chore: project skeleton — module contracts, docs plan, GPLv3

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loki5512344 2026-09-09 21:43:42 +02:00
commit a33ed2eb30
Signed by: boba
GPG key ID: 253067914055423B
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@ -0,0 +1,20 @@
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674
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DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# jmove
**Move source files. Keep every import intact.**
`jmove` is a fast, single-binary CLI that moves/renames source files in a
project and rewrites all import statements that reference them — no IDE,
no language server, no runtime dependencies. Built for humans *and* AI
agents.
## Why
`git mv` moves the file but breaks every relative import pointing at it.
IDE renames fix imports but need an IDE. Existing CLI alternatives either
shell out to heavy language servers (bun/ts-morph, Rope, gopls,
rust-analyzer) or refuse to preview what they will change.
jmove's answer:
- **Dry-run + unified diff** — see every change before it hits disk.
- **Atomic apply with rollback** — imports are rewritten first, the file
moves last; any failure restores everything.
- **AI-agent mode** — `--json` everywhere, stable error codes, exit codes,
and a machine-readable skill doc (`docs/SKILL.md`).
- **Pure Rust, one binary** — no external toolchains to install.
- **Java support** — the package/directory coupling nobody else automates
outside IntelliJ.
## Install
```sh
cargo install jmove
```
## Usage
```sh
# Preview what a move would change
jmove mv src/utils/parser.ts src/core/parser.ts --dry-run
# Apply it
jmove mv src/utils/parser.ts src/core/parser.ts
# Java: jmove updates `package`, all `import`s and moves the file
jmove mv src/com/example/utils/Parser.java src/com/example/core/Parser.java
# Find broken imports (exit code 2 if any)
jmove check
# AI-agent workflow
jmove mv src/foo.ts src/bar/foo.ts --dry-run --json
jmove mv src/foo.ts src/bar/foo.ts --json
jmove check --json
```
See [docs/EXAMPLES.md](docs/EXAMPLES.md) for more, and
[docs/SKILL.md](docs/SKILL.md) if you are an AI agent.
## Roadmap
TypeScript/JavaScript first, then Java (open niche), Python, Go.
`split` (automatic file decomposition) is planned — no tool does it.
Full plan: [docs/PLAN.md](docs/PLAN.md).
## License
GPL-3.0-only. See [LICENSE](LICENSE).

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# jmove — Product Plan
## Vision
The `mv` for source code that never breaks imports: fast, safe (dry-run +
atomic rollback), single static Rust binary — usable by humans in a
terminal and by AI agents over `--json`, with zero external toolchains.
## Competitive landscape
The closest analog is **refac / ai_refac** (github: jav-ed/ai_refac):
moves sources and updates imports/paths across the project, aimed at
AI agents without an IDE.
| | refac/ai_refac | jmove |
|---|---|---|
| Languages | TS/JS (ts-morph+Bun), Python (Rope), Rust (rust-analyzer LSP), Go (gopls), Dart, Markdown | TS/JS → Java → Python/Go |
| Under the hood | spawns external toolchains/LSPs per run | pure Rust, tree-sitter grammars in-process |
| Dry-run | **none** — writes straight to disk | core feature, unified diff |
| Atomicity/rollback | not described | rewrite-then-move, rollback on failure |
| TS limit | 30 files per call | none (index-based) |
| Go behaviour | moves whole package for any file | per-file moves |
| Java | not supported, not planned | **open niche — headline feature** |
| UX | agent-oriented CLI | human UX + first-class `--json` agent mode |
**Conclusion:** the idea is validated, the product is not. jmove wins on
dry-run, speed (no LSP startup), human UX, single-binary distribution,
the `split` command (nobody has it) and Java.
## Why Java is the wedge
Java imports are fully-qualified package paths hard-coupled to directory
layout:
```
src/com/example/utils/Parser.java
→ package com.example.utils; // must change
→ import com.example.utils.Parser; // must change in every importer
→ + physical file move
```
Three coordinated edits per move; outside IntelliJ nobody automates it.
In headless/CI/agent contexts there is no IntelliJ. Implementation:
tree-sitter Java grammar (mature) + directory⇄package convention +
source-root detection (`src/main/java`, `src/`, ...). This is the feature
that makes jmove *the* answer for "move a Java file in CI".
## AI-agent design
Existing tools ship a raw `.agents/skills/` folder; we do it properly:
- `--json` on every command. Envelope:
`{ "status": "ok" | "dry_run" | "error", "operation": "...", ... }`
- Stable error codes + actionable hints:
`{ "status":"error", "code":"TARGET_EXISTS", "message":"...", "hint":"Use --force or choose another target" }`
- `mv --dry-run --json` → `{ would_move, would_update, affected_files }`
so agents preview → confirm → apply → `check --json`.
- Exit codes: `0` ok · `1` error · `2` broken imports (from `check`).
- `docs/SKILL.md` — machine-readable instructions an agent can drop into
context: short, no fluff, workflow-first.
## Correctness principles
1. Rewrite **only the specifier string** (byte span), never reformat the
statement — no formatter dependency, minimal diffs.
2. Resolution must match the language's own lookup: TS extension guessing
+ `index.*`; Java package⇄path; (Phase 2) tsconfig `paths` aliases.
3. Imports are rewritten **before** the move; any error rolls back all
writes. Prefer `git mv` when inside a repo to preserve history.
4. Beyond imports, warn (don't silently rewrite) about other references:
`package.json` exports, jest mocks, `tsconfig` includes, markdown links.
## Phases
- **Phase 1 (MVP)** — as in `todo.md`: TS/JS scan+index, graph, mv with
dry-run/atomic apply. Add to MVP: relative-path resolution incl.
`index.*` (without it the tool is toy-grade); `check` as the self-test.
- **Phase 1.5 — Java.** The differentiator, as soon as the TS pipeline is
proven. Also: `--json` + SKILL.md ship *with* Java, not after.
- **Phase 2** — disk index cache (`.jmove/`), incremental reindex,
tsconfig paths, rayon parallelism, `--git` integration.
- **Phase 3** — Python, Go (per-file, unlike refac), `split` command.
- **Later** — LSP server mode (become the thing refac spawns), watch mode,
VS Code wrapper.
## Rules (binding, see todo.md)
KISS · DRY · SOLID · ≤250 lines/file · ≤4 files/folder · fmt+clippy
`-D warnings` per commit · no dead code, no `#[allow(dead_code)]` ·
English Javadoc-style comments on all public API.

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# jmove skill (for AI agents)
## What this tool does
Moves or renames source files inside a project and updates every import
statement referencing them. Never breaks imports. Supported: TypeScript,
JavaScript; Java/Python/Go on the roadmap. Single binary, no LSP needed.
## When to use
- The user asks to move/rename/reorganize source files or packages.
- You refactored a directory layout and imports now point at nothing.
- You need to verify the project has no broken imports (`check`).
## Commands
### mv — move a file and rewrite its importers
```
jmove mv <source> <target> [--root DIR] [--dry-run] [--json] [--force]
```
Always run `--dry-run` first and confirm the change set looks right.
### check — find broken imports
```
jmove check [--root DIR] [--json]
```
Run after any move (or any edit) to validate project consistency.
## Recommended agent workflow
1. `jmove mv <src> <target> --dry-run --json` — preview.
2. Inspect `affected_files`; if unexpected, abort and ask the user.
3. `jmove mv <src> <target> --json` — apply (atomic, rolls back on error).
4. `jmove check --json` — verify nothing is broken.
## Output format (--json)
Every response: `{ "status": "ok" | "dry_run" | "error", "operation": "...", ... }`.
Errors carry a stable `code` (`TARGET_EXISTS`, `SOURCE_NOT_FOUND`, ...)
and a `hint` describing the next action. On success, `mv` reports
`changed_files` with line-level `old`/`new` import diffs and counters
(`moved`, `updated_imports`).
## Exit codes
- `0` — success
- `1` — operation failed (read `--json` error or stderr)
- `2` — `check` found broken imports
## Rules of use
- Never run `mv` without a prior `--dry-run` in the same session.
- Never pass `--force` unless the user explicitly authorized overwriting.
- After every successful `mv`, run `check`; treat exit code `2` as
a failed refactor.

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//! On-disk index cache.
//!
//! Intentionally empty in Phase 1: the project is rescanned on every run.
//! Phase 2 will persist the import graph under `.jmove/` and support
//! incremental reindexing (see `todo.md`).

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//! JSON output shapes shared by all `--json` commands.
//!
//! Every response is an [`Envelope`] whose `status` is one of
//! `"ok" | "dry_run" | "error"`, plus a machine-readable error `code`
//! and a human `hint` on failure (see `docs/SKILL.md`).
use serde::Serialize;
/// Top-level envelope for every `--json` response.
#[derive(Debug, Serialize)]
pub struct Envelope<T: Serialize> {
/// One of `"ok"`, `"dry_run"`, `"error"`.
pub status: &'static str,
/// The operation that produced this response, e.g. `"mv"`, `"check"`.
pub operation: &'static str,
/// Command-specific payload.
#[serde(flatten)]
pub data: T,
}
/// Error payload: stable `code`, human `message`, actionable `hint`.
#[derive(Debug, Serialize)]
pub struct ErrorData {
/// Machine-readable code, e.g. `TARGET_EXISTS`, `SOURCE_NOT_FOUND`.
pub code: String,
/// Human-readable explanation.
pub message: String,
/// What the caller should do next (never null in output; omit if none).
pub hint: Option<String>,
}
/// Serialize `value` as pretty JSON to stdout.
pub fn print<T: Serialize>(value: &T) {
let _ = value;
todo!("cli agent: println!(serde_json::to_string_pretty)")
}

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//! Command line interface: argument parsing, dispatch and exit codes.
//!
//! Exit codes (mirrored in `docs/SKILL.md`):
//! `0` success · `1` operation error · `2` broken imports found.
pub mod json;
use std::path::PathBuf;
use clap::{Parser, Subcommand};
/// jmove — move source files, keep every import intact.
#[derive(Debug, Parser)]
#[command(name = "jmove", version, about, long_about = None)]
pub struct Args {
/// Subcommand to execute.
#[command(subcommand)]
pub command: Command,
/// Project root (defaults to the current directory).
#[arg(long, global = true, default_value = ".")]
pub root: PathBuf,
}
/// Available subcommands (MVP: `mv`, `check`).
#[derive(Debug, Subcommand)]
pub enum Command {
/// Move a file and rewrite all imports referencing it.
Mv {
/// File being moved (project-relative or inside the root).
source: PathBuf,
/// Destination path.
target: PathBuf,
/// Preview changes without touching the disk.
#[arg(long)]
dry_run: bool,
/// Machine-readable JSON output (for AI agents).
#[arg(long)]
json: bool,
/// Allow overwriting an existing target file.
#[arg(long)]
force: bool,
},
/// Report broken imports in the project.
Check {
/// Machine-readable JSON output.
#[arg(long)]
json: bool,
},
}
/// Process exit codes documented for humans and agents alike.
pub mod exit {
/// Operation completed successfully.
pub const OK: i32 = 0;
/// Invalid usage, rejected plan or IO failure.
pub const ERROR: i32 = 1;
/// `check` found at least one broken import.
pub const BROKEN: i32 = 2;
}
/// Parse arguments and run the selected command.
/// Returns the process exit code; `Err` is reserved for unexpected failures.
pub fn run() -> anyhow::Result<i32> {
let args = Args::parse();
match args.command {
Command::Mv {
source,
target,
dry_run,
json,
force,
} => mv(&args.root, &source, &target, dry_run, json, force),
Command::Check { json } => check(&args.root, json),
}
}
/// `mv` handler: build index, plan, then dry-run-print or apply.
fn mv(
root: &Path,
source: &Path,
target: &Path,
dry_run: bool,
json: bool,
force: bool,
) -> anyhow::Result<i32> {
let _ = (root, source, target, dry_run, json, force);
todo!("cli agent: wire mv to core::index/plan/apply")
}
/// `check` handler: report imports that resolve to nothing.
fn check(root: &Path, json: bool) -> anyhow::Result<i32> {
let _ = (root, json);
todo!("cli agent: wire check to core::index")
}
use std::path::Path;

