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use separate paragraphs inside list items
This commit is contained in:
Valentin Gagarin
parent
e48abec567
commit
4f340213bb
@ -27,7 +27,8 @@ The moving parts of channels are:
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This command has the following operations:
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- `--add` *url* \[*name*\]\
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- `--add` *url* \[*name*\]
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Add a channel *name* located at *url* to the list of subscribed channels.
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If *name* is omitted, default to the last component of *url*, with the suffixes `-stable` or `-unstable` removed.
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@ -39,17 +40,21 @@ This command has the following operations:
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A channel URL must point to a directory containing a file `nixexprs.tar.gz`.
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At the top level, that tarball must contain a single directory with a `default.nix` file that serves as the channel’s entry point.
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- `--remove` *name*\
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- `--remove` *name*
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Remove the channel *name* from the list of subscribed channels.
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- `--list`\
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- `--list`
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Print the names and URLs of all subscribed channels on standard output.
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- `--update` \[*names*…\]\
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- `--update` \[*names*…\]
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Download the Nix expressions of subscribed channels and create a new generation.
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Update all channels if none is specified, and only those included in *names* otherwise.
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- `--list-generations`\
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- `--list-generations`
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Prints a list of all the current existing generations for the
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channel profile.
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@ -58,7 +63,8 @@ This command has the following operations:
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nix-env --profile /nix/var/nix/profiles/per-user/$USER/channels --list-generations
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```
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- `--rollback` \[*generation*\]\
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- `--rollback` \[*generation*\]
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Revert channels to the state before the last call to `nix-channel --update`.
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Optionally, you can specify a specific channel *generation* number to restore.
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@ -48,12 +48,14 @@ Instead, it looks in a few locations, and acts on all profiles it finds there:
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These options are for deleting old [profiles] prior to deleting unreachable [store objects].
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- <span id="opt-delete-old">[`--delete-old`](#opt-delete-old)</span> / `-d`\
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- <span id="opt-delete-old">[`--delete-old`](#opt-delete-old)</span> / `-d`
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Delete all old generations of profiles.
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This is the equivalent of invoking [`nix-env --delete-generations old`](@docroot@/command-ref/nix-env/delete-generations.md#generations-old) on each found profile.
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- <span id="opt-delete-older-than">[`--delete-older-than`](#opt-delete-older-than)</span> *period*\
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- <span id="opt-delete-older-than">[`--delete-older-than`](#opt-delete-older-than)</span> *period*
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Delete all generations of profiles older than the specified amount (except for the generations that were active at that point in time).
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*period* is a value such as `30d`, which would mean 30 days.
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@ -12,7 +12,8 @@ This operation deletes the specified generations of the current profile.
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*generations* can be a one of the following:
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- <span id="generations-list">[`<number>...`](#generations-list)</span>:\
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- <span id="generations-list">[`<number>...`](#generations-list)</span>
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A list of generation numbers, each one a separate command-line argument.
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Delete exactly the profile generations given by their generation number.
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@ -30,7 +31,8 @@ This operation deletes the specified generations of the current profile.
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> Because one can roll back to a previous generation, it is possible to have generations newer than the current one.
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> They will also be deleted.
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- <span id="generations-time">[`<number>d`](#generations-time)</span>:\
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- <span id="generations-time">[`<number>d`](#generations-time)</span>
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The last *number* days
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*Example*: `30d`
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@ -38,7 +40,8 @@ This operation deletes the specified generations of the current profile.
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Delete all generations created more than *number* days ago, except the most recent one of them.
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This allows rolling back to generations that were available within the specified period.
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- <span id="generations-count">[`+<number>`](#generations-count)</span>:\
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- <span id="generations-count">[`+<number>`](#generations-count)</span>
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The last *number* generations up to the present
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*Example*: `+5`
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@ -1,6 +1,7 @@
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# Environment variables
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- `NIX_PROFILE`\
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- `NIX_PROFILE`
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Location of the Nix profile. Defaults to the target of the symlink
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`~/.nix-profile`, if it exists, or `/nix/var/nix/profiles/default`
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otherwise.
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@ -2,7 +2,8 @@
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The following options are allowed for all `nix-env` operations, but may not always have an effect.
