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#!/usr/libexec/flua
local ucl = require("ucl")
-- read from environment variables
local os_type = os.getenv("TYPE")
local os_version = os.getenv("OSRELEASE")
-- the raw file
local capability_file = os.getenv("ORACLE_CAPABILITY")
-- the platform-specific file
local shapes_file = os.getenv("ORACLE_SHAPES")
-- base template
local template_file = os.getenv("ORACLE_TEMPLATE")
local output_file = os.getenv("ORACLE_OUTPUT")
if not os_type or not os_version or not capability_file or
not shapes_file or not template_file or not output_file then
io.stderr:write("Error: Oracle metadata script is missing required environment variables:\n")
io.stderr:write("TYPE, OSRELEASE, ORACLE_CAPABILITY, ORACLE_SHAPES, ORACLE_TEMPLATE, ORACLE_OUTPUT\n")
os.exit(1)
end
-- read files
local function read_file(path)
local f = io.open(path, "r")
if not f then
io.stderr:write("Error: Oracle metadata script cannot open file: " .. path .. "\n")
os.exit(1)
end
local content = f:read("*a")
f:close()
return content
end
-- parse the template
local template = read_file(template_file)
local metadata = ucl.parser()
metadata:parse_string(template)
local data = metadata:get_object()
-- update the simple fields
data.operatingSystem = os_type
data.operatingSystemVersion = os_version
-- capability data is actually JSON, but needs to be inserted as a raw blob
local caps = read_file(capability_file)
-- remove all newlines and preceding spaces to match Oracle's format
caps = caps:gsub("\n", "")
caps = caps:gsub("%s+", "")
-- is it still valid JSON?
local caps_parser = ucl.parser()
if not caps_parser:parse_string(caps) then
io.stderr:write("Error: Oracle metadata script found invalid JSON in capability file\n")
os.exit(1)
end
-- insert as a raw blob
data.imageCapabilityData = caps
-- parse and insert architecture-dependent shape compatibilities data
local shapes_data = read_file(shapes_file)
local shapes = ucl.parser()
shapes:parse_string(shapes_data)
data.additionalMetadata.shapeCompatibilities = shapes:get_object()
-- save the metadata file
local dir = os.getenv("PWD")
local out = io.open(output_file, "w")
if not out then
io.stderr:write("Error: Oracle metadata script cannot create output file: "
.. dir .. "/" .. output_file .. "\n")
os.exit(1)
end
out:write(ucl.to_format(data, "json", {pretty = true}))
out:close()
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