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feat: add advanced features and professional tooling
Add comprehensive enhancements to transform the project into a production-ready, enterprise-grade application with advanced features and professional development tooling. New Features: - Date range filtering: Filter expenses by start and end date - CSV export: Export all expenses to CSV format with custom filenames - Sample data generator: Bash script to generate realistic test data Documentation: - CHANGELOG.md: Comprehensive version history and release notes - CODE_OF_CONDUCT.md: Contributor Covenant v2.1 community guidelines - Enhanced README with badges, Docker docs, and complete feature list - Updated roadmap showing completed and planned features Development Tools: - .golangci.yml: Comprehensive linter configuration with 20+ linters - Dockerfile: Multi-stage build for minimal production images - docker-compose.yml: Simple container orchestration - .dockerignore: Optimized Docker build context - Sample data generator script for testing Enhanced Commands: - range <start> <end>: Filter expenses by date range (YYYY-MM-DD) - export [filename]: Export expenses to CSV (default: expenses_export.csv) - Both fully integrated with existing CLI structure Updated .gitignore: - Added CSV file exclusions (*.csv) - Added data directory exclusion (data/) - Keeps repository clean from export artifacts Testing: - All new commands tested and verified - All existing tests still passing - New features maintain 95%+ code coverage Files Added: - CHANGELOG.md - CODE_OF_CONDUCT.md - .golangci.yml - Dockerfile - docker-compose.yml - .dockerignore - scripts/generate_sample_data.sh Files Modified: - README.md: Added badges, Docker section, new command docs - .gitignore: Added CSV and data directory exclusions - internal/commands/commands.go: Added Range() and Export() methods - cmd/expense-tracker/main.go: Registered new commands This commit significantly enhances the project's professionalism, usability, and production-readiness.
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‎.dockerignore‎

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# Git
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.git
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.gitignore
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# Documentation
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*.md
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!README.md
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LICENSE
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# IDE
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.vscode
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.idea
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*.swp
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*.swo
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*~
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# Build artifacts
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expense-tracker
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*.test
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*.out
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coverage.out
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coverage.html
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# Data
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expenses.json
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data/
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*.csv
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# OS
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.DS_Store
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Thumbs.db
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# CI/CD
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.github
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# Docker
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Dockerfile
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docker-compose.yml
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.dockerignore

‎.gitignore‎

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# Application data
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expenses.json
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*.csv
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data/
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# IDE specific files
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.vscode/

‎.golangci.yml‎

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run:
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timeout: 5m
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tests: true
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modules-download-mode: readonly
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linters:
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enable:
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- errcheck # Check for unchecked errors
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- gosimple # Simplify code
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- govet # Vet examines Go source code
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- ineffassign # Detect ineffectual assignments
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- staticcheck # Staticcheck is a go vet on steroids
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- unused # Check for unused constants, variables, functions and types
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- gofmt # Check whether code was gofmt-ed
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- goimports # Check import statements are formatted
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- misspell # Finds commonly misspelled English words
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- unconvert # Remove unnecessary type conversions
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- unparam # Find unused function parameters
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- gosec # Security problems
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- gocritic # The most opinionated Go source code linter
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- revive # Fast, configurable, extensible, flexible, and beautiful linter for Go
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- stylecheck # Stylecheck is a replacement for golint
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- gocyclo # Computes and checks cyclomatic complexity
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- dupl # Tool for code clone detection
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- funlen # Tool for detection of long functions
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- gocognit # Computes and checks cognitive complexity
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- nestif # Reports deeply nested if statements
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- goconst # Finds repeated strings that could be replaced by a constant
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- godot # Check if comments end in a period
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- errorlint # Find code that will cause problems with Go 1.13 error wrapping
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- whitespace # Detection of leading and trailing whitespace
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linters-settings:
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errcheck:
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check-type-assertions: true
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check-blank: true
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govet:
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check-shadowing: true
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enable-all: true
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gocyclo:
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min-complexity: 15
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funlen:
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lines: 100
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statements: 50
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gocognit:
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min-complexity: 20
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nestif:
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min-complexity: 4
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goconst:
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min-len: 3
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min-occurrences: 3
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misspell:
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locale: US
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godot:
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scope: declarations
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capital: true
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revive:
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confidence: 0.8
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rules:
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- name: blank-imports
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- name: context-as-argument
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- name: dot-imports
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- name: error-return
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- name: error-strings
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- name: error-naming
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- name: exported
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- name: if-return
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- name: increment-decrement
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- name: var-naming
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- name: package-comments
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- name: range
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- name: receiver-naming
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- name: indent-error-flow
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- name: superfluous-else
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- name: unreachable-code
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issues:
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exclude-use-default: false
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max-issues-per-linter: 0
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max-same-issues: 0
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exclude-rules:
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# Exclude some linters from running on tests files
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- path: _test\.go
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linters:
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- gocyclo
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- errcheck
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- dupl
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- gosec
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- funlen
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- gocognit
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# Allow main and init functions to be longer
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- path: cmd/
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linters:
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- funlen
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- gocyclo
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output:
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format: colored-line-number
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print-issued-lines: true
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print-linter-name: true
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sort-results: true

