Toolbox "Install Script": no progress feedback while crawling feeds, and silent empty list when everything is already installed

[mojie126]

Environment

• DependencyControl v0.9.0 (also present in v0.8.2)
• Aegisub (arch1t3cht's fork) on Windows
• Toolbox macro "DependencyControl/Install Script"

Problem 1: no progress feedback while crawling feeds

The install macro in macros/l0.DependencyControl.Toolbox.moon never calls aegisub.progress.task, so during the feed crawl (buildFeedInventory! / crawlWithPrompt, ~9 seconds with the default 21 feeds) the BackgroundScriptRunner progress dialog stays completely blank. There is no indication that anything is happening, which reads as a hang.

crawlWithPrompt itself doesn't report progress either, and the file contains no aegisub.progress.* call at all:

macros, modules = {}, {}
entries = crawlWithPrompt buildFeedInventory!

logger\log msgs.install.scanning, #entries

logger\log only writes to the DependencyControl log file, so it doesn't help here.

Problem 2: silent empty list when everything is already registered

addAvailableToInstall filters against config.c[section][namespace], and since automation scripts are registered automatically at startup, the install list is usually empty — the macro then pops the script list dialog with only a "Cancel" button and no explanation.

Suggested fix

• Call aegisub.progress.task "Scanning available feeds..." before the crawl and aegisub.progress.task "Loading feed data..." before loading the feed data, so the progress dialog shows what's going on.
• When both macros and modules end up empty, tell the user everything is already installed (e.g. a small label dialog or at least a log message) instead of silently showing an empty "Cancel"-only dialog.

I have a patch ready and will open a PR referencing this issue.