bjoernager/rust
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Prefer suggesting string-literal for Cargo check-cfg lint config

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This commit is contained in:
Urgau 2024-05-16 22:29:55 +02:00
parent 05f77d1b79
commit 7cb84fbf14
4 changed files with 36 additions and 25 deletions
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47
compiler/rustc_lint/src/context/diagnostics/check_cfg.rs
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@ -41,6 +41,25 @@ fn check_cfg_expected_note(
note
}
enum EscapeQuotes {
Yes,
No,
}
fn to_check_cfg_arg(name: Symbol, value: Option<Symbol>, quotes: EscapeQuotes) -> String {
if let Some(value) = value {
let values = match quotes {
EscapeQuotes::Yes => {
format!("\\\"{}\\\"", str::escape_debug(value.as_str()).to_string())
}
EscapeQuotes::No => format!("\"{value}\""),
};
format!("cfg({name}, values({values}))")
} else {
format!("cfg({name})")
}
}
pub(super) fn unexpected_cfg_name(
sess: &Session,
diag: &mut Diag<'_, ()>,
@ -155,21 +174,17 @@ pub(super) fn unexpected_cfg_name(
}
}
let inst = if let Some((value, _value_span)) = value {
let pre = if is_from_cargo { "\\" } else { "" };
format!("cfg({name}, values({pre}\"{value}{pre}\"))")
} else {
format!("cfg({name})")
};
let inst = |escape_quotes| to_check_cfg_arg(name, value.map(|(v, _s)| v), escape_quotes);
if is_from_cargo {
if !is_feature_cfg {
diag.help(format!("consider using a Cargo feature instead"));
diag.help(format!("or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:\n [lints.rust]\n unexpected_cfgs = {{ level = \"warn\", check-cfg = [\"{inst}\"] }}"));
diag.help(format!("or consider adding `println!(\"cargo::rustc-check-cfg={inst}\");` to the top of the `build.rs`"));
diag.help(format!("or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:\n [lints.rust]\n unexpected_cfgs = {{ level = \"warn\", check-cfg = ['{}'] }}", inst(EscapeQuotes::No)));
diag.help(format!("or consider adding `println!(\"cargo::rustc-check-cfg={}\");` to the top of the `build.rs`", inst(EscapeQuotes::Yes)));
}
} else {
diag.help(format!("to expect this configuration use `--check-cfg={inst}`"));
let inst = inst(EscapeQuotes::No);
diag.help(format!("to expect this configuration use `--check-cfg={inst}`",));
}
diag.note("see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration");
}
@ -252,12 +267,7 @@ pub(super) fn unexpected_cfg_value(
// do it if they want, but should not encourage them.
let is_cfg_a_well_know_name = sess.psess.check_config.well_known_names.contains(&name);
let inst = if let Some((value, _value_span)) = value {
let pre = if is_from_cargo { "\\" } else { "" };
format!("cfg({name}, values({pre}\"{value}{pre}\"))")
} else {
format!("cfg({name})")
};
let inst = |escape_quotes| to_check_cfg_arg(name, value.map(|(v, _s)| v), escape_quotes);
if is_from_cargo {
if name == sym::feature {
@ -268,12 +278,13 @@ pub(super) fn unexpected_cfg_value(
}
} else if !is_cfg_a_well_know_name {
diag.help(format!("consider using a Cargo feature instead"));
diag.help(format!("or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:\n [lints.rust]\n unexpected_cfgs = {{ level = \"warn\", check-cfg = [\"{inst}\"] }}"));
diag.help(format!("or consider adding `println!(\"cargo::rustc-check-cfg={inst}\");` to the top of the `build.rs`"));
diag.help(format!("or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:\n [lints.rust]\n unexpected_cfgs = {{ level = \"warn\", check-cfg = ['{}'] }}", inst(EscapeQuotes::No)));
diag.help(format!("or consider adding `println!(\"cargo::rustc-check-cfg={}\");` to the top of the `build.rs`", inst(EscapeQuotes::Yes)));
}
} else {
if !is_cfg_a_well_know_name {
diag.help(format!("to expect this configuration use `--check-cfg={inst}`"));
let inst = inst(EscapeQuotes::No);
diag.help(format!("to expect this configuration use `--check-cfg={inst}`",));
}
}
diag.note("see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration");