mirror of
https://github.com/NixOS/nix
synced 2025-07-07 10:11:47 +02:00
Rename doc/manual{src -> source}
This is needed to avoid this https://github.com/mesonbuild/meson/issues/13774 when we go back to making our subproject directory `src`.
This commit is contained in:
John Ericson
parent
d5c45952ac
commit
eb7d7780b1
221 changed files with 75 additions and 74 deletions
26
doc/manual/source/command-ref/files/channels.md
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26
doc/manual/source/command-ref/files/channels.md
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## Channels
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A directory containing symlinks to Nix channels, managed by [`nix-channel`]:
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- `$XDG_STATE_HOME/nix/profiles/channels` for regular users
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- `$NIX_STATE_DIR/profiles/per-user/root/channels` for `root`
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[`nix-channel`] uses a [profile](@docroot@/command-ref/files/profiles.md) to store channels.
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This profile contains symlinks to the contents of those channels.
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## Subscribed channels
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The list of subscribed channels is stored in
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- `~/.nix-channels`
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- `$XDG_STATE_HOME/nix/channels` if [`use-xdg-base-directories`] is set to `true`
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in the following format:
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```
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<url> <name>
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...
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```
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[`nix-channel`]: @docroot@/command-ref/nix-channel.md
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[`use-xdg-base-directories`]: @docroot@/command-ref/conf-file.md#conf-use-xdg-base-directories
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## Default Nix expression
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The source for the [Nix expressions](@docroot@/glossary.md#gloss-nix-expression) used by [`nix-env`] by default:
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- `~/.nix-defexpr`
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- `$XDG_STATE_HOME/nix/defexpr` if [`use-xdg-base-directories`] is set to `true`.
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It is loaded as follows:
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- If the default expression is a file, it is loaded as a Nix expression.
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- If the default expression is a directory containing a `default.nix` file, that `default.nix` file is loaded as a Nix expression.
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- If the default expression is a directory without a `default.nix` file, then its contents (both files and subdirectories) are loaded as Nix expressions.
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The expressions are combined into a single attribute set, each expression under an attribute with the same name as the original file or subdirectory.
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Subdirectories without a `default.nix` file are traversed recursively in search of more Nix expressions, but the names of these intermediate directories are not added to the attribute paths of the default Nix expression.
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Then, the resulting expression is interpreted like this:
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- If the expression is an attribute set, it is used as the default Nix expression.
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- If the expression is a function, an empty set is passed as argument and the return value is used as the default Nix expression.
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> **Example**
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>
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> If the default expression contains two files, `foo.nix` and `bar.nix`, then the default Nix expression will be equivalent to
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>
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> ```nix
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> {
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> foo = import ~/.nix-defexpr/foo.nix;
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> bar = import ~/.nix-defexpr/bar.nix;
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> }
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> ```
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The file [`manifest.nix`](@docroot@/command-ref/files/manifest.nix.md) is always ignored.
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The command [`nix-channel`] places a symlink to the current user's [channels] in this directory, the [user channel link](#user-channel-link).
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This makes all subscribed channels available as attributes in the default expression.
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## User channel link
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A symlink that ensures that [`nix-env`] can find the current user's [channels]:
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- `~/.nix-defexpr/channels`
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- `$XDG_STATE_HOME/defexpr/channels` if [`use-xdg-base-directories`] is set to `true`.
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This symlink points to:
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- `$XDG_STATE_HOME/profiles/channels` for regular users
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- `$NIX_STATE_DIR/profiles/per-user/root/channels` for `root`
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In a multi-user installation, you may also have `~/.nix-defexpr/channels_root`, which links to the channels of the root user.
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[`nix-channel`]: @docroot@/command-ref/nix-channel.md
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[`nix-env`]: @docroot@/command-ref/nix-env.md
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[`use-xdg-base-directories`]: @docroot@/command-ref/conf-file.md#conf-use-xdg-base-directories
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[channels]: @docroot@/command-ref/files/channels.md
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45
doc/manual/source/command-ref/files/manifest.json.md
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45
doc/manual/source/command-ref/files/manifest.json.md
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## `manifest.json`
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The manifest file records the provenance of the packages that are installed in a [profile](./profiles.md) managed by [`nix profile`](@docroot@/command-ref/new-cli/nix3-profile.md) (experimental).
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Here is an example of what the file might look like after installing `zoom-us` from Nixpkgs:
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```json
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{
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"version": 1,
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"elements": [
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{
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"active": true,
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"attrPath": "legacyPackages.x86_64-linux.zoom-us",
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"originalUrl": "flake:nixpkgs",
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"storePaths": [
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"/nix/store/wbhg2ga8f3h87s9h5k0slxk0m81m4cxl-zoom-us-5.3.469451.0927"
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],
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"uri": "github:NixOS/nixpkgs/13d0c311e3ae923a00f734b43fd1d35b47d8943a"
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},
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…
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]
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}
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```
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Each object in the array `elements` denotes an installed package and
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has the following fields:
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* `originalUrl`: The [flake reference](@docroot@/command-ref/new-cli/nix3-flake.md) specified by
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the user at the time of installation (e.g. `nixpkgs`). This is also
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the flake reference that will be used by `nix profile upgrade`.