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- `--file` / `-f` *path*\
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- `--file` / `-f` *path*
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Specifies the Nix expression (designated below as the *active Nix
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expression*) used by the `--install`, `--upgrade`, and `--query
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--available` operations to obtain derivations. The default is
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@ -13,13 +14,15 @@ The following options are allowed for all `nix-env` operations, but may not alwa
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unpacked to a temporary location. The tarball must include a single
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top-level directory containing at least a file named `default.nix`.
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- `--profile` / `-p` *path*\
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- `--profile` / `-p` *path*
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Specifies the profile to be used by those operations that operate on
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a profile (designated below as the *active profile*). A profile is a
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sequence of user environments called *generations*, one of which is
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the *current generation*.
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- `--dry-run`\
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- `--dry-run`
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For the `--install`, `--upgrade`, `--uninstall`,
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`--switch-generation`, `--delete-generations` and `--rollback`
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operations, this flag will cause `nix-env` to print what *would* be
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@ -29,7 +32,8 @@ The following options are allowed for all `nix-env` operations, but may not alwa
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[substituted](@docroot@/glossary.md) (i.e., downloaded) and which paths
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will be built from source (because no substitute is available).
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- `--system-filter` *system*\
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- `--system-filter` *system*
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By default, operations such as `--query
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--available` show derivations matching any platform. This option
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allows you to use derivations for the specified platform *system*.
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@ -35,11 +35,13 @@ The derivations are sorted by their `name` attributes.
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The following flags specify the set of things on which the query
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operates.
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- `--installed`\
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- `--installed`
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The query operates on the store paths that are installed in the
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current generation of the active profile. This is the default.
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- `--available`; `-a`\
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- `--available` / `-a`
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The query operates on the derivations that are available in the
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active Nix expression.
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@ -50,24 +52,28 @@ selected derivations. Multiple flags may be specified, in which case the
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information is shown in the order given here. Note that the name of the
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derivation is shown unless `--no-name` is specified.
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- `--xml`\
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- `--xml`
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Print the result in an XML representation suitable for automatic
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processing by other tools. The root element is called `items`, which
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contains a `item` element for each available or installed
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derivation. The fields discussed below are all stored in attributes
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of the `item` elements.
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- `--json`\
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- `--json`
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Print the result in a JSON representation suitable for automatic
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processing by other tools.
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- `--prebuilt-only` / `-b`\
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- `--prebuilt-only` / `-b`
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Show only derivations for which a substitute is registered, i.e.,
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there is a pre-built binary available that can be downloaded in lieu
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of building the derivation. Thus, this shows all packages that
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probably can be installed quickly.
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- `--status`; `-s`\
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- `--status` / `-s`
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Print the *status* of the derivation. The status consists of three
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characters. The first is `I` or `-`, indicating whether the
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derivation is currently installed in the current generation of the
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@ -78,49 +84,61 @@ derivation is shown unless `--no-name` is specified.
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derivation to be built. The third is `S` or `-`, indicating whether
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a substitute is available for the derivation.
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- `--attr-path`; `-P`\
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- `--attr-path` / `-P`
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Print the *attribute path* of the derivation, which can be used to
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unambiguously select it using the `--attr` option available in
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commands that install derivations like `nix-env --install`. This
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option only works together with `--available`
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- `--no-name`\
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- `--no-name`
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Suppress printing of the `name` attribute of each derivation.
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- `--compare-versions` / `-c`\
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- `--compare-versions` / `-c`
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Compare installed versions to available versions, or vice versa (if
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`--available` is given). This is useful for quickly seeing whether
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upgrades for installed packages are available in a Nix expression. A
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column is added with the following meaning:
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- `<` *version*\
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- `<` *version*
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A newer version of the package is available or installed.
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- `=` *version*\
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- `=` *version*
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At most the same version of the package is available or
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installed.
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- `>` *version*\
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- `>` *version*
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Only older versions of the package are available or installed.
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- `- ?`\
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- `- ?`
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No version of the package is available or installed.
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- `--system`\
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- `--system`
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Print the `system` attribute of the derivation.
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- `--drv-path`\
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- `--drv-path`
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Print the path of the [store derivation](@docroot@/glossary.md#gloss-store-derivation).
