Add gen-readme script

.gitignore

@@ -2,3 +2,4 @@
 /.py3/
 /variables.json
 /scrub-old-amis.py
+/gen-readme.py

Makefile

@@ -17,10 +17,10 @@ build/convert:
 	@echo "json.dump(yaml.load(open(sys.argv[1])), sys.stdout, indent=4, separators=(',', ': '))" >> build/convert
 	@chmod +x build/convert
 
-scrub-old-amis.py: scrub-old-amis.py.in
+%.py: %.py.in
 	sed "s|@PYTHON@|#!`pwd`/.py3/bin/python|" $< > $@
 	chmod +x $@
 
 .PHONY: clean
 clean:
-	rm -rf build .py3 scrub-old-amis.py
+	rm -rf build .py3 scrub-old-amis.py gen-readme.py

gen-readme.py.in

@@ -0,0 +1,17 @@
+@PYTHON@
+
+import yaml
+
+URI_TEMPLATE = "https://{region}.console.aws.amazon.com/ec2/home#launchAmi={ami}"
+ROW_TEMPLATE = "| {release} | {region} | [{ami}]({uri}) |"
+
+
+with open("release.yaml") as fp:
+    releases = yaml.load(fp)
+
+for metadata in releases.values():
+    release = str(metadata["alpine-release"])
+
+    for region, ami in metadata["region-identifiers"].items():
+        uri = URI_TEMPLATE.format(**locals())
+        print(ROW_TEMPLATE.format(**locals()))