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use crate::gen::inside::protobuf_crate_path;
use crate::gen::rust::ident::RustIdent;
use crate::gen::rust::path::RustPath;
use crate::gen::strx;
use crate::gen::well_known_types::WELL_KNOWN_TYPES_PROTO_FILE_FULL_NAMES;
use crate::Customize;
// Copy-pasted from libsyntax.
fn ident_start(c: char) -> bool {
(c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_'
}
// Copy-pasted from libsyntax.
fn ident_continue(c: char) -> bool {
(c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '_'
}
pub(crate) fn proto_path_to_rust_mod(path: &str) -> RustIdent {
let without_dir = strx::remove_to(path, std::path::is_separator);
let without_suffix = strx::remove_suffix(without_dir, ".proto");
let name = without_suffix
.chars()
.enumerate()
.map(|(i, c)| {
let valid = if i == 0 {
ident_start(c)
} else {
ident_continue(c)
};
if valid {
c
} else {
'_'
}
})
.collect::<String>();
RustIdent::new(&name)
}
/// Used in protobuf-codegen-identical-test
pub fn proto_name_to_rs(proto_file_path: &str) -> String {
format!("{}.rs", proto_path_to_rust_mod(proto_file_path))
}
pub(crate) fn proto_path_to_fn_file_descriptor(
proto_path: &str,
customize: &Customize,
) -> RustPath {
let protobuf_crate = protobuf_crate_path(customize);
match proto_path {
"rustproto.proto" => protobuf_crate.append("rustproto::file_descriptor".into()),
"google/protobuf/descriptor.proto" => {
protobuf_crate.append("descriptor::file_descriptor".into())
}
s if WELL_KNOWN_TYPES_PROTO_FILE_FULL_NAMES.contains(&s) => protobuf_crate
.append_ident("well_known_types".into())
.append_ident(proto_path_to_rust_mod(s))
.append_ident("file_descriptor".into()),
s => RustPath::super_path()
.append_ident(proto_path_to_rust_mod(s))
.append_ident("file_descriptor".into()),
}
}
#[cfg(test)]
mod test {
use super::proto_path_to_rust_mod;
use crate::gen::rust::ident::RustIdent;
#[test]
fn test_mod_path_proto_ext() {
assert_eq!(
RustIdent::from("proto"),
proto_path_to_rust_mod("proto.proto")
);
}
#[test]
fn test_mod_path_unknown_ext() {
assert_eq!(
RustIdent::from("proto_proto3"),
proto_path_to_rust_mod("proto.proto3")
);
}
#[test]
fn test_mod_path_empty_ext() {
assert_eq!(RustIdent::from("proto"), proto_path_to_rust_mod("proto"));
}
#[test]
fn test_mod_path_dir() {
assert_eq!(
RustIdent::from("baz"),
proto_path_to_rust_mod("foo/bar/baz.proto"),
)
}
#[cfg(target_os = "windows")]
#[test]
fn test_mod_path_dir_backslashes() {
assert_eq!(
RustIdent::from("baz"),
proto_path_to_rust_mod("foo\\bar\\baz.proto"),
)
}
}
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