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#!/usr/bin/env luajit
-- Checks for updated Chromium extensions against their GitHub releases/tags.
local cjson = require("cjson")
local http_request = require("http.request")
local rawExtensionsString = "@@EXTENSIONS@@"
local extensions = cjson.decode(rawExtensionsString)
local function printf(fmt, ...)
io.write(string.format(fmt, ...))
end
-- Performs a GET request against the GitHub API and returns the
-- decoded JSON body, or nil plus an error message.
local function githubGetJson(url)
local req = http_request.new_from_uri(url)
req.headers:upsert("user-agent", "check-chromium-extension-updates")
req.headers:upsert("accept", "application/vnd.github+json")
local headers, stream = req:go(10) -- 10s timeout
if not headers then
-- on failure, `stream` actually holds the error message
return nil, tostring(stream)
end
local body, err = stream:get_body_as_string()
stream:shutdown()
if not body then
return nil, err or "no response body"
end
local status = headers:get(":status")
if status ~= "200" then
return nil, string.format("HTTP %s", tostring(status))
end
local ok, decoded = pcall(cjson.decode, body)
if not ok then
return nil, "failed to decode JSON response"
end
return decoded, nil
end
print("Checking for Chromium extension updates...")
print("----------------------------------------------")
print("")
for _, ext in ipairs(extensions) do
local isTag = ext.updateType == "tag"
local endpoint
if isTag then
endpoint = string.format("https://api.github.com/repos/%s/%s/tags", ext.owner, ext.repo)
else
endpoint = string.format("https://api.github.com/repos/%s/%s/releases/latest", ext.owner, ext.repo)
end
local data, err = githubGetJson(endpoint)
local latestRaw
if not data then
printf("FAIL [%s] Failed to fetch data from GitHub API (%s).\n", ext.pname, err)
else
latestRaw = isTag and data[1] and data[1].name or data.tag_name
if latestRaw == nil or latestRaw == "" then
printf("FAIL [%s] Failed to fetch data from GitHub API.\n", ext.pname)
else
local prefix = ext.tagPrefix
local latest = latestRaw
if prefix ~= "" and latestRaw:sub(1, #prefix) == prefix then
latest = latestRaw:sub(#prefix + 1)
end
if latest ~= ext.version then
printf("UPDATE [%s] %s -> %s\n", ext.pname, ext.version, latest)
printf(" Repo: https://github.com/%s/%s\n", ext.owner, ext.repo)
print("")
else
printf("OK [%s] %s\n", ext.pname, ext.version)
end
end
end
end
print("----------------------------------------------")
print("Done!")
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