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Add "nix search" command

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This commit is contained in:
Eelco Dolstra 2017-07-17 19:02:56 +02:00
parent 3162ad5ff4
commit 90825dea51
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GPG key ID: 8170B4726D7198DE
9 changed files with 263 additions and 102 deletions
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44
src/libexpr/get-drvs.cc
View file

@ -9,7 +9,34 @@
namespace nix {
string DrvInfo::queryDrvPath()
DrvInfo::DrvInfo(EvalState & state, const string & attrPath, Bindings * attrs)
: state(&state), attrs(attrs), attrPath(attrPath)
{
}
string DrvInfo::queryName() const
{
if (name == "" && attrs) {
auto i = attrs->find(state->sName);
if (i == attrs->end()) throw TypeError("derivation name missing");
name = state->forceStringNoCtx(*i->value);
}
return name;
}
string DrvInfo::querySystem() const
{
if (system == "" && attrs) {
auto i = attrs->find(state->sSystem);
system = i == attrs->end() ? "unknown" : state->forceStringNoCtx(*i->value, *i->pos);
}
return system;
}
string DrvInfo::queryDrvPath() const
{
if (drvPath == "" && attrs) {
Bindings::iterator i = attrs->find(state->sDrvPath);
@ -20,7 +47,7 @@ string DrvInfo::queryDrvPath()
}
string DrvInfo::queryOutPath()
string DrvInfo::queryOutPath() const
{
if (outPath == "" && attrs) {
Bindings::iterator i = attrs->find(state->sOutPath);
@ -76,7 +103,7 @@ DrvInfo::Outputs DrvInfo::queryOutputs(bool onlyOutputsToInstall)
}
string DrvInfo::queryOutputName()
string DrvInfo::queryOutputName() const
{
if (outputName == "" && attrs) {
Bindings::iterator i = attrs->find(state->sOutputName);
@ -225,17 +252,12 @@ static bool getDerivation(EvalState & state, Value & v,
if (done.find(v.attrs) != done.end()) return false;
done.insert(v.attrs);
Bindings::iterator i = v.attrs->find(state.sName);
/* !!! We really would like to have a decent back trace here. */
if (i == v.attrs->end()) throw TypeError("derivation name missing");
DrvInfo drv(state, attrPath, v.attrs);
Bindings::iterator i2 = v.attrs->find(state.sSystem);
DrvInfo drv(state, state.forceStringNoCtx(*i->value), attrPath,
i2 == v.attrs->end() ? "unknown" : state.forceStringNoCtx(*i2->value, *i2->pos),
v.attrs);
drv.queryName();
drvs.push_back(drv);
return false;
} catch (AssertionError & e) {

39
src/libexpr/get-drvs.hh
View file

@ -17,31 +17,32 @@ public:
private:
EvalState * state;
string drvPath;
string outPath;
string outputName;
mutable string name;
mutable string system;
mutable string drvPath;
mutable string outPath;
mutable string outputName;
Outputs outputs;
bool failed; // set if we get an AssertionError
bool failed = false; // set if we get an AssertionError
Bindings * attrs, * meta;
Bindings * attrs = nullptr, * meta = nullptr;
Bindings * getMeta();
bool checkMeta(Value & v);
public:
string name;
string attrPath; /* path towards the derivation */
string system;
DrvInfo(EvalState & state) : state(&state), failed(false), attrs(0), meta(0) { };
DrvInfo(EvalState & state, const string & name, const string & attrPath, const string & system, Bindings * attrs)
: state(&state), failed(false), attrs(attrs), meta(0), name(name), attrPath(attrPath), system(system) { };
DrvInfo(EvalState & state) : state(&state) { };
DrvInfo(EvalState & state, const string & attrPath, Bindings * attrs);
string queryDrvPath();
string queryOutPath();
string queryOutputName();
string queryName() const;
string querySystem() const;
string queryDrvPath() const;
string queryOutPath() const;
string queryOutputName() const;
/** Return the list of outputs. The "outputs to install" are determined by `mesa.outputsToInstall`. */
Outputs queryOutputs(bool onlyOutputsToInstall = false);
@ -58,15 +59,9 @@ public:
MetaValue queryMetaInfo(EvalState & state, const string & name) const;
*/
void setDrvPath(const string & s)
{
drvPath = s;
}
void setOutPath(const string & s)
{
outPath = s;
}
void setName(const string & s) { name = s; }
void setDrvPath(const string & s) { drvPath = s; }
void setOutPath(const string & s) { outPath = s; }
void setFailed() { failed = true; };
bool hasFailed() { return failed; };

1
src/libutil/args.cc
View file

@ -66,6 +66,7 @@ void Args::printHelp(const string & programName, std::ostream & out)
std::cout << renderLabels({exp.label});
// FIXME: handle arity > 1
if (exp.arity == 0) std::cout << "...";
if (exp.optional) std::cout << "?";
}
std::cout << "\n";

4
src/libutil/args.hh
View file

@ -164,9 +164,9 @@ public:
}
/* Expect a string argument. */
void expectArg(const std::string & label, string * dest)
void expectArg(const std::string & label, string * dest, bool optional = false)
{
expectedArgs.push_back(ExpectedArg{label, 1, false, [=](Strings ss) {
expectedArgs.push_back(ExpectedArg{label, 1, optional, [=](Strings ss) {
*dest = ss.front();
}});
}

90
src/nix-env/nix-env.cc
View file

@ -186,7 +186,7 @@ static void loadDerivations(EvalState & state, Path nixExprPath,
system. */
for (DrvInfos::iterator i = elems.begin(), j; i != elems.end(); i = j) {
j = i; j++;
if (systemFilter != "*" && i->system != systemFilter)
if (systemFilter != "*" && i->querySystem() != systemFilter)
elems.erase(i);
}
}
@ -247,7 +247,7 @@ static DrvInfos filterBySelector(EvalState & state, const DrvInfos & allElems,
for (DrvInfos::const_iterator j = allElems.begin();
j != allElems.end(); ++j, ++n)
{
DrvName drvName(j->name);
DrvName drvName(j->queryName());
if (i.matches(drvName)) {
i.hits++;
matches.push_back(std::pair<DrvInfo, unsigned int>(*j, n));
@ -269,36 +269,36 @@ static DrvInfos filterBySelector(EvalState & state, const DrvInfos & allElems,
StringSet multiple;
for (auto & j : matches) {
DrvName drvName(j.first.name);
DrvName drvName(j.first.queryName());
int d = 1;
Newest::iterator k = newest.find(drvName.name);
if (k != newest.end()) {
d = j.first.system == k->second.first.system ? 0 :
j.first.system == settings.thisSystem ? 1 :
k->second.first.system == settings.thisSystem ? -1 : 0;
d = j.first.querySystem() == k->second.first.querySystem() ? 0 :
j.first.querySystem() == settings.thisSystem ? 1 :
k->second.first.querySystem() == settings.thisSystem ? -1 : 0;
if (d == 0)
d = comparePriorities(state, j.first, k->second.first);
if (d == 0)
d = compareVersions(drvName.version, DrvName(k->second.first.name).version);
d = compareVersions(drvName.version, DrvName(k->second.first.queryName()).version);
}
if (d > 0) {
newest.erase(drvName.name);
newest.insert(Newest::value_type(drvName.name, j));
multiple.erase(j.first.name);
multiple.erase(j.first.queryName());
} else if (d == 0) {
multiple.insert(j.first.name);
multiple.insert(j.first.queryName());
}
}
matches.clear();
for (auto & j : newest) {
if (multiple.find(j.second.first.name) != multiple.end())
if (multiple.find(j.second.first.queryName()) != multiple.end())
printInfo(
format("warning: there are multiple derivations named ‘%1%’; using the first one")
% j.second.first.name);
"warning: there are multiple derivations named ‘%1%’; using the first one",
j.second.first.queryName());
matches.push_back(j.second);
}
}
@ -386,7 +386,8 @@ static void queryInstSources(EvalState & state,
if (dash != string::npos)
name = string(name, dash + 1);
DrvInfo elem(state, name, "", "", 0);
DrvInfo elem(state, "", nullptr);
elem.setName(name);
if (isDerivation(path)) {
elem.setDrvPath(path);
@ -468,8 +469,8 @@ static void installDerivations(Globals & globals,
path is not the one we want (e.g., `java-front' versus
`java-front-0.9pre15899'). */
if (globals.forceName != "")
i.name = globals.forceName;
newNames.insert(DrvName(i.name).name);
i.setName(globals.forceName);
