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Move MountedSourceAccessor to libutil

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This commit is contained in:
Eelco Dolstra 2025-02-18 22:30:23 +01:00
parent f201446983
commit 0da81343d7
4 changed files with 2 additions and 2 deletions
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2
src/libfetchers/meson.build
View file

@ -54,7 +54,6 @@ sources = files(
'github.cc',
'indirect.cc',
'mercurial.cc',
'mounted-source-accessor.cc',
'path.cc',
'registry.cc',
'store-path-accessor.cc',
@ -72,7 +71,6 @@ headers = files(
'filtering-source-accessor.hh',
'git-lfs-fetch.hh',
'git-utils.hh',
'mounted-source-accessor.hh',
'registry.hh',
'store-path-accessor.hh',
'tarball.hh',

79
src/libfetchers/mounted-source-accessor.cc
View file

@ -1,79 +0,0 @@
#include "mounted-source-accessor.hh"
namespace nix {
struct MountedSourceAccessor : SourceAccessor
{
std::map<CanonPath, ref<SourceAccessor>> mounts;
MountedSourceAccessor(std::map<CanonPath, ref<SourceAccessor>> _mounts)
: mounts(std::move(_mounts))
{
displayPrefix.clear();
// Currently we require a root filesystem. This could be relaxed.
assert(mounts.contains(CanonPath::root));
// FIXME: return dummy parent directories automatically?
}
std::string readFile(const CanonPath & path) override
{
auto [accessor, subpath] = resolve(path);
return accessor->readFile(subpath);
}
bool pathExists(const CanonPath & path) override
{
auto [accessor, subpath] = resolve(path);
return accessor->pathExists(subpath);
}
std::optional<Stat> maybeLstat(const CanonPath & path) override
{
auto [accessor, subpath] = resolve(path);
return accessor->maybeLstat(subpath);
}
DirEntries readDirectory(const CanonPath & path) override
{
auto [accessor, subpath] = resolve(path);
return accessor->readDirectory(subpath);
}
std::string readLink(const CanonPath & path) override
{
auto [accessor, subpath] = resolve(path);
return accessor->readLink(subpath);
}
std::string showPath(const CanonPath & path) override
{
auto [accessor, subpath] = resolve(path);
return displayPrefix + accessor->showPath(subpath) + displaySuffix;
}
std::pair<ref<SourceAccessor>, CanonPath> resolve(CanonPath path)
{
// Find the nearest parent of `path` that is a mount point.
std::vector<std::string> subpath;
while (true) {
auto i = mounts.find(path);
if (i != mounts.end()) {
std::reverse(subpath.begin(), subpath.end());
return {i->second, CanonPath(subpath)};
}
assert(!path.isRoot());
subpath.push_back(std::string(*path.baseName()));
path.pop();
}
}
};
ref<SourceAccessor> makeMountedSourceAccessor(std::map<CanonPath, ref<SourceAccessor>> mounts)
{
return make_ref<MountedSourceAccessor>(std::move(mounts));
}
}

9
src/libfetchers/mounted-source-accessor.hh
View file

@ -1,9 +0,0 @@
#pragma once
#include "source-accessor.hh"
namespace nix {
ref<SourceAccessor> makeMountedSourceAccessor(std::map<CanonPath, ref<SourceAccessor>> mounts);
}