devenv-machines-apply(1)

okay bestie, welcome to devenv-machines-apply(1) from the General Commands Manual — the devenv machines apply page, now with group-chat energy and zero lost flags. 💅

🎀 NAME 🎀

devenv-machines-apply — apply every pinned role in a reviewed fleet deployment plan. That's the whole main-character job, and yes, every pinned role. No cap. ✨

✨ SYNOPSIS ✨

devenv machines apply [--max-concurrent] [--user-config] [--from]
       [-o|--override-input] [-O|--option] [-j|--max-jobs] [-u|--cores]
       [-s|--system] [-i|--impure] [--no-impure] [--offline] [--nix-option]
       [--nix-debugger] [-c|--clean] [-P|--profile] [--reload] [--no-reload]
       [--shell] [--eval-cache] [--no-eval-cache] [--refresh-eval-cache]
       [--refresh-task-cache] [--secretspec-provider] [--secretspec-profile]
       [--trace-to] [-v|--verbose] [-q|--quiet] [--tui] [--no-tui] [-h|--help]
       <PLAN>

💖 DESCRIPTION 💖

Apply every pinned role in a reviewed fleet deployment plan. It's giving “fleet deployment, but make it reviewed and pinned.” 💅

🔥 OPTIONS 🔥

• --max-concurrent <N> — activate at most N machines per batch (default: 1). Stop after a failed batch.
• --user-config <USER_CONFIG> — use this user configuration file instead of the XDG default
• <PLAN> — saved plan ID, or an exported JSON file.

bestie, that "stop after a failed batch" is important — it does not keep rolling on like nothing happened. 🫶

🌈 INPUT OVERRIDES 🌈

• --from <FROM> — source for devenv.nix.

Can be either a filesystem path (with path: prefix) or a flake input reference.

Examples:

--from github:cachix/devenv
--from github:cachix/devenv?dir=examples/simple
--from path:/absolute/path/to/project
--from path:./relative/path

• -o, --override-input <NAME> <URI> — override inputs in devenv.yaml.

Examples:

--override-input nixpkgs github:NixOS/nixpkgs/nixos-unstable
--override-input nixpkgs path:/path/to/local/nixpkgs

• -O, --option <OPTION:TYPE> <VALUE> — override configuration options with typed values.

OPTION must include a type: <attribute>:<type> Supported types: string, int, float, bool, path, pkg, pkgs

List types (pkgs) append to existing values by default. Add a ! suffix to replace instead: pkgs!

Examples:

--option languages.rust.channel:string beta
--option services.postgres.enable:bool true
--option languages.python.version:string 3.10
--option packages:pkgs "ncdu git"       (appends to packages)
--option packages:pkgs! "ncdu git"      (replaces all packages)

🧚 NIX OPTIONS 🧚

• -j, --max-jobs <MAX_JOBS> — maximum number of Nix builds to run concurrently.

Defaults to 1/4 of available CPU cores (minimum 1).

• -u, --cores <CORES> — number of CPU cores available to each build.

Defaults to available cores divided by max-jobs (minimum 1).

• -s, --system <SYSTEM> — override the target system.

Defaults to the host system (e.g. aarch64-darwin, x86_64-linux).

• -i, --impure — relax the hermeticity of the environment.
• --no-impure — force a hermetic environment, overriding config.
• --offline — disable substituters and consider all previously downloaded files up-to-date.
• --nix-option <NAME> <VALUE> — pass additional options to nix commands.

These options are passed directly to Nix using the --option flag. See man nix.conf for the full list of available options.

Examples:

--nix-option sandbox false
--nix-option keep-outputs true
--nix-option system x86_64-darwin

• --nix-debugger — enter the Nix debugger on failure.

🐚 SHELL OPTIONS 🐚

• -c, --clean [<CLEAN>...] — ignore existing environment variables when entering the shell. Pass a list of comma-separated environment variables to let through.
• -P, --profile <PROFILES> — activate one or more profiles defined in devenv.nix.

Profiles allow you to define different configurations that can be merged with your base configuration.

See https://devenv.sh/profiles for more information.

Examples:

--profile python-3.14
--profile backend --profile fast-startup

• --reload — enable auto-reload when config files change (default).
• --no-reload — disable auto-reload when config files change.
• --shell <SHELL_TYPE> — shell to use for interactive sessions (bash, zsh, fish, nu).

Possible values:

• bash
• zsh
• fish
• nu

🍓 CACHE OPTIONS 🍓

• --eval-cache — enable caching of Nix evaluation results (default).
• --no-eval-cache — disable caching of Nix evaluation results.
• --refresh-eval-cache — force a refresh of the Nix evaluation cache.
• --refresh-task-cache — force a refresh of the task cache.

🔐 SECRETSPEC OPTIONS 🔐

• --secretspec-provider <SECRETSPEC_PROVIDER> — override the secretspec provider
• --secretspec-profile <SECRETSPEC_PROFILE> — override the secretspec profile

🦋 TRACING OPTIONS 🦋

• --trace-to <TRACE_TO> — enable tracing and set output destination(s). Can be repeated for multiple outputs.

Syntax: [format:]destination

Examples:

--trace-to stderr                              # json to stderr
--trace-to pretty:stderr                       # pretty format to stderr
--trace-to json:file:/tmp/trace.json           # JSON to file
--trace-to otlp-grpc                           # OTLP gRPC to default endpoint
--trace-to otlp-grpc:http://collector:4317     # OTLP gRPC to custom endpoint

Multiple outputs:

--trace-to pretty:stderr --trace-to json:file:/tmp/t.json

Destinations: stdout, stderr, file:<path>, http(s)://<host>:<port> Formats: json (default), pretty, full, otlp-grpc, otlp-http-protobuf, otlp-http-json

When format is omitted, defaults to json. Tracing is disabled by default.

[env: DEVENV_TRACE_TO=] (comma-separated) [env: DEVENV_TRACE_DEFAULT_TO=] (comma-separated, used only when no explicit tracing is configured; set to empty string to suppress)

👑 GLOBAL OPTIONS 👑

• -v, --verbose — enable additional debug logs.
• -q, --quiet — silence all logs
• --tui <TUI> — enable the interactive terminal interface (default when interactive).

Possible values:

• true
• false

• --no-tui — disable the interactive terminal interface.
• -h, --help — print help (see a summary with '-h')

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mwah 🫶 — source/version vibes: apply · manual: devenv-machines-apply(1) · date: the footer didn’t print one, so no invented timestamp, periodt. 💜