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Imply --offline during tab completion

Browse Source 
Previously, if you don't have Internet connectivity, tab completion
might try to fetch the flake registry, e.g.

  $ NIX_GET_COMPLETIONS=4 nix build -vvvvv --offline /home/eelco/De
  evaluating file '<nix/derivation-internal.nix>'
  downloading 'https://channels.nixos.org/flake-registry.json'...
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; retrying in 294 ms
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; retrying in 541 ms
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; retrying in 1230 ms
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; retrying in 2285 ms
  warning: error: unable to download 'https://channels.nixos.org/flake-registry.json': Could not resolve hostname (6) Could not resolve host: channels.nixos.org; using cached version
This commit is contained in:
Eelco Dolstra 2025-03-03 13:10:08 +01:00
parent efbd4c1ebb
commit 13812a82b6
2 changed files with 24 additions and 13 deletions
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3
src/libutil/args.cc
View File

@ -236,7 +236,8 @@ void ParseQuoted::operator()(std::shared_ptr<Parser> &state, Strings & r) {
assert(false);
}
Strings parseShebangContent(std::string_view s) {
Strings parseShebangContent(std::string_view s)
{
Strings result;
std::shared_ptr<Parser> parserState(std::make_shared<ParseUnquoted>(ParseUnquoted(s)));

34
src/nix/main.cc
View File

@ -92,6 +92,19 @@ static bool haveInternet()
#endif
}
static void disableNet()
{
// FIXME: should check for command line overrides only.
if (!settings.useSubstitutes.overridden)
settings.useSubstitutes = false;
if (!settings.tarballTtl.overridden)
settings.tarballTtl = std::numeric_limits<unsigned int>::max();
if (!fileTransferSettings.tries.overridden)
fileTransferSettings.tries = 0;
if (!fileTransferSettings.connectTimeout.overridden)
fileTransferSettings.connectTimeout = 1;
}
std::string programPath;
struct NixArgs : virtual MultiCommand, virtual MixCommonArgs, virtual RootArgs
@ -479,10 +492,16 @@ void mainWrapped(int argc, char * * argv)
}
});
if (getEnv("NIX_GET_COMPLETIONS"))
/* Avoid fetching stuff during tab completion. We have to this
early because we haven't checked `haveInternet()` yet
(below). */
disableNet();
try {
auto isNixCommand = std::regex_search(programName, std::regex("nix$"));
auto allowShebang = isNixCommand && argc > 1;
args.parseCmdline(argvToStrings(argc, argv),allowShebang);
args.parseCmdline(argvToStrings(argc, argv), allowShebang);
} catch (UsageError &) {
if (!args.helpRequested && !args.completions) throw;
}
@ -519,17 +538,8 @@ void mainWrapped(int argc, char * * argv)
args.useNet = false;
}
if (!args.useNet) {
// FIXME: should check for command line overrides only.
if (!settings.useSubstitutes.overridden)
settings.useSubstitutes = false;
if (!settings.tarballTtl.overridden)
settings.tarballTtl = std::numeric_limits<unsigned int>::max();
if (!fileTransferSettings.tries.overridden)
fileTransferSettings.tries = 0;
if (!fileTransferSettings.connectTimeout.overridden)
fileTransferSettings.connectTimeout = 1;
}
if (!args.useNet)
disableNet();
if (args.refresh) {
settings.tarballTtl = 0;