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//! Atomic apply with rollback, plus unified-diff rendering for dry-run.
//!
//! Order matters: specifier rewrites are applied to importer files first
//! (each written atomically via temp-file + rename), and the actual
//! `source -> target` rename happens last. Any failure mid-way triggers
//! rollback of everything already written.
use std::path::Path;
use crate::core::JmoveResult;
use crate::core::plan::MovePlan;
/// Summary of a successfully applied plan.
#[derive(Debug, Clone)]
pub struct Applied {
/// Number of files whose imports were rewritten.
pub files_rewritten: usize,
/// The moved file's new project-relative path.
pub new_path: std::path::PathBuf,
}
/// Apply `plan` under `root` atomically (see module docs). Rollback is
/// best-effort: on restore failure the error message states which files
/// need manual recovery.
pub fn apply(root: &Path, plan: &MovePlan) -> JmoveResult<Applied> {
let _ = (root, plan);
todo!("index agent: atomic apply + rollback")
}
/// Render the plan as a unified diff (rewrites + file rename) for dry-run.
#[must_use]
pub fn render_diff(root: &Path, plan: &MovePlan) -> JmoveResult<String> {
let _ = (root, plan);
todo!("index agent: diff rendering via `similar`")
}

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//! Project indexing: gitignore-aware filesystem scan plus the import graph.
//!
//! Built fresh on every command (disk cache is Phase 2). `ignore::WalkBuilder`
//! handles `.gitignore`/hidden-file rules; every indexed TS/JS source file is
//! parsed through [`crate::parser`] and its specifiers resolved through
//! [`crate::parser::resolve`].
use std::collections::{HashMap, HashSet};
use std::path::{Path, PathBuf};
use crate::core::JmoveResult;
use crate::parser::ImportRecord;
/// Indexed source files with O(1) membership lookups.
#[derive(Debug, Default)]
pub struct FileSet {
paths: HashSet<PathBuf>,
}
impl FileSet {
/// Add a normalized project-relative path; `false` if already present.
pub fn add(&mut self, path: PathBuf) -> bool {
self.paths.insert(path)
}
/// Whether `path` is a known indexed source file.
#[must_use]
pub fn contains(&self, path: &Path) -> bool {
self.paths.contains(path)
}
/// All files in deterministic sorted order (stable for tests and diffs).
#[must_use]
pub fn sorted(&self) -> Vec<PathBuf> {
let mut v: Vec<PathBuf> = self.paths.iter().cloned().collect();
v.sort();
v
}
}
/// One import occurrence plus the project file it resolves to.
/// `target: None` means "external" — a bare package specifier or a path
/// that does not exist in the index.
#[derive(Debug, Clone)]
pub struct ResolvedImport {
/// Raw record from the parser (specifier text + byte span).
pub record: ImportRecord,
/// Project-relative resolved file, if any.
pub target: Option<PathBuf>,
}
/// Full in-memory project index: file set and forward import edges.
#[derive(Debug, Default)]
pub struct Index {
/// Absolute project root the index was built for.
pub root: PathBuf,
/// All indexed source files.
pub files: FileSet,
/// For each file, the imports it declares (in source order).
pub imports: HashMap<PathBuf, Vec<ResolvedImport>>,
}
impl Index {
/// Scan `root`, parse every supported source file and build the graph.
/// Unparseable files are skipped, not fatal.
pub fn build(root: &Path) -> JmoveResult<Self> {
let _ = root;
todo!(
"index agent: scan with `ignore`, parse via crate::parser, resolve via parser::resolve"
)
}
/// Reverse edge lookup: every indexed file that imports `target`.
#[must_use]
pub fn importers_of(&self, target: &Path) -> Vec<PathBuf> {
let _ = target;
todo!("index agent: reverse-edge lookup")
}
}

