From 7708a34a514ddeb1420886309ae9870d8757f7ce Mon Sep 17 00:00:00 2001 From: Jan Tojnar Date: Wed, 25 May 2022 12:36:46 +0200 Subject: [PATCH] doc: Add anchors to long lists MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Added using the following sed scripts: - For command-ref/opt-common.md: s~- `(--?)([^`]+)`~- [`\1\2`]{#opt-\2}~g - For expressions/builtin-constants.md: s~- `(builtins\.?)([^`]+)`~- [`\1\2`]{#builtins-\2}~g - For expressions/advanced-attributes.md s~^ - `([^`]+)`~ - [`\1`]{#adv-attr-\1}~g and manually adjusted outputHashAlgo & outputHashMode. - For glossary.md s~^ - (`([^`]+)`|(.+)) ?\\~ - [\1]{#gloss-\2\3}\\~g; s~(gloss-\w+) ~\1-~g and manually adjusted anchors for Nix expression, user environment, NAR, ∅ and ε. - For command-ref/env-common.md s~^ - `([^`]+)`~ - [`\1`]{#env-\1}~g' --- doc/manual/src/command-ref/env-common.md | 30 ++++++------- doc/manual/src/command-ref/nix-build.md | 6 +-- doc/manual/src/command-ref/opt-common.md | 42 +++++++++---------- .../src/expressions/advanced-attributes.md | 22 +++++----- .../src/expressions/builtin-constants.md | 2 +- doc/manual/src/glossary.md | 36 ++++++++-------- 6 files changed, 69 insertions(+), 69 deletions(-) diff --git a/doc/manual/src/command-ref/env-common.md b/doc/manual/src/command-ref/env-common.md index 6e2403461..ab048074a 100644 --- a/doc/manual/src/command-ref/env-common.md +++ b/doc/manual/src/command-ref/env-common.md @@ -2,11 +2,11 @@ Most Nix commands interpret the following environment variables: - - `IN_NIX_SHELL`\ + - [`IN_NIX_SHELL`]{#env-IN_NIX_SHELL}\ Indicator that tells if the current environment was set up by `nix-shell`. Since Nix 2.0 the values are `"pure"` and `"impure"` - - `NIX_PATH`\ + - [`NIX_PATH`]{#env-NIX_PATH}\ A colon-separated list of directories used to look up Nix expressions enclosed in angle brackets (i.e., ``). For instance, the value @@ -44,7 +44,7 @@ Most Nix commands interpret the following environment variables: The Nix search path can also be extended using the `-I` option to many Nix commands, which takes precedence over `NIX_PATH`. - - `NIX_IGNORE_SYMLINK_STORE`\ + - [`NIX_IGNORE_SYMLINK_STORE`]{#env-NIX_IGNORE_SYMLINK_STORE}\ Normally, the Nix store directory (typically `/nix/store`) is not allowed to contain any symlink components. This is to prevent “impure” builds. Builders sometimes “canonicalise” paths by @@ -66,41 +66,41 @@ Most Nix commands interpret the following environment variables: Consult the mount 8 manual page for details. - - `NIX_STORE_DIR`\ + - [`NIX_STORE_DIR`]{#env-NIX_STORE_DIR}\ Overrides the location of the Nix store (default `prefix/store`). - - `NIX_DATA_DIR`\ + - [`NIX_DATA_DIR`]{#env-NIX_DATA_DIR}\ Overrides the location of the Nix static data directory (default `prefix/share`). - - `NIX_LOG_DIR`\ + - [`NIX_LOG_DIR`]{#env-NIX_LOG_DIR}\ Overrides the location of the Nix log directory (default `prefix/var/log/nix`). - - `NIX_STATE_DIR`\ + - [`NIX_STATE_DIR`]{#env-NIX_STATE_DIR}\ Overrides the location of the Nix state directory (default `prefix/var/nix`). - - `NIX_CONF_DIR`\ + - [`NIX_CONF_DIR`]{#env-NIX_CONF_DIR}\ Overrides the location of the system Nix configuration directory (default `prefix/etc/nix`). - - `NIX_CONFIG`\ + - [`NIX_CONFIG`]{#env-NIX_CONFIG}\ Applies settings from Nix configuration from the environment. The content is treated as if it was read from a Nix configuration file. Settings are separated by the newline character. - - `NIX_USER_CONF_FILES`\ + - [`NIX_USER_CONF_FILES`]{#env-NIX_USER_CONF_FILES}\ Overrides the location of the user Nix configuration files to load from (defaults to the XDG spec locations). The variable is treated as a list separated by the `:` token. - - `TMPDIR`\ + - [`TMPDIR`]{#env-TMPDIR}\ Use the specified directory to store temporary files. In particular, this includes temporary build directories; these can take up substantial amounts of disk space. The default is `/tmp`. - - `NIX_REMOTE`\ + - [`NIX_REMOTE`]{#env-NIX_REMOTE}\ This variable should be set to `daemon` if you want to use the Nix daemon to execute Nix operations. This is necessary in [multi-user Nix installations](../installation/multi-user.md). If the Nix @@ -108,16 +108,16 @@ Most Nix commands interpret the following environment variables: should be set to `unix://path/to/socket`. Otherwise, it should be left unset. - - `NIX_SHOW_STATS`\ + - [`NIX_SHOW_STATS`]{#env-NIX_SHOW_STATS}\ If set to `1`, Nix will print some evaluation statistics, such as the number of values allocated. - - `NIX_COUNT_CALLS`\ + - [`NIX_COUNT_CALLS`]{#env-NIX_COUNT_CALLS}\ If set to `1`, Nix will print how often functions were called during Nix expression evaluation. This is useful for profiling your Nix expressions. - - `GC_INITIAL_HEAP_SIZE`\ + - [`GC_INITIAL_HEAP_SIZE`]{#env-GC_INITIAL_HEAP_SIZE}\ If Nix has been configured to use the Boehm garbage collector, this variable sets the initial size of the heap in bytes. It defaults to 384 MiB. Setting it to a low value reduces memory consumption, but diff --git a/doc/manual/src/command-ref/nix-build.md b/doc/manual/src/command-ref/nix-build.md index 43de7a6e6..aacb32a25 100644 --- a/doc/manual/src/command-ref/nix-build.md +++ b/doc/manual/src/command-ref/nix-build.md @@ -47,16 +47,16 @@ All options not listed here are passed to `nix-store --realise`, except for `--arg` and `--attr` / `-A` which are passed to `nix-instantiate`. - - `--no-out-link`\ + - [`--no-out-link`]{#opt-no-out-link}\ Do not create a symlink to the output path. Note that as a result the output does not become a root of the garbage collector, and so might be deleted by `nix-store --gc`. - - `--dry-run`\ + - [`--dry-run`]{#opt-dry-run}\ Show what store paths would be built or downloaded. - - `--out-link` / `-o` *outlink*\ + - [`--out-link`]{#opt-out-link} / `-o` *outlink*\ Change the name of the symlink to the output path created from `result` to *outlink*. diff --git a/doc/manual/src/command-ref/opt-common.md b/doc/manual/src/command-ref/opt-common.md index 7ee1a26bc..51d7de18a 100644 --- a/doc/manual/src/command-ref/opt-common.md +++ b/doc/manual/src/command-ref/opt-common.md @@ -2,13 +2,13 @@ Most Nix commands accept the following command-line options: - - `--help`\ + - [`--help`]{#opt-help}\ Prints out a summary of the command syntax and exits. - - `--version`\ + - [`--version`]{#opt-version}\ Prints out the Nix version number on standard output and exits. - - `--verbose` / `-v`\ + - [`--verbose`]{#opt-verbose} / `-v`\ Increases the level of verbosity of diagnostic messages printed on standard error. For each Nix operation, the information printed on standard output is well-defined; any diagnostic information is @@ -37,14 +37,14 @@ Most Nix commands accept the following command-line options: - 5\ “Vomit”: print vast amounts of debug information. - - `--quiet`\ + - [`--quiet`]{#opt-quiet}\ Decreases the level of verbosity of diagnostic messages printed on standard error. This is the inverse option to `-v` / `--verbose`. This option may be specified repeatedly. See the previous verbosity levels list. - - `--log-format` *format*\ + - [`--log-format`]{#opt-log-format} *format*\ This option can be used to change the output of the log format, with *format* being one of: @@ -66,14 +66,14 @@ Most Nix commands accept the following command-line options: - bar-with-logs\ Display the raw logs, with the progress bar at the bottom. - - `--no-build-output` / `-Q`\ + - [`--no-build-output`]{#opt-no-build-output} / `-Q`\ By default, output written by builders to standard output and standard error is echoed to the Nix command's standard error. This option suppresses this behaviour. Note that the builder's standard output and error are always written to