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| author | Eelco Dolstra <edolstra@gmail.com> | 2020-02-02 13:14:34 +0100 |
|---|---|---|
| committer | Eelco Dolstra <edolstra@gmail.com> | 2020-02-02 13:14:34 +0100 |
| commit | af35b318f3312ba8147fe2d44eef71ad7924939e (patch) | |
| tree | 9d5510a1e0f4d301d0c710f1d821d550ce4920fa /src/libexpr/flake/flake.cc | |
| parent | a9ebc3ea5db2fb0cbf7ab8ea35c9d9d5073abfc8 (diff) | |
Detect circular flake imports
Fixes #2997.
Diffstat (limited to 'src/libexpr/flake/flake.cc')
| -rw-r--r-- | src/libexpr/flake/flake.cc | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/libexpr/flake/flake.cc b/src/libexpr/flake/flake.cc index 8b92da2c3..e3fb02591 100644 --- a/src/libexpr/flake/flake.cc +++ b/src/libexpr/flake/flake.cc @@ -4,6 +4,7 @@ #include "eval-inline.hh" #include "store-api.hh" #include "fetchers/fetchers.hh" +#include "finally.hh" #include <iostream> #include <ctime> @@ -387,6 +388,8 @@ LockedFlake lockFlake( const InputPath & inputPathPrefix)> updateLocks; + std::vector<FlakeRef> parents; + updateLocks = [&]( const FlakeInputs & flakeInputs, const LockedInputs & oldLocks, @@ -506,6 +509,14 @@ LockedFlake lockFlake( flake. Also, unless we already have this flake in the top-level lock file, use this flake's own lock file. */ + + /* Guard against circular flake imports. */ + for (auto & parent : parents) + if (parent == input.ref) + throw Error("found circular import of flake '%s'", parent); + parents.push_back(input.ref); + Finally cleanup([&]() { parents.pop_back(); }); + updateLocks(inputFlake.inputs, oldLock != oldLocks.inputs.end() ? (const LockedInputs &) oldLock->second |