feat: can specify several users to configure

Signed-off-by: d9pouces <github@19pouces.net>

.pre-commit-config.yaml

@@ -77,7 +77,7 @@ repos:
   rev: 1.8.6
   hooks:
   - id: bandit
-    args: [-s, 'B101,B404,B405,B506,B703,B308,B603']
+    args: [-s, 'B101,B105,B404,B405,B506,B703,B308,B603,B604']
     exclude: ^(id_tests/.*|npm/node_modules/.*|tools/.*|doc/.*|interdiode/static/vendor/.*)
 - repo: https://github.com/shellcheck-py/shellcheck-py
   rev: v0.11.0.1

id_configurator/cli.py

@@ -83,6 +83,26 @@ DstOption = Annotated[
         help="Destination directory receiving the modified files.",
     ),
 ]
+UserOption = Annotated[
+    list[str],
+    typer.Option(
+        "--user",
+        help="A user to prepare per-user configuration for (may be repeated).",
+    ),
+]
+AutoUsersOption = Annotated[
+    bool,
+    typer.Option(
+        "--auto-users",
+        help=(
+            "Also prepare per-user configuration for every regular "
+            "(non-system) user found in <src>/etc/passwd: one with a login "
+            "shell (not nologin, sync or false) and a UID at or above "
+            "UID_MIN (from <src>/etc/login.defs, 1000 by default) - root is "
+            "always included regardless of its UID."
+        ),
+    ),
+]
 VerboseOption = Annotated[
     bool, typer.Option("--verbose", "-v", help="Enable verbose (debug) logging.")
 ]
@@ -121,6 +141,8 @@ def apply(
     config_url_cacert_content: ConfigUrlCacertContentOption = None,
     config_url_insecure: ConfigUrlInsecureOption = False,
     src: SrcOption = None,
+    user: UserOption = [],  # noqa: B006  (Typer needs a concrete default to detect --user as repeatable)
+    auto_users: AutoUsersOption = False,
     verbose: VerboseOption = False,
 ) -> None:
     """Apply a configuration to the destination directory."""
@@ -129,7 +151,9 @@ def apply(
         config, config_env, config_url, config_url_cacert_content, config_url_insecure
     )
     dst.mkdir(parents=True, exist_ok=True)
-    context = Context(config=configuration, dst=dst, src=src)
+    context = Context(
+        config=configuration, dst=dst, src=src, users=user, auto_users=auto_users
+    )
     for module_cls in all_modules():
         module = module_cls()
         if module.is_relevant(context):

id_configurator/config.py

@@ -239,11 +239,16 @@ class NpmConfig(BaseModel):
 
 
 class RustRepository(BaseModel):
-    """A cargo registry (see the "source" tables in .cargo/config.toml),
+    """A cargo registry (see the "source" tables in .cargo/config.toml).
-    served over the sparse HTTP protocol."""
+
+    `is_sparse`, if true, marks the registry as served over the sparse
+    HTTP protocol (its index is then declared as `sparse+<url>`) rather
+    than a git-based index.
+    """
 
     name: str
     url: str
+    is_sparse: bool = False
 
 
 class RustConfig(BaseModel):

id_configurator/context.py

@@ -7,18 +7,71 @@ filesystem used to detect the existing configuration.
 
 from __future__ import annotations
 
+from collections.abc import Sequence
 from pathlib import Path
 
 from id_configurator.config import Configuration
+from id_configurator.users import (
+    DEFAULT_UID_MIN,
+    PasswdEntry,
+    parse_login_defs_uid_min,
+    parse_passwd,
+)
 
 
 class Context:
     def __init__(
-        self, config: Configuration, dst: Path, src: Path | None = None
+        self,
+        config: Configuration,
+        dst: Path,
+        src: Path | None = None,
+        users: Sequence[str] | None = None,
+        auto_users: bool = False,
     ) -> None:
         self.config = config
         self.dst = dst.resolve()
         self.src = src.resolve() if src is not None else None
+        self._passwd_entries = self._load_passwd_entries()
+        self._uid_min = self._load_uid_min()
+        self.users = self._resolve_users(users or [], auto_users)
+
+    def _load_passwd_entries(self) -> dict[str, PasswdEntry]:
+        content = self.read_src_file("etc/passwd")
+        if content is None:
+            return {}
+        return {entry.name: entry for entry in parse_passwd(content.decode("utf-8"))}
+
+    def _load_uid_min(self) -> int:
+        content = self.read_src_file("etc/login.defs")
+        if content is None:
+            return DEFAULT_UID_MIN
+        uid_min = parse_login_defs_uid_min(content.decode("utf-8"))
+        return DEFAULT_UID_MIN if uid_min is None else uid_min
+
+    def _resolve_users(self, users: Sequence[str], auto_users: bool) -> list[str]:
+        resolved: list[str] = []
+        for user in users:
+            if user not in resolved:
+                resolved.append(user)
+        if auto_users:
+            for name, entry in self._passwd_entries.items():
+                if name not in resolved and entry.is_regular_user(self._uid_min):
+                    resolved.append(name)
+        return resolved
+
+    def home_dir(self, user: str) -> str:
+        """Relative path (no leading `/`) to `user`'s home directory, as used
+        by modules that write per-user configuration files.
+
+        Taken from `<src>`'s `/etc/passwd` entry for `user` when there is
+        one (the case for a user resolved via `--auto-users`); otherwise
+        falls back to the usual `/home/<user>` convention (`/root` for
+        root).
+        """
+        entry = self._passwd_entries.get(user)
+        if entry is not None and entry.home:
+            return entry.home.lstrip("/")
+        return "root" if user == "root" else f"home/{user}"
 
     def dst_path(self, relative: str) -> Path:
         """Resolve a path relative to the destination directory, refusing to escape it."""

id_configurator/modules/go.py

@@ -9,14 +9,15 @@ Go's own HTTPS client already trusts whatever the `certificates` module
 installs into the system CA store, so no separate certificate configuration
 is needed here, unlike npm's.
 
-Written to `$GOROOT/go.env` - not the per-user `go env -w` file (found at
+Written to `$GOROOT/go.env`, which `$GOROOT` defaults to `/usr/local/go` for
-`os.UserConfigDir()/go/env`, e.g. `$HOME/.config/go/env`), which is a
+essentially every standard Go install (the official Docker image included);
-separate, higher-precedence level in Go's own terminology. `$GOROOT`
+unlike a config dropped in one specific user's home, this applies regardless
-defaults to `/usr/local/go` for essentially every standard Go install (the
+of which user invokes `go`. The go command reads `$GOROOT/go.env` as a
-official Docker image included); unlike a config dropped in one specific
+fallback whenever a setting is not already present in a higher-precedence
-user's home, this applies regardless of which user invokes `go`. The go
+level - in particular the per-user `go env -w` file (found at
-command reads `$GOROOT/go.env` as a fallback whenever a setting is not
+`os.UserConfigDir()/go/env`, e.g. `$HOME/.config/go/env`), which this module
-already present in the user's own go/env file.
+also writes for each configured `--user` (`context.users`), so that one
+takes precedence should that user ever run `go env -w` themselves.
 """
 
 from __future__ import annotations
@@ -35,7 +36,11 @@ _GO_ENV = "usr/local/go/go.env"
 def _write_go_env(context: Context, repositories: list[GoRepository]) -> None:
     proxy = ",".join(repository.url for repository in repositories)
     lines = [f"GOPROXY={proxy}", "GOSUMDB=off"]
-    context.write_file(_GO_ENV, ("\n".join(lines) + "\n").encode("utf-8"))
+    content = ("\n".join(lines) + "\n").encode("utf-8")
+    context.write_file(_GO_ENV, content)
+    for user in context.users:
+        context.write_file(f"{context.home_dir(user)}/.config/go/env", content)
+        logger.info("configured go for user %s", user)
     logger.info("configured go to use %d module prox(y/ies)", len(repositories))
 
 

id_configurator/modules/nuget.py

@@ -19,12 +19,17 @@ when not overridden - the same tradeoff the `php` module's Composer config
 already accepts. A `<clear />` element is included so the configured
 sources fully replace nuget.org rather than being merged alongside it,
 matching every other package-manager module's behaviour.
+
+The same file is additionally written under each configured `--user`'s own
+home directory (`context.users`), since a non-root user invoking `dotnet`
+reads its config from there instead.
 """
 
 from __future__ import annotations
 
 import logging
 import xml.etree.ElementTree as ET
+from urllib.parse import urlparse
 
 from id_configurator.config import NuGetRepository
 from id_configurator.context import Context
@@ -48,10 +53,17 @@ def _write_nuget_config(context: Context, repositories: list[NuGetRepository]) -
     package_sources = ET.SubElement(configuration, "packageSources")
     ET.SubElement(package_sources, "clear")
     for repository in repositories:
-        ET.SubElement(
+        attributes = {"key": repository.name, "value": repository.url}
-            package_sources, "add", {"key": repository.name, "value": repository.url}
+        if urlparse(repository.url).scheme.lower() != "https":
+            attributes["allowInsecureConnections"] = "true"
+        ET.SubElement(package_sources, "add", attributes)
+    content = _render_xml(configuration)
+    context.write_file(_NUGET_CONFIG, content)
+    for user in context.users:
+        context.write_file(
+            f"{context.home_dir(user)}/.nuget/NuGet/NuGet.Config", content
         )
-    context.write_file(_NUGET_CONFIG, _render_xml(configuration))
+        logger.info("configured nuget for user %s", user)
     logger.info("configured nuget to use %d package source(s)", len(repositories))
 
 

id_configurator/modules/php.py

@@ -3,12 +3,20 @@
 
 Composer has no "replace the default registry" switch either: Packagist
 stays enabled unless a repository is explicitly declared under the name
-"packagist.org" and disabled. This just makes the configured repositories
+"packagist.org" and disabled. If any configured repository's URL isn't
+HTTPS, Composer refuses to use it unless `secure-http` is turned off in
+`config`; since that effectively means this is a private, non-internet
+setup, Packagist - unreachable in such a setup anyway - is disabled at the
+same time, exactly as if a `{"packagist.org": false}` repository entry had
+been declared. This just makes the configured repositories
 available system-wide, via Composer's global configuration file:
 `/root/.composer/config.json` (`COMPOSER_HOME/config.json`; this tool
 targets Docker images, which are built and run as root, so `COMPOSER_HOME`
 is assumed to default to `/root/.composer`, exactly like a fresh Composer
-install does when not overridden).
+install does when not overridden). The same file is additionally written
+under each configured `--user`'s own home directory (`context.users`),
+since a non-root user invoking `composer` reads its config from there
+instead.
 
 Composer's own HTTPS client (PHP's stream wrapper, generally backed by
 curl) already trusts whatever the `certificates` module installs into the
@@ -31,6 +39,7 @@ from __future__ import annotations
 
 import json
 import logging
+from urllib.parse import urlparse
 
 from id_configurator.config import PhpRepository
 from id_configurator.context import Context
@@ -43,16 +52,27 @@ _CA_BUNDLE = "/etc/ssl/certs/ca-certificates.crt"
 _OPENSSL_INI = "usr/local/etc/php/conf.d/id-configurator-openssl.ini"
 
 
+def _is_https(url: str) -> bool:
+    return urlparse(url).scheme.lower() == "https"
+
+
 def _write_composer_config(context: Context, repositories: list[PhpRepository]) -> None:
-    content = {
+    composer_repositories: list[dict[str, str | bool]] = [
-        "repositories": [
         {"name": repository.name, "type": "composer", "url": repository.url}
         for repository in repositories
     ]
-    }
+    content: dict[str, object] = {"repositories": composer_repositories}
-    context.write_file(
+    composer_repositories.append({"packagist.org": False})
-        _COMPOSER_CONFIG, (json.dumps(content, indent=4) + "\n").encode("utf-8")
+    if any(not _is_https(repository.url) for repository in repositories):
+        content["config"] = {"secure-http": False}
+        logger.info(
+            "disabled secure-http and packagist.org: non-HTTPS repository configured"
         )
+    rendered = (json.dumps(content, indent=4) + "\n").encode("utf-8")
+    context.write_file(_COMPOSER_CONFIG, rendered)
+    for user in context.users:
+        context.write_file(f"{context.home_dir(user)}/.composer/config.json", rendered)
+        logger.info("configured composer for user %s", user)
     logger.info(
         "configured composer to use %d additional repositories", len(repositories)
     )

id_configurator/modules/python.py

@@ -7,9 +7,11 @@ certificates installed by the certificates module.
 - poetry: `/root/.config/pypoetry/config.toml` (`repositories.*`/`certificates.*`).
   Poetry has no global "replace PyPI" switch: a project's `pyproject.toml`
   still has to reference these repositories as sources. This only makes the
-  repository and its certificate available system-wide. It also assumes the
+  repository and its certificate available system-wide. Since poetry only
-  container runs as root, since poetry only reads its config from the
+  reads its config from the current user's home directory, this assumes the
-  current user's home directory.
+  container runs as root; the same file is additionally written under each
+  configured `--user`'s own home directory (`context.users`), for the
+  benefit of a non-root user invoking poetry.
 - easy_install: `distutils.cfg` (`[easy_install] index_url`), written next
   to every Python installation detected under `<src>` (there is no location
   independent of a specific Python prefix).
@@ -73,9 +75,13 @@ def _write_poetry_config(
         lines.append(f"[certificates.{repository.name}]")
         lines.append(f"cert = {_toml_string(_CA_BUNDLE)}")
         lines.append("")
+    content = ("\n".join(lines).rstrip() + "\n").encode("utf-8")
+    context.write_file(_POETRY_CONFIG, content)
+    for user in context.users:
         context.write_file(
-        _POETRY_CONFIG, ("\n".join(lines).rstrip() + "\n").encode("utf-8")
+            f"{context.home_dir(user)}/.config/pypoetry/config.toml", content
         )
+        logger.info("configured poetry for user %s", user)
     logger.info("registered %d poetry repositories", len(repositories))
 
 

id_configurator/modules/rust.py

@@ -1,8 +1,10 @@
 """Configure cargo to use the configured RustRepository entries: the first
 one replaces crates.io entirely (via `[source.crates-io] replace-with`), and
 any further ones are registered as additional named registries (usable via
-`cargo add --registry <name>` or a dependency's `registry = "<name>"`), all
+`cargo add --registry <name>` or a dependency's `registry = "<name>"`). A
-using the sparse (plain HTTPS) protocol rather than a git-based index.
+repository's index is declared as `sparse+<url>` - the sparse (plain HTTPS)
+protocol - only when its `is_sparse` option is set; otherwise `<url>` is used
+as-is, for a git-based index.
 
 Cargo's own HTTPS client already trusts whatever the `certificates` module
 installs into the system CA store, so no separate certificate configuration
@@ -17,11 +19,17 @@ directory to `/`, consulting `/.cargo/config.toml` there, *before* falling
 back to `$CARGO_HOME/config.toml` - so this is the one genuinely global
 location: found regardless of which user, working directory or `CARGO_HOME`
 is in effect, unlike a config dropped in one specific user's home.
+
+For each configured `--user` (`context.users`), the same config is
+additionally written at that user's own `$HOME/.cargo/config.toml` - the
+conventional, un-overridden `CARGO_HOME` location for that specific user,
+which this module otherwise has no visibility into.
 """
 
 from __future__ import annotations
 
 import logging
+import re
 
 from id_configurator.config import RustRepository
 from id_configurator.context import Context
@@ -30,24 +38,48 @@ from id_configurator.modules.base import Module, register
 logger = logging.getLogger(__name__)
 
 _CARGO_CONFIG = ".cargo/config.toml"
+_REPOSITORY_NAME_FORBIDDEN_CHARS = re.compile(r"[^A-Za-z0-9_-]")
+
+
+def _sanitize_repository_name(name: str) -> str:
+    """Replace every character of `name` that isn't a plain identifier
+    character with `_`.
+
+    `name` is written verbatim both as a TOML table key (`[source.name]`,
+    `[registries.name]`) and inside a quoted string (`replace-with =
+    "name"`): an unrestricted name could break out of the table header or
+    string, or (via a literal `.`) silently create extra, nested tables
+    instead of naming the one table it is meant to.
+    """
+    return _REPOSITORY_NAME_FORBIDDEN_CHARS.sub("_", name)
+
+
+def _index_url(repository: RustRepository) -> str:
+    return f"sparse+{repository.url}" if repository.is_sparse else repository.url
 
 
 def _write_cargo_config(context: Context, repositories: list[RustRepository]) -> None:
     primary = repositories[0]
+    primary_name = _sanitize_repository_name(primary.name)
     lines = [
         "[source.crates-io]",
-        f'replace-with = "{primary.name}"',
+        f'replace-with = "{primary_name}"',
         "",
-        f"[source.{primary.name}]",
+        f"[source.{primary_name}]",
-        f'registry = "sparse+{primary.url}"',
+        f'registry = "{_index_url(primary)}"',
     ]
     for repository in repositories[1:]:
+        name = _sanitize_repository_name(repository.name)
         lines += [
             "",
-            f"[registries.{repository.name}]",
+            f"[registries.{name}]",
-            f'index = "sparse+{repository.url}"',
+            f'index = "{_index_url(repository)}"',
         ]
-    context.write_file(_CARGO_CONFIG, ("\n".join(lines) + "\n").encode("utf-8"))
+    content = ("\n".join(lines) + "\n").encode("utf-8")
+    context.write_file(_CARGO_CONFIG, content)
+    for user in context.users:
+        context.write_file(f"{context.home_dir(user)}/.cargo/config.toml", content)
+        logger.info("configured cargo for user %s", user)
     logger.info("configured cargo to use %s", primary.url)
 
 

id_configurator/modules/yum.py

@@ -32,6 +32,7 @@ from __future__ import annotations
 import configparser
 import fnmatch
 import logging
+import re
 import shutil
 import subprocess
 import tempfile
@@ -46,6 +47,19 @@ logger = logging.getLogger(__name__)
 
 _REPOS_DIR = "etc/yum.repos.d"
 _RPM_GPG_DIR = "etc/pki/rpm-gpg"
+_REPOSITORY_NAME_FORBIDDEN_CHARS = re.compile(r"[^A-Za-z0-9._-]")
+
+
+def _sanitize_repository_name(name: str) -> str:
+    """Replace every character of `name` that isn't a plain identifier
+    character with `_`.
+
+    `name` is written verbatim as the `.repo` file's INI section header
+    (`[name]`): an unrestricted name (containing `]`, a newline, ...) could
+    otherwise inject extra, attacker-controlled sections into the file
+    instead of just naming the one section it is meant to.
+    """
+    return _REPOSITORY_NAME_FORBIDDEN_CHARS.sub("_", name)
 
 
 def _disable_repo_content(content: str, patterns: Sequence[str]) -> str:
@@ -91,9 +105,10 @@ def _disable_existing_repos(context: Context, patterns: Sequence[str]) -> None:
 
 
 def _write_repo_file(context: Context, repository: YumRepository) -> None:
+    name = _sanitize_repository_name(repository.name)
     lines = [
-        f"[{repository.name}]",
+        f"[{name}]",
-        f"name={repository.name}",
+        f"name={name}",
         f"baseurl={repository.index_url}",
         "enabled=1",
     ]
@@ -103,10 +118,10 @@ def _write_repo_file(context: Context, repository: YumRepository) -> None:
     else:
         lines.append("gpgcheck=0")
     context.write_file(
-        f"{_REPOS_DIR}/{sanitize_filename(repository.name)}.repo",
+        f"{_REPOS_DIR}/{name}.repo",
         ("\n".join(lines) + "\n").encode("utf-8"),
     )
-    logger.info("added yum/dnf repository %s", repository.name)
+    logger.info("added yum/dnf repository %s", name)
 
 
 def _validate_gpg_key(name: str, content: bytes) -> None:

id_configurator/users.py

@@ -0,0 +1,78 @@
+"""Parse `/etc/passwd` entries for the `--auto-users` CLI option.
+
+A passwd(5) line is `name:passwd:uid:gid:gecos:home:shell`. `--auto-users`
+expands to every entry that looks like a regular (non-system) account - see
+`PasswdEntry.is_regular_user`.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+DEFAULT_UID_MIN = 1000
+
+_DISABLED_SHELL_NAMES = {"nologin", "sync", "false"}
+
+
+@dataclass(frozen=True)
+class PasswdEntry:
+    name: str
+    uid: int
+    home: str
+    shell: str
+
+    @property
+    def has_login_shell(self) -> bool:
+        return self.shell.rsplit("/", 1)[-1] not in _DISABLED_SHELL_NAMES
+
+    def is_regular_user(self, uid_min: int = DEFAULT_UID_MIN) -> bool:
+        """True unless `self` looks like a system account.
+
+        A login-disabling shell (`has_login_shell` False) only catches
+        service accounts that follow that convention; it misses others
+        (and could wrongly flag a merely locked human account). The
+        authoritative signal `useradd`/`adduser`/`systemd-sysusers` use
+        instead is the UID: system accounts get one below `uid_min` (the
+        `UID_MIN` from login.defs(5), 1000 by default). Both checks apply
+        together here - except for `root`, whose UID 0 is itself a system
+        convention rather than a sign it shouldn't be configured: it's
+        exempted from the UID check (though not from the shell one, so a
+        deliberately locked root account is still excluded).
+        """
+        if not self.has_login_shell:
+            return False
+        return self.name == "root" or self.uid >= uid_min
+
+
+def parse_passwd(content: str) -> list[PasswdEntry]:
+    entries = []
+    for line in content.splitlines():
+        if not line or line.startswith("#"):
+            continue
+        fields = line.split(":")
+        if len(fields) < 7:
+            continue
+        try:
+            uid = int(fields[2])
+        except ValueError:
+            continue
+        entries.append(
+            PasswdEntry(name=fields[0], uid=uid, home=fields[5], shell=fields[6])  # noqa: B604
+        )
+    return entries
+
+
+def parse_login_defs_uid_min(content: str) -> int | None:
+    """Extract `UID_MIN` from `/etc/login.defs` content (login.defs(5)), or
+    `None` if it isn't set there."""
+    for line in content.splitlines():
+        stripped = line.strip()
+        if not stripped or stripped.startswith("#"):
+            continue
+        parts = stripped.split()
+        if len(parts) >= 2 and parts[0] == "UID_MIN":
+            try:
+                return int(parts[1])
+            except ValueError:
+                return None
+    return None

pyproject.toml

@@ -44,7 +44,7 @@ maintainers = [
 name = "id-configurator"
 readme = "README.md"
 requires-python = ">=3.13"
-version = "2026.10.3"
+version = "2026.10.4"
 
 [project.scripts]
 id-configurator = "id_configurator:main"

tests/test_cli.py

@@ -15,6 +15,12 @@ CONFIG_WITH_CERT = {
     **MINIMAL_CONFIG,
     "configurations": {"certificates": [{"name": "my-ca", "content": "fake"}]},
 }
+CONFIG_WITH_GO_REPO = {
+    **MINIMAL_CONFIG,
+    "configurations": {
+        "go": {"repositories": [{"name": "demo", "url": "https://example.invalid/"}]}
+    },
+}
 
 
 def write_config(tmp_path, data) -> str:
@@ -129,6 +135,66 @@ def test_apply_runs_relevant_module(tmp_path) -> None:
     assert (dst / "etc/ssl/certs/ca-certificates.crt").read_bytes() == b"fake\n"
 
 
+def test_apply_with_user_option_writes_per_user_config(tmp_path) -> None:
+    config_path = write_config(tmp_path, CONFIG_WITH_GO_REPO)
+    dst = tmp_path / "dst"
+    result = runner.invoke(
+        cli.app,
+        [
+            "apply",
+            "--config",
+            config_path,
+            "--dst",
+            str(dst),
+            "--user",
+            "alice",
+            "--user",
+            "root",
+        ],
+    )
+
+    assert result.exit_code == 0
+    assert (dst / "home/alice/.config/go/env").read_text(encoding="utf-8") == (
+        "GOPROXY=https://example.invalid/\nGOSUMDB=off\n"
+    )
+    assert (dst / "root/.config/go/env").read_text(encoding="utf-8") == (
+        "GOPROXY=https://example.invalid/\nGOSUMDB=off\n"
+    )
+
+
+def test_apply_with_auto_users_reads_passwd_from_src(tmp_path) -> None:
+    config_path = write_config(tmp_path, CONFIG_WITH_GO_REPO)
+    src = tmp_path / "src"
+    (src / "etc").mkdir(parents=True)
+    (src / "etc/passwd").write_text(
+        "root:x:0:0:root:/root:/bin/bash\n"
+        "alice:x:1000:1000:Alice:/home/alice:/bin/bash\n"
+        "daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin\n",
+        encoding="utf-8",
+    )
+    dst = tmp_path / "dst"
+    result = runner.invoke(
+        cli.app,
+        [
+            "apply",
+            "--config",
+            config_path,
+            "--dst",
+            str(dst),
+            "--src",
+            str(src),
+            "--auto-users",
+        ],
+    )
+
+    assert result.exit_code == 0
+    # root is always included despite its uid 0; daemon (nologin shell) is
+    # a system account, excluded.
+    assert (dst / "root/.config/go/env").exists()
+    assert (dst / "home/alice/.config/go/env").exists()
+    assert not (dst / "usr/sbin/.config/go/env").exists()
+
+
 def test_main_default_name_calls_app(monkeypatch) -> None:
     mock_app = MagicMock()
     monkeypatch.setattr(cli, "app", mock_app)

tests/test_context.py

@@ -8,14 +8,16 @@ CONFIG = Configuration.model_validate(
 )
 
 
-def make_context(tmp_path, with_src: bool = True) -> Context:
+def make_context(
+    tmp_path, with_src: bool = True, users=None, auto_users: bool = False
+) -> Context:
     dst = tmp_path / "dst"
     dst.mkdir()
     src = None
     if with_src:
         src = tmp_path / "src"
         src.mkdir()
-    return Context(config=CONFIG, dst=dst, src=src)
+    return Context(config=CONFIG, dst=dst, src=src, users=users, auto_users=auto_users)
 
 
 def test_dst_path_within_destination(tmp_path) -> None:
@@ -97,3 +99,131 @@ def test_glob_src_matches_pattern(tmp_path) -> None:
     (context.src / "usr/lib/python-legacy").mkdir(parents=True)
     result = context.glob_src("usr/lib/python3.*")
     assert [entry.name for entry in result] == ["python3.11", "python3.12"]
+
+
+def test_users_defaults_to_empty_list(tmp_path) -> None:
+    context = make_context(tmp_path, with_src=False)
+    assert context.users == []
+
+
+def test_users_keeps_explicit_names_in_order_without_duplicates(tmp_path) -> None:
+    context = make_context(tmp_path, with_src=False, users=["alice", "bob", "alice"])
+    assert context.users == ["alice", "bob"]
+
+
+def test_auto_users_expands_from_passwd_excluding_disabled_shells(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    dst.mkdir()
+    src = tmp_path / "src"
+    (src / "etc").mkdir(parents=True)
+    (src / "etc/passwd").write_text(
+        "root:x:0:0:root:/root:/bin/bash\n"
+        "alice:x:1000:1000:Alice:/home/alice:/bin/bash\n"
+        "daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin\n",
+        encoding="utf-8",
+    )
+    context = Context(config=CONFIG, dst=dst, src=src, auto_users=True)
+    # root is always included despite its uid 0; daemon (nologin shell) is
+    # excluded as a system account.
+    assert context.users == ["root", "alice"]
+
+
+def test_auto_users_excludes_root_with_disabled_shell(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    dst.mkdir()
+    src = tmp_path / "src"
+    (src / "etc").mkdir(parents=True)
+    (src / "etc/passwd").write_text(
+        "root:x:0:0:root:/root:/usr/sbin/nologin\n"
+        "alice:x:1000:1000:Alice:/home/alice:/bin/bash\n",
+        encoding="utf-8",
+    )
+    context = Context(config=CONFIG, dst=dst, src=src, auto_users=True)
+    assert context.users == ["alice"]
+
+
+def test_auto_users_excludes_uid_below_default_uid_min(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    dst.mkdir()
+    src = tmp_path / "src"
+    (src / "etc").mkdir(parents=True)
+    (src / "etc/passwd").write_text(
+        "svc:x:999:999:service account:/home/svc:/bin/bash\n"
+        "alice:x:1000:1000:Alice:/home/alice:/bin/bash\n",
+        encoding="utf-8",
+    )
+    context = Context(config=CONFIG, dst=dst, src=src, auto_users=True)
+    assert context.users == ["alice"]
+
+
+def test_auto_users_honors_uid_min_from_login_defs(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    dst.mkdir()
+    src = tmp_path / "src"
+    (src / "etc").mkdir(parents=True)
+    (src / "etc/passwd").write_text(
+        "svc:x:999:999:service account:/home/svc:/bin/bash\n"
+        "alice:x:1000:1000:Alice:/home/alice:/bin/bash\n",
+        encoding="utf-8",
+    )
+    (src / "etc/login.defs").write_text("UID_MIN\t500\n", encoding="utf-8")
+    context = Context(config=CONFIG, dst=dst, src=src, auto_users=True)
+    assert context.users == ["svc", "alice"]
+
+
+def test_auto_users_combines_with_explicit_names_without_duplicates(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    dst.mkdir()
+    src = tmp_path / "src"
+    src.mkdir()
+    (src / "etc").mkdir()
+    (src / "etc/passwd").write_text(
+        "root:x:0:0:root:/root:/bin/bash\nalice:x:1000:1000:Alice:/home/alice:/bin/bash\n",
+        encoding="utf-8",
+    )
+    context = Context(
+        config=CONFIG, dst=dst, src=src, users=["bob", "alice"], auto_users=True
+    )
+    # explicit names come first, in order; auto-detected names are appended,
+    # skipping "alice" since it's already present.
+    assert context.users == ["bob", "alice", "root"]
+
+
+def test_auto_users_false_ignores_passwd(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    dst.mkdir()
+    src = tmp_path / "src"
+    (src / "etc").mkdir(parents=True)
+    (src / "etc/passwd").write_text(
+        "alice:x:1000:1000:Alice:/home/alice:/bin/bash\n", encoding="utf-8"
+    )
+    context = Context(config=CONFIG, dst=dst, src=src)
+    assert context.users == []
+
+
+def test_auto_users_without_src_is_empty(tmp_path) -> None:
+    context = make_context(tmp_path, with_src=False, auto_users=True)
+    assert context.users == []
+
+
+def test_home_dir_for_root(tmp_path) -> None:
+    context = make_context(tmp_path, with_src=False)
+    assert context.home_dir("root") == "root"
+
+
+def test_home_dir_falls_back_to_convention(tmp_path) -> None:
+    context = make_context(tmp_path, with_src=False)
+    assert context.home_dir("alice") == "home/alice"
+
+
+def test_home_dir_uses_passwd_entry_when_available(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    dst.mkdir()
+    src = tmp_path / "src"
+    src.mkdir()
+    (src / "etc").mkdir()
+    (src / "etc/passwd").write_text(
+        "alice:x:1000:1000:Alice:/srv/alice:/bin/bash\n", encoding="utf-8"
+    )
+    context = Context(config=CONFIG, dst=dst, src=src)
+    assert context.home_dir("alice") == "srv/alice"

tests/test_go.py

@@ -55,6 +55,18 @@ def test_apply_writes_goproxy(tmp_path) -> None:
     assert go_env == "GOPROXY=https://example.invalid/\nGOSUMDB=off\n"
 
 
+def test_apply_writes_go_env_for_each_configured_user(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    context = Context(
+        config=make_config(CONFIG_WITH_REPO), dst=dst, src=None, users=["alice"]
+    )
+
+    GoModule().apply(context)
+
+    go_env = (dst / "home/alice/.config/go/env").read_text(encoding="utf-8")
+    assert go_env == "GOPROXY=https://example.invalid/\nGOSUMDB=off\n"
+
+
 def test_apply_joins_multiple_repositories_with_comma(tmp_path) -> None:
     dst = tmp_path / "dst"
     context = Context(config=make_config(CONFIG_WITH_TWO_REPOS), dst=dst, src=None)

tests/test_nuget.py

@@ -63,6 +63,48 @@ def test_apply_writes_nuget_config(tmp_path) -> None:
     )
 
 
+def test_apply_marks_non_https_source_as_insecure(tmp_path) -> None:
+    data = {
+        "uuid": "12345678-1234-5678-1234-567812345678",
+        "organisation": "InterDiode",
+        "configurations": {
+            "nuget": {
+                "repositories": [{"name": "demo", "url": "http://example.invalid/"}]
+            }
+        },
+    }
+    dst = tmp_path / "dst"
+    context = Context(config=make_config(data), dst=dst, src=None)
+
+    NuGetModule().apply(context)
+
+    content = (dst / "root/.nuget/NuGet/NuGet.Config").read_text(encoding="utf-8")
+    assert content == (
+        '<?xml version="1.0" encoding="utf-8"?>\n'
+        "<configuration>\n"
+        "  <packageSources>\n"
+        "    <clear />\n"
+        '    <add key="demo" value="http://example.invalid/" allowInsecureConnections="true" />\n'
+        "  </packageSources>\n"
+        "</configuration>\n"
+    )
+
+
+def test_apply_writes_config_for_each_configured_user(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    context = Context(
+        config=make_config(CONFIG_WITH_REPO), dst=dst, src=None, users=["alice", "root"]
+    )
+
+    NuGetModule().apply(context)
+
+    root_content = (dst / "root/.nuget/NuGet/NuGet.Config").read_text(encoding="utf-8")
+    alice_content = (dst / "home/alice/.nuget/NuGet/NuGet.Config").read_text(
+        encoding="utf-8"
+    )
+    assert alice_content == root_content
+
+
 def test_apply_writes_multiple_sources_in_order(tmp_path) -> None:
     dst = tmp_path / "dst"
     context = Context(config=make_config(CONFIG_WITH_TWO_REPOS), dst=dst, src=None)

tests/test_php.py

@@ -80,7 +80,8 @@ def test_apply_writes_global_composer_config(tmp_path) -> None:
                 "name": "demo",
                 "type": "composer",
                 "url": "https://example.invalid/composer",
-            }
+            },
+            {"packagist.org": False},
         ]
     }
 
@@ -93,7 +94,70 @@ def test_apply_writes_multiple_repositories_in_order(tmp_path) -> None:
 
     config_path = dst / "root/.composer/config.json"
     content = json.loads(config_path.read_text(encoding="utf-8"))
-    assert [repo["name"] for repo in content["repositories"]] == ["demo", "other"]
+    names = [repo["name"] for repo in content["repositories"] if "name" in repo]
+    assert names == ["demo", "other"]
+    assert {"packagist.org": False} in content["repositories"]
+
+
+def test_apply_disables_secure_http_and_packagist_when_repo_not_https(
+    tmp_path,
+) -> None:
+    data = {
+        "uuid": "12345678-1234-5678-1234-567812345678",
+        "organisation": "InterDiode",
+        "configurations": {
+            "php": {
+                "repositories": [
+                    {"name": "demo", "url": "https://example.invalid/composer"},
+                    {"name": "insecure", "url": "http://other.invalid/composer"},
+                ]
+            }
+        },
+    }
+    dst = tmp_path / "dst"
+    context = Context(config=make_config(data), dst=dst, src=None)
+
+    PhpModule().apply(context)
+
+    config_path = dst / "root/.composer/config.json"
+    content = json.loads(config_path.read_text(encoding="utf-8"))
+    assert content["config"] == {"secure-http": False}
+    assert {"packagist.org": False} in content["repositories"]
+
+
+def test_apply_does_not_disable_secure_http_when_all_repos_https(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    context = Context(config=make_config(CONFIG_WITH_REPO), dst=dst, src=None)
+
+    PhpModule().apply(context)
+
+    config_path = dst / "root/.composer/config.json"
+    content = json.loads(config_path.read_text(encoding="utf-8"))
+    assert "config" not in content
+
+
+def test_apply_always_disables_packagist(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    context = Context(config=make_config(CONFIG_WITH_REPO), dst=dst, src=None)
+
+    PhpModule().apply(context)
+
+    config_path = dst / "root/.composer/config.json"
+    content = json.loads(config_path.read_text(encoding="utf-8"))
+    assert {"packagist.org": False} in content["repositories"]
+
+
+def test_apply_writes_composer_config_for_each_configured_user(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    context = Context(
+        config=make_config(CONFIG_WITH_REPO), dst=dst, src=None, users=["alice"]
+    )
+
+    PhpModule().apply(context)
+
+    root_content = (dst / "root/.composer/config.json").read_bytes()
+    alice_content = (dst / "home/alice/.composer/config.json").read_bytes()
+    assert alice_content == root_content
 
 
 def test_apply_without_certificates_does_not_write_openssl_ini(tmp_path) -> None:

tests/test_python.py

@@ -105,6 +105,22 @@ def test_apply_multiple_repositories(tmp_path) -> None:
     )
 