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- `--out-path`\
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- `--out-path`
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Print the output path of the derivation.
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- `--description`\
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- `--description`
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Print a short (one-line) description of the derivation, if
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available. The description is taken from the `meta.description`
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attribute of the derivation.
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- `--meta`\
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- `--meta`
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Print all of the meta-attributes of the derivation. This option is
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only available with `--xml` or `--json`.
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@ -28,36 +28,42 @@ version is installed.
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# Flags
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- `--lt`\
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- `--lt`
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Only upgrade a derivation to newer versions. This is the default.
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- `--leq`\
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- `--leq`
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In addition to upgrading to newer versions, also “upgrade” to
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derivations that have the same version. Version are not a unique
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identification of a derivation, so there may be many derivations
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that have the same version. This flag may be useful to force
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“synchronisation” between the installed and available derivations.
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- `--eq`\
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- `--eq`
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*Only* “upgrade” to derivations that have the same version. This may
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not seem very useful, but it actually is, e.g., when there is a new
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release of Nixpkgs and you want to replace installed applications
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with the same versions built against newer dependencies (to reduce
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the number of dependencies floating around on your system).
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- `--always`\
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- `--always`
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In addition to upgrading to newer versions, also “upgrade” to
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derivations that have the same or a lower version. I.e., derivations
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may actually be downgraded depending on what is available in the
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active Nix expression.
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- `--prebuilt-only` / `-b`\
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- `--prebuilt-only` / `-b`
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Use only derivations for which a substitute is registered, i.e.,
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there is a pre-built binary available that can be downloaded in lieu
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of building the derivation. Thus, no packages will be built from
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source.
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- `--preserve-installed` / `-P`\
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- `--preserve-installed` / `-P`
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Do not remove derivations with a name matching one of the
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derivations being installed. Usually, trying to have two versions of
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the same package installed in the same generation of a profile will
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@ -29,7 +29,8 @@ md5sum`.
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# Options
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- `--flat`\
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- `--flat`
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Print the cryptographic hash of the contents of each regular file *path*.
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That is, instead of computing
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the hash of the [Nix Archive (NAR)](@docroot@/store/file-system-object/content-address.md#serial-nix-archive) of *path*,
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@ -38,43 +39,53 @@ md5sum`.
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The result is identical to that produced by the GNU commands
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`md5sum` and `sha1sum`.
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- `--base16`\
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- `--base16`
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Print the hash in a hexadecimal representation (default).
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- `--base32`\
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- `--base32`
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Print the hash in a base-32 representation rather than hexadecimal.
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This base-32 representation is more compact and can be used in Nix
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expressions (such as in calls to `fetchurl`).
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- `--base64`\
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- `--base64`
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Similar to --base32, but print the hash in a base-64 representation,
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which is more compact than the base-32 one.
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- `--sri`\
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- `--sri`
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Print the hash in SRI format with base-64 encoding.
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The type of hash algorithm will be prepended to the hash string,
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followed by a hyphen (-) and the base-64 hash body.
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|
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- `--truncate`\
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- `--truncate`
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|
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Truncate hashes longer than 160 bits (such as SHA-256) to 160 bits.
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|
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- `--type` *hashAlgo*\
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- `--type` *hashAlgo*
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Use the specified cryptographic hash algorithm, which can be one of
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`md5`, `sha1`, `sha256`, and `sha512`.
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||||
- `--to-base16`\
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- `--to-base16`
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||||
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Don’t hash anything, but convert the base-32 hash representation
|
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*hash* to hexadecimal.
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||||
|
||||
- `--to-base32`\
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- `--to-base32`
|
||||
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Don’t hash anything, but convert the hexadecimal hash representation
|
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*hash* to base-32.
|
||||
|
||||
- `--to-base64`\
|
||||
- `--to-base64`
|
||||
|
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Don’t hash anything, but convert the hexadecimal hash representation
|
||||
*hash* to base-64.
|
||||
|
||||
- `--to-sri`\
|
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- `--to-sri`
|
||||
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||||
Don’t hash anything, but convert the hexadecimal hash representation
|
||||
*hash* to SRI.
