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renamer/docs/cli-flags.md
2025-10-30 15:15:16 +08:00

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# CLI Scope Flags
Renamer shares a consistent set of scope flags across every command that inspects or mutates the
filesystem. Use these options at the root command level so they apply to all subcommands (`list`,
`replace`, `insert`, `remove`, etc.).
| Flag | Default | Description |
|------|---------|-------------|
| `--path` | `.` | Working directory root for traversal. |
| `-r`, `--recursive` | `false` | Traverse subdirectories depth-first. Symlinked directories are not followed. |
| `-d`, `--include-dirs` | `false` | Include directories in results. |
| `-e`, `--extensions` | *(none)* | Pipe-separated list of file extensions (e.g. `.jpg|.mov`). Tokens must start with a dot, are lowercased internally, and duplicates are ignored. |
| `--hidden` | `false` | Include dot-prefixed files and directories. By default they are excluded from listings and rename previews. |
| `--yes` | `false` | Apply changes without interactive confirmation (mutating commands only). |
| `--dry-run` | `false` | Force preview-only behavior even when `--yes` is supplied. |
| `--format` | `table` | Command-specific output formatting option. For `list`, use `table` or `plain`. |
## Insert Command Quick Reference
```bash
renamer insert <position> <text> [flags]
```
- Position tokens:
- `^` inserts at the beginning of the filename.
- `$` inserts immediately before the extension dot (or end if no extension).
- Positive integers (1-based) count forward from the start of the stem.
- Negative integers count backward from the end of the stem (e.g., `-1` inserts before the last rune).
- Text must be valid UTF-8 without path separators or control characters; Unicode characters are supported.
- Scope flags (`--path`, `-r`, `-d`, `--hidden`, `--extensions`) limit the candidate set before insertion.
- `--dry-run` previews the plan; rerun with `--yes` to apply the same operations.
### Usage Examples
- Preview adding a prefix: `renamer insert ^ "[2025] " --dry-run`
- Append before extension: `renamer insert $ _ARCHIVE --yes --path ./docs`
- Insert after third character in stem: `renamer insert 3 _tag --path ./images --dry-run`
- Combine with extension filter: `renamer insert ^ "v1_" --extensions .txt|.md`
## Remove Command Quick Reference
```bash
renamer remove <token1> [token2 ...] [flags]
```
- Removal tokens are evaluated in the order supplied. Each token deletes literal substrings from the
current filename before the next token runs; results are previewed before any filesystem changes.
- Duplicate tokens are deduplicated automatically and surfaced as warnings so users can adjust
scripts without surprises.
- Tokens that collapse a filename to an empty string are skipped with warnings during preview/apply
to protect against accidental deletion.
- All scope flags (`--path`, `-r`, `-d`, `--hidden`, `-e`) apply, making it easy to target directories,
recurse, and limit removals by extension.
- Use `--dry-run` for automation previews and combine with `--yes` to apply unattended; conflicting
combinations (`--dry-run --yes`) exit with an error to uphold preview-first safety.
### Usage Examples
- Preview sequential removals: `renamer remove " copy" " draft" --dry-run`
- Remove tokens recursively: `renamer remove foo foo- --recursive --path ./reports`
- Combine with extension filters: `renamer remove " Project" --extensions .txt|.md --dry-run`
## Extension Command Quick Reference
```bash
renamer extension <source-ext...> <target-ext> [flags]
```
- Provide one or more dot-prefixed source extensions followed by the target extension. Validation
fails if any token omits the leading dot or repeats the target exactly.
- Source extensions are normalized case-insensitively; duplicates and no-op tokens are surfaced as
warnings in the preview rather than silently ignored.
- Preview output lists every candidate with `changed`, `no change`, or `skipped` status so scripts
can detect conflicts before applying. Conflicting targets block apply and exit with a non-zero
code.
- Scope flags (`--path`, `-r`, `-d`, `--hidden`, `--extensions`) determine which files and
directories participate. Hidden assets remain excluded unless `--hidden` is supplied.
- `--dry-run` (default) prints the plan without touching the filesystem. Re-run with `--yes` to
apply; attempting to combine both flags exits with an error. When no files match, the command
exits `0` after printing “No candidates found.”
### Usage Examples
- Preview normalization: `renamer extension .jpeg .JPG .jpg --dry-run`
- Apply case-folded extension updates: `renamer extension .yaml .yml .yml --yes --path ./configs`
- Include hidden assets recursively: `renamer extension .TMP .tmp --recursive --hidden`