feat: docsgpt up runs and manages DocsGPT on Docker

`docsgpt up` copies the standalone Compose file shipped with this package
version into the stack directory (~/.docsgpt/server by default), writes its
.env and starts the stack on the images of the same version. A first run
asks who should reach DocsGPT (this computer, the network with a token, or a
domain with HTTPS) and which model provider to use; flags answer the same
questions for scripts. Re-running keeps secrets and settings and moves the
image tag, and the database password is only generated for a new database.

Also: down, status, logs, token, open, env, upgrade (uv tool installs
upgrade themselves and run `up` again) and uninstall (keeps settings and
data unless --purge). The commands import no Flask, Celery or settings.

The wheel carries deployment/docker-compose-standalone.yaml as
docsgpt/deploy/docker-compose.yaml; the sdist includes the source file.

docsgpt/deploy/__init__.py

@@ -0,0 +1,5 @@
+"""Run DocsGPT on Docker from the installed package: ``docsgpt up`` and the commands that manage it.
+
+Nothing here imports the Flask app, Celery or the settings module, so these
+commands start instantly and work before any configuration exists.
+"""

docsgpt/deploy/commands.py

@@ -0,0 +1,381 @@
+"""``docsgpt up`` and the commands that manage the stack it starts."""
+
+from __future__ import annotations
+
+import getpass
+import json
+import os
+import re
+import shutil
+import subprocess
+import sys
+import webbrowser
+from collections.abc import Callable, Mapping
+from dataclasses import dataclass
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any, Optional
+
+from docsgpt.deploy import envfile, stack
+from docsgpt.deploy.docker import DeployError, Docker, lan_ip, wait_healthy
+
+PROJECT = "docsgpt"
+DATABASE_VOLUME = f"{PROJECT}_postgres_data"
+_MOVING_TAGS = ("latest", "develop")
+_KEY = re.compile(r"^[A-Za-z_][A-Za-z0-9_]*$")
+
+EXPOSURE_CHOICES = [
+    ("local", "Only this computer"),
+    ("network", "Other machines on the network (plain HTTP, access token)"),
+    ("domain", "A domain name with HTTPS (Caddy certificate, access token)"),
+]
+
+
+class Prompter:
+    """Questions on the terminal. The installer hands its terminal to ``docsgpt up``."""
+
+    def choose(self, question: str, options: list[tuple[str, str]], default: str) -> str:
+        keys = [key for key, _ in options]
+        print(question)
+        for number, (key, label) in enumerate(options, 1):
+            print(f"  {number}) {label}{' (default)' if key == default else ''}")
+        while True:
+            answer = input(f"Choose 1-{len(options)} [{keys.index(default) + 1}]: ").strip()
+            if not answer:
+                return default
+            if answer.isdigit() and 1 <= int(answer) <= len(options):
+                return keys[int(answer) - 1]
+            if answer in keys:
+                return answer
+            print("Enter one of the numbers above.")
+
+    def text(self, question: str, default: Optional[str] = None, secret: bool = False) -> str:
+        ask = getpass.getpass if secret else input
+        while True:
+            answer = ask(f"{question}{f' [{default}]' if default else ''}: ").strip()
+            if answer:
+                return answer
+            if default:
+                return default
+
+    def confirm(self, question: str, default: bool = False) -> bool:
+        answer = input(f"{question} [{'Y/n' if default else 'y/N'}]: ").strip().lower()
+        return default if not answer else answer in ("y", "yes")
+
+
+def detect_installer() -> str:
+    """How this ``docsgpt`` was installed: ``uv`` (uv tool), ``pipx`` or ``pip``."""
+    prefix = Path(sys.prefix)
+    if (prefix / "uv-receipt.toml").is_file():
+        return "uv"
+    if "pipx" in prefix.parts:
+        return "pipx"
+    return "pip"
+
+
+def _run_command(args: list[str]) -> int:
+    try:
+        return subprocess.call(args)
+    except FileNotFoundError as exc:
+        raise DeployError(f"{args[0]} is not on PATH") from exc
+
+
+def _exec_command(argv: list[str]) -> int:
+    """Replace this process with ``argv`` (the upgraded ``docsgpt``); Windows runs it and waits."""