 
+def test_apply_writes_poetry_config_for_each_configured_user(tmp_path) -> None:
+    config = Configuration.model_validate(ONE_REPO_CONFIG)
+    dst = tmp_path / "dst"
+    context = Context(config=config, dst=dst, src=None, users=["alice"])
+
+    PythonModule().apply(context)
+
+    root_content = (dst / "root/.config/pypoetry/config.toml").read_text(
+        encoding="utf-8"
+    )
+    alice_content = (dst / "home/alice/.config/pypoetry/config.toml").read_text(
+        encoding="utf-8"
+    )
+    assert alice_content == root_content
+
+
 def test_apply_writes_distutils_cfg_for_detected_python_prefixes(tmp_path) -> None:
     config = Configuration.model_validate(ONE_REPO_CONFIG)
     src = tmp_path / "src"

tests/test_rust.py

@@ -6,7 +6,15 @@ CONFIG_WITH_REPO = {
     "uuid": "12345678-1234-5678-1234-567812345678",
     "organisation": "InterDiode",
     "configurations": {
-        "rust": {"repositories": [{"name": "demo", "url": "https://example.invalid/"}]}
+        "rust": {
+            "repositories": [
+                {
+                    "name": "demo",
+                    "url": "https://example.invalid/",
+                    "is_sparse": True,
+                }
+            ]
+        }
     },
 }
 
@@ -16,8 +24,16 @@ CONFIG_WITH_TWO_REPOS = {
     "configurations": {
         "rust": {
             "repositories": [
-                {"name": "demo", "url": "https://example.invalid/"},
+                {
-                {"name": "other", "url": "https://other.invalid/"},
+                    "name": "demo",
+                    "url": "https://example.invalid/",
+                    "is_sparse": True,
+                },
+                {
+                    "name": "other",
+                    "url": "https://other.invalid/",
+                    "is_sparse": True,
+                },
             ]
         }
     },
@@ -61,6 +77,91 @@ def test_apply_writes_replacement_source(tmp_path) -> None:
     )
 
 
+def test_apply_sanitizes_repository_names_with_special_characters(tmp_path) -> None:
+    data = {
+        "uuid": "12345678-1234-5678-1234-567812345678",
+        "organisation": "InterDiode",
+        "configurations": {
+            "rust": {
+                "repositories": [
+                    {
+                        "name": "weird.demo]\nname",
+                        "url": "https://example.invalid/",
+                        "is_sparse": True,
+                    }
+                ]
+            }
+        },
+    }
+    dst = tmp_path / "dst"
+    context = Context(config=make_config(data), dst=dst, src=None)
+
+    RustModule().apply(context)
+
+    config_toml = (dst / ".cargo/config.toml").read_text(encoding="utf-8")
+    assert config_toml == (
+        "[source.crates-io]\n"
+        'replace-with = "weird_demo__name"\n'
+        "\n"
+        "[source.weird_demo__name]\n"
+        'registry = "sparse+https://example.invalid/"\n'
+    )
+
+
+def test_apply_does_not_prefix_url_when_not_sparse(tmp_path) -> None:
+    data = {
+        "uuid": "12345678-1234-5678-1234-567812345678",
+        "organisation": "InterDiode",
+        "configurations": {
+            "rust": {
+                "repositories": [{"name": "demo", "url": "https://example.invalid/"}]
+            }
+        },
+    }
+    dst = tmp_path / "dst"
+    context = Context(config=make_config(data), dst=dst, src=None)
+
+    RustModule().apply(context)
+
+    config_toml = (dst / ".cargo/config.toml").read_text(encoding="utf-8")
+    assert config_toml == (
+        "[source.crates-io]\n"
+        'replace-with = "demo"\n'
+        "\n"
+        "[source.demo]\n"
+        'registry = "https://example.invalid/"\n'
+    )
+
+
+def test_apply_prefixes_url_with_sparse_when_configured(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    context = Context(config=make_config(CONFIG_WITH_REPO), dst=dst, src=None)
+
+    RustModule().apply(context)
+
+    config_toml = (dst / ".cargo/config.toml").read_text(encoding="utf-8")
+    assert config_toml == (
+        "[source.crates-io]\n"
+        'replace-with = "demo"\n'
+        "\n"
+        "[source.demo]\n"
+        'registry = "sparse+https://example.invalid/"\n'
+    )
+
+
+def test_apply_writes_cargo_config_for_each_configured_user(tmp_path) -> None:
+    dst = tmp_path / "dst"
+    context = Context(
+        config=make_config(CONFIG_WITH_REPO), dst=dst, src=None, users=["alice"]
+    )
+
+    RustModule().apply(context)
+
+    root_content = (dst / ".cargo/config.toml").read_text(encoding="utf-8")
+    alice_content = (dst / "home/alice/.cargo/config.toml").read_text(encoding="utf-8")
+    assert alice_content == root_content
+
+
 def test_apply_writes_additional_repositories_as_named_registries(tmp_path) -> None:
     dst = tmp_path / "dst"
     context = Context(config=make_config(CONFIG_WITH_TWO_REPOS), dst=dst, src=None)

