mirror of
https://github.com/NixOS/nixpkgs.git
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1052 lines
32 KiB
Nix
1052 lines
32 KiB
Nix
/**
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<!-- This anchor is here for backwards compatibility -->
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[]{#sec-fileset}
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The [`lib.fileset`](#sec-functions-library-fileset) library allows you to work with _file sets_.
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A file set is a (mathematical) set of local files that can be added to the Nix store for use in Nix derivations.
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File sets are easy and safe to use, providing obvious and composable semantics with good error messages to prevent mistakes.
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||
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# Overview {#sec-fileset-overview}
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Basics:
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- [Implicit coercion from paths to file sets](#sec-fileset-path-coercion)
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- [`lib.fileset.maybeMissing`](#function-library-lib.fileset.maybeMissing):
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Create a file set from a path that may be missing.
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- [`lib.fileset.trace`](#function-library-lib.fileset.trace)/[`lib.fileset.traceVal`](#function-library-lib.fileset.trace):
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Pretty-print file sets for debugging.
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||
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- [`lib.fileset.toSource`](#function-library-lib.fileset.toSource):
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Add files in file sets to the store to use as derivation sources.
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- [`lib.fileset.toList`](#function-library-lib.fileset.toList):
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The list of files contained in a file set.
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||
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Combinators:
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- [`lib.fileset.union`](#function-library-lib.fileset.union)/[`lib.fileset.unions`](#function-library-lib.fileset.unions):
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Create a larger file set from all the files in multiple file sets.
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- [`lib.fileset.intersection`](#function-library-lib.fileset.intersection):
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Create a smaller file set from only the files in both file sets.
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- [`lib.fileset.difference`](#function-library-lib.fileset.difference):
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Create a smaller file set containing all files that are in one file set, but not another one.
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Filtering:
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- [`lib.fileset.fileFilter`](#function-library-lib.fileset.fileFilter):
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Create a file set from all files that satisisfy a predicate in a directory.
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Utilities:
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- [`lib.fileset.fromSource`](#function-library-lib.fileset.fromSource):
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Create a file set from a `lib.sources`-based value.
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- [`lib.fileset.gitTracked`](#function-library-lib.fileset.gitTracked)/[`lib.fileset.gitTrackedWith`](#function-library-lib.fileset.gitTrackedWith):
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Create a file set from all tracked files in a local Git repository.
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If you need more file set functions,
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see [this issue](https://github.com/NixOS/nixpkgs/issues/266356) to request it.
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# Implicit coercion from paths to file sets {#sec-fileset-path-coercion}
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All functions accepting file sets as arguments can also accept [paths](https://nixos.org/manual/nix/stable/language/values.html#type-path) as arguments.
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Such path arguments are implicitly coerced to file sets containing all files under that path:
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- A path to a file turns into a file set containing that single file.
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- A path to a directory turns into a file set containing all files _recursively_ in that directory.
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If the path points to a non-existent location, an error is thrown.
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::: {.note}
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Just like in Git, file sets cannot represent empty directories.
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Because of this, a path to a directory that contains no files (recursively) will turn into a file set containing no files.
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:::
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:::{.note}
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File set coercion does _not_ add any of the files under the coerced paths to the store.
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Only the [`toSource`](#function-library-lib.fileset.toSource) function adds files to the Nix store, and only those files contained in the `fileset` argument.
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This is in contrast to using [paths in string interpolation](https://nixos.org/manual/nix/stable/language/values.html#type-path), which does add the entire referenced path to the store.
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:::
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## Example {#sec-fileset-path-coercion-example}
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Assume we are in a local directory with a file hierarchy like this:
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```
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├─ a/
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│ ├─ x (file)
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│ └─ b/
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│ └─ y (file)
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└─ c/
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└─ d/
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```
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Here's a listing of which files get included when different path expressions get coerced to file sets:
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- `./.` as a file set contains both `a/x` and `a/b/y` (`c/` does not contain any files and is therefore omitted).
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- `./a` as a file set contains both `a/x` and `a/b/y`.
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- `./a/x` as a file set contains only `a/x`.
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- `./a/b` as a file set contains only `a/b/y`.
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- `./c` as a file set is empty, since neither `c` nor `c/d` contain any files.
