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libexpr-c: Add nix_string_realise

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This commit is contained in:
Robert Hensing 2024-04-05 16:08:18 +02:00
parent 62f8d8c9a9
commit 02c41aba5b
7 changed files with 235 additions and 10 deletions
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55
src/libexpr-c/nix_api_value.cc
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@ -2,6 +2,7 @@
#include "config.hh"
#include "eval.hh"
#include "globals.hh"
#include "path.hh"
#include "primops.hh"
#include "value.hh"
@ -9,7 +10,9 @@
#include "nix_api_expr_internal.h"
#include "nix_api_util.h"
#include "nix_api_util_internal.h"
#include "nix_api_store_internal.h"
#include "nix_api_value.h"
#include "value/context.hh"
#ifdef HAVE_BOEHMGC
# include "gc/gc.h"
@ -528,3 +531,55 @@ void nix_bindings_builder_free(BindingsBuilder * bb)
delete (nix::BindingsBuilder *) bb;
#endif
}
nix_realised_string * nix_string_realise(nix_c_context * context, EvalState * state, Value * value, bool isIFD)
{
if (context)
context->last_err_code = NIX_OK;
try {
auto &v = check_value_not_null(value);
nix::NixStringContext stringContext;
auto rawStr = state->state.coerceToString(nix::noPos, v, stringContext, "while realising a string").toOwned();
nix::StorePathSet storePaths;
auto rewrites = state->state.realiseContext(stringContext, &storePaths);
auto s = nix::rewriteStrings(rawStr, rewrites);
// Convert to the C API StorePath type and convert to vector for index-based access
std::vector<StorePath> vec;
for (auto &sp : storePaths) {
vec.push_back(StorePath{sp});
}
return new nix_realised_string {
.str = s,
.storePaths = vec
};
}
NIXC_CATCH_ERRS_NULL
}
void nix_realised_string_free(nix_realised_string * s)
{
delete s;
}
size_t nix_realised_string_get_buffer_size(nix_realised_string * s)
{
return s->str.size();
}
const char * nix_realised_string_get_buffer_start(nix_realised_string * s)
{
return s->str.data();
}
size_t nix_realised_string_get_store_path_count(nix_realised_string * s)
{
return s->storePaths.size();
}
const StorePath * nix_realised_string_get_store_path(nix_realised_string * s, size_t i)
{
return &s->storePaths[i];
}