+    executable = shutil.which(argv[0]) or argv[0]
+    if sys.platform == "win32":
+        return subprocess.call([executable, *argv[1:]])
+    os.execv(executable, [executable, *argv[1:]])
+    return 0  # not reached
+
+
+@dataclass
+class Context:
+    """What the commands talk to; tests replace the parts that touch Docker, the terminal or the network."""
+
+    docker: Any
+    prompter: Any
+    interactive: bool
+    version: str
+    lan_ip: Callable[[], str] = lan_ip
+    wait: Callable[[str, float], bool] = wait_healthy
+    open_browser: Callable[[str], Any] = webbrowser.open
+    installer: Callable[[], str] = detect_installer
+    run: Callable[[list[str]], int] = _run_command
+    exec_up: Callable[[list[str]], int] = _exec_command
+
+    @classmethod
+    def default(cls, args) -> "Context":
+        from docsgpt.version import __version__
+
+        interactive = sys.stdin.isatty() and not getattr(args, "yes", False)
+        return cls(docker=Docker(), prompter=Prompter(), interactive=interactive, version=__version__)
+
+
+def _installed(directory: Path) -> Optional[dict[str, str]]:
+    """The stack's settings, or None (with a message) when there is no install in ``directory``."""
+    if not (directory / stack.COMPOSE_FILE).is_file():
+        print(f"No DocsGPT install in {directory}. Run `docsgpt up` first, or pass --dir.", file=sys.stderr)
+        return None
+    return envfile.read(directory / ".env")
+
+
+def _current_provider(env: Mapping[str, str]) -> str:
+    name = env.get("LLM_PROVIDER", "docsgpt")
+    if name == "openai" and env.get("OPENAI_BASE_URL"):
+        return "openai-compatible"
+    return name if name in stack.PROVIDERS else "docsgpt"
+
+
+def _check_other_stacks(args, context: Context, directory: Path) -> None:
+    others = {path for path in context.docker.project_dirs(PROJECT) if path.resolve() != directory.resolve()}
+    if not others or args.adopt:
+        return
+    where = ", ".join(sorted(str(path) for path in others))
+    question = (
+        f"Docker already runs a DocsGPT stack started from {where}; it uses the same data volumes. "
+        f"Manage it from {directory} instead?"
+    )
+    if context.interactive and context.prompter.confirm(question, default=False):
+        return
+    raise DeployError(
+        f"Docker already runs a DocsGPT stack started from {where}. Stop it with `docker compose down` "
+        f"in that folder, or run again with --adopt to manage it from {directory}."
+    )
+
+
+def _choose_provider(args, context: Context, existing: Mapping[str, str], ask: bool):
+    name = args.provider
+    if name is None and ask:
+        name = context.prompter.choose("Which model provider?", list(stack.PROVIDERS.items()), _current_provider(existing))
+    if name is None:
+        return None
+    api_key = args.api_key or os.environ.get("DOCSGPT_API_KEY")
+    model, base_url = args.model, args.base_url
+    if context.interactive:
+        if name == "openai-compatible":
+            base_url = base_url or context.prompter.text(
+                "Server base URL (Ollama on this machine: http://host.docker.internal:11434/v1)"
+            )
+            model = model or context.prompter.text("Model name")
+        elif name != "docsgpt" and not api_key:
+            api_key = context.prompter.text(f"{stack.PROVIDERS[name]} API key", secret=True)
+    try:
+        return stack.provider_settings(name, api_key=api_key, model=model, base_url=base_url)
+    except ValueError as exc:
+        raise DeployError(str(exc)) from exc
+
+
+def up(args, context: Optional[Context] = None) -> int:
+    """Install or update the stack in its directory and start it."""
