ;)
2. Open a URL residing on my local Apache-SSL service (in this case just the root index.html)
3. Print the contents of that page
4. Release the file handle.

I run it from the command line as:-

perl perltest.pl

It prints the 'testing' OK but nothing else. No errors.

Can anyone help? Also, the perldoc website (where I found various functions) doesn't tell me what return type to expect from sysopen. What's the best way to examine the return for errors?

I'm guessing I may need some kind of 'get' function, but a search for wget on the perldoc website doesn't reveal anything. Nor did a search for 'get' reveal anything which looked right.

I don't really want to go through a full PERL tutorial as this is the first, and possibly last, time I am likely to need to use it and it'll be a 7 or 8 line script, tops.

Thanks!

Language Server and Debugger for Perl

Features

Code Runner Perl

• Language Server
  • Syntax checking
  • Symbols in file
  • Symbols in workspace/directory
  • Goto Definition
  • Find References
  • Call Signatures
  • Supports multiple workspace folders
  • Document and selection formatting via perltidy
  • Run on remote system via ssh
• Debugger
  • Run, pause, step, next, return
  • Support for coro threads
  • Breakpoints
  • Conditional breakpoints
  • Breakpoints can be set while program runs and for modules not yet loaded
  • Variable view, can switch to every stack frame or coro thread
  • Set variable
  • Watch variable
  • Tooltips with variable values
  • Evaluate perl code in debuggee, in context of every stack frame of coro thread
  • Automatically reload changed Perl modules while debugging
  • Debug multiple perl programs at once
  • Run on remote system via ssh

Requirements

You need to install the perl module Perl::LanguageServer to make this extension work,e.g. run 'cpan Perl::LanguageServer' on your target system.

Please make sure to always run the newest version of Perl::LanguageServer as well.

Extension Settings

This extension contributes the following settings:

• perl.enable: enable/disable this extension
• perl.sshAddr: ip address of remote system
• perl.sshPort: optional, port for ssh to remote system
• perl.sshUser: user for ssh login
• perl.sshCmd: defaults to ssh on unix and plink on windows
• perl.sshWorkspaceRoot: path of the workspace root on remote system
• perl.perlCmd: defaults to perl
• perl.perlArgs: additional arguments passed to the perl interpreter that starts the LanguageServer
• perl.sshArgs: optional arguments for ssh
• perl.pathMap: mapping of local to remote paths
• perl.perlInc: array with paths to add to perl library path. This setting is used by the syntax checker and for the debugee and also for the LanguageServer itself.
• perl.fileFilter: array for filtering perl file, defaults to [.pm,.pl]
• perl.ignoreDirs: directories to ignore, defaults to [.vscode, .git, .svn]
• perl.debugAdapterPort: port to use for connection between vscode and debug adapter inside Perl::LanguageServer. On a multi user system every user must use a different port.
• perl.showLocalVars: if true, show also local variables in symbol view
• perl.logLevel: Log level 0-2.
• perl.logFile: If set, log output is written to the given logfile, instead of displaying it in the vscode output pane. Log output is always appended. Only use during debugging of LanguageServer itself.
• perl.disableCache: if true, the LanguageServer will not cache the result of parsing source files on disk, so it can be used within readonly directories'

Debugger Settings for launch.json

• type: needs to be perl
• request: only launch is supported (this is a restriction of perl itself)
• name: name of this debug configuration
• program: path to perl program to start
• stopOnEntry: if true, program will stop on entry
• args: optional, array with arguments for perl program
• env: optional, object with environment settings
• cwd: optional, change working directory before launching the debugee
• reloadModules: if true, automatically reload changed Perl modules while debugging

Remote syntax check & debugging

If you developing on a remote machine, you can instruct the Perl::LanguageServer torun on that remote machine, so the correct modules etc. are available for syntax check and debugger is started on the remote machine.To do so set sshAddr and sshUser, preferably in your workspace configuration.

Example:

Also set sshWorkspaceRoot, so the local workspace path can be mapped to the remote one.

Example: if your local path is 10.11.12.13sharepathtows and on the remote machine you have /path/to/ws

The other possibility is to provide a pathMap. This allows to have multiple mappings.

Examples:

Syntax check & debugging inside a container

It's possible to use the ssh settings also for containers. The example below is for docker-compose but there's nothing prevent you from tuning it to do docker exec, kubectl exec, machinectl shell or whatnot.

.vscode/settings.json

bin/shell-into-appserver.sh:

Carton support

If you are using Carton to manage dependencies, add the full path to the Carton lib dir to your workspace settings file at .vscode/settings.json. For example:

Linux

Mac

Known Issues

Does not yet work on windows, due to issues with reading from stdin.

Release Notes

see CHANGELOG.md

More Info

Presentation at German Perl Workshop 2020: