[WIP] Code Generation with Weaver - Example of Code Generation for SemConv Attribute Registry and SemConv Metrics

.github/codecov.yaml

@@ -13,4 +13,5 @@ coverage:
 
 ignore:
   - "crates/xtask"  # Part of the build system
-  - "src"           # CLI (not tested yet)
+  - "src"           # CLI (not tested yet)
+  - "crates/weaver_forge/codegen_examples/expected_codegen" # Generated code

.github/workflows/ci.yml

@@ -175,7 +175,7 @@ jobs:
       - name: Install cargo-tarpaulin
         run: cargo install cargo-tarpaulin
       - name: Gather coverage
-        run: cargo tarpaulin --workspace --output-dir coverage --out lcov -e xtask -e weaver
+        run: cargo tarpaulin --workspace --output-dir coverage --out lcov -e xtask -e weaver --exclude-files 'crates/weaver_forge/codegen_examples/expected_codegen/*'
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v4.0.1
         with:

Cargo.toml

@@ -10,6 +10,7 @@ categories = ["command-line-utilities"]
 license = "Apache-2.0"
 readme = "README.md"
 publish = false
+resolver = "2"
 
 # Workspace definition ========================================================
 [workspace]

README.md

@@ -5,7 +5,7 @@
 [![build](https://github.com/open-telemetry/weaver/actions/workflows/audit.yml/badge.svg)](https://github.com/open-telemetry/weaver/actions/workflows/audit.yml)
 [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 ----
-(CONTRIBUTING.md) | [Links](#links) |
+
 [Getting started](#getting-started) | [Main commands](#main-commands) | [Generate Doc & Code](crates/weaver_forge/README.md) | [Architecture](docs/architecture.md) | [Change log](CHANGELOG.md) | [Contributing](CONTRIBUTING.md) | [Links](#links) |
 
 ## What is OpenTelemetry Weaver?

crates/weaver_codegen_test/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "weaver_codegen_test"
+version = "0.1.0"
+authors.workspace = true
+repository.workspace = true
+license.workspace = true
+publish.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+
+[lints]
+workspace = true
+
+[build-dependencies]
+weaver_common = { path = "../weaver_common" }
+weaver_cache = { path = "../weaver_cache" }
+weaver_forge = { path = "../weaver_forge" }
+weaver_resolver = { path = "../weaver_resolver" }
+weaver_semconv = { path = "../weaver_semconv" }
+walkdir.workspace = true
+
+[dependencies]
+opentelemetry = { version = "0.22.0", features = ["trace", "metrics", "logs", "otel_unstable"] }

crates/weaver_codegen_test/README.md

@@ -0,0 +1,7 @@
+# Weaver CodeGen Test
+
+This crate is used to test the generation of an unofficial Rust OpenTelemetry Client API derived from a semantic
+convention registry. This crate is not intended to be published. It is used solely for testing and validation purposes.
+
+The generated Rust API client exposes a type-safe API (i.e., one that cannot be misused) that adheres to the signal
+specification defined in the semantic convention registry located in the semconv_registry directory.

crates/weaver_codegen_test/allowed-external-types.toml

@@ -0,0 +1,6 @@
+# Copyright The OpenTelemetry Authors
+# SPDX-License-Identifier: Apache-2.0
+# This is used with cargo-check-external-types to reduce the surface area of downstream crates from
+# the public API. Ideally this can have a few exceptions as possible.
+allowed_external_types = [
+]