stash.py
python
| 1 | """muse stash — temporarily shelve uncommitted changes. |
| 2 | |
| 3 | Saves the current muse-work/ state to ``.muse/stash.json`` and restores |
| 4 | the HEAD snapshot to muse-work/. |
| 5 | |
| 6 | Usage:: |
| 7 | |
| 8 | muse stash — save current changes and restore HEAD |
| 9 | muse stash pop — restore the most recent stash |
| 10 | muse stash list — list all stash entries |
| 11 | muse stash drop — discard the most recent stash |
| 12 | """ |
| 13 | from __future__ import annotations |
| 14 | |
| 15 | import datetime |
| 16 | import json |
| 17 | import logging |
| 18 | import pathlib |
| 19 | import shutil |
| 20 | from typing import Any |
| 21 | |
| 22 | import typer |
| 23 | |
| 24 | from muse.core.errors import ExitCode |
| 25 | from muse.core.object_store import restore_object, write_object_from_path |
| 26 | from muse.core.repo import require_repo |
| 27 | from muse.core.snapshot import build_snapshot_manifest, compute_snapshot_id |
| 28 | from muse.core.store import get_head_snapshot_manifest, read_snapshot |
| 29 | |
| 30 | logger = logging.getLogger(__name__) |
| 31 | |
| 32 | app = typer.Typer() |
| 33 | |
| 34 | _STASH_FILE = ".muse/stash.json" |
| 35 | |
| 36 | |
| 37 | def _read_branch(root: pathlib.Path) -> str: |
| 38 | head_ref = (root / ".muse" / "HEAD").read_text().strip() |
| 39 | return head_ref.removeprefix("refs/heads/").strip() |
| 40 | |
| 41 | |
| 42 | def _read_repo_id(root: pathlib.Path) -> str: |
| 43 | return str(json.loads((root / ".muse" / "repo.json").read_text())["repo_id"]) |
| 44 | |
| 45 | |
| 46 | def _load_stash(root: pathlib.Path) -> list[dict[str, Any]]: |
| 47 | stash_file = root / _STASH_FILE |
| 48 | if not stash_file.exists(): |
| 49 | return [] |
| 50 | result: list[dict[str, Any]] = json.loads(stash_file.read_text()) |
| 51 | return result |
| 52 | |
| 53 | |
| 54 | def _save_stash(root: pathlib.Path, stash: list[dict[str, Any]]) -> None: |
| 55 | (root / _STASH_FILE).write_text(json.dumps(stash, indent=2)) |
| 56 | |
| 57 | |
| 58 | @app.callback(invoke_without_command=True) |
| 59 | def stash(ctx: typer.Context) -> None: |
| 60 | """Save current muse-work/ changes and restore HEAD.""" |
| 61 | if ctx.invoked_subcommand is not None: |
| 62 | return |
| 63 | root = require_repo() |
| 64 | repo_id = _read_repo_id(root) |
| 65 | branch = _read_branch(root) |
| 66 | workdir = root / "muse-work" |
| 67 | |
| 68 | manifest = build_snapshot_manifest(workdir) |
| 69 | if not manifest: |
| 70 | typer.echo("Nothing to stash.") |
| 71 | return |
| 72 | |
| 73 | snapshot_id = compute_snapshot_id(manifest) |
| 74 | for rel_path, object_id in manifest.items(): |
| 75 | write_object_from_path(root, object_id, workdir / rel_path) |
| 76 | |
| 77 | stash_entry = { |
| 78 | "snapshot_id": snapshot_id, |
| 79 | "manifest": manifest, |
| 80 | "branch": branch, |
| 81 | "stashed_at": datetime.datetime.now(datetime.timezone.utc).isoformat(), |
| 82 | } |
| 83 | entries = _load_stash(root) |
| 84 | entries.insert(0, stash_entry) |
| 85 | _save_stash(root, entries) |
| 86 | |
| 87 | # Restore HEAD |
| 88 | head_manifest = get_head_snapshot_manifest(root, repo_id, branch) or {} |
| 89 | if workdir.exists(): |
| 90 | shutil.rmtree(workdir) |
| 91 | workdir.mkdir() |
| 92 | for rel_path, object_id in head_manifest.items(): |
| 93 | restore_object(root, object_id, workdir / rel_path) |
| 94 | |
| 95 | typer.echo(f"Saved working directory (stash@{{0}})") |
| 96 | |
| 97 | |
| 98 | @app.command("pop") |
| 99 | def stash_pop() -> None: |
| 100 | """Restore the most recent stash.""" |
| 101 | root = require_repo() |
| 102 | entries = _load_stash(root) |
| 103 | if not entries: |
| 104 | typer.echo("No stash entries.") |
| 105 | raise typer.Exit(code=ExitCode.USER_ERROR) |
| 106 | |
| 107 | entry = entries.pop(0) |
| 108 | _save_stash(root, entries) |
| 109 | |
| 110 | workdir = root / "muse-work" |
| 111 | if workdir.exists(): |
| 112 | shutil.rmtree(workdir) |
| 113 | workdir.mkdir() |
| 114 | for rel_path, object_id in entry["manifest"].items(): |
| 115 | restore_object(root, object_id, workdir / rel_path) |
| 116 | |
| 117 | typer.echo(f"Restored stash@{{0}} (branch: {entry['branch']})") |
| 118 | |
| 119 | |
| 120 | @app.command("list") |
| 121 | def stash_list() -> None: |
| 122 | """List all stash entries.""" |
| 123 | root = require_repo() |
| 124 | entries = _load_stash(root) |
| 125 | if not entries: |
| 126 | typer.echo("No stash entries.") |
| 127 | return |
| 128 | for i, entry in enumerate(entries): |
| 129 | typer.echo(f"stash@{{{i}}}: WIP on {entry['branch']} — {entry['stashed_at']}") |
| 130 | |
| 131 | |
| 132 | @app.command("drop") |
| 133 | def stash_drop() -> None: |
| 134 | """Discard the most recent stash entry.""" |
| 135 | root = require_repo() |
| 136 | entries = _load_stash(root) |
| 137 | if not entries: |
| 138 | typer.echo("No stash entries.") |
| 139 | raise typer.Exit(code=ExitCode.USER_ERROR) |
| 140 | entries.pop(0) |
| 141 | _save_stash(root, entries) |
| 142 | typer.echo("Dropped stash@{0}") |