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Once it stops the temporary break-point will be cleared.

If you want to run to line 100 and stop you can enter c 100 and the debugger will set a temporary break-point, the program will run then stop there if it's in the execution path. You can tell the application to run until a certain condition exists, then have it break, making it easy to locate nil values, or other conditions that occur sporadically.įrom the command-line use rdebug appname and you'll end up at the debugger prompt. Ruby-debug is easy to learn and very useful. The launch.Ruby-debug is for 1.8+ and ruby-debug19 is for 1.9+. ) is shared with the name /app in a container and VSCode on the host can connect to the debuggee process in a container by TCP/IP port 12345. And you will see the following default configurations. vscode/launch.json with default settings, you only need to click "create a launch.json file" on the "Run and Debug" pane. See also: Debugging in Visual Studio Codeįor developers: RUBY_DEBUG_DAP_SHOW_PROTOCOL=1 on rdbg terminal will show the all DAP protocol. On the debug console, you can input valid Ruby program and you will get an evaluation result on selected context ("Call stack"). When the program stops, you can see "Call stack", "Variables" and you can set "Watch" expressions. by exception (if you enable "rescue exception").by setting breakpoints (F9) on source code.You can see stdout/err outputs and you can input stdin on rdbg terminal. When you select a command line, the specified command will run on rdbg debugger, and VSCode will connect to the rdbg debugger with UNIX domain socket.Īnd new terminal is created (named rdbg). bundle exec rspec (launch rspec command with bundle exec).ruby foo.rb 10 20 30 (launch foo.rb with options 10, 20 and 30).Please specify your favorite command line you want to debug. You will see the "Debug command line" input dialog. Without any configuration, you can use this debugger by "Start Debugging" (F5 key) if you activate. You need to install latest debug gem and rdbg command should be in $PATH. Ruby debugger to connect debug library which utilize recent Ruby's debug support features.