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authorEelco Dolstra <edolstra@gmail.com>2018-01-12T16·31+0100
committerEelco Dolstra <edolstra@gmail.com>2018-01-12T16·31+0100
commit74f75c855837bce7f48491e9ce8ac03794e5b40d (patch)
treeedf3ff8bfd9ebd4bf038a78dc7991ebe3f1b28e2 /src/libexpr/eval.hh
parent435ccc798077e6291fd34fd1720c6abcf3521557 (diff)
import, builtins.readFile: Handle diverted stores
Fixes #1791
Diffstat (limited to 'src/libexpr/eval.hh')
-rw-r--r--src/libexpr/eval.hh9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index f0ab1435bff3..cc971ae80a43 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -112,6 +112,15 @@ public:
 
     void checkURI(const std::string & uri);
 
+    /* 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. */
+    Path toRealPath(const Path & path, const PathSet & context);
+
     /* Parse a Nix expression from the specified file. */
     Expr * parseExprFromFile(const Path & path);
     Expr * parseExprFromFile(const Path & path, StaticEnv & staticEnv);