Thanks to the vscode-swf-debug project and the dap-mode extension, I discovered that it’s possible to debug .swf files in Emacs.
The communication with dap-mode is straightforward - the Java module swf-debug-adapter from vscode-swf-debug handles the DAP server, and from there you just need to integrate it with the extension.
;;; dap-as3.el --- DAP mode for ActionScript -*- lexical-binding: t; -*-
(require 'dap-mode)
(defcustom dap-swf-adapter-jar
""
"Path to the swf-debug-adapter jar file.
Example:
/home/user/vscode-swf-debug/swf-debug-adapter/target/swf-debug-adapter.jar"
:type 'string
:group 'dap-mode)
(defcustom dap-swf-runtime-executable
""
"Path to the SWF runtime executable (adl).
Example:
/home/user/airsdk/bin/adl"
:type 'string
:group 'dap-mode)
(defun dap-swf-start-adapter-command (port)
(format "java -jar %s --server=%d" dap-swf-adapter-jar port))
(defun dap-as3--populate-start-args (conf)
(let ((port (dap--find-available-port)))
(-> conf
(dap--put-if-absent :program-to-start (dap-swf-start-adapter-command port))
(dap--put-if-absent :type "swf")
(dap--put-if-absent :debugServer port)
(dap--put-if-absent :profile "desktop")
(dap--put-if-absent :request "launch")
(dap--put-if-absent :runtimeExecutable dap-swf-runtime-executable)
(dap--put-if-absent :name "SWF Debug"))))
(dap-register-debug-provider "as3" #'dap-as3--populate-start-args)
(provide 'dap-as3)
Now just define the dap-swf-adapter-jar and dap-swf-runtime-executable variables, and we’re ready to create a debug configuration:
(dap-register-debug-template
"Debug example"
(list :type "as3"
:name "example"
:program "/home/user/as3-example/bin-debug/example-app.xml"))