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//! Core engine: project indexing, dependency graph, move planning and
//! atomic apply with rollback.
//!
//! Path convention used across the crate: every `PathBuf` produced by
//! `jmove` is **project-root-relative, normalized** (no `.`/`..` segments).
//! Use [`normalize_rel_path`] to canonicalize paths coming from users or
//! from OS walking.
pub mod apply;
pub mod index;
pub mod plan;
use std::ffi::OsStr;
use std::io;
use std::path::{Component, Path, PathBuf};
use thiserror::Error;
/// Crate-wide error type surfaced to the CLI layer.
#[derive(Debug, Error)]
pub enum JmoveError {
/// Filesystem or IO failure.
#[error("io error: {0}")]
Io(#[from] io::Error),
/// The user supplied a path that is invalid for the requested operation.
#[error("invalid argument: {0}")]
InvalidArgument(String),
/// Project index is stale (a file vanished or was moved externally).
#[error("index is stale: {0}")]
StaleIndex(String),
/// The planned move cannot be applied safely.
#[error("plan rejected: {0}")]
PlanRejected(String),
}
/// Result alias used throughout the crate.
pub type JmoveResult<T> = Result<T, JmoveError>;
/// Normalize a project-relative path: strip `.` segments, collapse `..`
/// where possible and reject paths that escape the project root.
/// Returns `None` if the result would be empty, absolute or above the root.
///
/// # Examples
///
/// ```
/// use std::path::Path;
/// use jmove::core::normalize_rel_path;
///
/// assert_eq!(
/// normalize_rel_path(Path::new("./src/../utils/foo.ts")),
/// Some(PathBuf::from("utils/foo.ts"))
/// );
/// assert_eq!(normalize_rel_path(Path::new("../outside")), None);
/// ```
#[must_use]
pub fn normalize_rel_path(path: &Path) -> Option<PathBuf> {
let mut stack: Vec<&OsStr> = Vec::new();
for comp in path.components() {
match comp {
Component::CurDir => {}
Component::ParentDir => {
if stack.pop().is_none() {
return None; // would escape the project root
}
}
Component::Normal(piece) => stack.push(piece),
// Absolute paths and Windows prefixes are not project-relative.
Component::RootDir | Component::Prefix(_) => return None,
}
}
(!stack.is_empty()).then(|| stack.iter().collect::<PathBuf>())
}
#[cfg(test)]
mod tests {
use super::normalize_rel_path;
use std::path::{Path, PathBuf};
#[test]
fn normalizes_dots_and_parent_dirs() {
assert_eq!(
normalize_rel_path(Path::new("./src/../utils/foo.ts")),
Some(PathBuf::from("utils/foo.ts"))
);
assert_eq!(
normalize_rel_path(Path::new("a/b/c/../../d.ts")),
Some(PathBuf::from("a/d.ts"))
);
}
#[test]
fn rejects_escaping_and_empty_paths() {
assert_eq!(normalize_rel_path(Path::new("../outside")), None);
assert_eq!(normalize_rel_path(Path::new("a/../../outside")), None);
assert_eq!(normalize_rel_path(Path::new("")), None);
assert_eq!(normalize_rel_path(Path::new("./")), None);
}
#[test]
fn rejects_absolute_paths() {
assert_eq!(normalize_rel_path(Path::new("/etc/passwd")), None);
}
}

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//! Move planning: decide which import specifiers must be rewritten.
//!
//! A plan is pure data (no disk writes), so dry-run and `--json` can render
//! it without touching the filesystem.
use std::ops::Range;
use std::path::Path;
use std::path::PathBuf;
use crate::core::JmoveResult;
use crate::core::index::Index;
/// One in-file replacement of an import specifier. Only the specifier text
/// between the quotes is touched — the statement layout is never reformatted.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Rewrite {
/// Project-relative file to modify.
pub file: PathBuf,
/// Byte range of the old specifier text (without quotes).
pub span: Range<usize>,
/// Specifier as currently written.
pub old_text: String,
/// Specifier after the move.
pub new_text: String,
}
/// Complete plan for moving `source` to `target`.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct MovePlan {
/// Project-relative path being moved.
pub source: PathBuf,
/// Project-relative destination path.
pub target: PathBuf,
/// Specifier rewrites, grouped per importer file.
pub rewrites: Vec<Rewrite>,
}
/// Compute the rewrite plan for `source -> target`.
///
/// Every indexed import whose resolved target is `source` gets a new
/// relative specifier computed from the *importer's* directory to `target`.
/// Rewrites whose result equals the old specifier are dropped.
pub fn plan_move(index: &Index, source: &Path, target: &Path) -> JmoveResult<MovePlan> {
let _ = (index, source, target);
todo!("index agent: implement planner incl. relative-specifier math")
}