newNames.insert(DrvName(i.queryName()).name);
}
@ -484,17 +485,17 @@ static void installDerivations(Globals & globals,
DrvInfos installedElems = queryInstalled(*globals.state, profile);
for (auto & i : installedElems) {
DrvName drvName(i.name);
DrvName drvName(i.queryName());
if (!globals.preserveInstalled &&
newNames.find(drvName.name) != newNames.end() &&
!keep(i))
printInfo(format("replacing old ‘%1%’") % i.name);
printInfo("replacing old ‘%s’", i.queryName());
else
allElems.push_back(i);
}
for (auto & i : newElems)
printInfo(format("installing ‘%1%’") % i.name);
printInfo("installing ‘%s’", i.queryName());
}
printMissing(*globals.state, newElems);
@ -548,7 +549,7 @@ static void upgradeDerivations(Globals & globals,
/* Go through all installed derivations. */
DrvInfos newElems;
for (auto & i : installedElems) {
DrvName drvName(i.name);
DrvName drvName(i.queryName());
try {
@ -569,7 +570,7 @@ static void upgradeDerivations(Globals & globals,
for (auto j = availElems.begin(); j != availElems.end(); ++j) {
if (comparePriorities(*globals.state, i, *j) > 0)
continue;
DrvName newName(j->name);
DrvName newName(j->queryName());
if (newName.name == drvName.name) {
int d = compareVersions(drvName.version, newName.version);
if ((upgradeType == utLt && d < 0) ||
@ -596,14 +597,13 @@ static void upgradeDerivations(Globals & globals,
{
const char * action = compareVersions(drvName.version, bestVersion) <= 0
? "upgrading" : "downgrading";
printInfo(
format("%1% ‘%2%’ to ‘%3%’")
% action % i.name % bestElem->name);
printInfo("%1% ‘%2%’ to ‘%3%’",
action, i.queryName(), bestElem->queryName());
newElems.push_back(*bestElem);
} else newElems.push_back(i);
} catch (Error & e) {
e.addPrefix(format("while trying to find an upgrade for ‘%1%’:\n") % i.name);
e.addPrefix(fmt("while trying to find an upgrade for ‘%s’:\n", i.queryName()));
throw;
}
}
@ -663,10 +663,10 @@ static void opSetFlag(Globals & globals, Strings opFlags, Strings opArgs)
/* Update all matching derivations. */
for (auto & i : installedElems) {
DrvName drvName(i.name);
DrvName drvName(i.queryName());
for (auto & j : selectors)
if (j.matches(drvName)) {
printInfo(format("setting flag on ‘%1%’") % i.name);
printInfo("setting flag on ‘%1%’", i.queryName());
j.hits++;
setMetaFlag(*globals.state, i, flagName, flagValue);
break;
@ -702,7 +702,7 @@ static void opSet(Globals & globals, Strings opFlags, Strings opArgs)
DrvInfo & drv(elems.front());
if (globals.forceName != "")
drv.name = globals.forceName;
drv.setName(globals.forceName);
if (drv.queryDrvPath() != "") {
PathSet paths = {drv.queryDrvPath()};
@ -732,7 +732,7 @@ static void uninstallDerivations(Globals & globals, Strings & selectors,
DrvInfos newElems;
for (auto & i : installedElems) {
DrvName drvName(i.name);
DrvName drvName(i.queryName());
bool found = false;
for (auto & j : selectors)
/* !!! the repeated calls to followLinksToStorePath()
@ -740,7 +740,7 @@ static void uninstallDerivations(Globals & globals, Strings & selectors,
if ((isPath(j) && i.queryOutPath() == globals.state->store->followLinksToStorePath(j))
|| DrvName(j).matches(drvName))
{
printInfo(format("uninstalling ‘%1%’") % i.name);
printInfo("uninstalling ‘%s’", i.queryName());
found = true;
break;
}
@ -771,9 +771,11 @@ static bool cmpChars(char a, char b)
static bool cmpElemByName(const DrvInfo & a, const DrvInfo & b)
{
auto a_name = a.queryName();
auto b_name = b.queryName();
return lexicographical_compare(
a.name.begin(), a.name.end(),