tests/test_users.py

@@ -0,0 +1,110 @@
+from id_configurator.users import PasswdEntry, parse_login_defs_uid_min, parse_passwd
+
+PASSWD_CONTENT = (
+    "root:x:0:0:root:/root:/bin/bash\n"
+    "alice:x:1000:1000:Alice:/home/alice:/bin/bash\n"
+    "daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin\n"
+    "sync:x:4:65534:sync:/bin:/bin/sync\n"
+    "nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/false\n"
+    "# a comment\n"
+    "\n"
+)
+
+
+def test_parse_passwd_returns_one_entry_per_line() -> None:
+    entries = parse_passwd(PASSWD_CONTENT)
+    assert [entry.name for entry in entries] == [
+        "root",
+        "alice",
+        "daemon",
+        "sync",
+        "nobody",
+    ]
+
+
+def test_parse_passwd_skips_comments_and_blank_lines() -> None:
+    entries = parse_passwd(PASSWD_CONTENT)
+    assert len(entries) == 5
+
+
+def test_parse_passwd_extracts_uid_home_and_shell() -> None:
+    entries = {entry.name: entry for entry in parse_passwd(PASSWD_CONTENT)}
+    assert entries["alice"].uid == 1000
+    assert entries["alice"].home == "/home/alice"
+    assert entries["alice"].shell == "/bin/bash"
+
+
+def test_parse_passwd_skips_malformed_lines() -> None:
+    entries = parse_passwd(
+        "tooshort:x:0\nnotanumber:x:abc:0:x:/home/x:/bin/bash\n"
+        "root:x:0:0:root:/root:/bin/bash\n"
+    )
+    assert [entry.name for entry in entries] == ["root"]
+
+
+def test_has_login_shell_true_for_regular_shell() -> None:
+    entry = PasswdEntry(name="alice", uid=1000, home="/home/alice", shell="/bin/bash")  # noqa: B604
+    assert entry.has_login_shell is True
+
+
+def test_has_login_shell_false_for_nologin_sync_or_false() -> None:
+    nologin = PasswdEntry(
+        name="daemon",
+        uid=1,
+        home="/usr/sbin",
+        shell="/usr/sbin/nologin",  # noqa: B604
+    )
+    sync = PasswdEntry(name="sync", uid=4, home="/bin", shell="/bin/sync")  # noqa: B604
+    false_shell = PasswdEntry(
+        name="nobody",
+        uid=65534,
+        home="/nonexistent",
+        shell="/usr/sbin/false",  # noqa: B604
+    )
+    assert nologin.has_login_shell is False
+    assert sync.has_login_shell is False
+    assert false_shell.has_login_shell is False
+
+
+def test_is_regular_user_true_for_human_account() -> None:
+    entry = PasswdEntry(name="alice", uid=1000, home="/home/alice", shell="/bin/bash")  # noqa: B604
+    assert entry.is_regular_user() is True
+
+
+def test_is_regular_user_true_for_root_despite_uid_zero() -> None:
+    entry = PasswdEntry(name="root", uid=0, home="/root", shell="/bin/bash")  # noqa: B604
+    assert entry.is_regular_user() is True
+
+
+def test_is_regular_user_false_for_root_with_disabled_shell() -> None:
+    entry = PasswdEntry(name="root", uid=0, home="/root", shell="/usr/sbin/nologin")  # noqa: B604
+    assert entry.is_regular_user() is False
+
+
+def test_is_regular_user_false_for_disabled_shell_despite_high_uid() -> None:
+    entry = PasswdEntry(
+        name="nobody",
+        uid=65534,
+        home="/nonexistent",
+        shell="/usr/sbin/false",  # noqa: B604
+    )
+    assert entry.is_regular_user() is False
+
+
+def test_is_regular_user_honors_custom_uid_min() -> None:
+    entry = PasswdEntry(name="svc", uid=500, home="/home/svc", shell="/bin/bash")  # noqa: B604
+    assert entry.is_regular_user(uid_min=1000) is False
+    assert entry.is_regular_user(uid_min=100) is True
+
+
+def test_parse_login_defs_uid_min_found() -> None:
+    content = "# comment\nUID_MIN\t500\nGID_MIN\t500\n"
+    assert parse_login_defs_uid_min(content) == 500
+
+
+def test_parse_login_defs_uid_min_missing() -> None:
+    assert parse_login_defs_uid_min("GID_MIN\t500\n") is None
+
+
+def test_parse_login_defs_uid_min_malformed_value() -> None:
+    assert parse_login_defs_uid_min("UID_MIN\tnot-a-number\n") is None

tests/test_yum.py

@@ -313,10 +313,26 @@ def test_apply_matches_index_url_to_replace_with_unrelated_files_and_multiple_re
     assert (dst / "etc/yum.repos.d/second.repo").exists()
 
 
-def test_apply_sanitizes_repository_and_key_names_with_slash(
+def test_apply_sanitizes_key_name_with_slash(tmp_path, monkeypatch) -> None:
-    tmp_path, monkeypatch
-) -> None:
     mock_run = _mock_gpg_success(monkeypatch)
+    data = {
+        "uuid": "12345678-1234-5678-1234-567812345678",
+        "organisation": "InterDiode",
+        "configurations": {
+            "yum": {"keys": [{"name": "../../evil-key", "content": KEY_CONTENT}]}
+        },
+    }
+    dst = tmp_path / "dst"
+    context = Context(config=make_config(data), dst=dst, src=None)
+
+    YumModule().apply(context)
+
+    key_content = (dst / "etc/pki/rpm-gpg/RPM-GPG-KEY-.._.._evil-key").read_bytes()
+    assert key_content == b"fake-rpm-gpg-key-bytes"
+    mock_run.assert_called_once()
+
+
+def test_apply_sanitizes_repository_name_with_disallowed_characters(tmp_path) -> None:
     data = {
         "uuid": "12345678-1234-5678-1234-567812345678",
         "organisation": "InterDiode",
@@ -324,11 +340,10 @@ def test_apply_sanitizes_repository_and_key_names_with_slash(
             "yum": {
                 "repositories": [
                     {
-                        "name": "../../evil-repo",
+                        "name": "weird/repo]here[bad",
                         "index-url": "https://example.invalid/yum",
                     }
-                ],
+                ]
-                "keys": [{"name": "../../evil-key", "content": KEY_CONTENT}],
             }
         },
     }
@@ -337,10 +352,16 @@ def test_apply_sanitizes_repository_and_key_names_with_slash(
 
     YumModule().apply(context)
 
-    assert (dst / "etc/yum.repos.d/.._.._evil-repo.repo").exists()
+    repo_file = dst / "etc/yum.repos.d/weird_repo_here_bad.repo"
-    key_content = (dst / "etc/pki/rpm-gpg/RPM-GPG-KEY-.._.._evil-key").read_bytes()
+    assert repo_file.exists()
-    assert key_content == b"fake-rpm-gpg-key-bytes"
+    repo_content = repo_file.read_text(encoding="utf-8")
-    mock_run.assert_called_once()
+    assert repo_content == (
+        "[weird_repo_here_bad]\n"
+        "name=weird_repo_here_bad\n"
+        "baseurl=https://example.invalid/yum\n"
+        "enabled=1\n"
+        "gpgcheck=0\n"
+    )
 
 
 def test_import_key_raises_when_gpg_binary_missing(tmp_path, monkeypatch) -> None: