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* nix-env -e: support uninstalling by path, so that one can say

Browse source 
$ nix-env -e $(which firefox)

  or

    $ nix-env -e /nix/store/nywzlygrkfcgz7dfmhm5xixlx1l0m60v-pan-0.132

* nix-env -i: if an argument contains a slash anywhere, treat it as a
  path and follow it through symlinks into the Nix store.  This allows
  things like

    $ nix-build -A firefox
    $ nix-env -i ./result

* nix-env -q/-i/-e: don't complain when the `*' selector doesn't match
  anything.  In particular, `nix-env -q \*' doesn't fail anymore on an
  empty profile.
This commit is contained in:
Eelco Dolstra 2007-11-29 16:18:24 +00:00
parent 12d0a1eb75
commit 633518628f
7 changed files with 81 additions and 50 deletions
Download patch file Download diff file Expand all files Collapse all files

42
src/nix-env/nix-env.cc
View file

@ -410,7 +410,7 @@ static DrvInfos filterBySelector(EvalState & state, const DrvInfos & allElems,
/* Check that all selectors have been used. */
for (DrvNames::iterator i = selectors.begin();
i != selectors.end(); ++i)
if (i->hits == 0)
if (i->hits == 0 && i->fullName != "*")
throw Error(format("selector `%1%' matches no derivations")
% i->fullName);
@ -418,12 +418,18 @@ static DrvInfos filterBySelector(EvalState & state, const DrvInfos & allElems,
}
static bool isPath(const string & s)
{
return s.find('/') != string::npos;
}
static void queryInstSources(EvalState & state,
const InstallSourceInfo & instSource, const Strings & args,
DrvInfos & elems, bool newestOnly)
{
InstallSourceType type = instSource.type;
if (type == srcUnknown && args.size() > 0 && args.front()[0] == '/')
if (type == srcUnknown && args.size() > 0 && isPath(args.front()))
type = srcStorePaths;
switch (type) {
@ -475,23 +481,23 @@ static void queryInstSources(EvalState & state,
for (Strings::const_iterator i = args.begin();
i != args.end(); ++i)
{
assertStorePath(*i);
Path path = followLinksToStorePath(*i);
DrvInfo elem;
elem.attrs = boost::shared_ptr<ATermMap>(new ATermMap(0)); /* ugh... */
string name = baseNameOf(*i);
string name = baseNameOf(path);
string::size_type dash = name.find('-');
if (dash != string::npos)
name = string(name, dash + 1);
if (isDerivation(*i)) {
elem.setDrvPath(*i);
elem.setOutPath(findOutput(derivationFromPath(*i), "out"));
if (isDerivation(path)) {
elem.setDrvPath(path);
elem.setOutPath(findOutput(derivationFromPath(path), "out"));
if (name.size() >= drvExtension.size() &&
string(name, name.size() - drvExtension.size()) == drvExtension)
name = string(name, 0, name.size() - drvExtension.size());
}
else elem.setOutPath(*i);
else elem.setOutPath(path);
elem.name = name;
@ -811,7 +817,7 @@ static void opSet(Globals & globals,
}
static void uninstallDerivations(Globals & globals, DrvNames & selectors,
static void uninstallDerivations(Globals & globals, Strings & selectors,
Path & profile)
{
PathLocks lock;
@ -824,11 +830,13 @@ static void uninstallDerivations(Globals & globals, DrvNames & selectors,
{
DrvName drvName(i->name);
bool found = false;
for (DrvNames::iterator j = selectors.begin();
j != selectors.end(); ++j)
if (j->matches(drvName)) {
printMsg(lvlInfo,
format("uninstalling `%1%'") % i->name);
for (Strings::iterator j = selectors.begin(); j != selectors.end(); ++j)
/* !!! the repeated calls to followLinksToStorePath() are
expensive, should pre-compute them. */
if ((isPath(*j) && i->queryOutPath(globals.state) == followLinksToStorePath(*j))
|| DrvName(*j).matches(drvName))
{
printMsg(lvlInfo, format("uninstalling `%1%'") % i->name);
found = true;
break;
}
@ -847,11 +855,7 @@ static void opUninstall(Globals & globals,
{
if (opFlags.size() > 0)
throw UsageError(format("unknown flag `%1%'") % opFlags.front());
DrvNames drvNames = drvNamesFromArgs(opArgs);
uninstallDerivations(globals, drvNames,
globals.profile);
uninstallDerivations(globals, opArgs, globals.profile);
}