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*/
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{ lib }:
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let
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inherit (import ./internal.nix { inherit lib; })
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_coerce
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_singleton
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_coerceMany
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_toSourceFilter
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_fromSourceFilter
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_toList
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_unionMany
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_fileFilter
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_printFileset
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_intersection
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_difference
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_fromFetchGit
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_fetchGitSubmodulesMinver
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_emptyWithoutBase
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;
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inherit (builtins)
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isBool
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isList
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isPath
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pathExists
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seq
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typeOf
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nixVersion
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;
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inherit (lib.lists)
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elemAt
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imap0
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;
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inherit (lib.path)
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hasPrefix
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splitRoot
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;
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inherit (lib.strings)
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isStringLike
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versionOlder
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;
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inherit (lib.filesystem)
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pathType
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;
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inherit (lib.sources)
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cleanSourceWith
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;
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inherit (lib.trivial)
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isFunction
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pipe
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;
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in {
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/**
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Create a file set from a path that may or may not exist:
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- If the path does exist, the path is [coerced to a file set](#sec-fileset-path-coercion).
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- If the path does not exist, a file set containing no files is returned.
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# Inputs
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`path`
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: 1\. Function argument
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# Type
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```
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maybeMissing :: Path -> FileSet
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```
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# Examples
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:::{.example}
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## `lib.fileset.maybeMissing` usage example
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```nix
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# All files in the current directory, but excluding main.o if it exists
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difference ./. (maybeMissing ./main.o)
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```
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:::
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*/
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maybeMissing =
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path:
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if ! isPath path then
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if isStringLike path then
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throw ''
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lib.fileset.maybeMissing: Argument ("${toString path}") is a string-like value, but it should be a path instead.''
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else
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throw ''
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lib.fileset.maybeMissing: Argument is of type ${typeOf path}, but it should be a path instead.''
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else if ! pathExists path then
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_emptyWithoutBase
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else
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_singleton path;
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/**
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Incrementally evaluate and trace a file set in a pretty way.
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This function is only intended for debugging purposes.
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The exact tracing format is unspecified and may change.
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This function takes a final argument to return.
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In comparison, [`traceVal`](#function-library-lib.fileset.traceVal) returns
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the given file set argument.
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This variant is useful for tracing file sets in the Nix repl.
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# Inputs
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`fileset`
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: The file set to trace.
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This argument can also be a path,
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which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
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`val`
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: The value to return.
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# Type
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```
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trace :: FileSet -> Any -> Any
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```
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# Examples
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:::{.example}
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## `lib.fileset.trace` usage example
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```nix
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trace (unions [ ./Makefile ./src ./tests/run.sh ]) null
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=>
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trace: /home/user/src/myProject
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trace: - Makefile (regular)
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trace: - src (all files in directory)
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trace: - tests
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trace: - run.sh (regular)
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null
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```
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:::
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*/
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trace = fileset:
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let
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# "fileset" would be a better name, but that would clash with the argument name,
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# and we cannot change that because of https://github.com/nix-community/nixdoc/issues/76
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actualFileset = _coerce "lib.fileset.trace: Argument" fileset;
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in
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seq
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(_printFileset actualFileset)
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(x: x);
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/**
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Incrementally evaluate and trace a file set in a pretty way.
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This function is only intended for debugging purposes.
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The exact tracing format is unspecified and may change.
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This function returns the given file set.
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In comparison, [`trace`](#function-library-lib.fileset.trace) takes another argument to return.
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This variant is useful for tracing file sets passed as arguments to other functions.
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# Inputs
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`fileset`
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: The file set to trace and return.
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This argument can also be a path,
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which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
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# Type
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||
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```
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traceVal :: FileSet -> FileSet
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```
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# Examples
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:::{.example}
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## `lib.fileset.traceVal` usage example
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```nix
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toSource {
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root = ./.;
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fileset = traceVal (unions [
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./Makefile
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./src
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./tests/run.sh
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]);
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}
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=>
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trace: /home/user/src/myProject
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trace: - Makefile (regular)
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trace: - src (all files in directory)
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trace: - tests
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trace: - run.sh (regular)
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"/nix/store/...-source"
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```
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:::
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*/
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traceVal = fileset:
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let
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# "fileset" would be a better name, but that would clash with the argument name,
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# and we cannot change that because of https://github.com/nix-community/nixdoc/issues/76
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actualFileset = _coerce "lib.fileset.traceVal: Argument" fileset;
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in
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seq
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(_printFileset actualFileset)
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# We could also return the original fileset argument here,
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# but that would then duplicate work for consumers of the fileset, because then they have to coerce it again
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actualFileset;
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/**
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Add the local files contained in `fileset` to the store as a single [store path](https://nixos.org/manual/nix/stable/glossary#gloss-store-path) rooted at `root`.
