chore: import upstream snapshot with attribution

integrations/llm_cli/gemini_cli.py

@@ -0,0 +1,291 @@
+"""Google Gemini CLI adapter (``gemini -p``, non-interactive headless mode).
+
+Env vars
+--------
+GEMINI_CLI_BIN   Optional explicit path to the ``gemini`` binary.
+GEMINI_CLI_MODEL Optional model override passed as ``--model``.
+GEMINI_CLI_TIMEOUT_SECONDS Optional invocation timeout override for long prompts.
+
+Auth
+----
+Gemini CLI supports multiple auth modes (cached login sessions, ``GEMINI_API_KEY``,
+Vertex env credentials). Probe classification uses a short headless call and
+maps outcomes to ``logged_in``: True / False / None.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import subprocess
+
+from integrations.llm_cli.base import CLIInvocation, CLIProbe
+from integrations.llm_cli.binary_resolver import (
+    candidate_binary_names as _candidate_binary_names,
+)
+from integrations.llm_cli.binary_resolver import (
+    default_cli_fallback_paths as _default_cli_fallback_paths,
+)
+from integrations.llm_cli.binary_resolver import (
+    resolve_cli_binary,
+)
+from integrations.llm_cli.constants import (
+    DEFAULT_EXEC_TIMEOUT_SEC as _DEFAULT_EXEC_TIMEOUT_SEC,
+)
+from integrations.llm_cli.constants import (
+    MAX_EXEC_TIMEOUT_SEC as _MAX_EXEC_TIMEOUT_SEC,
+)
+from integrations.llm_cli.constants import (
+    MIN_EXEC_TIMEOUT_SEC as _MIN_EXEC_TIMEOUT_SEC,
+)
+from integrations.llm_cli.probe_utils import run_version_probe
+from integrations.llm_cli.semver_utils import parse_semver_three_part
+from integrations.llm_cli.subprocess_env import build_cli_subprocess_env
+from integrations.llm_cli.timeout_utils import resolve_timeout_from_env
+
+_PROBE_TIMEOUT_SEC = 20.0
+_AUTH_HINT = "Run: gemini (interactive login) or set GEMINI_API_KEY."
+# Source: https://developers.googleblog.com/an-important-update-transitioning-gemini-cli-to-antigravity-cli/
+_SUNSET_NOTE = (
+    " Note: Gemini CLI stops serving Pro/Ultra and free users on 2026-06-18; "
+    "paid Gemini Code Assist remains supported. Consider antigravity-cli (agy)."
+)
+
+
+def _resolve_exec_timeout_seconds() -> float:
+    return resolve_timeout_from_env(
+        env_key="GEMINI_CLI_TIMEOUT_SECONDS",
+        default=_DEFAULT_EXEC_TIMEOUT_SEC,
+        minimum=_MIN_EXEC_TIMEOUT_SEC,
+        maximum=_MAX_EXEC_TIMEOUT_SEC,
+    )
+
+
+def _gemini_auth_env_overrides() -> dict[str, str]:
+    """Build Gemini subprocess auth/config overrides used by probe and invoke."""
