Allow for logging to Studio when not inside a repo (#646)

* post to studio even without git/dvc repo

* tests for no-git scenario

* studio: make no-repo paths relative to cwd

* make ruff happy

* don't require exp name

* don't require baseline rev

* refactor studio path formatting

* live: Set new defaults `report=None` and `save_dvc_exp=True`.

* frameworks: Drop model_file.

* update examples

* Write to root dvc.yaml (#687)

* add dvcyaml to root

* clean up dvcyaml implementation

* fix existing tests

* add new tests

* add unit tests for updating dvcyaml

* use posix paths

* don't resolve symlinks

* drop entire dvclive dir on cleanup

* fix studio tests

* revert cleanup changes

* unify rel_path util func

* cleanup test

* refactor tests

* add test for multiple dvclive instances

* put dvc_file logic into _init_dvc_file

---------

Co-authored-by: daavoo <daviddelaiglesiacastro@gmail.com>

* report: Drop "auto" logic.

Fallback to `None` when conditions are not met for other types.

* studio: Extract `post_to_studio` and decoulple from `make_report` (#705)

* refactor(tests): Split `test_main` into separate files.

Rename test_frameworks to frameworks.

* fix matplotlib warning

* fix studio tests

* fix windows studio paths

* fix windows studio paths for plots

* skip fabric tests if not installed

* drop dvc repo

* drop dvcignore

* drop unrelated test_fabric.py file

* fix windows paths

* fix windows paths

* adapt plot paths even if no dvc repo

* default baseline rev to all zeros

* consolidate repro tests

* set null sha as variable

* add type hints to studio

* limit windows path handling to studio

* fix typing errors in studio module

* fix mypy in live module

* drop checking for dvc_file

---------

Co-authored-by: daavoo <daviddelaiglesiacastro@gmail.com>

src/dvclive/dvc.py

@@ -5,6 +5,7 @@
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, List, Optional
 
+from dvclive import env
 from dvclive.plots import Image, Metric
 from dvclive.serialize import dump_yaml
 from dvclive.utils import StrPath, rel_path
@@ -131,9 +132,14 @@ def _update_entries(old, new, key):
 def get_exp_name(name, scm, baseline_rev) -> str:
     from dvc.exceptions import InvalidArgumentError
     from dvc.repo.experiments.refs import ExpRefInfo
-    from dvc.repo.experiments.utils import check_ref_format, get_random_exp_name
+    from dvc.repo.experiments.utils import (
+        check_ref_format,
+        gen_random_name,
+        get_random_exp_name,
+    )
 
-    if name:
+    name = name or os.getenv(env.DVC_EXP_NAME)
+    if name and scm and baseline_rev:
         ref = ExpRefInfo(baseline_sha=baseline_rev, name=name)
         if scm.get_ref(str(ref)):
             logger.warning(f"Experiment conflicts with existing experiment '{name}'.")
@@ -144,7 +150,11 @@ def get_exp_name(name, scm, baseline_rev) -> str:
                 logger.warning(e)
             else:
                 return name
-    return get_random_exp_name(scm, baseline_rev)
+    if scm and baseline_rev:
+        return get_random_exp_name(scm, baseline_rev)
+    if name:
+        return name
+    return gen_random_name()
 
 
 def find_overlapping_stage(dvc_repo: "Repo", path: StrPath) -> Optional["Stage"]:

src/dvclive/live.py

@@ -66,6 +66,8 @@
 
 ParamLike = Union[int, float, str, bool, List["ParamLike"], Dict[str, "ParamLike"]]
 
+NULL_SHA: str = "0" * 40
+
 
 class Live:
     def __init__(
@@ -136,8 +138,8 @@ def __init__(
         self._report_notebook = None
         self._init_report()
 
-        self._baseline_rev: Optional[str] = None
-        self._exp_name: Optional[str] = exp_name
+        self._baseline_rev: str = os.getenv(env.DVC_EXP_BASELINE_REV, NULL_SHA)
+        self._exp_name: Optional[str] = exp_name or os.getenv(env.DVC_EXP_NAME)
         self._exp_message: Optional[str] = exp_message
         self._experiment_rev: Optional[str] = None
         self._inside_dvc_exp: bool = False
@@ -156,7 +158,7 @@ def __init__(
         else:
             self._init_cleanup()
 
