forked from lix-project/lix
82 lines
2.1 KiB
C++
82 lines
2.1 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 name() override
|
|
{
|
|
return "edit";
|
|
}
|
|
|
|
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"
|
|
},
|
|
};
|
|
}
|
|
|
|
void run(ref<Store> store) override
|
|
{
|
|
auto state = getEvalState();
|
|
|
|
auto v = installable->toValue(*state);
|
|
|
|
Value * v2;
|
|
try {
|
|
auto dummyArgs = state->allocBindings(0);
|
|
v2 = findAlongAttrPath(*state, "meta.position", *dummyArgs, *v);
|
|
} catch (Error &) {
|
|
throw Error("package '%s' has no source location information", installable->what());
|
|
}
|
|
|
|
auto pos = state->forceString(*v2);
|
|
debug("position is %s", pos);
|
|
|
|
auto colon = pos.rfind(':');
|
|
if (colon == std::string::npos)
|
|
throw Error("cannot parse meta.position attribute '%s'", pos);
|
|
|
|
std::string filename(pos, 0, colon);
|
|
int lineno;
|
|
try {
|
|
lineno = std::stoi(std::string(pos, colon + 1));
|
|
} catch (std::invalid_argument e) {
|
|
throw Error("cannot parse line number '%s'", pos);
|
|
}
|
|
|
|
auto editor = getEnv("EDITOR", "cat");
|
|
|
|
auto args = tokenizeString<Strings>(editor);
|
|
|
|
if (editor.find("emacs") != std::string::npos ||
|
|
editor.find("nano") != std::string::npos ||
|
|
editor.find("vim") != std::string::npos)
|
|
args.push_back(fmt("+%d", lineno));
|
|
|
|
args.push_back(filename);
|
|
|
|
stopProgressBar();
|
|
|
|
execvp(args.front().c_str(), stringsToCharPtrs(args).data());
|
|
|
|
throw SysError("cannot run editor '%s'", editor);
|
|
}
|
|
};
|
|
|
|
static RegisterCommand r1(make_ref<CmdEdit>());
|