From adf411873c553a587495149b645a49f2bfb4e131 Mon Sep 17 00:00:00 2001
From: Gustaf Rydholm <gustaf.rydholm@gmail.com>
Date: Sun, 26 Jun 2022 00:02:03 +0200
Subject: Add artifacts script

---
 training/artifacts.py | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 training/artifacts.py

diff --git a/training/artifacts.py b/training/artifacts.py
new file mode 100644
index 0000000..9f970f8
--- /dev/null
+++ b/training/artifacts.py
@@ -0,0 +1,115 @@
+"""Fetches model artifacts from wandb."""
+from datetime import datetime
+from pathlib import Path
+import shutil
+import sys
+from typing import Optional, Union
+
+import click
+from loguru import logger as log
+import wandb
+from wandb.apis.public import Run
+
+TRAINING_DIR = Path(__file__).parents[0].resolve()
+ARTIFACTS_DIR = TRAINING_DIR.parent / "text_recognizer" / "artifacts"
+RUNS_DIR = TRAINING_DIR / "logs" / "runs"
+
+
+def _get_run_dir(run: Run) -> Optional[Path]:
+    created_at = datetime.fromisoformat(run.created_at).astimezone()
+    date = created_at.date()
+    hour = (created_at + created_at.utcoffset()).hour
+    runs = list((RUNS_DIR / f"{date}").glob(f"{hour}-*"))
+    if not runs:
+        return None
+    return runs[0]
+
+
+def _get_best_weights(run_dir: Path) -> Optional[Path]:
+    checkpoints = list(run_dir.glob("**/epoch=*.ckpt"))
+    if not checkpoints:
+        return None
+    return checkpoints[0]
+
+
+def _copy_config(run_dir: Path, dst_dir: Path) -> None:
+    log.info(f"Copying config to artifact folders ({dst_dir})")
+    shutil.copyfile(src=run_dir / "config.yaml", dst=dst_dir / "config.yaml")
+
+
+def _copy_checkpoint(checkpoint: Path, dst_dir: Path) -> None:
+    """Copy model checkpoint from local directory."""
+    log.info(f"Copying best run ({checkpoint}) to artifact folders ({dst_dir})")
+    shutil.copyfile(src=checkpoint, dst=dst_dir / "model.pt")
+
+
+def save_model(run: Run, tag: str) -> None:
+    """Save model to artifacts."""
+    dst_dir = ARTIFACTS_DIR / f"{tag}_text_recognizer"
+    dst_dir.mkdir(parents=True, exist_ok=True)
+    run_dir = _get_run_dir(run)
+    if not run_dir:
+        log.error("Could not find experiment locally!")
+    best_weights = _get_best_weights(run_dir)
+    if not best_weights:
+        log.error("Could not find checkpoint locally!")
+    _copy_config(run_dir, dst_dir)
+    _copy_checkpoint(best_weights, dst_dir)
+    log.info("Successfully moved model and config to artifacts directory")
+    # TODO: be able to download from w&b
+
+
+def find_best_model(entity: str, project: str, tag: str, metric: str, mode: str) -> Run:
+    """Find the best model on wandb."""
+    if mode == "min":
+        default_metric_value = sys.maxsize
+        sort_reverse = False
+    else:
+        default_metric_value = 0
+        sort_reverse = True
+    api = wandb.Api()
+    runs = api.runs(f"{entity}/{project}", filters={"tags": {"$in": [tag]}})
+    runs = sorted(
+        runs,
+        key=lambda run: run.summary.get(metric, default_metric_value),
+        reverse=sort_reverse,
+    )
+    best_run = runs[0]
+    summary = best_run.summary
+    log.info(
+        f"Best run is ({best_run.name}, {best_run.id}) picked from {len(runs)} runs with the following metric"
+    )
+    log.info(
+        f"{metric}: {summary[metric]}"
+        # , {metric.replace('val', 'test')}: {summary[metric.replace('val', 'test')]}"
+    )
+    return best_run
+
+
+@click.command()
+@click.option("--entity", type=str, default="aktersnurra", help="Name of the author")
+@click.option(
+    "--project", type=str, default="text-recognizer", help="The wandb project name"
+)
+@click.option(
+    "--tag",
+    type=click.Choice(["paragraphs", "lines"]),
+    default="paragraphs",
+    help="Tag to filter by",
+)
+@click.option(
+    "--metric", type=str, default="val_loss", help="Which metric to filter on"
+)
+@click.option(
+    "--mode",
+    type=click.Choice(["min", "max"]),
+    default="min",
+    help="Min or max value of metric",
+)
+def main(entity: str, project: str, tag: str, metric: str, mode: str) -> None:
+    best_run = find_best_model(entity, project, tag, metric, mode)
+    save_model(best_run, tag)
+
+
+if __name__ == "__main__":
+    main()
-- 
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