Add script for schema download from specified ref

Makefile

@@ -40,6 +40,10 @@ sync-deps:
 	@echo ">synchronizing python dependencies"
 	$(ps) requirements.txt devel-requirements.txt $$([ -f local-requirements.txt ] && echo 'local-requirements.txt')
 
+download-schema:
+	@echo ">downloading Component Registry OpenAPI schema for ref \"$(ref)\""
+	scripts/download_schema.sh $(ref)
+
 patch-release:
 	@echo ">preparing patch release"
 	scripts/patch_release.sh

scripts/download_schema.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+# download OpenAPI schema file from specified ref
+
+source scripts/helpers.sh
+
+get_schema ${1}

scripts/helpers.sh

@@ -119,3 +119,20 @@ review() {
     fi
     echo
 }
+
+# Get OpenAPI schema from github API
+# $1: version (defaults to "master")
+get_schema() {
+    local version=${1:-master}
+
+    echo "Downloading Comopnent Registry schema version "
+    local response=$(curl -s "https://raw.githubusercontent.com/RedHatProductSecurity/component-registry/${version}/openapi.yml" \
+    -o component_registry_bindings/openapi_schema.yml -f -w 'HTTPSTATUS:%{http_code}\n')
+
+    local status=$(echo ${response} | tr -d '\n' | sed -E 's/.*HTTPSTATUS:([0-9]{3})$/\1/')
+
+    if [ ! ${status} -eq 200 ]; then
+        echo "Error accessing \"https://raw.githubusercontent.com/RedHatProductSecurity/component-registry/${version}/openapi.yml\" [HTTP status: ${status}]"
+        exit 1
+    fi
+}