-        self._latest_studio_step = self.step if resume else -1
+        self._latest_studio_step: int = self.step if resume else -1
         self._studio_events_to_skip: Set[str] = set()
         self._dvc_studio_config: Dict[str, Any] = {}
         self._init_studio()
@@ -189,28 +191,36 @@ def _init_cleanup(self):
             os.remove(dvc_file)
 
     @catch_and_warn(DvcException, logger)
-    def _init_dvc(self):
+    def _init_dvc(self):  # noqa: C901
         from dvc.scm import NoSCM
 
         if os.getenv(env.DVC_ROOT, None):
             self._inside_dvc_pipeline = True
             self._init_dvc_pipeline()
         self._dvc_repo = get_dvc_repo()
 
+        scm = self._dvc_repo.scm if self._dvc_repo else None
+        if isinstance(scm, NoSCM):
+            scm = None
+        if scm:
+            self._baseline_rev = scm.get_rev()
+        self._exp_name = get_exp_name(self._exp_name, scm, self._baseline_rev)
+        logger.info(f"Logging to experiment '{self._exp_name}'")
+
         dvc_logger = logging.getLogger("dvc")
         dvc_logger.setLevel(os.getenv(env.DVCLIVE_LOGLEVEL, "WARNING").upper())
 
         self._dvc_file = self._init_dvc_file()
 
-        if (self._dvc_repo is None) or isinstance(self._dvc_repo.scm, NoSCM):
+        if not scm:
             if self._save_dvc_exp:
                 logger.warning(
                     "Can't save experiment without a Git Repo."
                     "\nCreate a Git repo (`git init`) and commit (`git commit`)."
                 )
                 self._save_dvc_exp = False
             return
-        if self._dvc_repo.scm.no_commits:
+        if scm.no_commits:
             if self._save_dvc_exp:
                 logger.warning(
                     "Can't save experiment to an empty Git Repo."
@@ -230,12 +240,7 @@ def _init_dvc(self):
         if self._inside_dvc_pipeline:
             return
 
-        self._baseline_rev = self._dvc_repo.scm.get_rev()
         if self._save_dvc_exp:
-            self._exp_name = get_exp_name(
-                self._exp_name, self._dvc_repo.scm, self._baseline_rev
-            )
-            logger.info(f"Logging to experiment '{self._exp_name}'")
             mark_dvclive_only_started(self._exp_name)
             self._include_untracked.append(self.dir)
 
@@ -249,8 +254,6 @@ def _init_dvc_file(self) -> str:
     def _init_dvc_pipeline(self):
         if os.getenv(env.DVC_EXP_BASELINE_REV, None):
             # `dvc exp` execution
-            self._baseline_rev = os.getenv(env.DVC_EXP_BASELINE_REV, "")
-            self._exp_name = os.getenv(env.DVC_EXP_NAME, "")
             self._inside_dvc_exp = True
             if self._save_dvc_exp:
                 logger.info("Ignoring `save_dvc_exp` because `dvc exp run` is running")
@@ -275,22 +278,6 @@ def _init_studio(self):
             logger.debug("Skipping `studio` report `start` and `done` events.")
             self._studio_events_to_skip.add("start")
             self._studio_events_to_skip.add("done")
-        elif self._dvc_repo is None:
-            logger.warning(
-                "Can't connect to Studio without a DVC Repo."
-                "\nYou can create a DVC Repo by calling `dvc init`."
-            )
-            self._studio_events_to_skip.add("start")
-            self._studio_events_to_skip.add("data")
-            self._studio_events_to_skip.add("done")
-        elif not self._save_dvc_exp:
-            logger.warning(
-                "Can't connect to Studio without creating a DVC experiment."
-                "\nIf you have a DVC Pipeline, run it with `dvc exp run`."
-            )
-            self._studio_events_to_skip.add("start")
-            self._studio_events_to_skip.add("data")
-            self._studio_events_to_skip.add("done")
         else:
             self.post_to_studio("start")
 