+    context = context or Context.default(args)
+    directory = stack.stack_dir(args.dir)
+    env_path = directory / ".env"
+    record_path = directory / stack.RECORD_FILE
+    existing = envfile.read(env_path)
+    configured = record_path.is_file()
+
+    context.docker.preflight(context.interactive)
+    _check_other_stacks(args, context, directory)
+
+    ask = context.interactive and (not configured or args.reconfigure)
+    expose, domain = args.expose, args.domain
+    if ask and expose is None and domain is None:
+        expose = context.prompter.choose("Who should reach DocsGPT?", EXPOSURE_CHOICES, stack.exposure(existing))
+    if expose == "domain" and not domain:
+        if not context.interactive:
+            raise DeployError("--expose domain needs --domain")
+        domain = context.prompter.text("Domain name (its DNS must point at this machine)", existing.get("DOCSGPT_DOMAIN"))
+    provider = _choose_provider(args, context, existing, ask)
+
+    image_tag = args.image_tag or context.version
+    try:
+        updates = stack.plan(
+            existing,
+            image_tag=image_tag,
+            fresh_database=not context.docker.volume_exists(DATABASE_VOLUME),
+            expose=expose,
+            domain=domain,
+            port=args.port,
+            provider=provider,
+            docling=args.docling,
+        )
+    except ValueError as exc:
+        raise DeployError(str(exc)) from exc
+
+    directory.mkdir(parents=True, exist_ok=True)
+    shutil.copyfile(stack.compose_source(), directory / stack.COMPOSE_FILE)
+    envfile.update(env_path, updates)
+    env = envfile.read(env_path)
+
+    up_args = ["up", "-d", "--remove-orphans"]
+    if image_tag in _MOVING_TAGS:
+        up_args += ["--pull", "always"]
+    print(f"Starting DocsGPT {image_tag} from {directory} ...")
+    context.docker.compose(directory, *up_args)
+
+    health = stack.health_url(env)
+    print("Waiting for DocsGPT to answer (the first start also sets up the database) ...")
+    if not context.wait(health, args.timeout):
+        print(
+            f"DocsGPT did not answer at {health} within {args.timeout} seconds. "
+            "See what happened with `docsgpt logs backend`.",
+            file=sys.stderr,
+        )
+        return 1
+
+    now = datetime.now(timezone.utc).isoformat(timespec="seconds")
+    record = json.loads(record_path.read_text(encoding="utf-8")) if configured else {"installed_at": now}
+    record.update(version=context.version, image_tag=image_tag, updated_at=now)
+    record_path.write_text(json.dumps(record, indent=2) + "\n", encoding="utf-8")
+
+    address = stack.url(env, context.lan_ip())
+    mode = stack.exposure(env)
+    print(f"\nDocsGPT is running at {address}")
+    if env.get("AUTH_TYPE") == "simple_jwt" and env.get("JWT_SECRET_KEY"):
+        print("Access token (the page asks for it; `docsgpt token` prints it again):")
+        print(f"  {stack.simple_jwt_token(env['JWT_SECRET_KEY'])}")
+    if mode == "network":
+        print("Traffic is plain HTTP. Outside a trusted network, use a domain with HTTPS: docsgpt up --domain <name>")
+    elif mode == "domain":
+        print("Caddy gets the certificate when it starts: DNS must point at this machine and ports 80 and 443 be open.")
+    print(f"Settings: {env_path}  (change the model provider or access with `docsgpt up --reconfigure`)")
+    print("Manage it with: docsgpt status | logs | upgrade | down | uninstall")
+    if context.interactive and not configured and not args.no_open and mode == "local":
+        context.open_browser(address)
+    return 0
+
+
+def down(args, context: Optional[Context] = None) -> int:
+    """Stop the stack; data and settings stay."""
+    context = context or Context.default(args)
+    directory = stack.stack_dir(args.dir)
+    if _installed(directory) is None:
+        return 1
+    context.docker.compose(directory, "down")
+    return 0
+
+
+def status(args, context: Optional[Context] = None) -> int:
+    """Version, address, containers and whether the API answers (exit 1 when it does not)."""
+    context = context or Context.default(args)
+    directory = stack.stack_dir(args.dir)
+    env = _installed(directory)
+    if env is None:
+        return 1
+    tag = env.get("DOCSGPT_IMAGE_TAG", "unknown") + env.get("DOCSGPT_IMAGE_VARIANT", "")
+    print(f"DocsGPT {tag} in {directory}")
+    print(f"Address: {stack.url(env, context.lan_ip())} ({stack.exposure(env)})")
+    context.docker.compose(directory, "ps", check=False)
+    healthy = context.wait(stack.health_url(env), 0)
+    print("API: answering" if healthy else "API: not answering (see `docsgpt logs backend`)")
+    return 0 if healthy else 1
+
+
+def logs(args, context: Optional[Context] = None) -> int:
+    """``docker compose logs`` for the stack."""
