libutil/args: warn on unknown settings after parsing all flags

Upstream change: https://github.com/NixOS/nix/pull/10701

Change-Id: Icf271df57ec529dd8c64667d1ef9f6dbf02d33d3
This commit is contained in:
Cole Helbling 2024-05-14 12:13:40 -07:00 committed by Maximilian Bosch
parent 218630a241
commit 031d924116
5 changed files with 48 additions and 7 deletions

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@ -36,6 +36,10 @@ artemist:
display_name: Artemis Tosini
forgejo: artemist
cole-h:
display_name: Cole Helbling
github: cole-h
edolstra:
display_name: Eelco Dolstra
github: edolstra

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@ -0,0 +1,30 @@
---
synopsis: Warn on unknown settings anywhere in the command line
prs: 10701
credits: [cole-h]
category: Improvements
---
All `nix` commands will now properly warn when an unknown option is specified anywhere in the command line.
Before:
```console
$ nix-instantiate --option foobar baz --expr '{}'
warning: unknown setting 'foobar'
$ nix-instantiate '{}' --option foobar baz --expr
$ nix eval --expr '{}' --option foobar baz
{ }
```
After:
```console
$ nix-instantiate --option foobar baz --expr '{}'
warning: unknown setting 'foobar'
$ nix-instantiate '{}' --option foobar baz --expr
warning: unknown setting 'foobar'
$ nix eval --expr '{}' --option foobar baz
warning: unknown setting 'foobar'
{ }
```

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@ -93,7 +93,6 @@ void RootArgs::parseCmdline(const Strings & _cmdline)
verbosity = lvlError;
}
bool argsSeen = false;
for (auto pos = cmdline.begin(); pos != cmdline.end(); ) {
auto arg = *pos;
@ -122,10 +121,6 @@ void RootArgs::parseCmdline(const Strings & _cmdline)
throw UsageError("unrecognised flag '%1%'", arg);
}
else {
if (!argsSeen) {
argsSeen = true;
initialFlagsProcessed();
}
pos = rewriteArgs(cmdline, pos);
pendingArgs.push_back(*pos++);
if (processArgs(pendingArgs, false))
@ -135,7 +130,6 @@ void RootArgs::parseCmdline(const Strings & _cmdline)
processArgs(pendingArgs, true);
if (!argsSeen)
initialFlagsProcessed();
/* Now that we are done parsing, make sure that any experimental

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@ -51,3 +51,7 @@ mkdir -p $TEST_ROOT/xyzzy $TEST_ROOT/foo
ln -sfn ../xyzzy $TEST_ROOT/foo/bar
printf 123 > $TEST_ROOT/xyzzy/default.nix
[[ $(nix eval --impure --expr "import $TEST_ROOT/foo/bar") = 123 ]]
# Test that unknown settings are warned about
out="$(expectStderr 0 nix eval --option foobar baz --expr '""' --raw)"
[[ "$(echo "$out" | grep foobar | wc -l)" = 1 ]]

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@ -30,3 +30,12 @@ expectStderr 1 nix-instantiate --eval -E '[]' -A 'x' | grepQuiet "should be a se
expectStderr 1 nix-instantiate --eval -E '{}' -A '1' | grepQuiet "should be a list"
expectStderr 1 nix-instantiate --eval -E '{}' -A '.' | grepQuiet "empty attribute name"
expectStderr 1 nix-instantiate --eval -E '[]' -A '1' | grepQuiet "out of range"
# Unknown setting warning
# NOTE(cole-h): behavior is different depending on the order, which is why we test an unknown option
# before and after the `'{}'`!
out="$(expectStderr 0 nix-instantiate --option foobar baz --expr '{}')"
[[ "$(echo "$out" | grep foobar | wc -l)" = 1 ]]
out="$(expectStderr 0 nix-instantiate '{}' --option foobar baz --expr )"
[[ "$(echo "$out" | grep foobar | wc -l)" = 1 ]]