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The result is the store path as a string-like value, making it usable e.g. as the `src` of a derivation, or in string interpolation:
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```nix
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stdenv.mkDerivation {
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src = lib.fileset.toSource { ... };
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# ...
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||
}
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||
```
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||
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||
The name of the store path is always `source`.
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||
|
||
# Inputs
|
||
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||
Takes an attribute set with the following attributes
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||
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`root` (Path; _required_)
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: The local directory [path](https://nixos.org/manual/nix/stable/language/values.html#type-path) that will correspond to the root of the resulting store path.
|
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Paths in [strings](https://nixos.org/manual/nix/stable/language/values.html#type-string), including Nix store paths, cannot be passed as `root`.
|
||
`root` has to be a directory.
|
||
|
||
:::{.note}
|
||
Changing `root` only affects the directory structure of the resulting store path, it does not change which files are added to the store.
|
||
The only way to change which files get added to the store is by changing the `fileset` attribute.
|
||
:::
|
||
|
||
`fileset` (FileSet; _required_)
|
||
|
||
: The file set whose files to import into the store.
|
||
File sets can be created using other functions in this library.
|
||
This argument can also be a path,
|
||
which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
|
||
|
||
:::{.note}
|
||
If a directory does not recursively contain any file, it is omitted from the store path contents.
|
||
:::
|
||
|
||
# Type
|
||
|
||
```
|
||
toSource :: {
|
||
root :: Path,
|
||
fileset :: FileSet,
|
||
} -> SourceLike
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.toSource` usage example
|
||
|
||
```nix
|
||
# Import the current directory into the store
|
||
# but only include files under ./src
|
||
toSource {
|
||
root = ./.;
|
||
fileset = ./src;
|
||
}
|
||
=> "/nix/store/...-source"
|
||
|
||
# Import the current directory into the store
|
||
# but only include ./Makefile and all files under ./src
|
||
toSource {
|
||
root = ./.;
|
||
fileset = union
|
||
./Makefile
|
||
./src;
|
||
}
|
||
=> "/nix/store/...-source"
|
||
|
||
# Trying to include a file outside the root will fail
|
||
toSource {
|
||
root = ./.;
|
||
fileset = unions [
|
||
./Makefile
|
||
./src
|
||
../LICENSE
|
||
];
|
||
}
|
||
=> <error>
|
||
|
||
# The root needs to point to a directory that contains all the files
|
||
toSource {
|
||
root = ../.;
|
||
fileset = unions [
|
||
./Makefile
|
||
./src
|
||
../LICENSE
|
||
];
|
||
}
|
||
=> "/nix/store/...-source"
|
||
|
||
# The root has to be a local filesystem path
|
||
toSource {
|
||
root = "/nix/store/...-source";
|
||
fileset = ./.;
|
||
}
|
||
=> <error>
|
||
```
|
||
|
||
:::
|
||
*/
|
||
toSource = {
|
||
root,
|
||
fileset,
|
||
}:
|
||
let
|
||
# We cannot rename matched attribute arguments, so let's work around it with an extra `let in` statement
|
||
filesetArg = fileset;
|
||
in
|
||
let
|
||
fileset = _coerce "lib.fileset.toSource: `fileset`" filesetArg;
|
||
rootFilesystemRoot = (splitRoot root).root;
|
||
filesetFilesystemRoot = (splitRoot fileset._internalBase).root;
|
||
sourceFilter = _toSourceFilter fileset;
|
||
in
|
||
if ! isPath root then
|
||
if root ? _isLibCleanSourceWith then
|
||
throw ''
|
||
lib.fileset.toSource: `root` is a `lib.sources`-based value, but it should be a path instead.
|
||
To use a `lib.sources`-based value, convert it to a file set using `lib.fileset.fromSource` and pass it as `fileset`.
|
||
Note that this only works for sources created from paths.''
|
||
else if isStringLike root then
|
||
throw ''
|
||
lib.fileset.toSource: `root` (${toString root}) is a string-like value, but it should be a path instead.
|
||
Paths in strings are not supported by `lib.fileset`, use `lib.sources` or derivations instead.''
