Rust bindings (mir-sys crate)

.cargo/config.toml

@@ -0,0 +1,15 @@
+[build]
+jobs = -1
+
+[target.'cfg(all())']
+rustflags = [
+    "-Wclippy::all",
+    "-Wclippy::pedantic",
+    "-Wclippy::nursery",
+    "-Wclippy::unwrap_used",
+    "-Aclippy::module_name_repetitions",
+    "-Aclippy::missing_errors_doc",
+]
+
+[net]
+git-fetch-with-cli = true

.github/workflows/ci-rust.yml

@@ -0,0 +1,79 @@
+name: rust
+
+on:
+  push:
+    branches:
+      - 'master'
+      - 'develop'
+      - 'rust-bindings'
+    tags-ignore:
+      - '**'
+    paths:
+      - 'rust/**'
+      - '.github/workflows/ci-rust.yml'
+
+  pull_request:
+    paths:
+      - 'rust/**'
+      - '.github/workflows/ci-rust.yml'
+
+  workflow_dispatch: ~
+
+env:
+  CARGO_TERM_COLOR: always
+  CARGO_NET_GIT_FETCH_WITH_CLI: "true"
+
+jobs:
+  fmt:
+    name: fmt
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: rust
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+
+      - name: Format check
+        run: cargo fmt --check
+
+  clippy:
+    name: clippy
+    if: ${{ !github.event.pull_request.head.repo.fork }}
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: rust
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Configure git for private repos
+        run: git config --global url."https://x-access-token:${{ secrets.GH_REPO_READ_TOKEN }}@github.com/".insteadOf "ssh://git@github.com/"
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+
+      - name: Clippy
+        run: cargo clippy --features vendored --all-targets -- -D warnings
+
+  test:
+    name: test
+    if: ${{ !github.event.pull_request.head.repo.fork }}
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: rust
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Configure git for private repos
+        run: git config --global url."https://x-access-token:${{ secrets.GH_REPO_READ_TOKEN }}@github.com/".insteadOf "ssh://git@github.com/"
+
+      - uses: dtolnay/rust-toolchain@stable
+
+      - name: Test
+        run: cargo test --features vendored

.gitignore

@@ -21,3 +21,7 @@ python/**/*.cpp
 python/**/*.c
 python/**/__pycache__
 python/**/*.cpython-*
+
+# Rust
+rust/target/
+rust/Cargo.lock

rust/Cargo.toml

@@ -0,0 +1,32 @@
+[workspace]
+resolver = "2"
+members = ["crates/mir-sys"]
+
+[workspace.package]
+edition = "2024"
+license = "Apache-2.0"
+repository = "https://github.com/ecmwf/mir"
+rust-version = "1.90"
+readme = "README.md"
+keywords = ["ecmwf", "weather", "meteorology", "interpolation", "regridding"]
+categories = ["science"]
+
+[workspace.dependencies]
+# Internal
+mir-sys = { path = "crates/mir-sys" }
+
+# Foundation crates
+eckit-sys = { git = "ssh://git@github.com/ecmwf/eckit.git", branch = "rust-bindings", default-features = false }
+metkit-sys = { git = "ssh://git@github.com/ecmwf/metkit.git", branch = "rust-bindings", default-features = false }
+eccodes-sys = { git = "ssh://git@github.com/ecmwf/eccodes.git", branch = "rust-bindings", default-features = false }
+atlas-sys = { git = "ssh://git@github.com/ecmwf/atlas.git", branch = "rust-bindings", default-features = false }
+
+# Build tools
+bindman = { git = "ssh://git@github.com/ecmwf/bindman.git", branch = "generate_exception_bridge" }
+bindman-build = { git = "ssh://git@github.com/ecmwf/bindman.git", branch = "generate_exception_bridge" }
+bindman-utils = { git = "ssh://git@github.com/ecmwf/bindman.git", branch = "generate_exception_bridge" }
+
+# External
+cxx = "1.0"
+cxx-build = "1.0"
+thiserror = "2"

rust/crates/mir-sys/Cargo.toml

@@ -0,0 +1,53 @@
+[package]
+name = "mir-sys"
+version = "1.28.2"
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+readme.workspace = true
+keywords.workspace = true
+categories.workspace = true
+description = "C++ bindings to ECMWF mir (Meteorological Interpolation and Regridding) library using cxx"
+links = "mir_sys"
+build = "build.rs"
+
+[features]
+default = ["vendored"]
+
+# Build strategy (mutually exclusive)
+vendored = [
+    "eckit-sys/vendored",
+    "eckit-sys/eckit-spec",
+    "eckit-sys/eckit-geo",
+    "eckit-sys/geo-codec-grids",
+    "metkit-sys/vendored",
+    "metkit-sys/grib",
+    "eccodes-sys/vendored",
+    "eccodes-sys/product-grib",
+    "eccodes-sys/geography",
+    "eccodes-sys/memfs",
+    "eccodes-sys/eccodes-threads",
+    "atlas-sys/vendored",
+]
+system = [
+    "eckit-sys/system",
+    "metkit-sys/system",
+    "eccodes-sys/system",
+    "atlas-sys/system",
+]
+
+[dependencies]
+cxx.workspace = true
+eckit-sys = { workspace = true, default-features = false }
+metkit-sys = { workspace = true, default-features = false }
+eccodes-sys = { workspace = true, default-features = false }
+atlas-sys = { workspace = true, default-features = false }
+bindman.workspace = true
+
+[build-dependencies]
+cxx-build.workspace = true
+bindman-build.workspace = true
+bindman-utils.workspace = true
+
+[package.metadata.docs.rs]

rust/crates/mir-sys/README.md

@@ -0,0 +1,18 @@
+# mir-sys
+
+Low-level Rust bindings to ECMWF's [mir](https://github.com/ecmwf/mir) (Meteorological Interpolation and Regridding) C++ library.
+
+This crate provides raw FFI bindings using [cxx](https://cxx.rs/). For a safe, ergonomic API, use the higher-level `mir` crate (planned).
+
+## Features
+
+### Build strategy (mutually exclusive)
+
+- `vendored` - Build mir and its dependencies (eckit, metkit, ecCodes, atlas) from source.
+- `system` - Link against system-installed mir.
+
+`vendored` is enabled by default.
+
+## License
+
+Apache-2.0