+    context = context or Context.default(args)
+    directory = stack.stack_dir(args.dir)
+    if _installed(directory) is None:
+        return 1
+    options = (["--follow"] if args.follow else []) + (["--tail", str(args.tail)] if args.tail else [])
+    return context.docker.compose(directory, "logs", *options, *args.services, check=False).returncode
+
+
+def token(args, context: Optional[Context] = None) -> int:
+    """Print the access token of a ``simple_jwt`` install."""
+    directory = stack.stack_dir(args.dir)
+    env = _installed(directory)
+    if env is None:
+        return 1
+    if env.get("AUTH_TYPE") != "simple_jwt" or not env.get("JWT_SECRET_KEY"):
+        print(f"This install has no access token (AUTH_TYPE={env.get('AUTH_TYPE') or 'none'}).", file=sys.stderr)
+        return 1
+    print(stack.simple_jwt_token(env["JWT_SECRET_KEY"]))
+    return 0
+
+
+def open_ui(args, context: Optional[Context] = None) -> int:
+    """Open DocsGPT in the browser."""
+    context = context or Context.default(args)
+    directory = stack.stack_dir(args.dir)
+    env = _installed(directory)
+    if env is None:
+        return 1
+    address = stack.url(env, context.lan_ip())
+    print(address)
+    context.open_browser(address)
+    return 0
+
+
+def env(args, context: Optional[Context] = None) -> int:
+    """Show where the settings are, or get and set them."""
+    env_path = stack.stack_dir(args.dir) / ".env"
+    if args.env_action is None:
+        print(env_path)
+        return 0
+    if args.env_action == "get":
+        values = envfile.read(env_path)
+        if args.key not in values:
+            print(f"{args.key} is not set in {env_path}", file=sys.stderr)
+            return 1
+        print(values[args.key])
+        return 0
+    updates = {}
+    for pair in args.pairs:
+        key, separator, value = pair.partition("=")
+        if not separator or not _KEY.match(key):
+            raise DeployError(f"expected KEY=VALUE, got {pair!r}")
+        updates[key] = value
+    try:
+        envfile.update(env_path, updates)
+    except ValueError as exc:
+        raise DeployError(str(exc)) from exc
+    print(f"Saved to {env_path}. Run `docsgpt up` to apply.")
+    return 0
+
+
+def _uninstall_hint(installer: str) -> str:
+    return {"uv": "uv tool uninstall docsgpt", "pipx": "pipx uninstall docsgpt"}.get(installer, "pip uninstall docsgpt")
+
+
+def upgrade(args, context: Optional[Context] = None) -> int:
+    """Upgrade the package, then run the new version's ``docsgpt up``."""
+    context = context or Context.default(args)
+    spec = f"docsgpt=={args.version}" if args.version else "docsgpt"
+    installer = context.installer()
+    if installer == "uv":
+        if context.run(["uv", "tool", "install", "--force", spec]) != 0:
+            raise DeployError(f"uv could not install {spec}")
+        return context.exec_up(["docsgpt", "up", "--dir", str(stack.stack_dir(args.dir))])
+    command = f"pipx install --force {spec}" if installer == "pipx" else f"pip install -U {spec}"
+    print(f"Upgrade the package with `{command}`, then run `docsgpt up` to move the stack to it.", file=sys.stderr)
+    return 1
+
+
+def uninstall(args, context: Optional[Context] = None) -> int:
+    """Remove the containers and the stack files; ``--purge`` also deletes settings and data."""
+    context = context or Context.default(args)
+    directory = stack.stack_dir(args.dir)
+    if _installed(directory) is None:
+        return 1
+    if args.purge:
+        what = "containers, settings and data (documents, conversations, the database)"
+    else:
+        what = "containers (the settings in .env and the data volumes are kept)"
+    if not args.yes:
+        if not context.interactive:
+            raise DeployError("uninstall needs --yes when there is no terminal to confirm on")
+        if not context.prompter.confirm(f"Remove the DocsGPT {what} in {directory}?", default=False):
+            print("Nothing removed.")
+            return 1
+    context.docker.compose(directory, "down", "--remove-orphans", *(["-v"] if args.purge else []))
+    if args.purge:
+        shutil.rmtree(directory)
+        print(f"Removed DocsGPT and its data from {directory}.")
+    else:
+        for name in (stack.COMPOSE_FILE, stack.RECORD_FILE):
+            (directory / name).unlink(missing_ok=True)
+        print(f"Removed the containers. Settings stay in {directory / '.env'} and data in the Docker volumes.")