|
||
else
|
||
throw ''
|
||
lib.fileset.toSource: `root` is of type ${typeOf root}, but it should be a path instead.''
|
||
# Currently all Nix paths have the same filesystem root, but this could change in the future.
|
||
# See also ../path/README.md
|
||
else if ! fileset._internalIsEmptyWithoutBase && rootFilesystemRoot != filesetFilesystemRoot then
|
||
throw ''
|
||
lib.fileset.toSource: Filesystem roots are not the same for `fileset` and `root` (${toString root}):
|
||
`root`: Filesystem root is "${toString rootFilesystemRoot}"
|
||
`fileset`: Filesystem root is "${toString filesetFilesystemRoot}"
|
||
Different filesystem roots are not supported.''
|
||
else if ! pathExists root then
|
||
throw ''
|
||
lib.fileset.toSource: `root` (${toString root}) is a path that does not exist.''
|
||
else if pathType root != "directory" then
|
||
throw ''
|
||
lib.fileset.toSource: `root` (${toString root}) is a file, but it should be a directory instead. Potential solutions:
|
||
- If you want to import the file into the store _without_ a containing directory, use string interpolation or `builtins.path` instead of this function.
|
||
- If you want to import the file into the store _with_ a containing directory, set `root` to the containing directory, such as ${toString (dirOf root)}, and set `fileset` to the file path.''
|
||
else if ! fileset._internalIsEmptyWithoutBase && ! hasPrefix root fileset._internalBase then
|
||
throw ''
|
||
lib.fileset.toSource: `fileset` could contain files in ${toString fileset._internalBase}, which is not under the `root` (${toString root}). Potential solutions:
|
||
- Set `root` to ${toString fileset._internalBase} or any directory higher up. This changes the layout of the resulting store path.
|
||
- Set `fileset` to a file set that cannot contain files outside the `root` (${toString root}). This could change the files included in the result.''
|
||
else
|
||
seq sourceFilter
|
||
cleanSourceWith {
|
||
name = "source";
|
||
src = root;
|
||
filter = sourceFilter;
|
||
};
|
||
|
||
|
||
/**
|
||
The list of file paths contained in the given file set.
|
||
|
||
:::{.note}
|
||
This function is strict in the entire file set.
|
||
This is in contrast with combinators [`lib.fileset.union`](#function-library-lib.fileset.union),
|
||
[`lib.fileset.intersection`](#function-library-lib.fileset.intersection) and [`lib.fileset.difference`](#function-library-lib.fileset.difference).
|
||
|
||
Thus it is recommended to call `toList` on file sets created using the combinators,
|
||
instead of doing list processing on the result of `toList`.
|
||
:::
|
||
|
||
The resulting list of files can be turned back into a file set using [`lib.fileset.unions`](#function-library-lib.fileset.unions).
|
||
|
||
|
||
# Inputs
|
||
|
||
`fileset`
|
||
|
||
: The file set whose file paths to return. This argument can also be a path, which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
|
||
|
||
# Type
|
||
|
||
```
|
||
toList :: FileSet -> [ Path ]
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.toList` usage example
|
||
|
||
```nix
|
||
toList ./.
|
||
[ ./README.md ./Makefile ./src/main.c ./src/main.h ]
|
||
|
||
toList (difference ./. ./src)
|
||
[ ./README.md ./Makefile ]
|
||
```
|
||
|
||
:::
|
||
*/
|
||
toList = fileset:
|
||
_toList (_coerce "lib.fileset.toList: Argument" fileset);
|
||
|
||
/**
|
||
The file set containing all files that are in either of two given file sets.
|
||
This is the same as [`unions`](#function-library-lib.fileset.unions),
|
||
but takes just two file sets instead of a list.
|
||
See also [Union (set theory)](https://en.wikipedia.org/wiki/Union_(set_theory)).
|
||
|
||
The given file sets are evaluated as lazily as possible,
|
||
with the first argument being evaluated first if needed.