+    env: dict[str, str] = {"NO_COLOR": "1"}
+    keys = (
+        "GEMINI_API_KEY",
+        "GOOGLE_API_KEY",
+        "GOOGLE_GENAI_USE_VERTEXAI",
+        "GOOGLE_APPLICATION_CREDENTIALS",
+        "GOOGLE_CLOUD_PROJECT",
+        "GOOGLE_CLOUD_LOCATION",
+    )
+    for key in keys:
+        val = os.environ.get(key, "").strip()
+        if val:
+            env[key] = val
+    return env
+
+
+def _has_explicit_gemini_auth_env() -> str | None:
+    env = _gemini_auth_env_overrides()
+    for key in ("GEMINI_API_KEY", "GOOGLE_API_KEY", "GOOGLE_APPLICATION_CREDENTIALS"):
+        if env.get(key):
+            return key
+    if env.get("GOOGLE_GENAI_USE_VERTEXAI") and env.get("GOOGLE_CLOUD_PROJECT"):
+        return "GOOGLE_GENAI_USE_VERTEXAI"
+    return None
+
+
+def _classify_gemini_auth(returncode: int, stdout: str, stderr: str) -> tuple[bool | None, str]:
+    raw = (stdout or "").strip()
+    if raw.startswith("{"):
+        try:
+            payload = json.loads(raw)
+        except json.JSONDecodeError:
+            payload = None
+        if isinstance(payload, dict):
+            err = payload.get("error")
+            if isinstance(err, dict):
+                message = str(err.get("message", "")).strip()
+                code = err.get("code")
+                msg_lower = message.lower()
+                if (
+                    "please set an auth method" in msg_lower
+                    or "gemini_api_key" in msg_lower
+                    or "not authenticated" in msg_lower
+                    or "login required" in msg_lower
+                    or code == 41
+                ):
+                    return False, f"Not authenticated. {_AUTH_HINT}"
+    text = (stdout + "\n" + stderr).lower()
+    if "not authenticated" in text or ("authentication" in text and "required" in text):
+        return False, f"Not authenticated. {_AUTH_HINT}"
+    if "login required" in text or "please login" in text:
+        return False, f"Not authenticated. {_AUTH_HINT}"
+    if "please set an auth method" in text:
+        return False, f"Not authenticated. {_AUTH_HINT}"
+    if "invalid api key" in text or ("api key" in text and "missing" in text):
+        return False, "Gemini API key missing or invalid. Set GEMINI_API_KEY or login via `gemini`."
+    if returncode == 0:
+        return True, "Authenticated via Gemini CLI."
+    if "network" in text or "timeout" in text or "unreachable" in text or "connection" in text:
+        return None, "Network error while checking auth; will retry at invocation."
+    tail = (stderr or stdout).strip()[:200]
+    if tail:
+        return None, f"Auth status unclear (exit {returncode}): {tail}"
+    return None, f"Auth status unclear (exit {returncode})."
+
+
+def _fallback_gemini_cli_paths() -> list[str]:
+    return _default_cli_fallback_paths("gemini")
+
+
+class GeminiCLIAdapter:
+    """Non-interactive Gemini CLI (``gemini -p`` headless mode)."""
+
+    name = "gemini-cli"
+    binary_env_key = "GEMINI_CLI_BIN"
+    install_hint = "npm i -g @google/gemini-cli"
+    auth_hint = _AUTH_HINT.removesuffix(".")
+    min_version: str | None = None
+    default_exec_timeout_sec = _DEFAULT_EXEC_TIMEOUT_SEC
+
+    def _resolve_binary(self) -> str | None:
+        return resolve_cli_binary(
+            explicit_env_key="GEMINI_CLI_BIN",
+            binary_names=_candidate_binary_names("gemini"),
+            fallback_paths=_fallback_gemini_cli_paths,
+        )
+
+    def _probe_binary(self, binary_path: str) -> CLIProbe:
+        version_output, version_error = run_version_probe(
+            binary_path,
+            timeout_sec=_PROBE_TIMEOUT_SEC,
+        )
+        if version_error:
+            return CLIProbe(
+                installed=False,
+                version=None,
+                logged_in=None,
+                bin_path=None,
+                detail=version_error,
+            )
+
+        version = parse_semver_three_part(version_output or "")
+        probe_env = build_cli_subprocess_env(_gemini_auth_env_overrides())
+        try:
+            auth_proc = subprocess.run(
+                [binary_path, "-p", "respond with: ok", "--output-format", "json"],
+                capture_output=True,
+                text=True,
+                encoding="utf-8",
+                errors="replace",
+                timeout=_PROBE_TIMEOUT_SEC,
+                check=False,
+                env=probe_env,
+            )
+        except subprocess.TimeoutExpired:
+            logged_in = None
+            auth_detail = (
+                f"Gemini auth probe timed out after {_PROBE_TIMEOUT_SEC:.0f}s; auth status unknown."