+    print(f"To remove the docsgpt command too: {_uninstall_hint(context.installer())}")
+    return 0

docsgpt/deploy/docker.py

@@ -0,0 +1,143 @@
+"""The docker CLI calls behind ``docsgpt up``."""
+
+from __future__ import annotations
+
+import http.client
+import re
+import shutil
+import socket
+import subprocess
+import sys
+import time
+import urllib.request
+from collections.abc import Callable, Sequence
+from pathlib import Path
+from typing import Optional
+
+MIN_COMPOSE = (2, 24, 0)
+DAEMON_START_SECONDS = 120
+
+
+class DeployError(Exception):
+    """A problem the user can act on; the command prints it without a traceback."""
+
+
+def run(args: Sequence[str], *, cwd: Optional[Path] = None, capture: bool = False, check: bool = True):
+    """Run a command, streaming its output unless ``capture``; with ``check`` a failure raises DeployError."""
+    try:
+        result = subprocess.run(list(args), cwd=cwd, text=True, capture_output=capture, check=False)
+    except FileNotFoundError as exc:
+        raise DeployError(f"{args[0]} is not installed or not on PATH") from exc
+    if check and result.returncode != 0:
+        detail = (result.stderr or "").strip() if capture else ""
+        message = f"`{' '.join(args)}` failed with exit code {result.returncode}"
+        raise DeployError(f"{message}: {detail}" if detail else message)
+    return result
+
+
+def _parse_version(text: str) -> Optional[tuple[int, ...]]:
+    match = re.search(r"(\d+)\.(\d+)\.(\d+)", text or "")
+    return tuple(int(part) for part in match.groups()) if match else None
+
+
+class Docker:
+    """Docker and Docker Compose, through their command-line tools."""
+
+    def __init__(
+        self,
+        runner: Callable[..., subprocess.CompletedProcess] = run,
+        which: Callable[[str], Optional[str]] = shutil.which,
+        sleep: Callable[[float], None] = time.sleep,
+        platform: str = sys.platform,
+    ) -> None:
+        self._run = runner
+        self._which = which
+        self._sleep = sleep
+        self._platform = platform
+
+    def preflight(self, interactive: bool = False) -> None:
+        """Make sure Docker is installed and running and Compose is new enough, starting Docker Desktop on macOS."""
+        if not self._which("docker"):
+            raise DeployError("Docker is not installed. Get it from https://docs.docker.com/get-docker/ and run this again.")
+        if not self.daemon_running():
+            self._start_daemon()
+        result = self._run(["docker", "compose", "version", "--short"], capture=True, check=False)
+        version = _parse_version(result.stdout) if result.returncode == 0 else None
+        if version is None:
+            raise DeployError(
+                "Docker Compose v2 is not available (`docker compose version` failed). "
+                "Install the Compose plugin: https://docs.docker.com/compose/install/"
+            )
+        if version < MIN_COMPOSE:
+            found = ".".join(str(part) for part in version)
+            raise DeployError(f"Docker Compose {found} is too old; DocsGPT needs 2.24 or newer.")
+
+    def daemon_running(self) -> bool:
+        return self._run(["docker", "info"], capture=True, check=False).returncode == 0
+
+    def _start_daemon(self) -> None:
+        if self._platform == "darwin":
+            print("Docker is not running; starting Docker Desktop ...", file=sys.stderr)
+            self._run(["open", "-a", "Docker"], check=False)
+            for _ in range(DAEMON_START_SECONDS // 2):
+                self._sleep(2)
+                if self.daemon_running():
+                    return
+            raise DeployError("Docker Desktop did not start within two minutes. Start it and run this again.")
+        if self._platform.startswith("linux"):
+            raise DeployError("Docker is not running. Start it with `sudo systemctl start docker` and run this again.")
+        raise DeployError("Docker is not running. Start Docker Desktop and run this again.")
+
+    def compose(self, directory: Path, *args: str, capture: bool = False, check: bool = True):
+        """``docker compose <args>`` in ``directory``, which holds the Compose file and its ``.env``."""
+        return self._run(["docker", "compose", *args], cwd=directory, capture=capture, check=check)
+
+    def volume_exists(self, name: str) -> bool:
+        return self._run(["docker", "volume", "inspect", name], capture=True, check=False).returncode == 0
+
+    def project_dirs(self, project: str) -> set[Path]:
+        """The folders containers of Compose project ``project`` were started from."""
