nix::EvalPaths Class Reference

Classes
struct	PathResult

Public Member Functions
	EvalPaths (AsyncIoRoot &aio, const ref< Store > &store, SearchPath searchPath, EvalErrorContext &errors)
const SearchPath &	searchPath () const
void	allowPath (const Path &path)
void	allowPath (const StorePath &storePath)
void	allowAndSetStorePathString (const StorePath &storePath, Value &v)
CheckedSourcePath	checkSourcePath (const SourcePath &path)
CheckedSourcePath	resolveExprPath (SourcePath path)
void	checkURI (const std::string &uri)
Path	toRealPath (const Path &path, const NixStringContext &context)
kj::Promise< Result< PathResult< SourcePath, ThrownError > > >	findFile (const std::string_view path)
kj::Promise< Result< PathResult< SourcePath, ThrownError > > >	findFile (const SearchPath &searchPath, const std::string_view path, const PosIdx pos=noPos)
kj::Promise< Result< std::optional< std::string > > >	resolveSearchPathPath (const SearchPath::Path &path)
kj::Promise< Result< PathResult< StorePath, EvalError > > >	copyPathToStore (NixStringContext &context, const SourcePath &path, RepairFlag repair=NoRepair)
void	mkStorePathString (const StorePath &storePath, Value &v)

Member Function Documentation

allowAndSetStorePathString()

void nix::EvalPaths::allowAndSetStorePathString	(	const StorePath &	storePath,
		Value &	v )

Allow access to a store path and return it as a string.

allowPath() [1/2]

void nix::EvalPaths::allowPath

(

const Path &

path

)

Allow access to a path.

allowPath() [2/2]

void nix::EvalPaths::allowPath

(

const StorePath &

storePath

)

Allow access to a store path. Note that this gets remapped to the real store path if store is a chroot store.

checkSourcePath()

CheckedSourcePath nix::EvalPaths::checkSourcePath

(

const SourcePath &

path

)

Check whether access to a path is allowed and throw an error if not. Otherwise return the canonicalised path.

findFile()

kj::Promise< Result< EvalPaths::PathResult< SourcePath, ThrownError > > > nix::EvalPaths::findFile

(

const std::string_view

path

)

Look up a file in the search path.

mkStorePathString()

void nix::EvalPaths::mkStorePathString	(	const StorePath &	storePath,
		Value &	v )

Create a string representing a store path.

The string is the printed store path with a context containing a single NixStringContextElem::Opaque element of that store path.

resolveExprPath()

CheckedSourcePath nix::EvalPaths::resolveExprPath

(

SourcePath

path

)

If path refers to a directory, then append "/default.nix".

resolveSearchPathPath()

kj::Promise< Result< std::optional< std::string > > > nix::EvalPaths::resolveSearchPathPath

(

const SearchPath::Path &

path

)

Try to resolve a search path value (not the optinal key part)

If the specified search path element is a URI, download it.

If it is not found, return std::nullopt

toRealPath()

Path nix::EvalPaths::toRealPath	(	const Path &	path,
		const NixStringContext &	context )

When using a diverted store and 'path' is in the Nix store, map 'path' to the diverted location (e.g. /nix/store/foo is mapped to /home/alice/my-nix/nix/store/foo). However, this is only done if the context is not empty, since otherwise we're probably trying to read from the actual /nix/store. This is intended to distinguish between import-from-derivation and sources stored in the actual /nix/store.

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The documentation for this class was generated from the following files:

• lix/libexpr/eval.hh
• lix/libexpr/eval.cc