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Add 'nix upgrade-nix' command

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This command upgrades Nix to the latest stable version by installing a
store path obtained from

  https://github.com/NixOS/nixpkgs/raw/master/nixos/modules/installer/tools/nix-fallback-paths.nix

which is the same store path that the installer at
https://nixos.org/nix/install.sh uses.

The upgrade fails if Nix is not installed in a profile (e.g. on NixOS,
or when installed outside of the Nix store).
This commit is contained in:
Eelco Dolstra 2018-01-31 16:14:47 +01:00
parent 8af911be5c
commit 6fa690291a
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GPG key ID: 8170B4726D7198DE
4 changed files with 142 additions and 1 deletions
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5
src/nix/main.cc
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@ -16,6 +16,8 @@ void chrootHelper(int argc, char * * argv);
namespace nix {
std::string programPath;
struct NixArgs : virtual MultiCommand, virtual MixCommonArgs
{
NixArgs() : MultiCommand(*RegisterCommand::commands), MixCommonArgs("nix")
@ -78,7 +80,8 @@ void mainWrapped(int argc, char * * argv)
initNix();
initGC();
string programName = baseNameOf(argv[0]);
programPath = argv[0];
string programName = baseNameOf(programPath);
{
auto legacy = (*RegisterLegacyCommand::commands)[programName];