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100 lines
3.1 KiB
Markdown
100 lines
3.1 KiB
Markdown
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R""(
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# Examples
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* Show what `nixpkgs` resolves to:
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```console
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# nix flake info nixpkgs
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Resolved URL: github:NixOS/nixpkgs
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Locked URL: github:NixOS/nixpkgs/b67ba0bfcc714453cdeb8d713e35751eb8b4c8f4
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Description: A collection of packages for the Nix package manager
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Path: /nix/store/23qapccs6cfmwwrlq8kr41vz5vdmns3r-source
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Revision: b67ba0bfcc714453cdeb8d713e35751eb8b4c8f4
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Last modified: 2020-12-23 12:36:12
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```
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* Show information about `dwarffs` in JSON format:
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```console
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# nix flake info dwarffs --json | jq .
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{
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"description": "A filesystem that fetches DWARF debug info from the Internet on demand",
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"lastModified": 1597153508,
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"locked": {
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"lastModified": 1597153508,
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"narHash": "sha256-VHg3MYVgQ12LeRSU2PSoDeKlSPD8PYYEFxxwkVVDRd0=",
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"owner": "edolstra",
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"repo": "dwarffs",
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"rev": "d181d714fd36eb06f4992a1997cd5601e26db8f5",
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"type": "github"
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},
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"original": {
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"id": "dwarffs",
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"type": "indirect"
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},
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"originalUrl": "flake:dwarffs",
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"path": "/nix/store/hang3792qwdmm2n0d9nsrs5n6bsws6kv-source",
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"resolved": {
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"owner": "edolstra",
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"repo": "dwarffs",
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"type": "github"
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},
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"resolvedUrl": "github:edolstra/dwarffs",
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"revision": "d181d714fd36eb06f4992a1997cd5601e26db8f5",
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"url": "github:edolstra/dwarffs/d181d714fd36eb06f4992a1997cd5601e26db8f5"
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}
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```
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# Description
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This command shows information about the flake specified by the flake
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reference *flake-url*. It resolves the flake reference using the
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[flake registry](./nix3-registry.md), fetches it, and prints some meta
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data. This includes:
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* `Resolved URL`: If *flake-url* is a flake identifier, then this is
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the flake reference that specifies its actual location, looked up in
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the flake registry.
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* `Locked URL`: A flake reference that contains a commit or content
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hash and thus uniquely identifies a specific flake version.
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* `Description`: A one-line description of the flake, taken from the
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`description` field in `flake.nix`.
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* `Path`: The store path containing the source code of the flake.
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* `Revision`: The Git or Mercurial commit hash of the locked flake.
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* `Revisions`: The number of ancestors of the Git or Mercurial commit
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of the locked flake. Note that this is not available for `github`
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flakes.
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* `Last modified`: For Git or Mercurial flakes, this is the commit
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time of the commit of the locked flake; for tarball flakes, it's the
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most recent timestamp of any file inside the tarball.
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With `--json`, the output is a JSON object with the following fields:
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* `original` and `originalUrl`: The flake reference specified by the
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user (*flake-url*) in attribute set and URL representation.
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* `resolved` and `resolvedUrl`: The resolved flake reference (see
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above) in attribute set and URL representation.
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* `locked` and `lockedUrl`: The locked flake reference (see above) in
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attribute set and URL representation.
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* `description`: See `Description` above.
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* `path`: See `Path` above.
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* `revision`: See `Revision` above.
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* `revCount`: See `Revisions` above.
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* `lastModified`: See `Last modified` above.
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)""
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