|
||
|
||
|
||
# Inputs
|
||
|
||
`fileset1`
|
||
|
||
: The first file set. This argument can also be a path, which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
|
||
|
||
`fileset2`
|
||
|
||
: The second file set. This argument can also be a path, which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
|
||
|
||
# Type
|
||
|
||
```
|
||
union :: FileSet -> FileSet -> FileSet
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.union` usage example
|
||
|
||
```nix
|
||
# Create a file set containing the file `Makefile`
|
||
# and all files recursively in the `src` directory
|
||
union ./Makefile ./src
|
||
|
||
# Create a file set containing the file `Makefile`
|
||
# and the LICENSE file from the parent directory
|
||
union ./Makefile ../LICENSE
|
||
```
|
||
|
||
:::
|
||
*/
|
||
union =
|
||
fileset1:
|
||
fileset2:
|
||
_unionMany
|
||
(_coerceMany "lib.fileset.union" [
|
||
{
|
||
context = "First argument";
|
||
value = fileset1;
|
||
}
|
||
{
|
||
context = "Second argument";
|
||
value = fileset2;
|
||
}
|
||
]);
|
||
|
||
/**
|
||
The file set containing all files that are in any of the given file sets.
|
||
This is the same as [`union`](#function-library-lib.fileset.unions),
|
||
but takes a list of file sets instead of just two.
|
||
See also [Union (set theory)](https://en.wikipedia.org/wiki/Union_(set_theory)).
|
||
|
||
The given file sets are evaluated as lazily as possible,
|
||
with earlier elements being evaluated first if needed.
|
||
|
||
|
||
# Inputs
|
||
|
||
`filesets`
|
||
|
||
: A list of file sets. The elements can also be paths, which get [implicitly coerced to file sets](#sec-fileset-path-coercion).
|
||
|
||
# Type
|
||
|
||
```
|
||
unions :: [ FileSet ] -> FileSet
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.unions` usage example
|
||
|
||
```nix
|
||
# Create a file set containing selected files
|
||
unions [
|
||
# Include the single file `Makefile` in the current directory
|
||
# This errors if the file doesn't exist
|
||
./Makefile
|
||
|
||
# Recursively include all files in the `src/code` directory
|
||
# If this directory is empty this has no effect
|
||
./src/code
|
||
|
||
# Include the files `run.sh` and `unit.c` from the `tests` directory
|
||
./tests/run.sh
|
||
./tests/unit.c
|
||
|
||
# Include the `LICENSE` file from the parent directory
|
||
../LICENSE
|
||
]
|
||
```
|
||
|
||
:::
|
||
*/
|
||
unions =
|
||
filesets:
|
||
if ! isList filesets then
|
||
throw ''
|
||
lib.fileset.unions: Argument is of type ${typeOf filesets}, but it should be a list instead.''
|
||
else
|
||
pipe filesets [
|
||
# Annotate the elements with context, used by _coerceMany for better errors
|
||
(imap0 (i: el: {
|
||
context = "Element ${toString i}";
|
||
value = el;
|
||
}))
|
||
(_coerceMany "lib.fileset.unions")
|
||
_unionMany
|
||
];
|
||
|
||
/**
|
||
The file set containing all files that are in both of two given file sets.
|
||
See also [Intersection (set theory)](https://en.wikipedia.org/wiki/Intersection_(set_theory)).
|
||
|
||
The given file sets are evaluated as lazily as possible,
|
||
with the first argument being evaluated first if needed.
|
||
|
||
|
||
# Inputs
|
||
|
||
`fileset1`
|
||
|
||
: The first file set. This argument can also be a path, which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
|
||
|
||
`fileset2`
|
||
|
||
: The second file set. This argument can also be a path, which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
|
||
|
||
# Type
|
||
|
||
```
|
||
intersection :: FileSet -> FileSet -> FileSet
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.intersection` usage example
|
||
|
||
```nix
|
||
# Limit the selected files to the ones in ./., so only ./src and ./Makefile
|
||
intersection ./. (unions [ ../LICENSE ./src ./Makefile ])
|
||
```
|
||
|
||
:::
|
||
*/
|
||
intersection =
|
||
fileset1:
|
||
fileset2:
|
||
let
|
||
filesets = _coerceMany "lib.fileset.intersection" [
|
||
{
|
||
context = "First argument";
|
||
value = fileset1;
|
||
}
|
||
{
|
||
context = "Second argument";
|
||
value = fileset2;
|
||
}
|
||
];
|
||
in
|
||
_intersection
|
||
(elemAt filesets 0)
|
||
(elemAt filesets 1);
|
||
|
||
/**
|
||
The file set containing all files from the first file set that are not in the second file set.
|
||
See also [Difference (set theory)](https://en.wikipedia.org/wiki/Complement_(set_theory)#Relative_complement).
