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