Kriskras99 commented on code in PR #377:
URL: https://github.com/apache/avro-rs/pull/377#discussion_r2660929093
##########
avro_derive/src/attributes/mod.rs:
##########
@@ -0,0 +1,202 @@
+use darling::FromAttributes;
+use proc_macro2::Span;
+use syn::Attribute;
+
+use crate::{case::RenameRule, darling_to_syn};
+
+pub mod avro;
+pub mod serde;
+
+#[derive(Default)]
+pub struct NamedTypeOptions {
+ pub name: Option<String>,
+ pub namespace: Option<String>,
+ pub doc: Option<String>,
+ pub alias: Vec<String>,
+ pub rename_all: RenameRule,
+}
+
+impl NamedTypeOptions {
+ pub fn new(attributes: &[Attribute], span: Span) -> Result<Self,
Vec<syn::Error>> {
+ let avro =
+
avro::ContainerAttributes::from_attributes(attributes).map_err(darling_to_syn)?;
+ let serde =
+
serde::ContainerAttributes::from_attributes(attributes).map_err(darling_to_syn)?;
+
+ // Collect errors so user gets all feedback at once
+ let mut errors = Vec::new();
+
+ // Check for any Serde attributes that are hard errors
+ if serde.tag.is_some()
+ || serde.content.is_some()
+ || serde.untagged
+ || serde.variant_identifier
+ || serde.field_identifier
+ {
+ errors.push(syn::Error::new(
+ span,
+ "AvroSchema derive does not support changing the tagging Serde
generates (`tag`, `content`, `untagged`, `variant_identifier`,
`field_identifier`)",
+ ));
+ }
+ if serde.remote.is_some() {
+ errors.push(syn::Error::new(
+ span,
+ "AvroSchema derive does not support the Serde `remote`
attribute",
+ ));
+ }
+ if serde.transparent {
+ errors.push(syn::Error::new(
+ span,
+ "AvroSchema derive does not support Serde transparent",
+ ))
+ }
+ if serde.rename_all.deserialize != serde.rename_all.serialize {
+ errors.push(syn::Error::new(
+ span,
+ "AvroSchema derive does not support different rename rules for
serializing and deserializing (`rename_all(serialize = \"..\", deserialize =
\"..\")`)"
+ ))
+ }
+
+ // Check for conflicts between Serde and Avro
+ if avro.rename_all != RenameRule::None && serde.rename_all.serialize
!= avro.rename_all {
+ errors.push(syn::Error::new(
+ span,
+ "#[avro(rename_all = \"..\")] must match #[serde(rename_all =
\"..\")], it's also deprecated. Please use only `#[serde(rename_all =
\"..\")]`",
+ ))
+ }
+
+ if !errors.is_empty() {
+ return Err(errors);
+ }
+
+ Ok(Self {
+ name: avro.name,
+ namespace: avro.namespace,
+ doc: avro.doc,
+ alias: avro.alias,
+ rename_all: serde.rename_all.serialize,
+ })
+ }
+}
+
+pub struct FieldOptions {
+ pub doc: Option<String>,
+ pub default: Option<String>,
+ pub alias: Vec<String>,
+ pub rename: Option<String>,
+ pub skip: bool,
+ pub flatten: bool,
+}
+
+impl FieldOptions {
+ pub fn new(attributes: &[Attribute], span: Span) -> Result<Self,
Vec<syn::Error>> {
+ let avro =
avro::FieldAttributes::from_attributes(attributes).map_err(darling_to_syn)?;
+ let serde =
serde::FieldAttributes::from_attributes(attributes).map_err(darling_to_syn)?;
+
+ // Collect errors so user gets all feedback at once
+ let mut errors = Vec::new();
+
+ // Check for any Serde attributes that are hard errors
+ if serde.getter.is_some() {
+ errors.push(syn::Error::new(
+ span,
+ "AvroSchema derive does not support the Serde `getter`
attribute",
+ ));
+ }
+
+ // Check for conflicts between Serde and Avro
+ if avro.skip && !serde.skip {
+ errors.push(syn::Error::new(
+ span,
+ "`#[avro(skip)]` requires `#[serde(skip)]`, it's also
deprecated. Please use only `#[serde(skip)]`"
Review Comment:
Added in the new commit
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