Add check and release scripts.

Had to slightly adjust package names to make this work.

substreams/release.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+
+# Allows releasing multiple substream packages within the same repo.
+# To trigger a release simply create a tag with [package-name]-[semver].
+# The script will look for these tags, then infer which package needs to be built and
+# released.
+
+# Try to get the tag name associated with the current HEAD commit
+current_tag=$(git describe --tags --exact-match HEAD 2>/dev/null)
+
+if [ -n "$current_tag" ]; then
+    # If the HEAD is at a tag, extract the prefix and version
+    if [[ $current_tag =~ ^([a-zA-Z-]*-)?([0-9]+\.[0-9]+\.[0-9]+)$ ]]; then
+        # Prefix without the trailing hyphen (if any)
+        package="${BASH_REMATCH[1]%?}"
+        # Semantic version
+        version="${BASH_REMATCH[2]}"
+        tag=$current_tag
+
+        cargo_version=$(cargo pkgid -p ethereum-balancer | cut -d# -f2 | cut -d: -f2)
+        if [[ "$cargo_version" != "$version" ]]; then
+          echo "Error: Cargo version: ${cargo_version} does not match tag version: ${version}!"
+          exit 1
+        fi
+        # Check if the Git repository is dirty
+        if [ -n "$(git status --porcelain)" ]; then
+          echo "Error: The repository is dirty. Please commit or stash your changes."
+          exit 1
+        fi
+    else
+        echo "Error: Current tag ($current_tag) does not match the expected format."
+        exit 1
+    fi
+else
+    # If the HEAD is not at a tag, construct the tag name with the pre-release postfix
+    if [ -z "$1" ]; then
+        echo "Error: package argument is required to create a pre release!"
+        exit 1
+    fi
+    package=$1
+
+    version_prefix=$(git describe --tags --match "$package-*" --abbrev=0 2>/dev/null)
+    if [ -z "$version_prefix" ]; then
+        # If no tags are found in the history, default to version 0.0.1
+        version_prefix="0.0.1"
+    fi
+
+    # Get the short commit hash of the current HEAD
+    commit_hash=$(git rev-parse --short HEAD)
+    version="${version_prefix}-pre.${commit_hash}"
+    # Combine version prefix with commit hash
+    tag="${package}-${version}"
+fi
+
+cargo build --target wasm32-unknown-unknown --release -p "$package"
+mkdir -p ./target/spkg/
+substreams pack $package/substreams.yaml -o ./target/spkg/$package-$version.spkg
+aws s3 cp ./target/spkg/$package-$version.spkg "s3://repository.propeller/substreams/$package/$version.spkg"
+
+echo "Released substreams package: "s3://repository.propeller/substreams/$package/$version.spkg""