Little macOS program to generate checksums of hierarchies.
Hey guys, hope you will enjoy my checksummer (nice brand name btw).
Core Features:
- SHA256 & MD5 sums.
- Ability to add any files to the input. Folders will be traversed recursively.
- XPC service to perform calculation.
- Relative path deducing for resulting checksum file.
- Validation logic.
UI Features:
- Main window with input files panel.
- Ability to add files using
NSOpenPanel, by buttons or by hotkey cmd+O, or by dragging them inside the list. - Ability to load checksum files and validate checksums of input files against them.
- Dynamic progress indicator with the ability to cancel the operation using the button or Esc key.
- Ability to save checksum file.
- Ability to view checksum files in a separate window in a table.
- Drag and drop support for checksum file and for input files.
Architecture Notes
- App uses MVVM foundation to bind UI with the model.
- Main app contains XPC service. Both of them are dependant on
ChecksumKitframework to reuse model objects when needed.- Better idea is to create very thin "Model" framework and do not share real "calculation" code between XPC and app. But it was too much for this prototype.
- There are tests on vital core parts, such as hashing correctness and file path resolving.
- For each request, app creates separate
NSXPCConnectionand assigns "Listener" object as proxy to receive progress updates.- There is some problem in NSXPC code, and right now listeners are retained indefenitely. I have no idea why and I have no time to fix it (
- Probably maintaining one single
NSXPCConnectionwith task tokens would be better, but it is what it is.
Notes
- Thank you for this excellent task. Had a lot of fun with it.
- I really tried to wipe all the traces of my personality from the project, but maybe you will encounter some breadcrumbs. Please ignore them.