a log file in `prefix/nix/var/log/nix`. - - `--max-jobs` / `-j` *number*\ + - [`--max-jobs`]{#opt-max-jobs} / `-j` *number*\ Sets the maximum number of build jobs that Nix will perform in parallel to the specified number. Specify `auto` to use the number of CPUs in the system. The default is specified by the `max-jobs` @@ -83,7 +83,7 @@ Most Nix commands accept the following command-line options: Setting it to `0` disallows building on the local machine, which is useful when you want builds to happen only on remote builders. - - `--cores`\ + - [`--cores`]{#opt-cores}\ Sets the value of the `NIX_BUILD_CORES` environment variable in the invocation of builders. Builders can use this variable at their discretion to control the maximum amount of parallelism. For @@ -94,18 +94,18 @@ Most Nix commands accept the following command-line options: means that the builder should use all available CPU cores in the system. - - `--max-silent-time`\ + - [`--max-silent-time`]{#opt-max-silent-time}\ Sets the maximum number of seconds that a builder can go without producing any data on standard output or standard error. The default is specified by the `max-silent-time` configuration setting. `0` means no time-out. - - `--timeout`\ + - [`--timeout`]{#opt-timeout}\ Sets the maximum number of seconds that a builder can run. The default is specified by the `timeout` configuration setting. `0` means no timeout. - - `--keep-going` / `-k`\ + - [`--keep-going`]{#opt-keep-going} / `-k`\ Keep going in case of failed builds, to the greatest extent possible. That is, if building an input of some derivation fails, Nix will still build the other inputs, but not the derivation @@ -113,13 +113,13 @@ Most Nix commands accept the following command-line options: for builds of substitutes), possibly killing builds in progress (in case of parallel or distributed builds). - - `--keep-failed` / `-K`\ + - [`--keep-failed`]{#opt-keep-failed} / `-K`\ Specifies that in case of a build failure, the temporary directory (usually in `/tmp`) in which the build takes place should not be deleted. The path of the build directory is printed as an informational message. - - `--fallback`\ + - [`--fallback`]{#opt-fallback}\ Whenever Nix attempts to build a derivation for which substitutes are known for each output path, but realising the output paths through the substitutes fails, fall back on building the derivation. @@ -134,12 +134,12 @@ Most Nix commands accept the following command-line options: failure in obtaining the substitutes to lead to a full build from source (with the related consumption of resources). - - `--readonly-mode`\ + - [`--readonly-mode`]{#opt-readonly-mode}\ When this option is used, no attempt is made to open the Nix database. Most Nix operations do need database access, so those operations will fail. - - `--arg` *name* *value*\ + - [`--arg`]{#opt-arg} *name* *value*\ This option is accepted by `nix-env`, `nix-instantiate`, `nix-shell` and `nix-build`. When evaluating Nix expressions, the expression evaluator will automatically try to call functions that @@ -170,13 +170,13 @@ Most Nix commands accept the following command-line options: since the argument is a Nix string literal, you have to escape the quotes.) - - `--argstr` *name* *value*\ + - [`--argstr`]{#opt-argstr} *name* *value*\ This option is like `--arg`, only the value is not a Nix expression but a string. So instead of `--arg system \"i686-linux\"` (the outer quotes are to keep the shell happy) you can say `--argstr system i686-linux`. - - `--attr` / `-A` *attrPath*\ + - [`--attr`]{#opt-attr} / `-A` *attrPath*\ Select an attribute from the top-level Nix expression being evaluated. (`nix-env`, `nix-instantiate`, `nix-build` and `nix-shell` only.) The *attribute path* *attrPath* is a sequence @@ -191,7 +191,7 @@ Most Nix commands accept the following command-line