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Merge pull request #19 from tsion/x-command

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Add :u command which works like `nix-shell -p`.
This commit is contained in:
Eelco Dolstra 2016-03-07 15:52:02 +01:00
commit e37bca136e
1 changed files with 24 additions and 7 deletions
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31
nix-repl.cc
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@ -39,6 +39,7 @@ struct NixRepl
void mainLoop(const Strings & files);
void completePrefix(string prefix);
bool getLine(string & input, const char * prompt);
Path getDerivationPath(Value & v);
bool processLine(string line);
void loadFile(const Path & path);
void initEnv();
@ -300,6 +301,17 @@ bool isVarName(const string & s)
}
Path NixRepl::getDerivationPath(Value & v) {
DrvInfo drvInfo(state);
if (!getDerivation(state, v, drvInfo, false))
throw Error("expression does not evaluate to a derivation, so I can't build it");
Path drvPath = drvInfo.queryDrvPath();
if (drvPath == "" || !state.store->isValidPath(drvPath))
throw Error("expression did not evaluate to a valid derivation");
return drvPath;
}
bool NixRepl::processLine(string line)
{
if (line == "") return true;
@ -327,7 +339,8 @@ bool NixRepl::processLine(string line)
<< " :q Exit nix-repl\n"
<< " :r Reload all files\n"
<< " :s <expr> Build dependencies of derivation, then start nix-shell\n"
<< " :t <expr> Describe result of evaluation\n";
<< " :t <expr> Describe result of evaluation\n"
<< " :u <expr> Build derivation, then start nix-shell\n";
}
else if (command == ":a" || command == ":add") {
@ -350,17 +363,21 @@ bool NixRepl::processLine(string line)
Value v;
evalString(arg, v);
std::cout << showType(v) << std::endl;
} else if (command == ":u") {
Value v, f, result;
evalString(arg, v);
evalString("drv: (import <nixpkgs> {}).runCommand \"shell\" { buildInputs = [ drv ]; } \"\"", f);
state.callFunction(f, v, result, Pos());
Path drvPath = getDerivationPath(result);
runProgram("nix-shell", Strings{drvPath});
}
else if (command == ":b" || command == ":i" || command == ":s") {
Value v;
evalString(arg, v);
DrvInfo drvInfo(state);
if (!getDerivation(state, v, drvInfo, false))
throw Error("expression does not evaluate to a derivation, so I can't build it");
Path drvPath = drvInfo.queryDrvPath();
if (drvPath == "" || !state.store->isValidPath(drvPath))
throw Error("expression did not evaluate to a valid derivation");
Path drvPath = getDerivationPath(v);
if (command == ":b") {
/* We could do the build in this process using buildPaths(),