@@ -840,7 +827,7 @@ def make_dvcyaml(self):
         make_dvcyaml(self)
 
     @catch_and_warn(DvcException, logger)
-    def post_to_studio(self, event: str):
+    def post_to_studio(self, event: Literal["start", "data", "done"]):
         post_to_studio(self, event)
 
     def end(self):

src/dvclive/studio.py

@@ -1,23 +1,28 @@
 # ruff: noqa: SLF001
+from __future__ import annotations
 import base64
 import logging
 import math
 import os
+from pathlib import PureWindowsPath
+from typing import TYPE_CHECKING, Literal, Mapping
 
 from dvc_studio_client.config import get_studio_config
 from dvc_studio_client.post_live_metrics import post_live_metrics
 
+if TYPE_CHECKING:
+    from dvclive.live import Live
 from dvclive.serialize import load_yaml
-from dvclive.utils import parse_metrics, rel_path
+from dvclive.utils import parse_metrics, rel_path, StrPath
 
 logger = logging.getLogger("dvclive")
 
 
-def _get_unsent_datapoints(plot, latest_step):
+def _get_unsent_datapoints(plot: Mapping, latest_step: int):
     return [x for x in plot if int(x["step"]) > latest_step]
 
 
-def _cast_to_numbers(datapoints):
+def _cast_to_numbers(datapoints: Mapping):
     for datapoint in datapoints:
         for k, v in datapoint.items():
             if k == "step":
@@ -33,31 +38,33 @@ def _cast_to_numbers(datapoints):
     return datapoints
 
 
-def _adapt_path(live, name):
+def _adapt_path(live: Live, name: StrPath):
     if live._dvc_repo is not None:
         name = rel_path(name, live._dvc_repo.root_dir)
+    if os.name == "nt":
+        name = str(PureWindowsPath(name).as_posix())
     return name
 
 
-def _adapt_plot_datapoints(live, plot):
+def _adapt_plot_datapoints(live: Live, plot: Mapping):
     datapoints = _get_unsent_datapoints(plot, live._latest_studio_step)
     return _cast_to_numbers(datapoints)
 
 
-def _adapt_image(image_path):
+def _adapt_image(image_path: StrPath):
     with open(image_path, "rb") as fobj:
         return base64.b64encode(fobj.read()).decode("utf-8")
 
 
-def _adapt_images(live):
+def _adapt_images(live: Live):
     return {
         _adapt_path(live, image.output_path): {"image": _adapt_image(image.output_path)}
         for image in live._images.values()
         if image.step > live._latest_studio_step
     }
 
 
-def get_studio_updates(live):
+def get_studio_updates(live: Live):
     if os.path.isfile(live.params_file):
         params_file = live.params_file
         params_file = _adapt_path(live, params_file)
@@ -82,14 +89,14 @@ def get_studio_updates(live):
     return metrics, params, plots
 
 
-def get_dvc_studio_config(live):
+def get_dvc_studio_config(live: Live):
     config = {}
     if live._dvc_repo:
         config = live._dvc_repo.config.get("studio")
     return get_studio_config(dvc_studio_config=config)
 
 
-def post_to_studio(live, event):
+def post_to_studio(live: Live, event: Literal["start", "data", "done"]):
     if event in live._studio_events_to_skip:
         return
 
@@ -98,7 +105,7 @@ def post_to_studio(live, event):
         kwargs["message"] = live._exp_message
     elif event == "data":
         metrics, params, plots = get_studio_updates(live)
-        kwargs["step"] = live.step
+        kwargs["step"] = live.step  # type: ignore
         kwargs["metrics"] = metrics
         kwargs["params"] = params
         kwargs["plots"] = plots
@@ -108,10 +115,10 @@ def post_to_studio(live, event):
     response = post_live_metrics(
         event,
         live._baseline_rev,
-        live._exp_name,
+        live._exp_name,  # type: ignore
         "dvclive",
         dvc_studio_config=live._dvc_studio_config,
-        **kwargs,
+        **kwargs,  # type: ignore
     )
     if not response:
         logger.warning(f"`post_to_studio` `{event}` failed.")