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//! `jmove` — a project-aware file mover for TypeScript/JavaScript.
//!
//! Moving a file inside a project invalidates every relative import that
//! points at it. `jmove` indexes the project's import graph, computes the
//! minimal set of specifier rewrites, and applies everything atomically
//! (with rollback), optionally in dry-run mode.
//!
//! Module map:
//! - [`cli`] — argument parsing, command dispatch, user-facing output.
//! - [`core`] — indexing, dependency graph, move planning, atomic apply.
//! - [`parser`] — language frontends (import extraction, path resolution).
//! - [`cache`] — on-disk index cache (Phase 2, intentionally empty for now).
pub mod cache;
pub mod cli;
pub mod core;
pub mod parser;

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//! Binary entry point for `jmove`.
//!
//! All logic lives in the library crate; this main only maps the outcome of
//! [`jmove::cli::run`] onto process exit codes:
//! - `0` — success,
//! - `1` — user-facing plan/validation error (already printed),
//! - `2` — unexpected failure.
/// Parses arguments, runs the selected command and converts failures into a
/// non-zero exit code, printing a one-line message for the user.
fn main() {
match jmove::cli::run() {
Ok(code) => std::process::exit(code),
Err(err) => {
eprintln!("jmove: {err}");
std::process::exit(2);
}
}
}

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//! Language frontends: import extraction and module specifier resolution.
//!
//! ## Contract (stable across submodules — implementers must not change it)
//!
//! - A [`Language`] parses one source file into [`ImportRecord`]s: every
//! *static-ish* module reference (TS `import`/`export from`/`require`/
//! dynamic `import()`).
//! - [`crate::core::parser_support::resolve`] turns a specifier into a
//! project-relative file path using a resolver aware of the indexed file
//! set. Non-project (package/bare) specifiers resolve to `None`.
//! - Rewrites must touch **only the specifier string**, never the rest of
//! the statement (KISS + no formatter dependency): that is why
//! [`ImportRecord::span`] is a byte range into the original source.
use std::path::Path;
pub mod resolve;
pub mod ts;
/// Source languages `jmove` understands (Phase 1: TypeScript/JavaScript).
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum SourceLanguage {
/// `.ts` (non-TSX) sources.
TypeScript,
/// `.tsx` / `.jsx` sources.
Tsx,
/// Plain `.js` / `.mjs` / `.cjs` sources.
JavaScript,
}
impl SourceLanguage {
/// Map a file extension (lowercase, no dot) to a language, if supported.
#[must_use]
pub fn from_extension(ext: &str) -> Option<Self> {
match ext {
"ts" | "mts" | "cts" => Some(Self::TypeScript),
"tsx" | "jsx" => Some(Self::Tsx),
"js" | "mjs" | "cjs" => Some(Self::JavaScript),
_ => None,
}
}
/// Detect the language from a file name. `None` means "not a source file
/// we index" (skip it).
#[must_use]
pub fn for_path(path: &Path) -> Option<Self> {
Self::from_extension(
path.extension()
.and_then(|e| e.to_str())
.map(str::to_ascii_lowercase)
.as_deref()?,
)
}
}
/// One module reference found in a source file.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ImportRecord {
/// Raw specifier text as written, e.g. `"../utils/format"`.
pub specifier: String,
/// Byte range of the *specifier string contents* (inside the quotes,
/// without the quote characters) in the parsed file. The rewriter
/// replaces exactly this span and nothing else.
pub span: std::ops::Range<usize>,
/// `true` for dynamic `import("...")` / `require("...")` occurrences.
pub is_dynamic: bool,
}
/// A language frontend that extracts imports from source text.
pub trait Language: Send + Sync {
/// The language this frontend handles.
fn language(&self) -> SourceLanguage;
/// Extract all import records from `source` in byte-offset order.
/// Parse errors must not be fatal: return what was understood.
fn extract_imports(&self, source: &str) -> Vec<ImportRecord>;
}
/// Build the default frontend for `lang`.
#[must_use]
pub fn frontend_for(lang: SourceLanguage) -> Box<dyn Language> {
Box::new(ts::TreeSitterTs::new(lang))
}