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* `uri`: The locked flake reference to which `originalUrl` resolved.
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* `attrPath`: The flake output attribute that provided this
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package. Note that this is not necessarily the attribute that the
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user specified, but the one resulting from applying the default
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attribute paths and prefixes; for instance, `hello` might resolve to
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`packages.x86_64-linux.hello` and the empty string to
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`packages.x86_64-linux.default`.
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* `storePath`: The paths in the Nix store containing the package.
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* `active`: Whether the profile contains symlinks to the files of this
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package. If set to false, the package is kept in the Nix store, but
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is not "visible" in the profile's symlink tree.
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128
doc/manual/source/command-ref/files/manifest.nix.md
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128
doc/manual/source/command-ref/files/manifest.nix.md
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## `manifest.nix`
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The manifest file records the provenance of the packages that are installed in a [profile](./profiles.md) managed by [`nix-env`](@docroot@/command-ref/nix-env.md).
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Here is an example of how this file might look like after installing `hello` from Nixpkgs:
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```nix
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[{
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meta = {
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available = true;
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broken = false;
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changelog =
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"https://git.savannah.gnu.org/cgit/hello.git/plain/NEWS?h=v2.12.1";
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description = "A program that produces a familiar, friendly greeting";
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homepage = "https://www.gnu.org/software/hello/manual/";
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insecure = false;
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license = {
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deprecated = false;
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free = true;
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fullName = "GNU General Public License v3.0 or later";
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redistributable = true;
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shortName = "gpl3Plus";
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spdxId = "GPL-3.0-or-later";
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url = "https://spdx.org/licenses/GPL-3.0-or-later.html";
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};
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longDescription = ''
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GNU Hello is a program that prints "Hello, world!" when you run it.
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It is fully customizable.
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'';
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maintainers = [{
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email = "edolstra+nixpkgs@gmail.com";
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github = "edolstra";
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githubId = 1148549;
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name = "Eelco Dolstra";
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}];
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name = "hello-2.12.1";
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outputsToInstall = [ "out" ];
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platforms = [
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"i686-cygwin"
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"x86_64-cygwin"
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"x86_64-darwin"
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"i686-darwin"
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"aarch64-darwin"
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"armv7a-darwin"
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"i686-freebsd13"
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"x86_64-freebsd13"
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"aarch64-genode"
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"i686-genode"
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"x86_64-genode"
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"x86_64-solaris"
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"js-ghcjs"
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"aarch64-linux"
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"armv5tel-linux"
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"armv6l-linux"
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"armv7a-linux"
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"armv7l-linux"
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"i686-linux"
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"m68k-linux"
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"microblaze-linux"
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"microblazeel-linux"
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"mipsel-linux"
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"mips64el-linux"
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"powerpc64-linux"
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"powerpc64le-linux"
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"riscv32-linux"
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"riscv64-linux"
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"s390-linux"
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"s390x-linux"
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"x86_64-linux"
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"mmix-mmixware"
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"aarch64-netbsd"
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"armv6l-netbsd"
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"armv7a-netbsd"
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"armv7l-netbsd"
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"i686-netbsd"
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"m68k-netbsd"
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"mipsel-netbsd"
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"powerpc-netbsd"
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"riscv32-netbsd"
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"riscv64-netbsd"
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"x86_64-netbsd"
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"aarch64_be-none"
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"aarch64-none"
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"arm-none"
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"armv6l-none"
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"avr-none"
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"i686-none"
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"microblaze-none"
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"microblazeel-none"
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"msp430-none"
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"or1k-none"
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"m68k-none"
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"powerpc-none"
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"powerpcle-none"
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"riscv32-none"
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"riscv64-none"
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"rx-none"
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"s390-none"
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"s390x-none"
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"vc4-none"
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"x86_64-none"
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"i686-openbsd"
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"x86_64-openbsd"
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"x86_64-redox"
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"wasm64-wasi"
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"wasm32-wasi"
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"x86_64-windows"
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"i686-windows"
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];
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position =
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"/nix/store/7niq32w715567hbph0q13m5lqna64c1s-nixos-unstable.tar.gz/nixos-unstable.tar.gz/pkgs/applications/misc/hello/default.nix:34";
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unfree = false;
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unsupported = false;
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};
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name = "hello-2.12.1";
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out = {
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outPath = "/nix/store/260q5867crm1xjs4khgqpl6vr9kywql1-hello-2.12.1";
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};
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outPath = "/nix/store/260q5867crm1xjs4khgqpl6vr9kywql1-hello-2.12.1";
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outputs = [ "out" ];
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system = "x86_64-linux";
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type = "derivation";
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}]
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```
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Each element in this list corresponds to an installed package.
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It incorporates some attributes of the original derivation, including `meta`, `name`, `out`, `outPath`, `outputs`, `system`.
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This information is used by Nix for querying and updating the package.
