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This commit is contained in:
Wouter den Breejen 2007-05-15 09:26:33 +00:00
parent 1a793c60ce
commit b712f0f019
7 changed files with 164 additions and 13 deletions
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69
src/libexpr/primops.cc
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@ -346,6 +346,13 @@ static Hash hashDerivationModulo(EvalState & state, Derivation drv)
}
static Expr prim_mkStatePath2(EvalState & state, const ATermVector & args)
{
PathSet context;
return makeStr("$statepath", context);
}
/* Construct (as a unobservable side effect) a Nix derivation
expression that performs the derivation described by the argument
set. Returns the original set extended with the following
@ -384,6 +391,12 @@ static Expr prim_derivationStrict(EvalState & state, const ATermVector & args)
string outputHashAlgo;
bool outputHashRecursive = false;
//state vars
bool enableState = false;
string shareState = "none";
string syncState = "all";
StringSet dirs;
for (ATermMap::const_iterator i = attrs.begin(); i != attrs.end(); ++i) {
string key = aterm2String(i->key);
ATerm value;
@ -410,6 +423,12 @@ static Expr prim_derivationStrict(EvalState & state, const ATermVector & args)
}
}
//state variables
else if(key == "dirs") { }
else if(key == "shareState") { string s = coerceToString(state, value, context, true); shareState = s; }
else if(key == "synchronization") { string s = coerceToString(state, value, context, true); syncState = s; }
else if(key == "enableState") { bool b = evalBool(state, value); enableState = b; }
/* All other attributes are passed to the builder through
the environment. */
else {
@ -489,24 +508,25 @@ static Expr prim_derivationStrict(EvalState & state, const ATermVector & args)
have an empty value. This ensures that changes in the set of
output names do get reflected in the hash. */
drv.env["out"] = "";
drv.outputs["out"] =
DerivationOutput("", outputHashAlgo, outputHash);
drv.outputs["out"] = DerivationOutput("", outputHashAlgo, outputHash);
/* Use the masked derivation expression to compute the output
path. */
Path outPath = makeStorePath("output:out",
hashDerivationModulo(state, drv), drvName);
Path outPath = makeStorePath("output:out", hashDerivationModulo(state, drv), drvName);
/* Construct the final derivation store expression. */
drv.env["out"] = outPath;
drv.outputs["out"] =
DerivationOutput(outPath, outputHashAlgo, outputHash);
drv.outputs["out"] = DerivationOutput(outPath, outputHashAlgo, outputHash);
/* Add the state path based on the outPath */
//hash h = ....
drv.env["statepath"] = outPath;
drv.stateOutputs["statepath"] = DerivationStateOutput(outPath, outputHashAlgo, outputHash, enableState, shareState, syncState, dirs);
/* Write the resulting term into the Nix store directory. */
Path drvPath = writeDerivation(drv, drvName);
printMsg(lvlChatty, format("instantiated `%1%' -> `%2%'")
% drvName % drvPath);
printMsg(lvlChatty, format("instantiated `%1%' -> `%2%'") % drvName % drvPath);
/* Optimisation, but required in read-only mode! because in that
case we don't actually write store expressions, so we can't
@ -574,8 +594,41 @@ static Expr prim_baseNameOf(EvalState & state, const ATermVector & args)
{
PathSet context;
return makeStr(baseNameOf(coerceToString(state, args[0], context)), context);
}
/* ..... */
static Expr prim_mkStatePath(EvalState & state, const ATermVector & args)
{
PathSet context;
string indentifier = coerceToString(state, args[0], context);
string subdir = coerceToString(state, args[1], context);
string callingUser = "wouterdb"; //TODO: Change into variable
string statePrefix = "/nix/state/"; //TODO: Change into variable
//calculate state hash
Hash hash = hashString(htSHA256, indentifier + callingUser);
//make the path
string path = statePrefix + printHash(hash) + "/";
if(subdir == "")
{
}
else
{
path = path + subdir;
}
//PRE BUILD, After DRV Rewrite:
//ensureDir
//system("chown callingUser.root " + path);
//share state location if nessesary
return makeStr(path, context);
}
/* Return the directory of the given path, i.e., everything before the
last slash. Return either a path or a string depending on the type