|
||
|
||
The given file sets are evaluated as lazily as possible,
|
||
with the first argument being evaluated first if needed.
|
||
|
||
|
||
# Inputs
|
||
|
||
`positive`
|
||
|
||
: The positive file set. The result can only contain files that are also in this file set. This argument can also be a path, which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
|
||
|
||
`negative`
|
||
|
||
: The negative file set. The result will never contain files that are also in this file set. This argument can also be a path, which gets [implicitly coerced to a file set](#sec-fileset-path-coercion).
|
||
|
||
# Type
|
||
|
||
```
|
||
union :: FileSet -> FileSet -> FileSet
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.difference` usage example
|
||
|
||
```nix
|
||
# Create a file set containing all files from the current directory,
|
||
# except ones under ./tests
|
||
difference ./. ./tests
|
||
|
||
let
|
||
# A set of Nix-related files
|
||
nixFiles = unions [ ./default.nix ./nix ./tests/default.nix ];
|
||
in
|
||
# Create a file set containing all files under ./tests, except ones in `nixFiles`,
|
||
# meaning only without ./tests/default.nix
|
||
difference ./tests nixFiles
|
||
```
|
||
|
||
:::
|
||
*/
|
||
difference =
|
||
positive:
|
||
negative:
|
||
let
|
||
filesets = _coerceMany "lib.fileset.difference" [
|
||
{
|
||
context = "First argument (positive set)";
|
||
value = positive;
|
||
}
|
||
{
|
||
context = "Second argument (negative set)";
|
||
value = negative;
|
||
}
|
||
];
|
||
in
|
||
_difference
|
||
(elemAt filesets 0)
|
||
(elemAt filesets 1);
|
||
|
||
/**
|
||
Filter a file set to only contain files matching some predicate.
|
||
|
||
|
||
# Inputs
|
||
|
||
`predicate`
|
||
|
||
: The predicate function to call on all files contained in given file set.
|
||
A file is included in the resulting file set if this function returns true for it.
|
||
|
||
This function is called with an attribute set containing these attributes:
|
||
|
||
- `name` (String): The name of the file
|
||
|
||
- `type` (String, one of `"regular"`, `"symlink"` or `"unknown"`): The type of the file.
|
||
This matches result of calling [`builtins.readFileType`](https://nixos.org/manual/nix/stable/language/builtins.html#builtins-readFileType) on the file's path.
|
||
|
||
- `hasExt` (String -> Bool): Whether the file has a certain file extension.
|
||
`hasExt ext` is true only if `hasSuffix ".${ext}" name`.
|
||
|
||
This also means that e.g. for a file with name `.gitignore`,
|
||
`hasExt "gitignore"` is true.
|
||
|
||
Other attributes may be added in the future.
|
||
|
||
`path`
|
||
|
||
: The path whose files to filter
|
||
|
||
# Type
|
||
|
||
```
|
||
fileFilter ::
|
||
({
|
||
name :: String,
|
||
type :: String,
|
||
hasExt :: String -> Bool,
|
||
...
|
||
} -> Bool)
|
||
-> Path
|
||
-> FileSet
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.fileFilter` usage example
|
||
|
||
```nix
|
||
# Include all regular `default.nix` files in the current directory
|
||
fileFilter (file: file.name == "default.nix") ./.
|
||
|
||
# Include all non-Nix files from the current directory
|
||
fileFilter (file: ! file.hasExt "nix") ./.
|
||
|
||
# Include all files that start with a "." in the current directory
|
||
fileFilter (file: hasPrefix "." file.name) ./.
|
||
|
||
# Include all regular files (not symlinks or others) in the current directory
|
||
fileFilter (file: file.type == "regular") ./.
|
||
```
|
||
|
||
:::
|
||
*/
|
||
fileFilter =
|
||
predicate:
|
||
path:
|
||
if ! isFunction predicate then
|
||
throw ''
|
||
lib.fileset.fileFilter: First argument is of type ${typeOf predicate}, but it should be a function instead.''
|
||
else if ! isPath path then
|
||
if path._type or "" == "fileset" then
|
||
throw ''
|
||
lib.fileset.fileFilter: Second argument is a file set, but it should be a path instead.
|
||
If you need to filter files in a file set, use `intersection fileset (fileFilter pred ./.)` instead.''