options: attribute of the fourth element of the array in the `foo` attribute of the top-level expression. - - `--expr` / `-E`\ + - [`--expr`]{#opt-expr} / `-E`\ Interpret the command line arguments as a list of Nix expressions to be parsed and evaluated, rather than as a list of file names of Nix expressions. (`nix-instantiate`, `nix-build` and `nix-shell` only.) @@ -202,17 +202,17 @@ Most Nix commands accept the following command-line options: use, give your expression to the `nix-shell -p` convenience flag instead. - - `-I` *path*\ + - [`-I`]{#opt-I} *path*\ Add a path to the Nix expression search path. This option may be given multiple times. See the `NIX_PATH` environment variable for information on the semantics of the Nix search path. Paths added through `-I` take precedence over `NIX_PATH`. - - `--option` *name* *value*\ + - [`--option`]{#opt-option} *name* *value*\ Set the Nix configuration option *name* to *value*. This overrides settings in the Nix configuration file (see nix.conf5). - - `--repair`\ + - [`--repair`]{#opt-repair}\ Fix corrupted or missing store paths by redownloading or rebuilding them. Note that this is slow because it requires computing a cryptographic hash of the contents of every path in the closure of diff --git a/doc/manual/src/expressions/advanced-attributes.md b/doc/manual/src/expressions/advanced-attributes.md index 000595815..2e7e80ed0 100644 --- a/doc/manual/src/expressions/advanced-attributes.md +++ b/doc/manual/src/expressions/advanced-attributes.md @@ -2,7 +2,7 @@ Derivations can declare some infrequently used optional attributes. - - `allowedReferences`\ + - [`allowedReferences`]{#adv-attr-allowedReferences}\ The optional attribute `allowedReferences` specifies a list of legal references (dependencies) of the output of the builder. For example, @@ -17,7 +17,7 @@ Derivations can declare some infrequently used optional attributes. booting Linux don’t have accidental dependencies on other paths in the Nix store. - - `allowedRequisites`\ + - [`allowedRequisites`]{#adv-attr-allowedRequisites}\ This attribute is similar to `allowedReferences`, but it specifies the legal requisites of the whole closure, so all the dependencies recursively. For example, @@ -30,7 +30,7 @@ Derivations can declare some infrequently used optional attributes. runtime dependency than `foobar`, and in addition it enforces that `foobar` itself doesn't introduce any other dependency itself. - - `disallowedReferences`\ + - [`disallowedReferences`]{#adv-attr-disallowedReferences}\ The optional attribute `disallowedReferences` specifies a list of illegal references (dependencies) of the output of the builder. For example, @@ -42,7 +42,7 @@ Derivations can declare some infrequently used optional attributes. enforces that the output of a derivation cannot have a direct runtime dependencies on the derivation `foo`. - - `disallowedRequisites`\ + - [`disallowedRequisites`]{#adv-attr-disallowedRequisites}\ This attribute is similar to `disallowedReferences`, but it specifies illegal requisites for the whole closure, so all the dependencies recursively. For example, @@ -55,7 +55,7 @@ Derivations can declare some infrequently used optional attributes. dependency on `foobar` or any other derivation depending recursively on `foobar`. - - `exportReferencesGraph`\ + - [`exportReferencesGraph`]{#adv-attr-exportReferencesGraph}\ This attribute allows builders access to the references graph of their inputs. The attribute is a list of inputs in the Nix store whose references graph the builder needs to know. The value of @@ -84,7 +84,7 @@ Derivations can declare some infrequently used optional attributes. with a Nix store containing the closure of a bootable NixOS configuration). - - `impureEnvVars`\ + - [`impureEnvVars`]{#adv-attr-impureEnvVars}\ This attribute allows you to specify a list of environment