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Upgrade downstreamPlaceholder to a type with methods

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This gets us ready for dynamic derivation dependencies (part of RFC 92).
This commit is contained in:
John Ericson 2023-05-11 18:01:41 -04:00
parent e7c1113a37
commit b9e5ce4a27
10 changed files with 152 additions and 30 deletions
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5
src/libexpr/eval.cc
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@ -4,6 +4,7 @@
#include "util.hh"
#include "store-api.hh"
#include "derivations.hh"
#include "downstream-placeholder.hh"
#include "globals.hh"
#include "eval-inline.hh"
#include "filetransfer.hh"
@ -1058,7 +1059,7 @@ void EvalState::mkOutputString(
? store->printStorePath(*std::move(optOutputPath))
/* Downstream we would substitute this for an actual path once
we build the floating CA derivation */
: downstreamPlaceholder(*store, drvPath, outputName),
: DownstreamPlaceholder::unknownCaOutput(drvPath, outputName).render(),
NixStringContext {
NixStringContextElem::Built {
.drvPath = drvPath,
@ -2380,7 +2381,7 @@ DerivedPath EvalState::coerceToDerivedPath(const PosIdx pos, Value & v, std::str
// This is testing for the case of CA derivations
auto sExpected = optOutputPath
? store->printStorePath(*optOutputPath)
: downstreamPlaceholder(*store, b.drvPath, output);
: DownstreamPlaceholder::unknownCaOutput(b.drvPath, output).render();
if (s != sExpected)
error(
"string '%s' has context with the output '%s' from derivation '%s', but the string is not the right placeholder for this derivation output. It should be '%s'",