tests/test_dvc.py

@@ -29,27 +29,24 @@ def test_get_dvc_repo_subdir(tmp_dir):
 def test_exp_save_on_end(tmp_dir, save, mocked_dvc_repo):
     live = Live(save_dvc_exp=save)
     live.end()
+    assert live._baseline_rev is not None
+    assert live._exp_name is not None
     if save:
-        assert live._baseline_rev is not None
-        assert live._exp_name is not None
         mocked_dvc_repo.experiments.save.assert_called_with(
             name=live._exp_name,
             include_untracked=[live.dir, "dvc.yaml"],
             force=True,
             message=None,
         )
     else:
-        assert live._baseline_rev is not None
-        assert live._exp_name is None
         mocked_dvc_repo.experiments.save.assert_not_called()
 
 
-def test_exp_save_skip_on_env_vars(tmp_dir, monkeypatch, mocker):
+def test_exp_save_skip_on_env_vars(tmp_dir, monkeypatch):
     monkeypatch.setenv(DVC_EXP_BASELINE_REV, "foo")
     monkeypatch.setenv(DVC_EXP_NAME, "bar")
     monkeypatch.setenv(DVC_ROOT, tmp_dir)
 
-    mocker.patch("dvclive.live.get_dvc_repo", return_value=None)
     live = Live()
     live.end()
 
@@ -60,31 +57,6 @@ def test_exp_save_skip_on_env_vars(tmp_dir, monkeypatch, mocker):
     assert live._inside_dvc_pipeline
 
 
-def test_exp_save_run_on_dvc_repro(tmp_dir, mocker):
-    dvc_repo = mocker.MagicMock()
-    dvc_stage = mocker.MagicMock()
-    dvc_file = mocker.MagicMock()
-    dvc_repo.index.stages = [dvc_stage, dvc_file]
-    dvc_repo.scm.get_rev.return_value = "current_rev"
-    dvc_repo.scm.get_ref.return_value = None
-    dvc_repo.scm.no_commits = False
-    dvc_repo.config = {}
-    dvc_repo.root_dir = tmp_dir
-    mocker.patch("dvclive.live.get_dvc_repo", return_value=dvc_repo)
-    live = Live()
-    assert live._save_dvc_exp
-    assert live._baseline_rev is not None
-    assert live._exp_name is not None
-    live.end()
-
-    dvc_repo.experiments.save.assert_called_with(
-        name=live._exp_name,
-        include_untracked=[live.dir, "dvc.yaml"],
-        force=True,
-        message=None,
-    )
-
-
 def test_exp_save_with_dvc_files(tmp_dir, mocker):
     dvc_repo = mocker.MagicMock()
     dvc_file = mocker.MagicMock()
@@ -166,7 +138,7 @@ def test_errors_on_git_add_are_catched(tmp_dir, mocked_dvc_repo, monkeypatch):
     mocked_dvc_repo.scm.untracked_files.return_value = ["dvclive/metrics.json"]
     mocked_dvc_repo.scm.add.side_effect = DvcException("foo")
 
-    with Live(dvcyaml=False) as live:
+    with Live() as live:
         live.summary["foo"] = 1
 
 
@@ -204,10 +176,12 @@ def test_no_scm_repo(tmp_dir, mocker):
     assert live._save_dvc_exp is False
 
 
-def test_dvc_repro(tmp_dir, monkeypatch, mocker):
+def test_dvc_repro(tmp_dir, monkeypatch, mocked_dvc_repo, mocked_studio_post):
     monkeypatch.setenv(DVC_ROOT, "root")
-    mocker.patch("dvclive.live.get_dvc_repo", return_value=None)
     live = Live(save_dvc_exp=True)
+    assert live._baseline_rev is not None
+    assert live._exp_name is not None
+    assert not live._studio_events_to_skip
     assert not live._save_dvc_exp