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||||
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@ -30,14 +30,17 @@ standard input.
|
||||
|
||||
# Options
|
||||
|
||||
- `--add-root` *path*\
|
||||
- `--add-root` *path*
|
||||
|
||||
See the [corresponding option](nix-store.md) in `nix-store`.
|
||||
|
||||
- `--parse`\
|
||||
- `--parse`
|
||||
|
||||
Just parse the input files, and print their abstract syntax trees on
|
||||
standard output as a Nix expression.
|
||||
|
||||
- `--eval`\
|
||||
- `--eval`
|
||||
|
||||
Just parse and evaluate the input files, and print the resulting
|
||||
values on standard output. No instantiation of store derivations
|
||||
takes place.
|
||||
@ -80,14 +83,16 @@ standard input.
|
||||
> </expr>
|
||||
> ```
|
||||
|
||||
- `--find-file`\
|
||||
- `--find-file`
|
||||
|
||||
Look up the given files in Nix’s search path (as specified by the
|
||||
`NIX_PATH` environment variable). If found, print the corresponding
|
||||
absolute paths on standard output. For instance, if `NIX_PATH` is
|
||||
`nixpkgs=/home/alice/nixpkgs`, then `nix-instantiate --find-file
|
||||
nixpkgs/default.nix` will print `/home/alice/nixpkgs/default.nix`.
|
||||
|
||||
- `--strict`\
|
||||
- `--strict`
|
||||
|
||||
When used with `--eval`, recursively evaluate list elements and
|
||||
attributes. Normally, such sub-expressions are left unevaluated
|
||||
(since the Nix language is lazy).
|
||||
@ -97,17 +102,20 @@ standard input.
|
||||
> This option can cause non-termination, because lazy data
|
||||
> structures can be infinitely large.
|
||||
|
||||
- `--json`\
|
||||
- `--json`
|
||||
|
||||
When used with `--eval`, print the resulting value as an JSON
|
||||
representation of the abstract syntax tree rather than as a Nix expression.
|
||||
|
||||
- `--xml`\
|
||||
- `--xml`
|
||||
|
||||
When used with `--eval`, print the resulting value as an XML
|
||||
representation of the abstract syntax tree rather than as a Nix expression.
|
||||
The schema is the same as that used by the [`toXML`
|
||||
built-in](../language/builtins.md).
|
||||
|
||||
- `--read-write-mode`\
|
||||
- `--read-write-mode`
|
||||
|
||||
When used with `--eval`, perform evaluation in read/write mode so
|
||||
nix language features that require it will still work (at the cost
|
||||
of needing to do instantiation of every evaluated derivation). If
|
||||
|
||||
@ -39,23 +39,28 @@ the path of the downloaded file in the Nix store is also printed.
|
||||
|
||||
# Options
|
||||
|
||||
- `--type` *hashAlgo*\
|
||||
- `--type` *hashAlgo*
|
||||
|
||||
Use the specified cryptographic hash algorithm,
|
||||
which can be one of `md5`, `sha1`, `sha256`, and `sha512`.
|
||||
The default is `sha256`.
|
||||
|
||||
- `--print-path`\
|
||||
- `--print-path`
|
||||
|
||||
Print the store path of the downloaded file on standard output.
|
||||
|
||||
- `--unpack`\
|
||||
- `--unpack`
|
||||
|
||||
Unpack the archive (which must be a tarball or zip file) and add the
|
||||
result to the Nix store. The resulting hash can be used with
|
||||
functions such as Nixpkgs’s `fetchzip` or `fetchFromGitHub`.
|
||||
|
||||
- `--executable`\
|
||||
- `--executable`
|
||||
|
||||
Set the executable bit on the downloaded file.
|
||||
|
||||
- `--name` *name*\
|
||||
- `--name` *name*
|
||||
|
||||
Override the name of the file in the Nix store. By default, this is
|
||||
`hash-basename`, where *basename* is the last component of *url*.
|
||||
Overriding the name is necessary when *basename* contains characters
|
||||
|
||||
@ -60,7 +60,8 @@ All options not listed here are passed to `nix-store
|
||||
--realise`, except for `--arg` and `--attr` / `-A` which are passed to
|
||||
`nix-instantiate`.
