## Description
The lambda CLI previously only wrote output to stdout using shell redirection.
This PR adds support for writing results to files using the `-o` flag.
This is implemented using a new `Destination` interface that mirrors the existing `Source` pattern.
Changes:
- Added `Destination` interface with `StdoutDestination` and `FileDestination` implementations.
- Added `-o` flag to CLI argument parser for output file specification.
- Updated `Config` to use `Destination` instead of direct output handling.
- Refactored main to use `Destination.Write()` for result output.
- Updated Makefile targets (`run`, `profile`, `explain`) to use `-o` flag instead of shell redirection.
### Decisions
The `-o` flag defaults to stdout when not specified or when set to `-`.
This maintains backward compatibility while providing explicit file output capability.
## Benefits
- Cleaner command-line interface without shell redirection.
- Symmetric design with `Source` interface for input.
- More portable across different shells and environments.
- Explicit output handling improves code clarity.
## Checklist
- [x] Code follows conventional commit format.
- [x] Branch follows naming convention (`<type>/<description>`).
- [ ] Tests pass (if applicable).
- [ ] Documentation updated (if applicable).
Reviewed-on: #13
Co-authored-by: M.V. Hutz <git@maximhutz.me>
Co-committed-by: M.V. Hutz <git@maximhutz.me>
## Description
The lambda CLI previously only supported inline string expressions and stdin input.
This PR adds support for reading lambda expressions from files using the `-f` flag.
This makes it easier to work with larger programs stored in files.
Changes:
- Added `FileSource` type to `internal/config/source.go` for reading from file paths.
- Added `-f` flag to CLI argument parser with validation to prevent conflicting inputs.
- Updated Makefile targets (`run`, `profile`, `explain`) to use `-f` flag instead of stdin redirection.
### Decisions
The `-f` flag takes precedence over positional arguments.
If both are specified, an error is returned to avoid ambiguity.
## Benefits
- More intuitive workflow for file-based lambda programs.
- Cleaner Makefile targets without stdin redirection.
- Consistent with common CLI conventions (e.g., `grep -f`, `awk -f`).
## Checklist
- [x] Code follows conventional commit format.
- [x] Branch follows naming convention (`<type>/<description>`).
- [ ] Tests pass (if applicable).
- [ ] Documentation updated (if applicable).
Reviewed-on: #12
Co-authored-by: M.V. Hutz <git@maximhutz.me>
Co-committed-by: M.V. Hutz <git@maximhutz.me>
## Description
This PR refactors the Makefile to improve usability, maintainability, and cross-platform compatibility.
The changes modernize the Makefile structure and make it more user-friendly.
Changes made:
- Renamed the `it` target to `build` for better clarity and conventional naming.
- Added a `help` target as the default goal to display available targets and their descriptions.
- Moved the TEST variable to the top with other configuration variables for better organization.
- Updated binary name from `lambda.exe` to `lambda` and used `${BINARY_NAME}` variable consistently throughout.
- Replaced all `@` prefixes with the `.SILENT:` directive for cleaner syntax.
- Added a `clean` target to remove all build artifacts (binary, program.out, profile directory).
- Made the `graph` target cross-platform by replacing macOS-specific `open` command with file:// URL echo.
- Updated .gitignore to include the `lambda` binary.
### Decisions
- Used `.SILENT:` directive instead of individual `@` prefixes for a cleaner, more maintainable Makefile.
- Made `help` the default target so users can run `make` without arguments to see available commands.
- Removed platform-specific commands (like `open`) in favor of cross-platform alternatives.
## Benefits
- Improved discoverability: Users can run `make` to see all available targets.
- Better maintainability: Using `${BINARY_NAME}` variable consistently makes future changes easier.
- Cross-platform compatibility: Removed macOS-specific commands.
- Cleaner syntax: `.SILENT:` directive eliminates repetitive `@` prefixes.
- More conventional: Renamed `it` to `build` follows standard Makefile conventions.
## Checklist
- [x] Code follows conventional commit format.
- [x] Branch follows naming convention (\`<type>/<description>\`). Always use underscores.
- [x] Tests pass (if applicable).
- [x] Documentation updated (if applicable).
Reviewed-on: #11
Co-authored-by: M.V. Hutz <git@maximhutz.me>
Co-committed-by: M.V. Hutz <git@maximhutz.me>