variables that should be passed from the environment of the calling user to the builder. Usually, the environment is cleared completely when the @@ -112,7 +112,7 @@ Derivations can declare some infrequently used optional attributes. > environmental variables come from the environment of the > `nix-build`. - - `outputHash`; `outputHashAlgo`; `outputHashMode`\ + - [`outputHash`]{#adv-attr-outputHash}; [`outputHashAlgo`]{#adv-attr-outputHashAlgo}; [`outputHashMode`]{#adv-attr-outputHashMode}\ These attributes declare that the derivation is a so-called *fixed-output derivation*, which means that a cryptographic hash of the output is already known in advance. When the build of a @@ -208,7 +208,7 @@ Derivations can declare some infrequently used optional attributes. [`nix-hash` command](../command-ref/nix-hash.md) for information about converting to and from base-32 notation.) - - `__contentAddressed` + - [`__contentAddressed`]{#adv-attr-__contentAddressed} If this **experimental** attribute is set to true, then the derivation outputs will be stored in a content-addressed location rather than the traditional input-addressed one. @@ -216,7 +216,7 @@ Derivations can declare some infrequently used optional attributes. Setting this attribute also requires setting `outputHashMode` and `outputHashAlgo` like for *fixed-output derivations* (see above). - - `passAsFile`\ + - [`passAsFile`]{#adv-attr-passAsFile}\ A list of names of attributes that should be passed via files rather than environment variables. For example, if you have @@ -234,7 +234,7 @@ Derivations can declare some infrequently used optional attributes. builder, since most operating systems impose a limit on the size of the environment (typically, a few hundred kilobyte). - - `preferLocalBuild`\ + - [`preferLocalBuild`]{#adv-attr-preferLocalBuild}\ If this attribute is set to `true` and [distributed building is enabled](../advanced-topics/distributed-builds.md), then, if possible, the derivation will be built locally instead of forwarded @@ -242,7 +242,7 @@ Derivations can declare some infrequently used optional attributes. where the cost of doing a download or remote build would exceed the cost of building locally. - - `allowSubstitutes`\ + - [`allowSubstitutes`]{#adv-attr-allowSubstitutes}\ If this attribute is set to `false`, then Nix will always build this derivation; it will not try to substitute its outputs. This is useful for very trivial derivations (such as `writeText` in Nixpkgs) diff --git a/doc/manual/src/expressions/builtin-constants.md b/doc/manual/src/expressions/builtin-constants.md index 1404289e5..78d066a82 100644 --- a/doc/manual/src/expressions/builtin-constants.md +++ b/doc/manual/src/expressions/builtin-constants.md @@ -14,7 +14,7 @@ Here are the constants built into the Nix expression evaluator: This allows a Nix expression to fall back gracefully on older Nix installations that don’t have the desired built-in function. - - `builtins.currentSystem`\ + - [`builtins.currentSystem`]{#builtins-currentSystem}\ The built-in value `currentSystem` evaluates to the Nix platform identifier for the Nix installation on which the expression is being evaluated, such as `"i686-linux"` or `"x86_64-darwin"`. diff --git a/doc/manual/src/glossary.md b/doc/manual/src/glossary.md index 71ff13275..3448b971b 100644 --- a/doc/manual/src/glossary.md +++ b/doc/manual/src/glossary.md @@ -1,48 +1,48 @@ # Glossary - - derivation\ + - [derivation]{#gloss-derivation}\ A description of a build action. The result of a derivation is a store object. Derivations are typically specified in Nix expressions using the [`derivation` primitive](expressions/derivations.md). These are translated into low-level *store derivations* (implicitly by `nix-env` and `nix-build`, or explicitly by `nix-instantiate`). - - store\ + - [store]{#gloss-store}\ The location in the file