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74
doc/manual/source/command-ref/files/profiles.md
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74
doc/manual/source/command-ref/files/profiles.md
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## Profiles
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A directory that contains links to profiles managed by [`nix-env`] and [`nix profile`]:
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- `$XDG_STATE_HOME/nix/profiles` for regular users
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- `$NIX_STATE_DIR/profiles/per-user/root` if the user is `root`
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A profile is a directory of symlinks to files in the Nix store.
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### Filesystem layout
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Profiles are versioned as follows. When using a profile named *path*, *path* is a symlink to *path*`-`*N*`-link`, where *N* is the version of the profile.
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In turn, *path*`-`*N*`-link` is a symlink to a path in the Nix store.
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For example:
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```console
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$ ls -l ~alice/.local/state/nix/profiles/profile*
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lrwxrwxrwx 1 alice users 14 Nov 25 14:35 /home/alice/.local/state/nix/profiles/profile -> profile-7-link
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lrwxrwxrwx 1 alice users 51 Oct 28 16:18 /home/alice/.local/state/nix/profiles/profile-5-link -> /nix/store/q69xad13ghpf7ir87h0b2gd28lafjj1j-profile
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lrwxrwxrwx 1 alice users 51 Oct 29 13:20 /home/alice/.local/state/nix/profiles/profile-6-link -> /nix/store/6bvhpysd7vwz7k3b0pndn7ifi5xr32dg-profile
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lrwxrwxrwx 1 alice users 51 Nov 25 14:35 /home/alice/.local/state/nix/profiles/profile-7-link -> /nix/store/mp0x6xnsg0b8qhswy6riqvimai4gm677-profile
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```
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Each of these symlinks is a root for the Nix garbage collector.
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The contents of the store path corresponding to each version of the
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profile is a tree of symlinks to the files of the installed packages,
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e.g.
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```console
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$ ll -R ~eelco/.local/state/nix/profiles/profile-7-link/
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/home/eelco/.local/state/nix/profiles/profile-7-link/:
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total 20
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dr-xr-xr-x 2 root root 4096 Jan 1 1970 bin
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-r--r--r-- 2 root root 1402 Jan 1 1970 manifest.nix
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dr-xr-xr-x 4 root root 4096 Jan 1 1970 share
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/home/eelco/.local/state/nix/profiles/profile-7-link/bin:
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total 20
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lrwxrwxrwx 5 root root 79 Jan 1 1970 chromium -> /nix/store/ijm5k0zqisvkdwjkc77mb9qzb35xfi4m-chromium-86.0.4240.111/bin/chromium
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lrwxrwxrwx 7 root root 87 Jan 1 1970 spotify -> /nix/store/w9182874m1bl56smps3m5zjj36jhp3rn-spotify-1.1.26.501.gbe11e53b-15/bin/spotify
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lrwxrwxrwx 3 root root 79 Jan 1 1970 zoom-us -> /nix/store/wbhg2ga8f3h87s9h5k0slxk0m81m4cxl-zoom-us-5.3.469451.0927/bin/zoom-us
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/home/eelco/.local/state/nix/profiles/profile-7-link/share/applications:
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total 12
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lrwxrwxrwx 4 root root 120 Jan 1 1970 chromium-browser.desktop -> /nix/store/4cf803y4vzfm3gyk3vzhzb2327v0kl8a-chromium-unwrapped-86.0.4240.111/share/applications/chromium-browser.desktop
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lrwxrwxrwx 7 root root 110 Jan 1 1970 spotify.desktop -> /nix/store/w9182874m1bl56smps3m5zjj36jhp3rn-spotify-1.1.26.501.gbe11e53b-15/share/applications/spotify.desktop
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lrwxrwxrwx 3 root root 107 Jan 1 1970 us.zoom.Zoom.desktop -> /nix/store/wbhg2ga8f3h87s9h5k0slxk0m81m4cxl-zoom-us-5.3.469451.0927/share/applications/us.zoom.Zoom.desktop
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…
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```
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Each profile version contains a manifest file:
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- [`manifest.nix`](@docroot@/command-ref/files/manifest.nix.md) used by [`nix-env`](@docroot@/command-ref/nix-env.md).
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- [`manifest.json`](@docroot@/command-ref/files/manifest.json.md) used by [`nix profile`](@docroot@/command-ref/new-cli/nix3-profile.md) (experimental).
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## User profile link
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A symbolic link to the user's current profile:
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- `~/.nix-profile`
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- `$XDG_STATE_HOME/nix/profile` if [`use-xdg-base-directories`] is set to `true`.
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By default, this symlink points to:
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- `$XDG_STATE_HOME/nix/profiles/profile` for regular users
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- `$NIX_STATE_DIR/profiles/per-user/root/profile` for `root`
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The `PATH` environment variable should include `/bin` subdirectory of the profile link (e.g. `~/.nix-profile/bin`) for the user environment to be visible to the user.
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The [installer](@docroot@/installation/installing-binary.md) sets this up by default, unless you enable [`use-xdg-base-directories`].
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[`nix-env`]: @docroot@/command-ref/nix-env.md
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[`nix profile`]: @docroot@/command-ref/new-cli/nix3-profile.md
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[`use-xdg-base-directories`]: @docroot@/command-ref/conf-file.md#conf-use-xdg-base-directories
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Loading…
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