feat(flipper-app): initial commit

Author: Endika

.clang-format

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+BasedOnStyle: LLVM
+IndentWidth: 4
+ColumnLimit: 100
+AllowShortFunctionsOnASingleLine: None
+IndentCaseLabels: true

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/ci.yml

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+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: .
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: sudo apt-get update && sudo apt-get install -y build-essential cppcheck clang-format
+      - name: Run linter
+        run: make linter
+      - name: Check format
+        run: clang-format --dry-run --Werror *.c *.h tests/*.c
+      - name: Run tests
+        run: make test

.gitignore

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+# Compiled files
+test_logic
+*.o
+
+# Editor files
+.DS_Store
+*.swp
+*~

Makefile

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+# Path to your Flipper Zero firmware directory
+FLIPPER_FIRMWARE_PATH ?= /home/<YOUR_PATH>/flipperzero-firmware
+PWD = $(shell pwd)
+
+CC = gcc
+CFLAGS = -Wall -Wextra -std=c11 -I.
+
+.PHONY: all help test prepare fap clean clean_firmware format linter
+
+all: test
+
+help:
+	@echo "Available commands:"
+	@echo "  make test           - Run unit tests for the logic"
+	@echo "  make prepare        - Link this app to the Flipper firmware source"
+	@echo "  make fap            - Clean firmware build and build the Flipper Zero application"
+	@echo "  make format         - Run clang-format to format code"
+	@echo "  make linter         - Run cppcheck to analyze code"
+	@echo "  make clean          - Remove local compiled files"
+	@echo "  make clean_firmware - Remove firmware build directory"
+
+format:
+	clang-format -i *.c *.h tests/*.c
+
+linter:
+	cppcheck --enable=all --suppress=missingIncludeSystem --suppress=unusedFunction --suppress=missingInclude .
+
+test: logic.o tests/test_logic.o
+	$(CC) $(CFLAGS) -o test_logic logic.o tests/test_logic.o
+	./test_logic
+
+prepare:
+	@if [ -d "$(FLIPPER_FIRMWARE_PATH)" ]; then \
+		mkdir -p $(FLIPPER_FIRMWARE_PATH)/applications_user; \
+		ln -sfn $(PWD) $(FLIPPER_FIRMWARE_PATH)/applications_user/sub_duplicate_finder; \
+		echo "App linked to $(FLIPPER_FIRMWARE_PATH)/applications_user/sub_duplicate_finder"; \
+	else \
+		echo "Error: Flipper firmware path not found at $(FLIPPER_FIRMWARE_PATH)."; \
+	fi
+
+clean_firmware:
+	@if [ -d "$(FLIPPER_FIRMWARE_PATH)/build" ]; then \
+		echo "Cleaning firmware build directory..."; \
+		rm -rf $(FLIPPER_FIRMWARE_PATH)/build; \
+	fi
+
+fap: prepare clean_firmware clean
+	@if [ -d "$(FLIPPER_FIRMWARE_PATH)" ]; then \
+		cd $(FLIPPER_FIRMWARE_PATH) && ./fbt fap_sub_dup_finder; \
+	fi
+
+logic.o: logic.c logic.h
+	$(CC) $(CFLAGS) -c logic.c
+
+tests/test_logic.o: tests/test_logic.c logic.h
+	$(CC) $(CFLAGS) -c tests/test_logic.c -o tests/test_logic.o
+
+clean:
+	rm -f *.o tests/*.o test_logic

README.md

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+# Sub-GHz Duplicate Finder for Flipper Zero
+
+An application for Flipper Zero to identify, manage, and clean up duplicate `*.sub` files from Sub-GHz storage.
+
+## Screenshots
+
+| Main Menu | Groups View | File Management |
+| :---: | :---: | :---: |
+| ![Main](assets/main_menu.png) | ![Groups](assets/groups.png) | ![Delete](assets/delete.png) |
+
+> *Tip: Capture these screenshots using the "Remote" tab in qFlipper.*
+
+## Development Setup
+
+This project uses a standard `Makefile` for local development on your host machine (Linux/macOS).
+
+### Requirements
+
+- `gcc`, `make`, `clang-format`, `cppcheck`.
+
+### Commands
+
+- `make test`: Run unit tests for the core logic on your computer.
+- `make format`: Automatically format code using `clang-format`.
+- `make linter`: Run static analysis with `cppcheck` to ensure code safety.
+- `make prepare`: Links your local project directory into the Flipper Zero firmware `applications_user` folder.
+- `make fap`: Builds the `.fap` binary using `fbt` (requires firmware repo).
+- `make clean`: Cleans local build artifacts.
+
+## Building for Flipper Zero
+
+1. Clone the official [Flipper Zero Firmware](https://github.com/flipperdevices/flipperzero-firmware).
+2. Set the `FLIPPER_FIRMWARE_PATH` in your `Makefile` to point to your local firmware directory.
+3. Run `make fap` from this project's directory. This command will:
+   - Prepare the source code (symlink).
+   - Clean previous builds.
+   - Compile the binary using `fbt`.
+
+## CI/CD
+
+This project includes a GitHub Actions workflow that automatically runs:
+1. **Linter** (static analysis).
+2. **Format Check** (style enforcement).
+3. **Unit Tests** (logic validation).
+
+## Credits
+Author: Endika
+GitHub: [github.com/endika/flipper-sub-dup](https://github.com/endika/flipper-sub-dup)

application.fam

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+App(
+    appid="sub_dup_finder",
+    name="Sub Duplicate Finder",
+    apptype=FlipperAppType.EXTERNAL,
+    entry_point="sub_dup_finder_app",
+    stack_size=4 * 1024,
+    fap_version=(1, 0),
+    fap_icon="icons/icon.icon",
+    fap_category="Sub-GHz",
+    fap_author="Endika",
+    fap_description="Identify and clean up duplicate .sub files in storage",
+)