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* `nix --query --expansion' (`-qe') to get any path with content 

corresponding to the given id.
This commit is contained in:
Eelco Dolstra 2003-07-22 10:24:22 +00:00
parent d84931ee56
commit df648c4967
1 changed files with 13 additions and 3 deletions
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16
src/nix.cc
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@ -106,18 +106,19 @@ static void opAdd(Strings opFlags, Strings opArgs)
/* Perform various sorts of queries. */
static void opQuery(Strings opFlags, Strings opArgs)
{
enum { qPaths, qRefs, qGenerators, qUnknown } query = qPaths;
enum { qList, qRefs, qGenerators, qExpansion } query = qList;
for (Strings::iterator i = opFlags.begin();
i != opFlags.end(); i++)
if (*i == "--list" || *i == "-l") query = qPaths;
if (*i == "--list" || *i == "-l") query = qList;
else if (*i == "--refs" || *i == "-r") query = qRefs;
else if (*i == "--generators" || *i == "-g") query = qGenerators;
else if (*i == "--expansion" || *i == "-e") query = qExpansion;
else throw UsageError(format("unknown flag `%1%'") % *i);
switch (query) {
case qPaths: {
case qList: {
StringSet paths;
for (Strings::iterator i = opArgs.begin();
i != opArgs.end(); i++)
@ -159,6 +160,15 @@ static void opQuery(Strings opFlags, Strings opArgs)
break;
}
case qExpansion: {
for (Strings::iterator i = opArgs.begin();
i != opArgs.end(); i++)
/* !!! should not use substitutes; this is a query,
it should not have side-effects */
cout << format("%s\n") % expandId(parseHash(*i));
break;
}
default:
abort();
}