Auto-Update rust versions in docs from registry

Signed-off-by: svrnm <[email protected]>

content/en/docs/languages/rust/exporters.md

@@ -9,11 +9,12 @@ cSpell:ignore: chrono millis ostream
 ## OTLP endpoint
 
 To send trace data to a OTLP endpoint (like the [collector](/docs/collector) or
-Jaeger) you'll want to use an exporter crate, such as `opentelemetry_otlp`:
+Jaeger) you'll want to use an exporter crate, such as
+[`opentelemetry-otlp`](https://crates.io/crates/opentelemetry-otlp):
 
 ```toml
 [dependencies]
-opentelemetry-otlp = { version = "0.13", features = ["default"] }
+opentelemetry-otlp = { version = "{{% version-from-registry exporter-rust-otlp %}}", features = ["default"] }
 ```
 
 Next, configure the exporter to point at an OTLP endpoint. For example you can

content/en/docs/languages/rust/getting-started.md

@@ -103,11 +103,14 @@ Listening on 127.0.0.1:8080
 ## Instrumentation
 
 To add OpenTelemetry to your application, update the `Cargo.toml` with the
-following additional dependencies:
+dependencies for the OpenTelemetry Rust SDK
+[`opentelemetry`](https://crates.io/crates/opentelemetry) and the OpenTelemetry
+Stdout Exporter
+[`opentelemetry-stdout`](https://crates.io/crates/opentelemetry-stdout):
 
 ```toml
-opentelemetry = { version = "0.20", features = ["trace"] }
-opentelemetry-stdout = { version = "0.1", features = ["trace"] }
+opentelemetry = { version = "{{% version-from-registry otel-rust %}}", features = ["trace"] }
+opentelemetry-stdout = { version = "{{% version-from-registry exporter-rust-stdout %}}", features = ["trace"] }
 ```
 
 Update the `dice_server.rs` file with code to initialize a tracer and to emit

data/registry/otel-rust.yml

@@ -10,3 +10,7 @@ authors:
 urls:
   repo: https://github.com/open-telemetry/opentelemetry-rust
 createdAt: 2020-02-04
+package:
+  registry: crates
+  name: opentelemetry
+  version: 0.21.0

layouts/shortcodes/version-from-registry.md

@@ -0,0 +1,17 @@
+{{ $name := (.Get 0) -}}
+
+{{ with $name -}}
+    {{ $registryEntry := (index $.Site.Data.registry .) -}}
+    {{ with $registryEntry -}}
+        {{ $version := .package.version -}}
+        {{ with $version }}
+            {{- . -}}
+        {{- else -}}
+            {{ errorf "No 'package.version' in registry entry %q: %s" $name $.Position -}}
+        {{- end -}}
+    {{- else -}}
+        {{ errorf "Registry entry %q not found: %s" $name $.Position -}}
+    {{- end -}}
+{{- else -}}
+  {{ errorf "Missing registry entry name: %s" $.Position -}}
+{{- end -}}