note_log.py
python
| 1 | """muse note-log — note-level commit history for a MIDI track. |
| 2 | |
| 3 | Walks the commit history and shows exactly which notes were added and |
| 4 | removed in each commit that touched a specific MIDI track. Every change |
| 5 | is expressed in musical notation, not as a binary blob diff. |
| 6 | |
| 7 | Usage:: |
| 8 | |
| 9 | muse note-log tracks/melody.mid |
| 10 | muse note-log tracks/melody.mid --from HEAD~10 |
| 11 | muse note-log tracks/melody.mid --json |
| 12 | |
| 13 | Output:: |
| 14 | |
| 15 | Note history: tracks/melody.mid |
| 16 | Commits analysed: 12 |
| 17 | |
| 18 | cb4afaed 2026-03-16 "Perf: vectorise melody" (3 changes) |
| 19 | + C4 vel=80 @beat=1.00 dur=1.00 ch 0 |
| 20 | + E4 vel=75 @beat=2.00 dur=0.50 ch 0 |
| 21 | - D4 vel=72 @beat=2.00 dur=0.50 ch 0 (removed) |
| 22 | |
| 23 | 1d2e3faa 2026-03-15 "Add bridge section" (4 changes) |
| 24 | + A4 vel=78 @beat=9.00 dur=1.00 ch 0 |
| 25 | + B4 vel=75 @beat=10.00 dur=1.00 ch 0 |
| 26 | ... |
| 27 | """ |
| 28 | from __future__ import annotations |
| 29 | |
| 30 | import json |
| 31 | import logging |
| 32 | import pathlib |
| 33 | |
| 34 | import typer |
| 35 | |
| 36 | from muse.core.errors import ExitCode |
| 37 | from muse.core.repo import require_repo |
| 38 | from muse.core.store import resolve_commit_ref |
| 39 | from muse.domain import DomainOp |
| 40 | from muse.plugins.music._query import ( |
| 41 | NoteInfo, |
| 42 | load_track, |
| 43 | walk_commits_for_track, |
| 44 | ) |
| 45 | from muse.plugins.music.midi_diff import NoteKey, _note_summary, extract_notes |
| 46 | from muse.core.object_store import read_object |
| 47 | |
| 48 | logger = logging.getLogger(__name__) |
| 49 | |
| 50 | app = typer.Typer() |
| 51 | |
| 52 | |
| 53 | def _read_repo_id(root: pathlib.Path) -> str: |
| 54 | return str(json.loads((root / ".muse" / "repo.json").read_text())["repo_id"]) |
| 55 | |
| 56 | |
| 57 | def _read_branch(root: pathlib.Path) -> str: |
| 58 | head_ref = (root / ".muse" / "HEAD").read_text().strip() |
| 59 | return head_ref.removeprefix("refs/heads/").strip() |
| 60 | |
| 61 | |
| 62 | def _flat_ops(ops: list[DomainOp]) -> list[DomainOp]: |
| 63 | """Flatten PatchOp child_ops for the given track.""" |
| 64 | result: list[DomainOp] = [] |
| 65 | for op in ops: |
| 66 | if op["op"] == "patch": |
| 67 | result.extend(op["child_ops"]) |
| 68 | else: |
| 69 | result.append(op) |
| 70 | return result |
| 71 | |
| 72 | |
| 73 | @app.callback(invoke_without_command=True) |
| 74 | def note_log( |
| 75 | ctx: typer.Context, |
| 76 | track: str = typer.Argument(..., metavar="TRACK", help="Workspace-relative path to a .mid file."), |
| 77 | from_ref: str | None = typer.Option( |
| 78 | None, "--from", metavar="REF", |
| 79 | help="Start walking from this commit (default: HEAD).", |
| 80 | ), |
| 81 | max_commits: int = typer.Option( |
| 82 | 50, "--max", "-n", metavar="N", |
| 83 | help="Maximum number of commits to walk (default: 50).", |
| 84 | ), |
| 85 | as_json: bool = typer.Option(False, "--json", help="Emit results as JSON."), |
| 86 | ) -> None: |
| 87 | """Show the note-level commit history for a MIDI track. |
| 88 | |
| 89 | ``muse note-log`` walks the commit history and, for each commit that |
| 90 | touched *TRACK*, shows exactly which notes were added and removed — |
| 91 | expressed in musical notation (pitch name, beat position, velocity, |
