IDA Capa Explorer - plugin causes issues if running ida in cmd batch mode.

[cjchristopher]

Description

With the Capa Explorer plugin installed correctly (and working in IDA), causes issues running ida on the command line - as the plugin doesn't check if ida is being run in batch or gui mode - Qt errors get thrown and causes the analysis to lock up / never complete, presumably as it is trying to update/address GUI elements that don't exist.

Steps to Reproduce

Install Capa Explorer as per repo instructions (verify it works correctly in GUI). Run a command line job (say via idat64) that possibly doesn't even involve the plugin (and indeed, never calls it)

Expected behavior:

Job to complete

Actual behavior:

Throws Qt errors.
"QPixmap: Must construct a QGuiApplication before a QPixmap"

Versions

IDA Pro 7.6
capa 5.0.0
python 3.10
Win 10 Home

Additional Information

N/A

[williballenthin]

interesting, I bet this has to do with trying to load the icon.

perhaps we should update the following logic to not load capa explorer in headless mode:

capa/capa/ida/plugin/__init__.py

Lines 43 to 50 in 501e213

	# do not load plugin if IDA version/file type not supported
	if not capa.ida.helpers.is_supported_ida_version():
	return idaapi.PLUGIN_SKIP
	if not capa.ida.helpers.is_supported_file_type():
	return idaapi.PLUGIN_SKIP
	if not capa.ida.helpers.is_supported_arch_type():
	return idaapi.PLUGIN_SKIP
	return idaapi.PLUGIN_OK

[mike-hunhoff]

@cjchristopher I've opened a fix for this under #1341