+            )
+        except OSError as exc:
+            logged_in = None
+            auth_detail = f"Could not spawn gemini for auth probe: {exc}"
+        else:
+            logged_in, auth_detail = _classify_gemini_auth(
+                auth_proc.returncode, auth_proc.stdout, auth_proc.stderr
+            )
+
+        auth_env_source = _has_explicit_gemini_auth_env()
+        if logged_in is not True and auth_env_source:
+            logged_in = True
+            auth_detail = f"Authenticated via {auth_env_source} fallback."
+
+        # Gate the sunset notice on ``logged_in is not False`` so a user mid
+        # auth-failure isn't shown the migration ad next to the actual error
+        # they need to read. Authenticated (True) and ambiguous (None) probes
+        # still surface it — those are the cohorts whose CLI is operational
+        # today and who need to plan for 2026-06-18.
+        detail = auth_detail + _SUNSET_NOTE if logged_in is not False else auth_detail
+
+        return CLIProbe(
+            installed=True,
+            version=version,
+            logged_in=logged_in,
+            bin_path=binary_path,
+            detail=detail,
+        )
+
+    def detect(self) -> CLIProbe:
+        binary = self._resolve_binary()
+        if not binary:
+            return CLIProbe(
+                installed=False,
+                version=None,
+                logged_in=None,
+                bin_path=None,
+                detail=(
+                    "Gemini CLI not found on PATH or known install locations. "
+                    f"Install with: {self.install_hint} or set GEMINI_CLI_BIN."
+                ),
+            )
+        return self._probe_binary(binary)
+
+    def build(
+        self,
+        *,
+        prompt: str,
+        model: str | None,
+        workspace: str,
+        reasoning_effort: str | None = None,
+    ) -> CLIInvocation:
+        _ = reasoning_effort
+        binary = self._resolve_binary()
+        if not binary:
+            raise RuntimeError(
+                f"Gemini CLI not found. {self.install_hint} "
+                "or set GEMINI_CLI_BIN to the full binary path."
+            )
+
+        argv: list[str] = [binary, "-p", prompt, "--output-format", "json"]
+        resolved_model = (model or "").strip()
+        if resolved_model:
+            argv.extend(["--model", resolved_model])
+
+        ws = (workspace or "").strip()
+        cwd = ws or os.getcwd()
+        env = _gemini_auth_env_overrides()
+
+        return CLIInvocation(
+            argv=tuple(argv),
+            stdin=None,
+            cwd=cwd,
+            env=env,
+            timeout_sec=_resolve_exec_timeout_seconds(),
+        )
+
+    def parse(self, *, stdout: str, stderr: str, returncode: int) -> str:
+        text = (stdout or "").strip()
+        if not text:
+            raise RuntimeError(
+                self.explain_failure(stdout=stdout, stderr=stderr, returncode=returncode)
+                + " (empty output)"
+            )
+        try:
+            payload = json.loads(text)
+        except json.JSONDecodeError:
+            return text
+        if isinstance(payload, dict):
+            response = payload.get("response")
+            if isinstance(response, str):
+                return response.strip()
+            err = payload.get("error")
+            if isinstance(err, dict):
+                message = err.get("message")
+                if isinstance(message, str) and message.strip():
+                    raise RuntimeError(f"Gemini CLI returned an error: {message.strip()}")
+        return text
+
+    def explain_failure(self, *, stdout: str, stderr: str, returncode: int) -> str:
+        from integrations.llm_cli.failure_explain import explain_cli_failure
+
+        return explain_cli_failure(
+            exit_label="gemini -p",
+            stdout=stdout,
+            stderr=stderr,
+            returncode=returncode,
+        )