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nix-prefetch-url -A: Use "name" attribute from Nix expression

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This is in particular useful for fetchFromGitHub et al., ensuring that
the store path produced by nix-prefetch-url corresponds to what those
functions expect.
This commit is contained in:
Eelco Dolstra 2015-10-07 14:47:39 +02:00
parent b54f447df9
commit e4abf8610b
1 changed files with 8 additions and 1 deletions
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9
src/nix-prefetch-url/nix-prefetch-url.cc
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@ -54,6 +54,7 @@ int main(int argc, char * * argv)
string attrPath;
std::map<string, string> autoArgs_;
bool unpack = false;
string name;
parseCmdLine(argc, argv, [&](Strings::iterator & arg, const Strings::iterator & end) {
if (*arg == "--help")
@ -122,10 +123,16 @@ int main(int argc, char * * argv)
printMsg(lvlInfo, "warning: this does not look like a fetchurl call");
else
unpack = state.forceString(*attr->value) == "recursive";
/* Extract the name. */
attr = v.attrs->find(state.symbols.create("name"));
if (attr != v.attrs->end())
name = state.forceString(*attr->value);
}
/* Figure out a name in the Nix store. */
auto name = baseNameOf(uri);
if (name.empty())
name = baseNameOf(uri);
if (name.empty())
throw Error(format("cannot figure out file name for ‘%1%’") % uri);