|
||||
|
||||
- `--command` *cmd*\
|
||||
- `--command` *cmd*
|
||||
|
||||
In the environment of the derivation, run the shell command *cmd*.
|
||||
This command is executed in an interactive shell. (Use `--run` to
|
||||
use a non-interactive shell instead.) However, a call to `exit` is
|
||||
@ -70,34 +71,40 @@ All options not listed here are passed to `nix-store
|
||||
drop you into the interactive shell. This can be useful for doing
|
||||
any additional initialisation.
|
||||
|
||||
- `--run` *cmd*\
|
||||
- `--run` *cmd*
|
||||
|
||||
Like `--command`, but executes the command in a non-interactive
|
||||
shell. This means (among other things) that if you hit Ctrl-C while
|
||||
the command is running, the shell exits.
|
||||
|
||||
- `--exclude` *regexp*\
|
||||
- `--exclude` *regexp*
|
||||
|
||||
Do not build any dependencies whose store path matches the regular
|
||||
expression *regexp*. This option may be specified multiple times.
|
||||
|
||||
- `--pure`\
|
||||
- `--pure`
|
||||
|
||||
If this flag is specified, the environment is almost entirely
|
||||
cleared before the interactive shell is started, so you get an
|
||||
environment that more closely corresponds to the “real” Nix build. A
|
||||
few variables, in particular `HOME`, `USER` and `DISPLAY`, are
|
||||
retained.
|
||||
|
||||
- `--packages` / `-p` *packages*…\
|
||||
- `--packages` / `-p` *packages*…
|
||||
|
||||
Set up an environment in which the specified packages are present.
|
||||
The command line arguments are interpreted as attribute names inside
|
||||
the Nix Packages collection. Thus, `nix-shell --packages libjpeg openjdk`
|
||||
will start a shell in which the packages denoted by the attribute
|
||||
names `libjpeg` and `openjdk` are present.
|
||||
|
||||
- `-i` *interpreter*\
|
||||
- `-i` *interpreter*
|
||||
|
||||
The chained script interpreter to be invoked by `nix-shell`. Only
|
||||
applicable in `#!`-scripts (described below).
|
||||
|
||||
- `--keep` *name*\
|
||||
- `--keep` *name*
|
||||
|
||||
When a `--pure` shell is started, keep the listed environment
|
||||
variables.
|
||||
|
||||
@ -105,7 +112,8 @@ All options not listed here are passed to `nix-store
|
||||
|
||||
# Environment variables
|
||||
|
||||
- `NIX_BUILD_SHELL`\
|
||||
- `NIX_BUILD_SHELL`
|
||||
|
||||
Shell used to start the interactive environment. Defaults to the
|
||||
`bash` found in `<nixpkgs>`, falling back to the `bash` found in
|
||||
`PATH` if not found.
|
||||
|
||||
@ -16,7 +16,8 @@ public url or broke since the download expression was written.
|
||||
|
||||
This operation has the following options:
|
||||
|
||||
- `--recursive`\
|
||||
- `--recursive`
|
||||
|
||||
Use recursive instead of flat hashing mode, used when adding
|
||||
directories to the store.
|
||||
|
||||
|
||||
@ -14,18 +14,21 @@ reachable via file system references from a set of “roots”, are deleted.
|
||||
|
||||
The following suboperations may be specified:
|
||||
|
||||
- `--print-roots`\
|
||||
- `--print-roots`
|
||||
|
||||
This operation prints on standard output the set of roots used by
|
||||
the garbage collector.
|
||||
|
||||
- `--print-live`\
|
||||
- `--print-live`
|
||||
|
||||
This operation prints on standard output the set of “live” store
|
||||
paths, which are all the store paths reachable from the roots. Live
|
||||
paths should never be deleted, since that would break consistency —
|
||||
it would become possible that applications are installed that
|
||||
reference things that are no longer present in the store.
|
||||
|
||||
- `--print-dead`\
|
||||
- `--print-dead`
|
||||
|
||||
This operation prints out on standard output the set of “dead” store
|
||||
paths, which is just the opposite of the set of live paths: any path
|
||||
in the store that is not live (with respect to the roots) is dead.
