common-eval-args.hh File Reference

#include "lix/libexpr/eval-error.hh"
#include "lix/libexpr/eval.hh"
#include "lix/libutil/args.hh"
#include "lix/libmain/common-args.hh"
#include "lix/libexpr/search-path.hh"

Go to the source code of this file.

Classes
struct	nix::MixEvalArgs

Functions
kj::Promise< Result< EvalPaths::PathResult< SourcePath, ThrownError > > >	nix::lookupFileArg (Evaluator &state, std::string_view fileArg)
	Resolve an argument that is generally a file, but could be something that is easy to resolve to a file, like a <lookup path> or a tarball URL.

Function Documentation

lookupFileArg()

kj::Promise< Result< EvalPaths::PathResult< SourcePath, ThrownError > > > nix::lookupFileArg	(	Evaluator &	state,
		std::string_view	fileArg )

Resolve an argument that is generally a file, but could be something that is easy to resolve to a file, like a <lookup path> or a tarball URL.

In particular, this will resolve and fetch pseudo-URLs starting with channel:, flakerefs starting with flake:, and anything that nix::fetchers::downloadTarball() can take.

Non-absolute files are looked up relative to the current directory(?) FIXME: the process's current directory or EvalState's current directory?

Parameters

state	The nix::EvalState to base settings, store, and nixPath from.
fileArg	The the path-ish to resolve.

Returns

A nix::SourcePath to the resolved and fetched file.

Exceptions

nix::FileTransferError	from nix::fetchers::downloadTarball(). Probably others.
nix::ThrownError	for failed search path lookup. Probably others.