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Also display some suggestions for invalid formal arguments

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```console
$ nix eval --expr '({ foo ? 1 }: foo) { fob = 2; }'
error: anonymous function at (string):1:2 called with unexpected argument 'fob'

       at «string»:1:1:

            1| ({ foo ? 1 }: foo) { fob = 2; }
             | ^
       Did you mean foo?
```

Not that because Nix will first check for _missing_ arguments before
checking for extra arguments, `({ foo }: foo) { fob = 1; }` will
complain about the missing `foo` argument (rather than extra `fob`) and
so won’t display a suggestion.
This commit is contained in:
regnat 2022-03-08 16:20:01 +01:00
parent 33b7514035
commit f6078e474d
2 changed files with 25 additions and 2 deletions
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4
tests/suggestions.sh
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@ -38,3 +38,7 @@ NIX_BUILD_STDERR_WITH_NO_CLOSE_SUGGESTION=$(! nix build .\#bar 2>&1 1>/dev/null)
NIX_EVAL_STDERR_WITH_SUGGESTIONS=$(! nix build --impure --expr '(builtins.getFlake (builtins.toPath ./.)).packages.'$system'.fob' 2>&1 1>/dev/null)
[[ "$NIX_EVAL_STDERR_WITH_SUGGESTIONS" =~ "Did you mean one of fo1, fo2, foo or fooo?" ]] || \
fail "The evaluator should suggest the three closest possiblities"
NIX_EVAL_STDERR_WITH_SUGGESTIONS=$(! nix build --impure --expr '({ foo }: foo) { foo = 1; fob = 2; }' 2>&1 1>/dev/null)
[[ "$NIX_EVAL_STDERR_WITH_SUGGESTIONS" =~ "Did you mean foo?" ]] || \
fail "The evaluator should suggest the three closest possiblities"