|
||||
@ -33,7 +36,8 @@ The following suboperations may be specified:
|
||||
By default, all unreachable paths are deleted. The following options
|
||||
control what gets deleted and in what order:
|
||||
|
||||
- `--max-freed` *bytes*\
|
||||
- `--max-freed` *bytes*
|
||||
|
||||
Keep deleting paths until at least *bytes* bytes have been deleted,
|
||||
then stop. The argument *bytes* can be followed by the
|
||||
multiplicative suffix `K`, `M`, `G` or `T`, denoting KiB, MiB, GiB
|
||||
|
||||
@ -24,25 +24,29 @@ symlink.
|
||||
|
||||
# Common query options
|
||||
|
||||
- `--use-output`; `-u`\
|
||||
- `--use-output` / `-u`
|
||||
|
||||
For each argument to the query that is a [store derivation], apply the
|
||||
query to the output path of the derivation instead.
|
||||
|
||||
- `--force-realise`; `-f`\
|
||||
- `--force-realise` / `-f`
|
||||
|
||||
Realise each argument to the query first (see [`nix-store --realise`](./realise.md)).
|
||||
|
||||
[store derivation]: @docroot@/glossary.md#gloss-store-derivation
|
||||
|
||||
# Queries
|
||||
|
||||
- `--outputs`\
|
||||
- `--outputs`
|
||||
|
||||
Prints out the [output paths] of the store
|
||||
derivations *paths*. These are the paths that will be produced when
|
||||
the derivation is built.
|
||||
|
||||
[output paths]: @docroot@/glossary.md#gloss-output-path
|
||||
|
||||
- `--requisites`; `-R`\
|
||||
- `--requisites` / `-R`
|
||||
|
||||
Prints out the [closure] of the store path *paths*.
|
||||
|
||||
[closure]: @docroot@/glossary.md#gloss-closure
|
||||
@ -61,27 +65,31 @@ symlink.
|
||||
dependencies) is obtained by distributing the closure of a store
|
||||
derivation and specifying the option `--include-outputs`.
|
||||
|
||||
- `--references`\
|
||||
- `--references`
|
||||
|
||||
Prints the set of [references] of the store paths
|
||||
*paths*, that is, their immediate dependencies. (For *all*
|
||||
dependencies, use `--requisites`.)
|
||||
|
||||
[references]: @docroot@/glossary.md#gloss-reference
|
||||
|
||||
- `--referrers`\
|
||||
- `--referrers`
|
||||
|
||||
Prints the set of *referrers* of the store paths *paths*, that is,
|
||||
the store paths currently existing in the Nix store that refer to
|
||||
one of *paths*. Note that contrary to the references, the set of
|
||||
referrers is not constant; it can change as store paths are added or
|
||||
removed.
|
||||
|
||||
- `--referrers-closure`\
|
||||
- `--referrers-closure`
|
||||
|
||||
Prints the closure of the set of store paths *paths* under the
|
||||
referrers relation; that is, all store paths that directly or
|
||||
indirectly refer to one of *paths*. These are all the path currently
|
||||
in the Nix store that are dependent on *paths*.
|
||||
|
||||
- `--deriver`; `-d`\
|
||||
- `--deriver` / `-d`
|
||||
|
||||
Prints the [deriver] that was used to build the store paths *paths*. If
|
||||
the path has no deriver (e.g., if it is a source file), or if the
|
||||
deriver is not known (e.g., in the case of a binary-only
|
||||
@ -92,12 +100,14 @@ symlink.
|
||||
|
||||
[deriver]: @docroot@/glossary.md#gloss-deriver
|
||||
|
||||
- `--valid-derivers`\
|
||||
- `--valid-derivers`
|
||||
|
||||
Prints a set of derivation files (`.drv`) which are supposed produce
|
||||
said paths when realized. Might print nothing, for example for source paths
|
||||
or paths subsituted from a binary cache.
|
||||
|
||||
- `--graph`\
|
||||
- `--graph`
|
||||
|
||||
Prints the references graph of the store paths *paths* in the format
|
||||
of the `dot` tool of AT\&T's [Graphviz
|
||||
package](http://www.graphviz.org/). This can be used to visualise
|
||||
@ -105,39 +115,45 @@ symlink.
|
||||
this to a store derivation. To obtain a runtime dependency graph,
|
||||
apply it to an output path.
