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Merge pull request #9398 from Qyriad/fixes/flake-not-found

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flakes: bare minimum fix the error message for untracked flake.nix
(cherry picked from commit 7f626dba332f320fafb9f9c749986ea523d20f42)
Change-Id: I470ac56a670a8c11e4164c6b059184a02344d491
This commit is contained in:
eldritch horrors 2024-03-04 06:03:33 +01:00
parent cba87025f8
commit cad1683048
1 changed files with 9 additions and 4 deletions
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13
src/libexpr/flake/flake.cc
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@ -205,8 +205,16 @@ static Flake getFlake(
auto [sourceInfo, resolvedRef, lockedRef] = fetchOrSubstituteTree( auto [sourceInfo, resolvedRef, lockedRef] = fetchOrSubstituteTree(
state, originalRef, allowLookup, flakeCache); state, originalRef, allowLookup, flakeCache);
// We need to guard against symlink attacks, but before we start doing
// filesystem operations we should make sure there's a flake.nix in the
// first place.
auto unsafeFlakeDir = sourceInfo.actualPath + "/" + lockedRef.subdir;
auto unsafeFlakeFile = unsafeFlakeDir + "/flake.nix";
if (!pathExists(unsafeFlakeFile))
throw Error("source tree referenced by '%s' does not contain a '%s/flake.nix' file", lockedRef, lockedRef.subdir);
// Guard against symlink attacks. // Guard against symlink attacks.
auto flakeDir = canonPath(sourceInfo.actualPath + "/" + lockedRef.subdir, true); auto flakeDir = canonPath(unsafeFlakeDir, true);
auto flakeFile = canonPath(flakeDir + "/flake.nix", true); auto flakeFile = canonPath(flakeDir + "/flake.nix", true);
if (!isInDir(flakeFile, sourceInfo.actualPath)) if (!isInDir(flakeFile, sourceInfo.actualPath))
throw Error("'flake.nix' file of flake '%s' escapes from '%s'", throw Error("'flake.nix' file of flake '%s' escapes from '%s'",
@ -219,9 +227,6 @@ static Flake getFlake(
.sourceInfo = std::make_shared<fetchers::Tree>(std::move(sourceInfo)) .sourceInfo = std::make_shared<fetchers::Tree>(std::move(sourceInfo))
}; };
if (!pathExists(flakeFile))
throw Error("source tree referenced by '%s' does not contain a '%s/flake.nix' file", lockedRef, lockedRef.subdir);
Value vInfo; Value vInfo;
state.evalFile(CanonPath(flakeFile), vInfo, true); // FIXME: symlink attack state.evalFile(CanonPath(flakeFile), vInfo, true); // FIXME: symlink attack