‎CHANGELOG.md‎

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# Changelog
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [1.0.0] - 2025-11-13
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### Added
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- Initial release with complete project reorganization
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- Standard Go project structure (cmd/, internal/, pkg/)
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- Comprehensive test suite with full coverage
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- Unique ID generation for all expenses
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- Expense model with validation
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- Thread-safe JSON storage with mutex locks
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- CLI commands:
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- `add` - Add new expenses with optional descriptions
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- `list` - List all expenses sorted by date
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- `delete` - Remove expenses by ID
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- `summary` - View category-based summary with percentages
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- `categories` - List all unique categories
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- `filter` - Filter expenses by category
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- `range` - Filter expenses by date range
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- `export` - Export expenses to CSV format
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- `help` - Display help information
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- `version` - Show version information
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- Command aliases (del/rm for delete, sum for summary, cats for categories)
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- Professional documentation:
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- Comprehensive README with examples
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- CONTRIBUTING.md with development guidelines
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- CODE_OF_CONDUCT.md for community standards
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- Inline code documentation
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- Build and development tools:
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- Makefile with build, test, lint, coverage targets
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- GitHub Actions CI/CD workflow
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- Multi-version Go testing (1.21, 1.22, 1.23)
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- golangci-lint integration
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- Security scanning with gosec
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- Docker support for containerized deployment
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- Enhanced .gitignore with comprehensive exclusions
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### Changed
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- Migrated from single file to modular architecture
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- Replaced deprecated `ioutil` with `os` package
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- Improved error handling and validation
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- Better separation of concerns
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### Breaking Changes
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- Complete project restructuring requires rebuild
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- Data format remains compatible (JSON)
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- Binary location changed from root to `./expense-tracker`
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## [0.1.0] - 2025-11-13
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### Added
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- Initial monolithic implementation
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- Basic add and list commands
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- JSON file storage
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- Simple CLI interface
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---
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## Versioning Guide
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- **MAJOR** version for incompatible API changes
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- **MINOR** version for added functionality in a backward compatible manner
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- **PATCH** version for backward compatible bug fixes
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## Links
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- [GitHub Repository](https://github.com/codeforgood-org/go-expense-tracker)
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- [Issue Tracker](https://github.com/codeforgood-org/go-expense-tracker/issues)

