experimental/hash
adding primop function calculating hash of a string Signed-off-by: Marc Weber <marco-oweber@gmx.de>
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3 changed files with 33 additions and 0 deletions
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@ -1107,6 +1107,30 @@ static void prim_unsafeDiscardOutputDependency(EvalState & state, Value * * args
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}
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}
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static void prim_hash(EvalState & state, Value * * args, Value & v)
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{
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PathSet context;
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string type = state.forceStringNoCtx(*args[0]);
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string s = state.forceStringNoCtx(*args[1]);
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HashType ht;
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if (type == "md5"){
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ht = htMD5;
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} else if (type == "sha256"){
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ht = htSHA256;
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} else {
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throw Error(format("bad hash type `%1%'") % type);
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}
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Hash h = hashString(ht, s);
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string hash = printHash(h);
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mkString(v, hash, context);
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};
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/*************************************************************
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/*************************************************************
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* Versions
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* Versions
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*************************************************************/
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*************************************************************/
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@ -1235,6 +1259,8 @@ void EvalState::createBaseEnv()
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addPrimOp("__unsafeDiscardStringContext", 1, prim_unsafeDiscardStringContext);
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addPrimOp("__unsafeDiscardStringContext", 1, prim_unsafeDiscardStringContext);
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addPrimOp("__unsafeDiscardOutputDependency", 1, prim_unsafeDiscardOutputDependency);
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addPrimOp("__unsafeDiscardOutputDependency", 1, prim_unsafeDiscardOutputDependency);
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addPrimOp("__hash", 2, prim_hash);
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// Versions
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// Versions
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addPrimOp("__parseDrvName", 1, prim_parseDrvName);
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addPrimOp("__parseDrvName", 1, prim_parseDrvName);
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addPrimOp("__compareVersions", 2, prim_compareVersions);
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addPrimOp("__compareVersions", 2, prim_compareVersions);
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1
tests/lang/eval-okay-hash.exp
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1
tests/lang/eval-okay-hash.exp
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@ -0,0 +1 @@
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[ "6c69ee7f211c640419d5366cc076ae46" "bb3438fbabd460ea6dbd27d153e2233b" "900a4469df00ccbfd0c145c6d1e4b7953dd0afafadd7534e3a4019e8d38fc663" "ad0387b3bd8652f730ca46d25f9c170af0fd589f42e7f23f5a9e6412d97d7e56" ]
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6
tests/lang/eval-okay-hash.nix
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6
tests/lang/eval-okay-hash.nix
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@ -0,0 +1,6 @@
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let
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md5 = builtins.hash "md5";
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sha256 = builtins.hash "sha256";
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strings = [ "text 1" "text 2" ];
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in
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(builtins.map md5 strings) ++ (builtins.map sha256 strings)
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