|
||
else
|
||
throw ''
|
||
lib.fileset.fileFilter: Second argument is of type ${typeOf path}, but it should be a path instead.''
|
||
else if ! pathExists path then
|
||
throw ''
|
||
lib.fileset.fileFilter: Second argument (${toString path}) is a path that does not exist.''
|
||
else
|
||
_fileFilter predicate path;
|
||
|
||
/**
|
||
Create a file set with the same files as a `lib.sources`-based value.
|
||
This does not import any of the files into the store.
|
||
|
||
This can be used to gradually migrate from `lib.sources`-based filtering to `lib.fileset`.
|
||
|
||
A file set can be turned back into a source using [`toSource`](#function-library-lib.fileset.toSource).
|
||
|
||
:::{.note}
|
||
File sets cannot represent empty directories.
|
||
Turning the result of this function back into a source using `toSource` will therefore not preserve empty directories.
|
||
:::
|
||
|
||
|
||
# Inputs
|
||
|
||
`source`
|
||
|
||
: 1\. Function argument
|
||
|
||
# Type
|
||
|
||
```
|
||
fromSource :: SourceLike -> FileSet
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.fromSource` usage example
|
||
|
||
```nix
|
||
# There's no cleanSource-like function for file sets yet,
|
||
# but we can just convert cleanSource to a file set and use it that way
|
||
toSource {
|
||
root = ./.;
|
||
fileset = fromSource (lib.sources.cleanSource ./.);
|
||
}
|
||
|
||
# Keeping a previous sourceByRegex (which could be migrated to `lib.fileset.unions`),
|
||
# but removing a subdirectory using file set functions
|
||
difference
|
||
(fromSource (lib.sources.sourceByRegex ./. [
|
||
"^README\.md$"
|
||
# This regex includes everything in ./doc
|
||
"^doc(/.*)?$"
|
||
])
|
||
./doc/generated
|
||
|
||
# Use cleanSource, but limit it to only include ./Makefile and files under ./src
|
||
intersection
|
||
(fromSource (lib.sources.cleanSource ./.))
|
||
(unions [
|
||
./Makefile
|
||
./src
|
||
]);
|
||
```
|
||
|
||
:::
|
||
*/
|
||
fromSource = source:
|
||
let
|
||
# This function uses `._isLibCleanSourceWith`, `.origSrc` and `.filter`,
|
||
# which are technically internal to lib.sources,
|
||
# but we'll allow this since both libraries are in the same code base
|
||
# and this function is a bridge between them.
|
||
isFiltered = source ? _isLibCleanSourceWith;
|
||
path = if isFiltered then source.origSrc else source;
|
||
in
|
||
# We can only support sources created from paths
|
||
if ! isPath path then
|
||
if isStringLike path then
|
||
throw ''
|
||
lib.fileset.fromSource: The source origin of the argument is a string-like value ("${toString path}"), but it should be a path instead.
|
||
Sources created from paths in strings cannot be turned into file sets, use `lib.sources` or derivations instead.''
|
||
else
|
||
throw ''
|
||
lib.fileset.fromSource: The source origin of the argument is of type ${typeOf path}, but it should be a path instead.''
|
||
else if ! pathExists path then
|
||
throw ''
|
||
lib.fileset.fromSource: The source origin (${toString path}) of the argument is a path that does not exist.''
|
||
else if isFiltered then
|
||
_fromSourceFilter path source.filter
|
||
else
|
||
# If there's no filter, no need to run the expensive conversion, all subpaths will be included
|
||
_singleton path;
|
||
|
||
/**
|
||
Create a file set containing all [Git-tracked files](https://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository) in a repository.
|
||
|
||
This function behaves like [`gitTrackedWith { }`](#function-library-lib.fileset.gitTrackedWith) - using the defaults.
|
||
|
||
|
||
# Inputs
|
||
|
||
`path`
|
||
|
||
: The [path](https://nixos.org/manual/nix/stable/language/values#type-path) to the working directory of a local Git repository.
|
||
This directory must contain a `.git` file or subdirectory.
|
||
|
||
# Type
|
||
|
||
```
|
||
gitTracked :: Path -> FileSet
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.gitTracked` usage example
|
||
|
||
```nix
|
||
# Include all files tracked by the Git repository in the current directory
|
||
gitTracked ./.
|
||
|
||
# Include only files tracked by the Git repository in the parent directory
|
||
# that are also in the current directory
|
||
intersection ./. (gitTracked ../.)