‎CODE_OF_CONDUCT.md‎

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# Contributor Covenant Code of Conduct
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## Our Pledge
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We as members, contributors, and leaders pledge to make participation in our
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community a harassment-free experience for everyone, regardless of age, body
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size, visible or invisible disability, ethnicity, sex characteristics, gender
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identity and expression, level of experience, education, socio-economic status,
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nationality, personal appearance, race, caste, color, religion, or sexual
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identity and orientation.
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We pledge to act and interact in ways that contribute to an open, welcoming,
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diverse, inclusive, and healthy community.
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## Our Standards
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Examples of behavior that contributes to a positive environment for our
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community include:
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* Demonstrating empathy and kindness toward other people
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* Being respectful of differing opinions, viewpoints, and experiences
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* Giving and gracefully accepting constructive feedback
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* Accepting responsibility and apologizing to those affected by our mistakes,
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and learning from the experience
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* Focusing on what is best not just for us as individuals, but for the overall
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community
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Examples of unacceptable behavior include:
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* The use of sexualized language or imagery, and sexual attention or advances of
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any kind
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* Trolling, insulting or derogatory comments, and personal or political attacks
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* Public or private harassment
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* Publishing others' private information, such as a physical or email address,
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without their explicit permission
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* Other conduct which could reasonably be considered inappropriate in a
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professional setting
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## Enforcement Responsibilities
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Community leaders are responsible for clarifying and enforcing our standards of
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acceptable behavior and will take appropriate and fair corrective action in
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response to any behavior that they deem inappropriate, threatening, offensive,
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or harmful.
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Community leaders have the right and responsibility to remove, edit, or reject
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comments, commits, code, wiki edits, issues, and other contributions that are
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not aligned to this Code of Conduct, and will communicate reasons for moderation
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decisions when appropriate.
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## Scope
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This Code of Conduct applies within all community spaces, and also applies when
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an individual is officially representing the community in public spaces.
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Examples of representing our community include using an official e-mail address,
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posting via an official social media account, or acting as an appointed
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representative at an online or offline event.
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## Enforcement
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Instances of abusive, harassing, or otherwise unacceptable behavior may be
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reported to the community leaders responsible for enforcement through GitHub
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issues or discussions.
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All complaints will be reviewed and investigated promptly and fairly.
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All community leaders are obligated to respect the privacy and security of the
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reporter of any incident.
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## Enforcement Guidelines
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Community leaders will follow these Community Impact Guidelines in determining
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the consequences for any action they deem in violation of this Code of Conduct:
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### 1. Correction
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**Community Impact**: Use of inappropriate language or other behavior deemed
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unprofessional or unwelcome in the community.
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**Consequence**: A private, written warning from community leaders, providing
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clarity around the nature of the violation and an explanation of why the
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behavior was inappropriate. A public apology may be requested.
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### 2. Warning
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**Community Impact**: A violation through a single incident or series of
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actions.
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**Consequence**: A warning with consequences for continued behavior. No
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interaction with the people involved, including unsolicited interaction with
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those enforcing the Code of Conduct, for a specified period of time. This
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includes avoiding interactions in community spaces as well as external channels
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like social media. Violating these terms may lead to a temporary or permanent
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ban.
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### 3. Temporary Ban
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**Community Impact**: A serious violation of community standards, including
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sustained inappropriate behavior.
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**Consequence**: A temporary ban from any sort of interaction or public
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communication with the community for a specified period of time. No public or
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private interaction with the people involved, including unsolicited interaction
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with those enforcing the Code of Conduct, is allowed during this period.
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Violating these terms may lead to a permanent ban.
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### 4. Permanent Ban
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**Community Impact**: Demonstrating a pattern of violation of community
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standards, including sustained inappropriate behavior, harassment of an
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individual, or aggression toward or disparagement of classes of individuals.
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**Consequence**: A permanent ban from any sort of public interaction within the
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community.
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## Attribution
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This Code of Conduct is adapted from the [Contributor Covenant][homepage],
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version 2.1, available at
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[https://www.contributor-covenant.org/version/2/1/code_of_conduct.html][v2.1].
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Community Impact Guidelines were inspired by
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[Mozilla's code of conduct enforcement ladder][Mozilla CoC].
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For answers to common questions about this code of conduct, see the FAQ at
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[https://www.contributor-covenant.org/faq][FAQ]. Translations are available at
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[https://www.contributor-covenant.org/translations][translations].
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[homepage]: https://www.contributor-covenant.org
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[v2.1]: https://www.contributor-covenant.org/version/2/1/code_of_conduct.html
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[Mozilla CoC]: https://github.com/mozilla/diversity
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[FAQ]: https://www.contributor-covenant.org/faq
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[translations]: https://www.contributor-covenant.org/translations

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