system where store objects live. Typically `/nix/store`. - - store path\ + - [store path]{#gloss-store-path}\ The location in the file system of a store object, i.e., an immediate child of the Nix store directory. - - store object\ + - [store object]{#gloss-store-object}\ A file that is an immediate child of the Nix store directory. These can be regular files, but also entire directory trees. Store objects can be sources (objects copied from outside of the store), derivation outputs (objects produced by running a build action), or derivations (files describing a build action). - - substitute\ + - [substitute]{#gloss-substitute}\ A substitute is a command invocation stored in the Nix database that describes how to build a store object, bypassing the normal build mechanism (i.e., derivations). Typically, the substitute builds the store object by downloading a pre-built version of the store object from some server. - - purity\ + - [purity]{#gloss-purity}\ The assumption that equal Nix derivations when run always produce the same output. This cannot be guaranteed in general (e.g., a builder can rely on external inputs such as the network or the system time) but the Nix model assumes it. - - Nix expression\ + - [Nix expression]{#gloss-nix-expression}\ A high-level description of software packages and compositions thereof. Deploying software using Nix entails writing Nix expressions for your packages. Nix expressions are translated to derivations that are stored in the Nix store. These derivations can then be built. - - reference\ + - [reference]{#gloss-reference}\ A store path `P` is said to have a reference to a store path `Q` if the store object at `P` contains the path `Q` somewhere. The *references* of a store path are the set of store paths to which it @@ -52,11 +52,11 @@ output paths), whereas an output path only references other output paths. - - reachable\ + - [reachable]{#gloss-reachable}\ A store path `Q` is reachable from another store path `P` if `Q` is in the *closure* of the *references* relation. - - closure\ + - [closure]{#gloss-closure}\ The closure of a store path is the set of store paths that are directly or indirectly “reachable” from that store path; that is, it’s the closure of the path under the *references* relation. For @@ -71,34 +71,34 @@ to path `Q`, then `Q` is in the closure of `P`. Further, if `Q` references `R` then `R` is also in the closure of `P`. - - output path\ + - [output path]{#gloss-output-path}\ A store path produced by a derivation. - - deriver\ + - [deriver]{#gloss-deriver}\ The deriver of an *output path* is the store derivation that built it. - - validity\ + - [validity]{#gloss-validity}\ A store path is considered *valid* if it exists in the file system, is listed in the Nix database as being valid, and if all paths in its closure are also valid. - - user environment\ + - [user environment]{#gloss-user-env}\ An automatically generated store object that consists of a set of symlinks to “active” applications, i.e., other store paths. These are generated automatically by [`nix-env`](command-ref/nix-env.md). See *profiles*. - - profile\ + - [profile]{#gloss-profile}\ A symlink to the current *user environment* of a user, e.g., `/nix/var/nix/profiles/default`. - - NAR\ + - [NAR]{#gloss-nar}\ A *N*ix *AR*chive. This is a serialisation of a path in the Nix store. It can contain regular files, directories and symbolic links. NARs are generated and unpacked using `nix-store --dump` and `nix-store --restore`. - - `∅` \ + - [`∅`]{#gloss-emtpy-set}\ The empty set symbol. In the context of profile history, this denotes a package is not present in a particular version of the profile. - - `ε` \ + - [`ε`]{#gloss-epsilon}\ The epsilon symbol. In the context of a package, this means the version is empty. More precisely, the derivation does not have a version attribute.