+        result = self._run(
+            [
+                "docker", "ps", "-a",
+                "--filter", f"label=com.docker.compose.project={project}",
+                "--format", '{{.Label "com.docker.compose.project.working_dir"}}',
+            ],
+            capture=True,
+            check=False,
+        )
+        if result.returncode != 0:
+            return set()
+        return {Path(line.strip()) for line in result.stdout.splitlines() if line.strip()}
+
+
+def wait_healthy(
+    url: str,
+    timeout: float,
+    *,
+    opener: Callable = urllib.request.urlopen,
+    sleep: Callable[[float], None] = time.sleep,
+    clock: Callable[[], float] = time.monotonic,
+) -> bool:
+    """Poll ``url`` until it answers 2xx (True) or ``timeout`` seconds pass (False); tries at least once."""
+    deadline = clock() + timeout
+    while True:
+        try:
+            with opener(url, timeout=5) as response:
+                if 200 <= response.status < 300:
+                    return True
+        except (OSError, http.client.HTTPException):
+            pass
+        if clock() >= deadline:
+            return False
+        sleep(2)
+
+
+def lan_ip() -> str:
+    """This machine's address on its network, or ``localhost``. No packet is sent."""
+    with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as probe:
+        try:
+            probe.connect(("192.0.2.1", 80))
+            return probe.getsockname()[0]
+        except OSError:
+            return "localhost"

docsgpt/deploy/envfile.py

@@ -0,0 +1,74 @@
+"""Read and update a ``.env`` file in place, keeping the lines the user wrote."""
+
+from __future__ import annotations
+
+import os
+import re
+from collections.abc import Mapping
+from pathlib import Path
+from typing import Optional
+
+_ASSIGNMENT = re.compile(r"^\s*(?:export\s+)?([A-Za-z_][A-Za-z0-9_]*)\s*=(.*)$")
+# Values written without quotes: nothing Compose would interpolate, strip or treat as a comment.
+_PLAIN = re.compile(r"^[A-Za-z0-9_./:@+,=-]*$")
+
+
+def _parse_value(raw: str) -> str:
+    """The value of one assignment, with Compose's quoting rules."""
+    value = raw.strip()
+    if len(value) >= 2 and value[0] == value[-1] == "'":
+        return value[1:-1]
+    if len(value) >= 2 and value[0] == value[-1] == '"':
+        return re.sub(r'\\(["\\])', r"\1", value[1:-1])
+    return value.split(" #", 1)[0].rstrip()
+
+
+def _format_value(value: str) -> str:
+    """``value`` quoted so it reads back unchanged."""
+    if "\n" in value or "\r" in value:
+        raise ValueError("a .env value cannot contain a newline")
+    if _PLAIN.match(value):
+        return value
+    if "'" not in value:
+        return f"'{value}'"
+    return '"' + value.replace("\\", "\\\\").replace('"', '\\"') + '"'
+
+
+def read(path: Path) -> dict[str, str]:
+    """The assignments in ``path`` (empty when it does not exist); a repeated key keeps its last value."""
+    path = Path(path)
+    if not path.is_file():
+        return {}
+    values: dict[str, str] = {}
+    for line in path.read_text(encoding="utf-8").splitlines():
+        match = _ASSIGNMENT.match(line)
+        if match:
+            values[match.group(1)] = _parse_value(match.group(2))
+    return values
+
+
+def update(path: Path, values: Mapping[str, Optional[str]]) -> None:
+    """Set each key in place (``None`` removes it), append new keys, and leave every other line alone.
+
+    A new file is created readable by its owner only: it holds secrets.
+    """
+    formatted = {key: None if value is None else _format_value(value) for key, value in values.items()}
+    path = Path(path)
+    lines = path.read_text(encoding="utf-8").splitlines() if path.is_file() else []
+    written: set[str] = set()
+    out: list[str] = []
+    for line in lines:
+        match = _ASSIGNMENT.match(line)
+        key = match.group(1) if match else None
+        if key not in formatted:
+            out.append(line)
+            continue
+        if key not in written and formatted[key] is not None:
+            out.append(f"{key}={formatted[key]}")
+        written.add(key)
+    out.extend(f"{key}={value}" for key, value in formatted.items() if key not in written and value is not None)
+
+    path.parent.mkdir(parents=True, exist_ok=True)
+    descriptor = os.open(path, os.O_WRONLY | os.O_CREAT | os.O_TRUNC, 0o600)
+    with os.fdopen(descriptor, "w", encoding="utf-8") as handle:
+        handle.write("\n".join(out) + "\n" if out else "")

docsgpt/deploy/stack.py

@@ -0,0 +1,184 @@
+"""The stack ``docsgpt up`` runs: where it lives and what its ``.env`` holds."""