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//! Module specifier resolution for TS/JS projects.
//!
//! CONTRACT: see [`crate::parser`]. Given a *relative* specifier and the
//! importing file, find which indexed project file it refers to. Bare /
//! package specifiers (not starting with `.`) are out of project scope and
//! resolve to `None`.
use std::path::{Path, PathBuf};
use crate::core::index::FileSet;
/// Resolve `specifier` (e.g. `"../utils/fmt"`) written in the file at
/// `importer` (project-relative), against the indexed `files`.
///
/// Resolution order for extensionless specifiers (Node/TS classic):
/// 1. exact path if indexed (e.g. `"./a.ts"`),
/// 2. `<base>` + each supported extension (`.ts`, `.tsx`, `.js`, `.jsx`,
/// `.mjs`, `.cjs` — declaration files only when nothing else matches),
/// 3. `<base>/index.<ext>`.
///
/// Returns `None` for bare specifiers or unresolvable paths.
#[must_use]
pub fn resolve_module(importer: &Path, specifier: &str, files: &FileSet) -> Option<PathBuf> {
let _ = (importer, specifier, files);
todo!("parser agent: implement resolver")
}

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//! Tree-sitter based frontend for TypeScript/JavaScript.
//!
//! CONTRACT: see [`crate::parser`]. Implement `extract_imports` using
//! `tree-sitter-typescript` grammars.
use super::{ImportRecord, Language, SourceLanguage};
/// Frontend backed by the tree-sitter TypeScript/TSX/JS grammar.
pub struct TreeSitterTs {
lang: SourceLanguage,
}
impl TreeSitterTs {
/// Create a frontend for the given language variant.
#[must_use]
pub fn new(lang: SourceLanguage) -> Self {
Self { lang }
}
}
impl Language for TreeSitterTs {
fn language(&self) -> SourceLanguage {
self.lang
}
fn extract_imports(&self, _source: &str) -> Vec<ImportRecord> {
todo!("parser agent: implement tree-sitter extraction")
}
}

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# jmove — TODO
## Правила
- KISS — simplest solution that works; no speculative abstractions.
- DRY — no duplicated logic; extract into a function/module instead.
- SOLID — single responsibility per module (`cli`/`core`/`parser`/`cache`), open for extension (new languages) via the parser trait, no deps on implementation details.
- Max 250 lines per file — split when exceeded.
- Max 4 files per folder (module) — split the module when exceeded.
- Каждый коммит проходит `cargo fmt --check` и `cargo clippy -- -D warnings`.
- Запрещён mёртвый код: unused code удаляется или реализуется; `#[allow(dead_code)]` не использовать.
## MVP (Phase 1)
- [ ] CLI skeleton (clap) — команды: mv, index, check, --dry-run
- [ ] Сканер файлов проекта (уважать .gitignore через `ignore` крейт)
- [ ] Парсер импортов для TypeScript/JS через tree-sitter
- [ ] Построение графа зависимостей (файл → что импортирует)
- [ ] Инвертированный граф (файл → кто его импортирует)
- [ ] Вычисление нового относительного пути после mv
- [ ] Rewrite импортов в файлах
- [ ] Атомарный apply (сначала rewrite, потом mv) + rollback при ошибке
- [ ] Dry-run режим с diff выводом
## Phase 2
- [ ] Кэш индекса на диске (bincode/rkyv) → .jmove/index
- [ ] Инкрементальная переиндексация (только изменённые файлы)
- [ ] Поддержка tsconfig paths / алиасов (@/...)
- [ ] Параллельная индексация через rayon
## Phase 3
- [ ] Поддержка Python
- [ ] Поддержка Java
- [ ] Поддержка Go
- [ ] Команда split (авто-разбивка файла на несколько)
- [ ] Команда check (найти все битые импорты)
## Идеи на потом
- [ ] LSP интеграция
- [ ] Watch mode
- [ ] VS Code расширение как обёртка над CLI