subprojects: add attrs crate

The attrs crate is a simple combinator-based for Rust attributes.  It
will be used instead of a handwritten parser.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

rust/meson.build

@@ -13,10 +13,12 @@ libc_rs = dependency('libc-0.2-rs')
 subproject('proc-macro2-1-rs', required: true)
 subproject('quote-1-rs', required: true)
 subproject('syn-2-rs', required: true)
+subproject('attrs-0.2-rs', required: true)
 
 quote_rs_native = dependency('quote-1-rs', native: true)
 syn_rs_native = dependency('syn-2-rs', native: true)
 proc_macro2_rs_native = dependency('proc-macro2-1-rs', native: true)
+attrs_rs_native = dependency('attrs-0.2-rs', native: true)
 
 genrs = []
 

rust/qemu-macros/Cargo.toml

@@ -16,6 +16,7 @@ rust-version.workspace = true
 proc-macro = true
 
 [dependencies]
+attrs = "0.2.9"
 proc-macro2 = "1"
 quote = "1"
 syn = { version = "2", features = ["extra-traits"] }

rust/qemu-macros/meson.build

@@ -8,6 +8,7 @@ _qemu_macros_rs = rust.proc_macro(
     '--cfg', 'feature="proc-macro"',
   ],
   dependencies: [
+    attrs_rs_native,
     proc_macro2_rs_native,
     quote_rs_native,
     syn_rs_native,

scripts/archive-source.sh

@@ -27,7 +27,7 @@ sub_file="${sub_tdir}/submodule.tar"
 # in their checkout, because the build environment is completely
 # different to the host OS.
 subprojects="keycodemapdb libvfio-user berkeley-softfloat-3
-  berkeley-testfloat-3 anyhow-1-rs arbitrary-int-1-rs bilge-0.2-rs
+  berkeley-testfloat-3 anyhow-1-rs arbitrary-int-1-rs attrs-0.2-rs bilge-0.2-rs
   bilge-impl-0.2-rs either-1-rs foreign-0.3-rs itertools-0.11-rs
   libc-0.2-rs proc-macro2-1-rs
   proc-macro-error-1-rs proc-macro-error-attr-1-rs quote-1-rs

scripts/make-release

@@ -40,7 +40,7 @@ fi
 
 # Only include wraps that are invoked with subproject()
 SUBPROJECTS="libvfio-user keycodemapdb berkeley-softfloat-3
-  berkeley-testfloat-3 anyhow-1-rs arbitrary-int-1-rs bilge-0.2-rs
+  berkeley-testfloat-3 anyhow-1-rs arbitrary-int-1-rs attrs-0.2-rs bilge-0.2-rs
   bilge-impl-0.2-rs either-1-rs foreign-0.3-rs itertools-0.11-rs
   libc-0.2-rs proc-macro2-1-rs
   proc-macro-error-1-rs proc-macro-error-attr-1-rs quote-1-rs

subprojects/.gitignore

@@ -8,6 +8,7 @@
 /slirp
 /anyhow-1.0.98
 /arbitrary-int-1.2.7
+/attrs-0.2.9
 /bilge-0.2.0
 /bilge-impl-0.2.0
 /either-1.12.0

subprojects/attrs-0.2-rs.wrap

@@ -0,0 +1,7 @@
+[wrap-file]
+directory = attrs-0.2.9
+source_url = https://crates.io/api/v1/crates/attrs/0.2.9/download
+source_filename = attrs-0.2.9.tar.gz
+source_hash = 2a207d40f43de65285f3de0509bb6cb16bc46098864fce957122bbacce327e5f
+#method = cargo
+patch_directory = attrs-0.2-rs

subprojects/packagefiles/attrs-0.2-rs/meson.build

@@ -0,0 +1,33 @@
+project('attrs-0.2-rs', 'rust',
+  meson_version: '>=1.5.0',
+  version: '0.2.9',
+  license: 'MIT OR Apache-2.0',
+  default_options: [])
+
+subproject('proc-macro2-1-rs', required: true)
+subproject('syn-2-rs', required: true)
+
+proc_macro2_dep = dependency('proc-macro2-1-rs', native: true)
+syn_dep = dependency('syn-2-rs', native: true)
+
+_attrs_rs = static_library(
+  'attrs',
+  files('src/lib.rs'),
+  gnu_symbol_visibility: 'hidden',
+  override_options: ['rust_std=2021', 'build.rust_std=2021'],
+  rust_abi: 'rust',
+  rust_args: [
+    '--cap-lints', 'allow',
+  ],
+  dependencies: [
+    proc_macro2_dep,
+    syn_dep,
+  ],
+  native: true,
+)
+
+attrs_dep = declare_dependency(
+  link_with: _attrs_rs,
+)
+
+meson.override_dependency('attrs-0.2-rs', attrs_dep, native: true)