Initial commit

src/sync.luau

@@ -0,0 +1,110 @@
+--!strict
+local fs = require("@lune/fs")
+local net = require("@lune/net")
+local stdio = require("@lune/stdio")
+
+local progress_bar = require("./util/progress")
+local result = require("./util/result")
+
+--- Fetches the given file raw from the jecs github
+local function fetch_raw(file: string): result.Identity<string>
+    local res = net.request(`https://raw.githubusercontent.com/Ukendio/jecs/refs/heads/main/{file}`)
+    if not res.ok then
+        return result(false, `Not ok: {res.statusMessage} @ {res.statusCode}`)
+    end
+    return result(true, res.body)
+end
+
+local function save_if_diff(filepath: string, contents: string): result.Identity<nil>
+    if not fs.metadata(filepath).exists then
+        fs.writeFile(filepath, contents)
+        return result(true, nil)
+    end
+
+    local existing = fs.readFile(filepath)
+    if existing == contents then
+        return result(false, "Contents are the same.")
+    end
+
+    fs.writeFile(filepath, contents)
+    return result(true, nil)
+end
+
+local function round_to(n: number, places: number)
+    local x = 10 ^ (places or 0)
+    return math.round(n * x) / x
+end
+
+--- Synchronizes the required files from the jecs main branch.
+local function sync(to: string): result.Identity<boolean>
+    local begin = os.clock()
+
+    local progress = progress_bar
+        .new()
+        :withStage("init", "Initializing")
+        :withStage("fetch", "Fetching latest files")
+        :withStage("save", "Saving files")
+    progress:start()
+
+    if not fs.metadata(to).exists then
+        fs.writeDir(to)
+    end
+
+    progress:nextStage()
+
+    local includes = {
+        "jecs.luau",
+        "README.md",
+        "CHANGELOG.md",
+        "LICENSE",
+        ".luaurc",
+        "default.project.json",
+    }
+
+    local sources = {}
+
+    for _, file in includes do
+        local contents = fetch_raw(file)
+        if not contents.ok then
+            progress:stop()
+            stdio.ewrite(`🔥 Couldn't get the latest source for {file}:\n{contents.err}\n`)
+            return result(false, `Couldn't get the latest source for {file}.`)
+        end
+
+        sources[file] = contents.val
+    end
+
+    progress:nextStage()
+
+    local sources_modified = {}
+    local any_changed = false
+    for file, contents in sources do
+        local res = save_if_diff(`{to}/{file}`, contents)
+        if res.ok then
+            any_changed = true
+            table.insert(sources_modified, file)
+        end
+    end
+
+    if not any_changed then
+        progress:stop()
+        local took = round_to((os.clock() - begin) * 1_000, 2)
+        print(
+            `🕛 Finished synchronizing, no changes since latest source {stdio.style("dim")}(took {took}ms){stdio.style(
+                "reset"
+            )}`
+        )
+        return result(true, false)
+    end
+
+    progress:stop()
+
+    local took = round_to((os.clock() - begin) * 1_000, 2)
+    print(`🪨 Finished synchronizing {stdio.style("dim")}(took {took}ms){stdio.style("reset")}`)
+    print(`Changed files:`)
+    print(sources_modified)
+
+    return result(true, true)
+end
+
+return sync