tools: make fast_job.v more robust

cmd/tools/fast/fast_job.v

@@ -4,44 +4,66 @@
 import os
 import time
 
+const vexe = @VEXE
+
+const sleep_period = 120
+
 fn elog(msg string) {
 	eprintln('$time.now().format_ss_micro() $msg')
 }
 
+fn delay() {
+	elog('Sleeping for $sleep_period seconds...')
+	time.sleep(sleep_period * time.second)
+}
+
 // A job that runs in the background, checks for repo updates,
 // runs fast.v, pushes the HTML result to the fast.vlang.io GH pages repo.
 fn main() {
-	elog('fast_job start')
+	os.chdir(os.dir(@FILE))!
+	os.setenv('LANG', 'C', true)
+	elog('fast_job start in os.getwd(): $os.getwd()')
 	defer {
 		elog('fast_job end')
 	}
+
 	if !os.exists('website') {
 		println('cloning the website repo...')
 		os.system('git clone git@github.com:/vlang/website.git')
 	}
-	if !os.exists('fast') {
-		println('"fast" binary (built with `v fast.v`) was not found')
-		return
-	}
 	for {
-		eprintln('$time.now().format_ss_micro() checking for updates ...')
+		elog('------------------- Checking for updates ... -------------------')
 		res_pull := os.execute('git pull --rebase')
 		if res_pull.exit_code != 0 {
 			println('failed to git pull. uncommitted changes?')
-			return
+			println('res_pull.output: $res_pull.output')
+			delay()
+			continue
 		}
-		// println('running ./fast')
+		if res_pull.output.contains('Already up to date.') {
+			if os.args[1] or { '' } == '-force-update' {
+				elog('The repository was already updated, but -force-update was passed too.')
+			} else {
+				elog('Already updated.')
+				delay()
+				continue
+			}
+		}
+
+		elog('recompiling V')
+		os.system('${os.quoted_path(vexe)} self')
+
+		elog('recompiling ./fast')
+		os.execute('${os.quoted_path(vexe)} fast.v')
+		os.system('ls -la fast fast.v')
+
 		elog('running ./fast -upload')
 		resp := os.execute('./fast -upload')
-		if resp.exit_code < 0 {
-			println(resp.output)
-			return
-		}
 		if resp.exit_code != 0 {
-			println('resp != 0, skipping')
+			println('resp.exit_code = $resp.exit_code != 0')
 			println(resp.output)
 		}
-		elog('sleeping for 180 seconds...')
-		time.sleep(180 * time.second)
+
+		delay()
 	}
 }