+
+from __future__ import annotations
+
+import os
+import secrets
+from collections.abc import Callable, Mapping
+from pathlib import Path
+from typing import Optional
+
+from docsgpt.core import paths
+
+COMPOSE_FILE = "docker-compose.yaml"
+RECORD_FILE = "install.json"
+DEFAULT_PORT = 7091
+EXPOSURES = ("local", "network", "domain")
+
+PROVIDERS = {
+    "docsgpt": "DocsGPT public API (free, no key)",
+    "openai": "OpenAI",
+    "anthropic": "Anthropic",
+    "google": "Google Gemini",
+    "openrouter": "OpenRouter",
+    "groq": "Groq",
+    "openai-compatible": "OpenAI-compatible server (Ollama, vLLM, LM Studio, ...)",
+}
+
+_LOCAL_BINDS = ("", "127.0.0.1", "localhost", "::1")
+_ALL_INTERFACES = ("0.0.0.0", "::")
+
+
+def compose_source() -> Path:
+    """The Compose file for this version: shipped in the wheel, or ``deployment/`` in a checkout."""
+    packaged = paths.package_dir() / "deploy" / COMPOSE_FILE
+    if packaged.is_file():
+        return packaged
+    root = paths.checkout_root()
+    if root is not None:
+        in_checkout = root / "deployment" / "docker-compose-standalone.yaml"
+        if in_checkout.is_file():
+            return in_checkout
+    raise FileNotFoundError("the Compose file is missing from this docsgpt installation; reinstall the package")
+
+
+def stack_dir(explicit: Optional[str]) -> Path:
+    """Where the stack lives: ``--dir``, else ``DOCSGPT_HOME``, else the default home (never a checkout)."""
+    if explicit:
+        return Path(explicit).expanduser().resolve()
+    configured = os.environ.get(paths.HOME_ENV)
+    if configured:
+        return Path(configured).expanduser().resolve()
+    return paths.default_home()
+
+
+def _profiles(env: Mapping[str, str]) -> set[str]:
+    return {name.strip() for name in env.get("COMPOSE_PROFILES", "").split(",") if name.strip()}
+
+
+def exposure(env: Mapping[str, str]) -> str:
+    """Who can reach the stack, read back from its ``.env``: local, network or domain."""
+    if "https" in _profiles(env) and env.get("DOCSGPT_DOMAIN"):
+        return "domain"
+    if env.get("DOCSGPT_BIND", "") not in _LOCAL_BINDS:
+        return "network"
+    return "local"
+
+
+def provider_settings(
+    name: str,
+    api_key: Optional[str] = None,
+    model: Optional[str] = None,
+    base_url: Optional[str] = None,
+) -> dict[str, Optional[str]]:
+    """The model settings for a provider choice; keys another provider used are cleared."""
+    if name not in PROVIDERS:
+        raise ValueError(f"unknown provider {name!r}; choose one of: {', '.join(PROVIDERS)}")
+    if name == "docsgpt":
+        return {"LLM_PROVIDER": "docsgpt", "API_KEY": None, "LLM_NAME": None, "OPENAI_BASE_URL": None}
+    if name == "openai-compatible":
+        if not base_url:
+            raise ValueError("an OpenAI-compatible server needs a base URL, e.g. http://host.docker.internal:11434/v1")
+        if not model:
+            raise ValueError("an OpenAI-compatible server needs a model name")
+        return {
+            "LLM_PROVIDER": "openai",
+            "API_KEY": api_key or "not-needed",
+            "LLM_NAME": model,
+            "OPENAI_BASE_URL": base_url,
+        }
+    if not api_key:
+        raise ValueError(f"{PROVIDERS[name]} needs an API key")
+    # Without LLM_NAME the model catalog picks the provider's first model.
