add generators metadata file

Signed-off-by: Alice Wasko <[email protected]>

.github/workflows/push.yaml

@@ -0,0 +1,37 @@
+name: Generators
+
+on:
+  push:
+    branches:
+      - "**"
+
+jobs:
+  generate:
+    name: Generate
+    runs-on: ubuntu-latest
+    env:
+      GH_API_KEY: ${{ secrets.GH_API_KEY }}
+    steps:
+      - name: Checkout local
+        uses: actions/checkout@v3
+
+      - name: Setup Git Config
+        shell: bash
+        run: |
+          set -x
+          git config --global user.email '${{ secrets.GH_AUTO_EMAIL }}'
+          git config --global user.name '${{ secrets.GH_AUTO_USER }}'
+          git config --global url.https://${GH_API_KEY}@github.com/.insteadOf https://github.com/
+
+      # Generate and then make sure no changes have occurred
+      - name: Generate
+        run: |
+          make generate
+
+      - name: Check porcelain
+        run: |
+          git add .
+          if [[ -n "$(git status --porcelain)" ]]; then
+              PAGER= git diff --cached
+              exit 1
+          fi

Makefile

@@ -0,0 +1,35 @@
+GENERATORS_DIR := generators
+GENERATOR_METADATA_FILE := generator-config.yaml
+JSON_OUTPUT := generators.json
+
+# Setting SHELL to bash allows bash commands to be executed by recipes.
+# Options are set to exit when a recipe line exits non-zero or a piped command fails.
+SHELL = /usr/bin/env bash -o pipefail
+.SHELLFLAGS = -ec
+
+# Default `make` to run `make generate`
+.PHONY: all
+all: generate
+
+.PHONY: generate
+generate:
+	@echo "{" > $(JSON_OUTPUT)
+	@echo '  "generators": [' >> $(JSON_OUTPUT)
+	@find $(GENERATORS_DIR) -type f -name $(GENERATOR_METADATA_FILE) | while read -r generator_config_file; do \
+		gen_dir="$$(dirname "$$generator_config_file")"; \
+		gen_name="$$(yq eval '.metadata.name' "$$generator_config_file")"; \
+		gen_description="$$(yq eval '.metadata.description' "$$generator_config_file")"; \
+		gen_version="$$(yq eval '.metadata.version' "$$generator_config_file")"; \
+		gen_languages="$$(yq eval '.metadata.languages' "$$generator_config_file")"; \
+		gen_hash="$$(find "$$gen_dir" -type f -exec md5sum {} + | awk '{print $$1}' | sort | md5sum | awk '{print $$1}')"; \
+		echo '    {' >> $(JSON_OUTPUT); \
+		echo '      "name": "'$$gen_name'",' >> $(JSON_OUTPUT); \
+		echo '      "description": "'$$gen_description'",' >> $(JSON_OUTPUT); \
+		echo '      "version": "'$$gen_version'",' >> $(JSON_OUTPUT); \
+		echo '      "languages": '$$gen_languages',' >> $(JSON_OUTPUT); \
+		echo '      "directory": "'$$gen_dir'",' >> $(JSON_OUTPUT); \
+		echo '      "hash": "'$$gen_hash'"' >> $(JSON_OUTPUT); \
+		echo '    },' >> $(JSON_OUTPUT); \
+	done
+	@sed -i '$$s/,$$/]/' $(JSON_OUTPUT)
+	@echo "}" >> $(JSON_OUTPUT)

generators.json

@@ -0,0 +1,11 @@
+{
+  "generators": [
+    {
+      "name": "Ambassador Labs Go Generator",
+      "description": "Generates a new project for an API server writen in go",
+      "version": "1.0.0",
+      "languages": ["go"],
+      "directory": "generators/go",
+      "hash": "6fdd0aeefb61bbb9a9d70c2f007f18fb"
+    }]
+}

go/generator-config.yaml → generators/go/generator-config.yaml

@@ -1,5 +1,6 @@
 metadata:
   name: "Ambassador Labs Go Generator"
+  description: "Generates a new project for an API server writen in go"
   version: "1.0.0"
   languages: ["go"]