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* Compatibility hack so that Nixpkgs can continue to do hash checking

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in `fetchurl' in Nix <= 0.7, but doesn't in Nix 0.8.
This commit is contained in:
Eelco Dolstra 2005-02-22 15:23:24 +00:00
parent 3c1630131e
commit eda2c3c253
2 changed files with 10 additions and 1 deletions
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9
src/libstore/build.cc
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@ -989,6 +989,15 @@ void DerivationGoal::startBuilder()
/* Also set TMPDIR and variants to point to this directory. */
env["TMPDIR"] = env["TEMPDIR"] = env["TMP"] = env["TEMP"] = tmpDir;
/* Compatibility hack with Nix <= 0.7: if this is a fixed-output
derivation, tell the builder, so that for instance `fetchurl'
can skip checking the output. On older Nixes, this environment
variable won't be set, so `fetchurl' will do the check. */
for (DerivationOutputs::iterator i = drv.outputs.begin();
i != drv.outputs.end(); ++i)
if (i->second.hash != "")
env["NIX_OUTPUT_CHECKED"] = "1";
/* Run the builder. */
printMsg(lvlChatty, format("executing builder `%1%'") %
drv.builder);