| 92 | duration), not as a binary diff. |
| 93 | |
| 94 | This is the music-domain equivalent of ``muse symbol-log``: a |
| 95 | semantic history of a single artefact, at the level of individual notes. |
| 96 | |
| 97 | Use ``--from`` to start at a different point in history. Use ``--json`` |
| 98 | to pipe the output to an agent for further processing. |
| 99 | """ |
| 100 | root = require_repo() |
| 101 | repo_id = _read_repo_id(root) |
| 102 | branch = _read_branch(root) |
| 103 | |
| 104 | start_commit = resolve_commit_ref(root, repo_id, branch, from_ref) |
| 105 | if start_commit is None: |
| 106 | typer.echo(f"❌ Commit '{from_ref or 'HEAD'}' not found.", err=True) |
| 107 | raise typer.Exit(code=ExitCode.USER_ERROR) |
| 108 | |
| 109 | commits_with_manifest = walk_commits_for_track( |
| 110 | root, start_commit.commit_id, track, max_commits=max_commits |
| 111 | ) |
| 112 | |
| 113 | # Collect events: (commit, note_summary, op_kind) per commit that touched the track. |
| 114 | EventEntry = tuple[str, str, str, str, str, list[tuple[str, str]]] |
| 115 | events: list[EventEntry] = [] |
| 116 | |
| 117 | for commit, manifest in commits_with_manifest: |
| 118 | if commit.structured_delta is None: |
| 119 | continue |
| 120 | # Find the PatchOp for this track. |
| 121 | track_ops: list[DomainOp] = [] |
| 122 | for op in commit.structured_delta["ops"]: |
| 123 | if op["address"] == track: |
| 124 | if op["op"] == "patch": |
| 125 | track_ops.extend(op["child_ops"]) |
| 126 | else: |
| 127 | # File-level insert/delete/replace — not note-level. |
| 128 | track_ops.append(op) |
| 129 | |
| 130 | if not track_ops: |
| 131 | continue |
| 132 | |
| 133 | note_changes: list[tuple[str, str]] = [] |
| 134 | for op in track_ops: |
| 135 | if op["op"] == "insert": |
| 136 | note_changes.append(("+", op.get("content_summary", op["address"]))) |
| 137 | elif op["op"] == "delete": |
| 138 | note_changes.append(("-", op.get("content_summary", op["address"]))) |
| 139 | |
| 140 | if note_changes: |
| 141 | date_str = commit.committed_at.strftime("%Y-%m-%d") |
| 142 | events.append(( |
| 143 | commit.commit_id[:8], |
| 144 | date_str, |
| 145 | commit.message, |
| 146 | commit.author or "unknown", |
| 147 | commit.commit_id, |
| 148 | note_changes, |
| 149 | )) |
| 150 | |
| 151 | if as_json: |
| 152 | out: list[dict[str, str | list[dict[str, str]]]] = [] |
| 153 | for short_id, date, msg, author, full_id, changes in events: |
| 154 | out.append({ |
| 155 | "commit_id": full_id, |
| 156 | "date": date, |
| 157 | "message": msg, |
| 158 | "author": author, |
| 159 | "changes": [{"op": op, "note": note} for op, note in changes], |
| 160 | }) |
| 161 | typer.echo(json.dumps({"track": track, "events": out}, indent=2)) |
| 162 | return |
| 163 | |
| 164 | typer.echo(f"\nNote history: {track}") |
| 165 | typer.echo(f"Commits analysed: {len(commits_with_manifest)}") |
| 166 | |
| 167 | if not events: |
| 168 | typer.echo("\n (no note-level changes found for this track)") |
| 169 | return |
| 170 | |
| 171 | for short_id, date, msg, author, _full_id, changes in events: |
| 172 | typer.echo(f"\n{short_id} {date} \"{msg}\" ({len(changes)} change(s))") |
| 173 | for op_kind, note_summary in changes: |
| 174 | prefix = " +" if op_kind == "+" else " -" |
| 175 | suffix = " (removed)" if op_kind == "-" else "" |
| 176 | typer.echo(f"{prefix} {note_summary}{suffix}") |