+    return {"LLM_PROVIDER": name, "API_KEY": api_key, "LLM_NAME": model or None, "OPENAI_BASE_URL": None}
+
+
+def plan(
+    existing: Mapping[str, str],
+    *,
+    image_tag: str,
+    fresh_database: bool,
+    expose: Optional[str] = None,
+    domain: Optional[str] = None,
+    port: Optional[int] = None,
+    provider: Optional[Mapping[str, Optional[str]]] = None,
+    docling: Optional[bool] = None,
+    secret: Optional[Callable[[], str]] = None,
+) -> dict[str, Optional[str]]:
+    """The ``.env`` changes for an ``up``: only keys that change, ``None`` for a key to remove.
+
+    Settings the user did not ask to change are left alone, secrets are generated
+    once, and the database password is only set for a database that does not exist
+    yet (Postgres reads it when the volume is created).
+    """
+    secret = secret or (lambda: secrets.token_hex(32))
+    wanted: dict[str, Optional[str]] = {"DOCSGPT_IMAGE_TAG": image_tag}
+
+    if domain and expose is None:
+        expose = "domain"
+    if expose is None and "DOCSGPT_BIND" not in existing and "COMPOSE_PROFILES" not in existing:
+        expose = "local"
+    if expose == "local":
+        wanted.update(DOCSGPT_BIND="127.0.0.1", COMPOSE_PROFILES=None, DOCSGPT_DOMAIN=None)
+    elif expose == "network":
+        wanted.update(DOCSGPT_BIND="0.0.0.0", COMPOSE_PROFILES=None, DOCSGPT_DOMAIN=None)
+    elif expose == "domain":
+        if not domain:
+            raise ValueError("exposing DocsGPT on a domain needs the domain name")
+        wanted.update(DOCSGPT_BIND="127.0.0.1", COMPOSE_PROFILES="https", DOCSGPT_DOMAIN=domain)
+    elif expose is not None:
+        raise ValueError(f"unknown exposure {expose!r}; choose one of: {', '.join(EXPOSURES)}")
+    if expose in ("network", "domain") and not existing.get("AUTH_TYPE"):
+        wanted["AUTH_TYPE"] = "simple_jwt"
+
+    for key in ("INTERNAL_KEY", "JWT_SECRET_KEY"):
+        if not existing.get(key):
+            wanted[key] = secret()
+    if not existing.get("POSTGRES_PASSWORD") and fresh_database:
+        wanted["POSTGRES_PASSWORD"] = secret()
+    if "VITE_API_STREAMING" not in existing:
+        wanted["VITE_API_STREAMING"] = "true"
+    if port is not None:
+        wanted["DOCSGPT_PORT"] = str(port)
+    if docling is not None:
+        wanted["DOCSGPT_IMAGE_VARIANT"] = "-docling" if docling else None
+    if provider is None and "LLM_PROVIDER" not in existing:
+        provider = provider_settings("docsgpt")
+    if provider:
+        wanted.update(provider)
+
+    return {
+        key: value
+        for key, value in wanted.items()
+        if (value is None and key in existing) or (value is not None and existing.get(key) != value)
+    }
+
+
+def _port(env: Mapping[str, str]) -> str:
+    return env.get("DOCSGPT_PORT") or str(DEFAULT_PORT)
+
+
+def url(env: Mapping[str, str], lan_ip: str) -> str:
+    """The address to open DocsGPT at."""
+    mode = exposure(env)
+    if mode == "domain":
+        return f"https://{env['DOCSGPT_DOMAIN']}"
+    if mode == "network":
+        bind = env.get("DOCSGPT_BIND", "")
+        host = lan_ip if bind in _ALL_INTERFACES else bind
+        return f"http://{host}:{_port(env)}"
+    return f"http://localhost:{_port(env)}"
+
+
+def health_url(env: Mapping[str, str]) -> str:
+    """The API health check, reached from this machine whatever the exposure."""
+    bind = env.get("DOCSGPT_BIND", "")
+    host = "127.0.0.1" if bind in _LOCAL_BINDS or bind in _ALL_INTERFACES else bind
+    return f"http://{host}:{_port(env)}/api/health"
+
+
+def simple_jwt_token(secret_key: str) -> str:
+    """The token the API accepts under ``AUTH_TYPE=simple_jwt`` (it signs the same payload at start)."""
+    from jose import jwt
+
+    return jwt.encode({"sub": "local"}, secret_key, algorithm="HS256")