|
||
```
|
||
|
||
:::
|
||
*/
|
||
gitTracked =
|
||
path:
|
||
_fromFetchGit
|
||
"gitTracked"
|
||
"argument"
|
||
path
|
||
{};
|
||
|
||
/**
|
||
Create a file set containing all [Git-tracked files](https://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository) in a repository.
|
||
The first argument allows configuration with an attribute set,
|
||
while the second argument is the path to the Git working tree.
|
||
|
||
`gitTrackedWith` does not perform any filtering when the path is a [Nix store path](https://nixos.org/manual/nix/stable/store/store-path.html#store-path) and not a repository.
|
||
In this way, it accommodates the use case where the expression that makes the `gitTracked` call does not reside in an actual git repository anymore,
|
||
and has presumably already been fetched in a way that excludes untracked files.
|
||
Fetchers with such equivalent behavior include `builtins.fetchGit`, `builtins.fetchTree` (experimental), and `pkgs.fetchgit` when used without `leaveDotGit`.
|
||
|
||
If you don't need the configuration,
|
||
you can use [`gitTracked`](#function-library-lib.fileset.gitTracked) instead.
|
||
|
||
This is equivalent to the result of [`unions`](#function-library-lib.fileset.unions) on all files returned by [`git ls-files`](https://git-scm.com/docs/git-ls-files)
|
||
(which uses [`--cached`](https://git-scm.com/docs/git-ls-files#Documentation/git-ls-files.txt--c) by default).
|
||
|
||
:::{.warning}
|
||
Currently this function is based on [`builtins.fetchGit`](https://nixos.org/manual/nix/stable/language/builtins.html#builtins-fetchGit)
|
||
As such, this function causes all Git-tracked files to be unnecessarily added to the Nix store,
|
||
without being re-usable by [`toSource`](#function-library-lib.fileset.toSource).
|
||
|
||
This may change in the future.
|
||
:::
|
||
|
||
|
||
# Inputs
|
||
|
||
`options` (attribute set)
|
||
: `recurseSubmodules` (optional, default: `false`)
|
||
: Whether to recurse into [Git submodules](https://git-scm.com/book/en/v2/Git-Tools-Submodules) to also include their tracked files.
|
||
If `true`, this is equivalent to passing the [--recurse-submodules](https://git-scm.com/docs/git-ls-files#Documentation/git-ls-files.txt---recurse-submodules) flag to `git ls-files`.
|
||
|
||
`path`
|
||
: The [path](https://nixos.org/manual/nix/stable/language/values#type-path) to the working directory of a local Git repository.
|
||
This directory must contain a `.git` file or subdirectory.
|
||
|
||
# Type
|
||
|
||
```
|
||
gitTrackedWith :: { recurseSubmodules :: Bool ? false } -> Path -> FileSet
|
||
```
|
||
|
||
# Examples
|
||
:::{.example}
|
||
## `lib.fileset.gitTrackedWith` usage example
|
||
|
||
```nix
|
||
# Include all files tracked by the Git repository in the current directory
|
||
# and any submodules under it
|
||
gitTracked { recurseSubmodules = true; } ./.
|
||
```
|
||
|
||
:::
|
||
*/
|
||
gitTrackedWith =
|
||
{
|
||
recurseSubmodules ? false,
|
||
}:
|
||
path:
|
||
if ! isBool recurseSubmodules then
|
||
throw "lib.fileset.gitTrackedWith: Expected the attribute `recurseSubmodules` of the first argument to be a boolean, but it's a ${typeOf recurseSubmodules} instead."
|
||
else if recurseSubmodules && versionOlder nixVersion _fetchGitSubmodulesMinver then
|
||
throw "lib.fileset.gitTrackedWith: Setting the attribute `recurseSubmodules` to `true` is only supported for Nix version ${_fetchGitSubmodulesMinver} and after, but Nix version ${nixVersion} is used."
|
||
else
|
||
_fromFetchGit
|
||
"gitTrackedWith"
|
||
"second argument"
|
||
path
|
||
# This is the only `fetchGit` parameter that makes sense in this context.
|
||
# We can't just pass `submodules = recurseSubmodules` here because
|
||
# this would fail for Nix versions that don't support `submodules`.
|
||
(lib.optionalAttrs recurseSubmodules {
|
||
submodules = true;
|
||
});
|
||
}
|