Add support for gpu-rent.vars and enhance git update functionality

- Updated .gitignore to include gpu-rent.vars.
- Modified env.example to introduce the UPDATE_GIT variable for controlling git updates during execution.
- Implemented Import-GpuRentVars function in gpu-rent.ps1 to load environment variables from gpu-rent.vars.
- Enhanced gpu-rent.sh to support loading variables from gpu-rent.vars and added logic for handling default and extra arguments.
- Updated CLI documentation to reflect the new gpu-rent.vars file and its usage in configuration.
- Improved bootstrap and provisioning logic to conditionally perform git updates based on the new configuration.

tests/test_civitai_fetch.py

@@ -0,0 +1,35 @@
+from pathlib import Path
+
+from gpu_rent.remote.civitai_fetch import should_skip
+
+
+def test_should_skip_missing(tmp_path: Path):
+    skip, _ = should_skip(tmp_path / "nope.safetensors", "abc")
+    assert skip is False
+
+
+def test_should_skip_exists_no_sha(tmp_path: Path):
+    dest = tmp_path / "a.safetensors"
+    dest.write_bytes(b"weights")
+    skip, reason = should_skip(dest, "")
+    assert skip is True
+    assert "уже есть" in reason
+
+
+def test_should_skip_sha_match(tmp_path: Path):
+    dest = tmp_path / "a.safetensors"
+    dest.write_bytes(b"weights")
+    import hashlib
+
+    digest = hashlib.sha256(b"weights").hexdigest()
+    skip, reason = should_skip(dest, digest)
+    assert skip is True
+    assert "sha ok" in reason
+
+
+def test_should_not_skip_bad_sha(tmp_path: Path):
+    dest = tmp_path / "a.safetensors"
+    dest.write_bytes(b"weights")
+    skip, reason = should_skip(dest, "deadbeef" * 8)
+    assert skip is False
+    assert "перекачиваю" in reason

tests/test_clone_ext_update.py

@@ -0,0 +1,15 @@
+from gpu_rent.remote.clone_ext import do_update, is_sha
+
+
+def test_is_sha():
+    assert is_sha("a" * 40)
+    assert not is_sha("main")
+
+
+def test_do_update_reads_flag(tmp_path, monkeypatch):
+    flag = tmp_path / "gpu-rent-update-git"
+    monkeypatch.setattr("gpu_rent.remote.clone_ext.UPDATE_PATH", flag)
+    flag.write_text("0\n", encoding="utf-8")
+    assert do_update() is False
+    flag.write_text("1\n", encoding="utf-8")
+    assert do_update() is True

tests/test_sshtunnel_shim.py

@@ -0,0 +1,18 @@
+import paramiko
+
+from gpu_rent.tunnel import _patch_paramiko_for_sshtunnel, _ssh_tunnel_forwarder
+
+
+def test_dsskey_shim_allows_sshtunnel_import():
+    # Simulate paramiko>=4 (no DSSKey) then ensure sshtunnel can load.
+    had = getattr(paramiko, "DSSKey", None)
+    if had is not None:
+        delattr(paramiko, "DSSKey")
+    try:
+        _patch_paramiko_for_sshtunnel()
+        assert hasattr(paramiko, "DSSKey")
+        cls = _ssh_tunnel_forwarder()
+        assert cls is not None
+    finally:
+        if had is not None:
+            paramiko.DSSKey = had

tests/test_varsfile.py

@@ -0,0 +1,32 @@
+from pathlib import Path
+
+from gpu_rent.varsfile import apply_vars_file, parse_vars_file, split_args
+
+
+def test_parse_vars_file(tmp_path: Path):
+    path = tmp_path / "gpu-rent.vars"
+    path.write_text(
+        "# comment\n"
+        "GPU_RENT_DEFAULT_ARGS=up --yes\n"
+        "export UPDATE_GIT=false\n"
+        "QUOTED=\"a b\"\n",
+        encoding="utf-8",
+    )
+    data = parse_vars_file(path)
+    assert data["GPU_RENT_DEFAULT_ARGS"] == "up --yes"
+    assert data["UPDATE_GIT"] == "false"
+    assert data["QUOTED"] == "a b"
+
+
+def test_apply_does_not_override(tmp_path: Path, monkeypatch):
+    path = tmp_path / "gpu-rent.vars"
+    path.write_text("FOO=from-file\n", encoding="utf-8")
+    monkeypatch.setenv("FOO", "from-env")
+    apply_vars_file(path, override=False)
+    import os
+
+    assert os.environ["FOO"] == "from-env"
+
+
+def test_split_args():
+    assert split_args("up --yes --no-update") == ["up", "--yes", "--no-update"]