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nix3-upgrade-nix: always use the /new/ nix-env to perform the installation

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Fixes #411.

Change-Id: I8d87c0e9295deea26ff33234e15ee33cc68ab303
This commit is contained in:
Qyriad
2024-07-15 15:26:53 -06:00
parent d9c51ec4e5
commit ae7eab49b9
2 changed files with 23 additions and 24 deletions
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src/nix/upgrade-nix.cc
+16 -15
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@@ -97,12 +97,19 @@ struct CmdUpgradeNix : MixDryRun, EvalCommand
store->ensurePath(storePath);
}
// {profileDir}/bin/nix-env is a symlink to {profileDir}/bin/nix, which *then*
// is a symlink to /nix/store/meow-nix/bin/nix.
// We want /nix/store/meow-nix/bin/nix-env.
Path const oldNixInStore = realPath(canonProfileDir + "/bin/nix");
Path const oldNixEnv = dirOf(oldNixInStore) + "/nix-env";
Path const newNixEnv = store->printStorePath(storePath) + "/bin/nix-env";
{
Activity act(*logger, lvlInfo, actUnknown, fmt("verifying that '%s' works...", store->printStorePath(storePath)));
auto program = store->printStorePath(storePath) + "/bin/nix-env";
auto s = runProgram(program, false, {"--version"});
auto s = runProgram(newNixEnv, false, {"--version"});
if (s.find("Nix") == std::string::npos)
throw Error("could not verify that '%s' works", program);
throw Error("could not verify that '%s' works", newNixEnv);
}
logger->pause();
@@ -110,23 +117,17 @@ struct CmdUpgradeNix : MixDryRun, EvalCommand
auto const fullStorePath = store->printStorePath(storePath);
if (pathExists(canonProfileDir + "/manifest.nix")) {
// {settings.nixBinDir}/nix-env is a symlink to a {settings.nixBinDir}/nix, which *then*
// is a symlink to /nix/store/meow-nix/bin/nix. We want /nix/store/meow-nix/bin/nix-env.
Path const nixInStore = canonPath(settings.nixBinDir + "/nix-env", true);
Path const nixEnvCmd = dirOf(nixInStore) + "/nix-env";
// First remove the existing Nix, then use that Nix by absolute path to
// First remove the existing Nix, then use the *new* Nix by absolute path to
// install the new one, in case the new and old versions aren't considered
// to be "the same package" by nix-env's logic (e.g., if their pnames differ).
Strings removeArgs = {
"--uninstall",
nixEnvCmd,
oldNixEnv,
"--profile",
this->profileDir,
};
printTalkative("running %s %s", nixEnvCmd, concatStringsSep(" ", removeArgs));
runProgram(nixEnvCmd, false, removeArgs);
printTalkative("running %s %s", newNixEnv, concatStringsSep(" ", removeArgs));
runProgram(newNixEnv, false, removeArgs);
Strings upgradeArgs = {
"--profile",
@@ -136,8 +137,8 @@ struct CmdUpgradeNix : MixDryRun, EvalCommand
"--no-sandbox",
};
printTalkative("running %s %s", nixEnvCmd, concatStringsSep(" ", upgradeArgs));
runProgram(nixEnvCmd, false, upgradeArgs);
printTalkative("running %s %s", newNixEnv, concatStringsSep(" ", upgradeArgs));
runProgram(newNixEnv, false, upgradeArgs);
} else if (pathExists(canonProfileDir + "/manifest.json")) {
this->upgradeNewStyleProfile(store, storePath);
} else {