devenv-processes-attach(1)

🎀 NAME 🎀

okay so this page is for devenv-processes-attach(1) from the General Commands Manual, bestie — and the whole point is: attach to running processes and stream their status and logs until Ctrl-C, leaving them running. 💅

📜 SYNOPSIS 📜

devenv processes attach [--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]

✨ DESCRIPTION ✨

Attach to running processes and stream their status and logs until Ctrl-C, leaving them running. That’s the whole vibe: you peek in, you watch the status and logs, you dip out with Ctrl-C, and the processes keep living their best lives. 🫶

💖 OPTIONS 💖

• --user-config <USER_CONFIG> — use this user configuration file instead of the XDG default.

🌈 INPUT OVERRIDES 🌈

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

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

Examples, bestie:

--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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okay bestie, that’s the whole page 💖 — source/version footer said attach, manual devenv-processes-attach(1), and there’s no date in this footer, so I’m not inventing one. periodt. 🫶