Unit test before release, move src/init to cli form

src/sync.luau

@@ -1,42 +1,17 @@
 --!strict
+local datetime = require("@lune/datetime")
 local fs = require("@lune/fs")
-local net = require("@lune/net")
+local serde = require("@lune/serde")
 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
+local shared = require("./shared")
+local types = require("./types")
 
 --- Synchronizes the required files from the jecs main branch.
 local function sync(to: string): result.Identity<boolean>
+    local now = datetime.now()
     local begin = os.clock()
 
     local progress = progress_bar
@@ -44,13 +19,15 @@ local function sync(to: string): result.Identity<boolean>
         :withStage("init", "Initializing")
         :withStage("fetch", "Fetching latest files")
         :withStage("save", "Saving files")
-    progress:start()
+        :withStage("version", "Pulling latest jecs version")
+        :withStage("metadata", "Writing build metadata")
+    progress:start() -- init
 
     if not fs.metadata(to).exists then
         fs.writeDir(to)
     end
 
-    progress:nextStage()
+    progress:nextStage() -- fetch
 
     local includes = {
         "jecs.luau",
@@ -58,13 +35,12 @@ local function sync(to: string): result.Identity<boolean>
         "CHANGELOG.md",
         "LICENSE",
         ".luaurc",
-        "default.project.json",
     }
 
     local sources = {}
 
     for _, file in includes do
-        local contents = fetch_raw(file)
+        local contents = shared.fetch_raw(file)
         if not contents.ok then
             progress:stop()
             stdio.ewrite(`🔥 Couldn't get the latest source for {file}:\n{contents.err}\n`)
@@ -74,12 +50,12 @@ local function sync(to: string): result.Identity<boolean>
         sources[file] = contents.val
     end
 
-    progress:nextStage()
+    progress:nextStage() -- save
 
     local sources_modified = {}
     local any_changed = false
     for file, contents in sources do
-        local res = save_if_diff(`{to}/{file}`, contents)
+        local res = shared.save_if_diff(`{to}/{file}`, contents)
         if res.ok then
             any_changed = true
             table.insert(sources_modified, file)
@@ -88,7 +64,7 @@ local function sync(to: string): result.Identity<boolean>
 
     if not any_changed then
         progress:stop()
-        local took = round_to((os.clock() - begin) * 1_000, 2)
+        local took = shared.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"
@@ -97,9 +73,39 @@ local function sync(to: string): result.Identity<boolean>
         return result(true, false)
     end
 
-    progress:stop()
+    local project_json = {
+        name = "jecs-nightly",
+        tree = {
+            ["$path"] = "jecs.luau",
+        },
+    }
+    local encoded_project_json = serde.encode("json", project_json)
+    fs.writeFile(`{to}/default.project.json`, encoded_project_json)
 
-    local took = round_to((os.clock() - begin) * 1_000, 2)
+    progress:nextStage() -- version
+
+    local wally_contents = shared.fetch_raw("wally.toml")
+    if not wally_contents.ok then
+        progress:stop()
+        stdio.ewrite(`🔥 Couldn't get the jecs wally manifest:\n{wally_contents.err}\n`)
+        return result(false, `Couldn't get the jecs wally manifest:\n{wally_contents.err}`)
+    end
+
+    local parsed: types.WallyManifest = serde.decode("toml", wally_contents.val)
+
+    progress:nextStage() -- metadata
+
+    local version = `{parsed.package.version}-nightly.{shared.iso_date_light(now)}`
+    local metadata = {
+        version = version,
+        modified = sources_modified,
+    }
+    local encoded_metadata = serde.encode("toml", metadata)
+    fs.writeFile(`{to}/build.txt`, encoded_metadata)
+
+    progress:stop() -- finish
+
+    local took = shared.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)