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* Unify the treatment of sources copied to the store, and recursive

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SHA-256 outputs of fixed-output derivations.  I.e. they now produce
  the same store path:

  $ nix-store --add x
  /nix/store/j2fq9qxvvxgqymvpszhs773ncci45xsj-x

  $ nix-store --add-fixed --recursive sha256 x
  /nix/store/j2fq9qxvvxgqymvpszhs773ncci45xsj-x

  the latter being the same as the path that a derivation

    derivation {
      name = "x";
      outputHashAlgo = "sha256";
      outputHashMode = "recursive";
      outputHash = "...";
      ...
    };

  produces.

  This does change the output path for such fixed-output derivations.
  Fortunately they are quite rare.  The most common use is fetchsvn
  calls with SHA-256 hashes.  (There are a handful of those is
  Nixpkgs, mostly unstable development packages.)
  
* Documented the computation of store paths (in store-api.cc).
This commit is contained in:
Eelco Dolstra 2008-12-03 15:06:30 +00:00
parent 09bc0c502c
commit 64519cfd65
12 changed files with 191 additions and 79 deletions
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5
src/nix-store/nix-store.cc
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@ -129,7 +129,7 @@ static void opAddFixed(Strings opFlags, Strings opArgs)
opArgs.pop_front();
for (Strings::iterator i = opArgs.begin(); i != opArgs.end(); ++i)
cout << format("%1%\n") % store->addToStore(*i, true, recursive, hashAlgo);
cout << format("%1%\n") % store->addToStore(*i, recursive, hashAlgo);
}
@ -151,6 +151,9 @@ static void opPrintFixedPath(Strings opFlags, Strings opArgs)
if (*i == "--recursive") recursive = true;
else throw UsageError(format("unknown flag `%1%'") % *i);
if (opArgs.size() != 3)
throw UsageError(format("`--print-fixed-path' requires three arguments"));
Strings::iterator i = opArgs.begin();
string hashAlgo = *i++;
string hash = *i++;