forked from lix-project/lix
c998e0172f
These methods would previously fail on the other `Installable`s, so moving them to this class is more correct as to where they actually work. Additionally, a `InstallableValueCommand` is created to make it easier (or rather no worse than before) to write commands that just work on `InstallableValue`s. Besides being a cleanup to avoid failing default methods, this gets us closer to https://github.com/NixOS/rfcs/pull/134.
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
#include "command-installable-value.hh"
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#include "shared.hh"
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#include "eval.hh"
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#include "attr-path.hh"
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#include "progress-bar.hh"
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#include "editor-for.hh"
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#include <unistd.h>
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using namespace nix;
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struct CmdEdit : InstallableValueCommand
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{
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std::string description() override
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{
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return "open the Nix expression of a Nix package in $EDITOR";
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}
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std::string doc() override
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{
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return
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#include "edit.md"
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;
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}
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Category category() override { return catSecondary; }
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void run(ref<Store> store, ref<InstallableValue> installable) override
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{
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auto state = getEvalState();
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const auto [file, line] = [&] {
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auto [v, pos] = installable->toValue(*state);
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try {
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return findPackageFilename(*state, *v, installable->what());
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} catch (NoPositionInfo &) {
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throw Error("cannot find position information for '%s", installable->what());
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}
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}();
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stopProgressBar();
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auto args = editorFor(file, line);
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restoreProcessContext();
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execvp(args.front().c_str(), stringsToCharPtrs(args).data());
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std::string command;
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for (const auto &arg : args) command += " '" + arg + "'";
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throw SysError("cannot run command%s", command);
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}
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};
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static auto rCmdEdit = registerCommand<CmdEdit>("edit");
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