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Add a command :b to build a derivation

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This commit is contained in:
Eelco Dolstra 2013-09-06 14:58:53 +02:00
parent ad0dd359b4
commit c6712a007f
1 changed files with 26 additions and 5 deletions
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31
nix-repl.cc
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@ -11,6 +11,8 @@
#include "eval-inline.hh"
#include "store-api.hh"
#include "common-opts.hh"
#include "get-drvs.hh"
#include "derivations.hh"
using namespace std;
using namespace nix;
@ -122,9 +124,9 @@ void NixRepl::mainLoop()
try {
processLine(removeWhitespace(line));
} catch (Error & e) {
printMsg(lvlError, e.msg());
printMsg(lvlError, "error: " + e.msg());
} catch (Interrupted & e) {
printMsg(lvlError, e.msg());
printMsg(lvlError, "error: " + e.msg());
}
std::cout << std::endl;
@ -160,10 +162,29 @@ void NixRepl::processLine(string line)
std::cout << showType(v) << std::endl;
}
else if (string(line, 0, 1) == ":") {
throw Error(format("unknown command ‘%1%’") % string(line, 0, 2));
else if (string(line, 0, 2) == ":b") {
Value v;
evalString(string(line, 2), v);
DrvInfo drvInfo;
if (!getDerivation(state, v, drvInfo, false))
throw Error("expression does not evaluation to a derivation, so I can't build it");
Path drvPath = drvInfo.queryDrvPath(state);
if (drvPath == "" || !store->isValidPath(drvPath))
throw Error("expression did not evaluate to a valid derivation");
/* We could do the build in this process using buildPaths(),
but doing it in a child makes it easier to recover from
problems / SIGINT. */
if (system(("nix-store -r " + drvPath + " > /dev/null").c_str()) == -1)
throw SysError("starting nix-store");
Derivation drv = parseDerivation(readFile(drvPath));
std::cout << "this derivation produced the following outputs:" << std::endl;
foreach (DerivationOutputs::iterator, i, drv.outputs)
std::cout << format(" %1% -> %2%") % i->first % i->second.path << std::endl;
}
else if (string(line, 0, 1) == ":")
throw Error(format("unknown command ‘%1%’") % string(line, 0, 2));
else {
Value v;
evalString(line, v);
@ -178,7 +199,7 @@ void NixRepl::addAttrsToScope(Value & attrs)
state.forceAttrs(attrs);
foreach (Bindings::iterator, i, *attrs.attrs)
addVarToScope(i->name, i->value);
printMsg(lvlError, format("added %1% variables") % attrs.attrs->size());
std::cout << format("added %1% variables") % attrs.attrs->size() << std::endl;
}