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* Refactoring to support different installation sources in nix-env.

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* Set the references for the user environment manifest properly.
* Don't copy the manifest (this was accidental).
* Don't store derivation paths in the manifest (maybe this should be
  made optional).  This cleans up the semantics of nix-env, which were
  weird.
* Hash on the output paths of activated components, not on derivation
  paths.  This is because we don't know the derivation path of already
  installed components anymore, and it allows the installation of
  components by store path (skipping Nix expressions entirely).
* Query options `--out-path' and `--drv-path' to show the output and
  derivation paths of components, respectively (the latter replaces
  the `--expr' query).
This commit is contained in:
Eelco Dolstra 2005-02-11 16:56:45 +00:00
parent 80870d9291
commit 20ce2642fc
5 changed files with 125 additions and 61 deletions
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21
src/libexpr/primops.cc
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@ -94,6 +94,7 @@ static void processBinding(EvalState & state, Expr e, Derivation & drv,
else if (matchAttrs(e, es)) {
Expr a = queryAttr(e, "type");
if (a && evalString(state, a) == "derivation") {
a = queryAttr(e, "drvPath");
if (!a) throw Error("derivation name missing");
@ -104,12 +105,22 @@ static void processBinding(EvalState & state, Expr e, Derivation & drv,
/* !!! supports only single output path */
Path outPath = evalPath(state, a);
StringSet ids;
ids.insert("out");
drv.inputDrvs[drvPath] = ids;
drv.inputDrvs[drvPath] = singleton<StringSet>("out");
ss.push_back(outPath);
} else
throw Error("invalid derivation attribute");
}
else if (a && evalString(state, a) == "storePath") {
a = queryAttr(e, "outPath");
if (!a) throw Error("output path missing");
/* !!! supports only single output path */
Path outPath = evalPath(state, a);
drv.inputSrcs.insert(outPath);
ss.push_back(outPath);
}
else throw Error("invalid derivation attribute");
}
else if (matchPath(e, s)) {