|
||||
|
||||
- `--tree`\
|
||||
- `--tree`
|
||||
|
||||
Prints the references graph of the store paths *paths* as a nested
|
||||
ASCII tree. References are ordered by descending closure size; this
|
||||
tends to flatten the tree, making it more readable. The query only
|
||||
recurses into a store path when it is first encountered; this
|
||||
prevents a blowup of the tree representation of the graph.
|
||||
|
||||
- `--graphml`\
|
||||
- `--graphml`
|
||||
|
||||
Prints the references graph of the store paths *paths* in the
|
||||
[GraphML](http://graphml.graphdrawing.org/) file format. This can be
|
||||
used to visualise dependency graphs. To obtain a build-time
|
||||
dependency graph, apply this to a [store derivation]. To obtain a
|
||||
runtime dependency graph, apply it to an output path.
|
||||
|
||||
- `--binding` *name*; `-b` *name*\
|
||||
- `--binding` *name* / `-b` *name*
|
||||
|
||||
Prints the value of the attribute *name* (i.e., environment
|
||||
variable) of the [store derivation]s *paths*. It is an error for a
|
||||
derivation to not have the specified attribute.
|
||||
|
||||
- `--hash`\
|
||||
- `--hash`
|
||||
|
||||
Prints the SHA-256 hash of the contents of the store paths *paths*
|
||||
(that is, the hash of the output of `nix-store --dump` on the given
|
||||
paths). Since the hash is stored in the Nix database, this is a fast
|
||||
operation.
|
||||
|
||||
- `--size`\
|
||||
- `--size`
|
||||
|
||||
Prints the size in bytes of the contents of the store paths *paths*
|
||||
— to be precise, the size of the output of `nix-store --dump` on
|
||||
the given paths. Note that the actual disk space required by the
|
||||
store paths may be higher, especially on filesystems with large
|
||||
cluster sizes.
|
||||
|
||||
- `--roots`\
|
||||
- `--roots`
|
||||
|
||||
Prints the garbage collector roots that point, directly or
|
||||
indirectly, at the store paths *paths*.
|
||||
|
||||
|
||||
@ -42,15 +42,18 @@ For non-derivation arguments, the argument itself is printed.
|
||||
|
||||
# Options
|
||||
|
||||
- `--dry-run`\
|
||||
- `--dry-run`
|
||||
|
||||
Print on standard error a description of what packages would be
|
||||
built or downloaded, without actually performing the operation.
|
||||
|
||||
- `--ignore-unknown`\
|
||||
- `--ignore-unknown`
|
||||
|
||||
If a non-derivation path does not have a substitute, then silently
|
||||
ignore it.
|
||||
|
||||
- `--check`\
|
||||
- `--check`
|
||||
|
||||
This option allows you to check whether a derivation is
|
||||
deterministic. It rebuilds the specified derivation and checks
|
||||
whether the result is bitwise-identical with the existing outputs,
|
||||
|
||||
@ -14,7 +14,8 @@ access to a restricted ssh user.
|
||||
|
||||
The following flags are available:
|
||||
|
||||
- `--write`\
|
||||
- `--write`
|
||||
|
||||
Allow the connected client to request the realization of
|
||||
derivations. In effect, this can be used to make the host act as a
|
||||
remote builder.
|
||||
|
||||
@ -16,14 +16,16 @@ being modified by non-Nix tools, or of bugs in Nix itself.
|
||||
|
||||
This operation has the following options:
|
||||
|
||||
- `--check-contents`\
|
||||
- `--check-contents`
|
||||
|
||||
Checks that the contents of every valid store path has not been
|
||||
altered by computing a SHA-256 hash of the contents and comparing it
|
||||
with the hash stored in the Nix database at build time. Paths that
|
||||
have been modified are printed out. For large stores,
|
||||
`--check-contents` is obviously quite slow.
|
||||
|
||||
- `--repair`\
|
||||
- `--repair`
|
||||
|
||||
If any valid path is missing from the store, or (if
|
||||
`--check-contents` is given) the contents of a valid path has been
|
||||
modified, then try to repair the path by redownloading it. See
|
||||
|
||||
Loading…
Reference in New Issue
Block a user