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nix3-flake-metadata(1) General Commands Manual nix3-flake-metadata(1) Warning This program is experimental and its interface is subject to change. Name nix flake metadata - show flake metadata Synopsis nix flake metadata [option...] flake-url Examples * Show what dwarffs resolves to: # nix flake metadata dwarffs Resolved URL: github:edolstra/dwarffs Locked URL: github:edolstra/dwarffs/f691e2c991e75edb22836f1dbe632c40324215c5 Description: A filesystem that fetches DWARF debug info from the Internet on demand Path: /nix/store/769s05vjydmc2lcf6b02az28wsa9ixh1-source Revision: f691e2c991e75edb22836f1dbe632c40324215c5 Last modified: 2021-01-21 15:41:26 Inputs: aaaanix: github:NixOS/nix/6254b1f5d298ff73127d7b0f0da48f142bdc753c a aaaalowdown-src: github:kristapsdz/lowdown/1705b4a26fbf065d9574dce47a94e8c7c79e052f a aaaanixpkgs: github:NixOS/nixpkgs/ad0d20345219790533ebe06571f82ed6b034db31 aaaanixpkgs follows input 'nix/nixpkgs' * Show information about dwarffs in JSON format: # nix flake metadata dwarffs --json | jq . { "description": "A filesystem that fetches DWARF debug info from the Internet on demand", "lastModified": 1597153508, "locked": { "lastModified": 1597153508, "narHash": "sha256-VHg3MYVgQ12LeRSU2PSoDeKlSPD8PYYEFxxwkVVDRd0=", "owner": "edolstra", "repo": "dwarffs", "rev": "d181d714fd36eb06f4992a1997cd5601e26db8f5", "type": "github" }, "locks": { ... }, "original": { "id": "dwarffs", "type": "indirect" }, "originalUrl": "flake:dwarffs", "path": "/nix/store/hang3792qwdmm2n0d9nsrs5n6bsws6kv-source", "resolved": { "owner": "edolstra", "repo": "dwarffs", "type": "github" }, "resolvedUrl": "github:edolstra/dwarffs", "revision": "d181d714fd36eb06f4992a1997cd5601e26db8f5", "url": "github:edolstra/dwarffs/d181d714fd36eb06f4992a1997cd5601e26db8f5" } Description This command shows information about the flake specified by the flake ref- erence flake-url. It resolves the flake reference using the flake registry, fetches it, and prints some meta data. This includes: * Resolved URL: If flake-url is a flake identifier, then this is the flake reference that specifies its actual location, looked up in the flake registry. * Locked URL: A flake reference that contains a commit or content hash and thus uniquely identifies a specific flake version. * Description: A one-line description of the flake, taken from the de- scription field in flake.nix. * Path: The store path containing the source code of the flake. * Revision: The Git or Mercurial commit hash of the locked flake. * Revisions: The number of ancestors of the Git or Mercurial commit of the locked flake. Note that this is not available for github flakes. * Last modified: For Git or Mercurial flakes, this is the commit time of the commit of the locked flake; for tarball flakes, it's the most recent timestamp of any file inside the tarball. * Inputs: The flake inputs with their corresponding lock file entries. With --json, the output is a JSON object with the following fields: * original and originalUrl: The flake reference specified by the user (flake-url) in attribute set and URL representation. * resolved and resolvedUrl: The resolved flake reference (see above) in attribute set and URL representation. * locked and lockedUrl: The locked flake reference (see above) in at- tribute set and URL representation. * description: See Description above. * path: See Path above. * revision: See Revision above. * revCount: See Revisions above. * lastModified: See Last modified above. * locks: The contents of flake.lock. Options * --json Produce output in JSON format, suitable for consumption by another pro- gram. * --no-pretty Print compact JSON output on a single line, even when the output is a terminal. Some commands may print multiple JSON objects on separate lines. See `--pretty`. * --pretty Print multi-line, indented JSON output for readability. Default: indent if output is to a terminal. This option is only effective when `--json` is also specified. Common evaluation options * --arg name expr Pass the value expr as the argument name to Nix functions. * --arg-from-file name path Pass the contents of file path as the argument name to Nix functions. * --arg-from-stdin name Pass the contents of stdin as the argument name to Nix functions. * --argstr name string Pass the string string as the argument name to Nix functions. * --debugger Start an interactive environment if evaluation fails. * --eval-store store-url The URL of the Nix store to use for evaluation, i.e. to store deriva- tions (.drv files) and inputs referenced by them. * --impure Allow access to mutable paths and repositories. * --include / -I path Add path to search path entries used to resolve lookup paths This option may be given multiple times. Paths added through -I take precedence over the nix-path configuration setting and the NIX_PATH environment variable. * --override-flake original-ref resolved-ref Override the flake registries, redirecting original-ref to resolved-ref. Common flake-related options * --commit-lock-file Commit changes to the flake's lock file. * --inputs-from flake-url Use the inputs of the specified flake as registry entries. * --no-registries Don't allow lookups in the flake registries. DEPRECATED Use --no-use-registries instead. * --no-update-lock-file Do not allow any updates to the flake's lock file. * --no-write-lock-file Do not write the flake's newly generated lock file. * --output-lock-file flake-lock-path Write the given lock file instead of flake.lock within the top-level flake. * --override-input input-path flake-url Override a specific flake input (e.g. dwarffs/nixpkgs). This implies --no-write-lock-file. * --recreate-lock-file Recreate the flake's lock file from scratch. DEPRECATED Use nix flake update instead. * --reference-lock-file flake-lock-path Read the given lock file instead of flake.lock within the top-level flake. * --update-input input-path Update a specific flake input (ignoring its previous entry in the lock file). DEPRECATED Use nix flake update instead. Logging-related options * --debug Set the logging verbosity level to `debug'. * --log-format format Set the format of log output; one of raw, internal-json, bar or bar- with-logs. * --print-build-logs / -L Print full build logs on standard error. * --quiet Decrease the logging verbosity level. * --verbose / -v Increase the logging verbosity level. Miscellaneous global options * --help Show usage information. * --offline Disable substituters and consider all previously downloaded files up-to- date. * --option name value Set the Nix configuration setting name to value (overriding nix.conf). * --refresh Consider all previously downloaded files out-of-date. * --repair During evaluation, rewrite missing or corrupted files in the Nix store. During building, rebuild missing or corrupted store paths. * --version Show version information. Note See man nix.conf for overriding configuration settings with command line flags. nix3-flake-metadata(1)
Name | Synopsis | Examples | Description | Options
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