forked from lix-project/lix
85c8be6286
This was useful for an experiment with building Nix as a single compilation unit. It's not very useful otherwise but also doesn't hurt...
58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
#include "command.hh"
|
|
#include "shared.hh"
|
|
#include "eval.hh"
|
|
#include "attr-path.hh"
|
|
#include "progress-bar.hh"
|
|
|
|
#include <unistd.h>
|
|
|
|
using namespace nix;
|
|
|
|
struct CmdEdit : InstallableCommand
|
|
{
|
|
std::string description() override
|
|
{
|
|
return "open the Nix expression of a Nix package in $EDITOR";
|
|
}
|
|
|
|
Examples examples() override
|
|
{
|
|
return {
|
|
Example{
|
|
"To open the Nix expression of the GNU Hello package:",
|
|
"nix edit nixpkgs#hello"
|
|
},
|
|
};
|
|
}
|
|
|
|
Category category() override { return catSecondary; }
|
|
|
|
void run(ref<Store> store) override
|
|
{
|
|
auto state = getEvalState();
|
|
|
|
auto [v, pos] = installable->toValue(*state);
|
|
|
|
try {
|
|
pos = findDerivationFilename(*state, *v, installable->what());
|
|
} catch (NoPositionInfo &) {
|
|
}
|
|
|
|
if (pos == noPos)
|
|
throw Error("cannot find position information for '%s", installable->what());
|
|
|
|
stopProgressBar();
|
|
|
|
auto args = editorFor(pos);
|
|
|
|
restoreSignals();
|
|
execvp(args.front().c_str(), stringsToCharPtrs(args).data());
|
|
|
|
std::string command;
|
|
for (const auto &arg : args) command += " '" + arg + "'";
|
|
throw SysError("cannot run command%s", command);
|
|
}
|
|
};
|
|
|
|
static auto rCmdEdit = registerCommand<CmdEdit>("edit");
|