b.name.begin(), b.name.end(), cmpChars);
a_name.begin(), a_name.end(),
b_name.begin(), b_name.end(), cmpChars);
}
@ -822,13 +824,13 @@ typedef enum { cvLess, cvEqual, cvGreater, cvUnavail } VersionDiff;
static VersionDiff compareVersionAgainstSet(
const DrvInfo & elem, const DrvInfos & elems, string & version)
{
DrvName name(elem.name);
DrvName name(elem.queryName());
VersionDiff diff = cvUnavail;
version = "?";
for (auto & i : elems) {
DrvName name2(i.name);
DrvName name2(i.queryName());
if (name.name == name2.name) {
int d = compareVersions(name.version, name2.version);
if (d < 0) {
@ -857,8 +859,8 @@ static void queryJSON(Globals & globals, vector<DrvInfo> & elems)
for (auto & i : elems) {
JSONObject pkgObj = topObj.object(i.attrPath);
pkgObj.attr("name", i.name);
pkgObj.attr("system", i.system);
pkgObj.attr("name", i.queryName());
pkgObj.attr("system", i.querySystem());
JSONObject metaObj = pkgObj.object("meta");
StringSet metaNames = i.queryMetaNames();
@ -866,7 +868,7 @@ static void queryJSON(Globals & globals, vector<DrvInfo> & elems)
auto placeholder = metaObj.placeholder(j);
Value * v = i.queryMeta(j);
if (!v) {
printError(format("derivation ‘%1%’ has invalid meta attribute ‘%2%’") % i.name % j);
printError("derivation ‘%s’ has invalid meta attribute ‘%s’", i.queryName(), j);
placeholder.write(nullptr);
} else {
PathSet context;
@ -963,7 +965,7 @@ static void opQuery(Globals & globals, Strings opFlags, Strings opArgs)
try {
paths.insert(i.queryOutPath());
} catch (AssertionError & e) {
printMsg(lvlTalkative, format("skipping derivation named ‘%1%’ which gives an assertion failure") % i.name);
printMsg(lvlTalkative, "skipping derivation named ‘%s’ which gives an assertion failure", i.queryName());
i.setFailed();
}
validPaths = globals.state->store->queryValidPaths(paths);
@ -1024,9 +1026,9 @@ static void opQuery(Globals & globals, Strings opFlags, Strings opArgs)
columns.push_back(i.attrPath);
if (xmlOutput)
attrs["name"] = i.name;
attrs["name"] = i.queryName();
else if (printName)
columns.push_back(i.name);
columns.push_back(i.queryName());
if (compareVersions) {
/* Compare this element against the versions of the
@ -1059,10 +1061,10 @@ static void opQuery(Globals & globals, Strings opFlags, Strings opArgs)
}
if (xmlOutput) {
if (i.system != "") attrs["system"] = i.system;
if (i.querySystem() != "") attrs["system"] = i.querySystem();
}
else if (printSystem)
columns.push_back(i.system);
columns.push_back(i.querySystem());
if (printDrvPath) {
string drvPath = i.queryDrvPath();
@ -1110,7 +1112,7 @@ static void opQuery(Globals & globals, Strings opFlags, Strings opArgs)
attrs2["name"] = j;
Value * v = i.queryMeta(j);
if (!v)
printError(format("derivation ‘%1%’ has invalid meta attribute ‘%2%’") % i.name % j);
printError("derivation ‘%s’ has invalid meta attribute ‘%s’", i.queryName(), j);
else {
if (v->type == tString) {
attrs2["type"] = "string";
@ -1161,9 +1163,9 @@ static void opQuery(Globals & globals, Strings opFlags, Strings opArgs)
cout.flush();
} catch (AssertionError & e) {
printMsg(lvlTalkative, format("skipping derivation named ‘%1%’ which gives an assertion failure") % i.name);
printMsg(lvlTalkative, "skipping derivation named ‘%1%’ which gives an assertion failure", i.queryName());
} catch (Error & e) {
e.addPrefix(format("while querying the derivation named ‘%1%’:\n") % i.name);
e.addPrefix(fmt("while querying the derivation named ‘%1%’:\n", i.queryName()));
throw;
}
}

7
src/nix-env/user-env.cc
View file

@ -56,9 +56,10 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
state.mkAttrs(v, 16);
mkString(*state.allocAttr(v, state.sType), "derivation");
mkString(*state.allocAttr(v, state.sName), i.name);
if (!i.system.empty())
mkString(*state.allocAttr(v, state.sSystem), i.system);
mkString(*state.allocAttr(v, state.sName), i.queryName());
auto system = i.querySystem();
if (!system.empty())
mkString(*state.allocAttr(v, state.sSystem), system);
mkString(*state.allocAttr(v, state.sOutPath), i.queryOutPath());
if (drvPath != "")
mkString(*state.allocAttr(v, state.sDrvPath), i.queryDrvPath());

34
src/nix/command.hh
View file

@ -62,17 +62,13 @@ struct Installable
}
};
/* A command that operates on a list of "installables", which can be
store paths, attribute paths, Nix expressions, etc. */
struct InstallablesCommand : virtual Args, StoreCommand
struct SourceExprCommand : virtual Args, StoreCommand
{
std::vector<std::shared_ptr<Installable>> installables;
Path file;
InstallablesCommand()
SourceExprCommand()
{
mkFlag('f', "file", "file", "evaluate FILE rather than the default", &file);
expectArgs("installables", &_installables);
}
/* Return a value representing the Nix expression from which we
@ -81,14 +77,32 @@ struct InstallablesCommand : virtual Args, StoreCommand
= import ...; bla = import ...; }’. */
Value * getSourceExpr(EvalState & state);
ref<EvalState> getEvalState();
private:
std::shared_ptr<EvalState> evalState;
Value * vSourceExpr = 0;
};
/* A command that operates on a list of "installables", which can be
store paths, attribute paths, Nix expressions, etc. */
struct InstallablesCommand : virtual Args, SourceExprCommand
{
std::vector<std::shared_ptr<Installable>> installables;
InstallablesCommand()
{
expectArgs("installables", &_installables);
}
std::vector<std::shared_ptr<Installable>> parseInstallables(ref<Store> store, Strings ss);
enum ToStorePathsMode { Build, NoBuild, DryRun };
PathSet toStorePaths(ref<Store> store, ToStorePathsMode mode);
ref<EvalState> getEvalState();
void prepare() override;
virtual bool useDefaultInstallables() { return true; }
@ -96,10 +110,6 @@ struct InstallablesCommand : virtual Args, StoreCommand
private:
Strings _installables;
std::shared_ptr<EvalState> evalState;
Value * vSourceExpr = 0;
};
/* A command that operates on zero or more store paths. */

16
src/nix/installables.cc
View file

@ -12,7 +12,7 @@
namespace nix {
Value * InstallablesCommand::getSourceExpr(EvalState & state)
Value * SourceExprCommand::getSourceExpr(EvalState & state)
{
if (vSourceExpr) return vSourceExpr;
@ -59,6 +59,13 @@ Value * InstallablesCommand::getSourceExpr(EvalState & state)
return vSourceExpr;
}
ref<EvalState> SourceExprCommand::getEvalState()
{
if (!evalState)
evalState = std::make_shared<EvalState>(Strings{}, getStore());
return ref<EvalState>(evalState);
}
struct InstallableStoreDrv : Installable
{
Path storePath;
@ -237,13 +244,6 @@ PathSet InstallablesCommand::toStorePaths(ref<Store> store, ToStorePathsMode mod
return outPaths;
}
ref<EvalState> InstallablesCommand::getEvalState()
{
if (!evalState)
evalState = std::make_shared<EvalState>(Strings{}, getStore());
return ref<EvalState>(evalState);
}
void InstallablesCommand::prepare()
{
installables = parseInstallables(getStore(), _installables);

130
src/nix/search.cc Normal file
View file

@ -0,0 +1,130 @@
#include "command.hh"
#include "globals.hh"
#include "eval.hh"
#include "eval-inline.hh"
#include "names.hh"
#include "get-drvs.hh"
#include <regex>
using namespace nix;
std::string hilite(const std::string & s, const std::smatch & m)
{
return
m.empty()
? s
: std::string(m.prefix())
+ ANSI_RED + std::string(m.str()) + ANSI_NORMAL
+ std::string(m.suffix());
}
struct CmdSearch : SourceExprCommand
{
std::string re;
CmdSearch()
{
expectArg("regex", &re, true);
}
std::string name() override
{
return "search";
}
std::string description() override
{
return "query available packages";
}
void run(ref<Store> store) override
{
settings.readOnlyMode = true;
std::regex regex(re, std::regex::extended | std::regex::icase);
auto state = getEvalState();
std::function<void(Value *, std::string, bool)> doExpr;
bool first = true;
doExpr = [&](Value * v, std::string attrPath, bool toplevel) {
debug("at attribute ‘%s’", attrPath);
try {
state->forceValue(*v);
if (v->type == tLambda && toplevel) {
Value * v2 = state->allocValue();
state->autoCallFunction(*state->allocBindings(1), *v, *v2);
v = v2;
state->forceValue(*v);
}
if (state->isDerivation(*v)) {
DrvInfo drv(*state, attrPath, v->attrs);
DrvName parsed(drv.queryName());
std::smatch attrPathMatch;
std::regex_search(attrPath, attrPathMatch, regex);
auto name = parsed.name;
std::smatch nameMatch;
std::regex_search(name, nameMatch, regex);
std::string description = drv.queryMetaString("description");
std::replace(description.begin(), description.end(), '\n', ' ');
std::smatch descriptionMatch;
std::regex_search(description, descriptionMatch, regex);
if (!attrPathMatch.empty()
|| !nameMatch.empty()
|| !descriptionMatch.empty())
{
if (!first) std::cout << "\n";
first = false;
std::cout << fmt(
"Attribute name: %s\n"
"Package name: %s\n"
"Version: %s\n"
"Description: %s\n",
hilite(attrPath, attrPathMatch),
hilite(name, nameMatch),
parsed.version,
hilite(description, descriptionMatch));
}
}
else if (v->type == tAttrs) {
if (!toplevel) {
auto attrs = v->attrs;
Bindings::iterator j = attrs->find(state->symbols.create("recurseForDerivations"));
if (j == attrs->end() || !state->forceBool(*j->value, *j->pos)) return;
}
Bindings::iterator j = v->attrs->find(state->symbols.create("_toplevel"));
bool toplevel2 = j != v->attrs->end() && state->forceBool(*j->value, *j->pos);
for (auto & i : *v->attrs) {
doExpr(i.value,
attrPath == "" ? (std::string) i.name : attrPath + "." + (std::string) i.name,
toplevel2);
}
}
} catch (AssertionError & e) {
}
};
doExpr(getSourceExpr(*state), "", true);
}
};
static RegisterCommand r1(make_ref<CmdSearch>());