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Generate fluent message constant in a flat module for all crates

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This will make it easier to grep for fluent message names.
This commit is contained in:
Nilstrieb 2022-10-21 12:25:25 +02:00
parent 6c9c2d862d
commit 2459569776
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1 changed files with 31 additions and 34 deletions
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65
compiler/rustc_macros/src/diagnostics/fluent.rs
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@ -25,18 +25,18 @@ use syn::{
use unic_langid::langid;
struct Resource {
ident: Ident,
krate: Ident,
#[allow(dead_code)]
fat_arrow_token: token::FatArrow,
resource: LitStr,
resource_path: LitStr,
}
impl Parse for Resource {
fn parse(input: ParseStream<'_>) -> Result<Self> {
Ok(Resource {
ident: input.parse()?,
krate: input.parse()?,
fat_arrow_token: input.parse()?,
resource: input.parse()?,
resource_path: input.parse()?,
})
}
}
@ -94,19 +94,20 @@ pub(crate) fn fluent_messages(input: proc_macro::TokenStream) -> proc_macro::Tok
// diagnostics.
let mut previous_defns = HashMap::new();
// Set of Fluent attribute names already output, to avoid duplicate type errors - any given
// constant created for a given attribute is the same.
let mut previous_attrs = HashSet::new();
let mut includes = TokenStream::new();
let mut generated = TokenStream::new();
for res in resources.0 {
let ident_span = res.ident.span().unwrap();
let path_span = res.resource.span().unwrap();
let krate_span = res.krate.span().unwrap();
let path_span = res.resource_path.span().unwrap();
// Set of Fluent attribute names already output, to avoid duplicate type errors - any given
// constant created for a given attribute is the same.
let mut previous_attrs = HashSet::new();
let relative_ftl_path = res.resource.value();
let relative_ftl_path = res.resource_path.value();
let absolute_ftl_path =
invocation_relative_path_to_absolute(ident_span, &relative_ftl_path);
invocation_relative_path_to_absolute(krate_span, &relative_ftl_path);
// As this macro also outputs an `include_str!` for this file, the macro will always be
// re-executed when the file changes.
let mut resource_file = match File::open(absolute_ftl_path) {
@ -185,7 +186,7 @@ pub(crate) fn fluent_messages(input: proc_macro::TokenStream) -> proc_macro::Tok
let mut constants = TokenStream::new();
for entry in resource.entries() {
let span = res.ident.span();
let span = res.krate.span();
if let Entry::Message(Message { id: Identifier { name }, attributes, .. }) = entry {
let _ = previous_defns.entry(name.to_string()).or_insert(path_span);
@ -199,29 +200,30 @@ pub(crate) fn fluent_messages(input: proc_macro::TokenStream) -> proc_macro::Tok
.emit();
}
// `typeck_foo_bar` => `foo_bar` (in `typeck.ftl`)
// `const_eval_baz` => `baz` (in `const_eval.ftl`)
// Require that the message name starts with the crate name
// `hir_typeck_foo_bar` (in `hir_typeck.ftl`)
// `const_eval_baz` (in `const_eval.ftl`)
// `const-eval-hyphen-having` => `hyphen_having` (in `const_eval.ftl`)
// The last case we error about above, but we want to fall back gracefully
// so that only the error is being emitted and not also one about the macro
// failing.
let crate_prefix = format!("{}_", res.ident);
let crate_prefix = format!("{}_", res.krate);
let snake_name = name.replace('-', "_");
let snake_name = match snake_name.strip_prefix(&crate_prefix) {
Some(rest) => Ident::new(rest, span),
None => {
Diagnostic::spanned(
path_span,
Level::Error,
format!("name `{name}` does not start with the crate name"),
)
.help(format!("prepend `{crate_prefix}` to the slug name: `{crate_prefix}{snake_name}`"))
.emit();
Ident::new(&snake_name, span)
}
if !snake_name.starts_with(&crate_prefix) {
Diagnostic::spanned(
path_span,
Level::Error,
format!("name `{name}` does not start with the crate name"),
)
.help(format!(
"prepend `{crate_prefix}` to the slug name: `{crate_prefix}{snake_name}`"
))
.emit();
};
let snake_name = Ident::new(&snake_name, span);
constants.extend(quote! {
pub const #snake_name: crate::DiagnosticMessage =
crate::DiagnosticMessage::FluentIdentifier(
@ -275,12 +277,7 @@ pub(crate) fn fluent_messages(input: proc_macro::TokenStream) -> proc_macro::Tok
includes.extend(quote! { include_str!(#relative_ftl_path), });
let ident = res.ident;
generated.extend(quote! {
pub mod #ident {
#constants
}
});
generated.extend(constants);
}
quote! {