From 8bb79d1c33f40eb3e54a81655a2a296b2cd2d696 Mon Sep 17 00:00:00 2001
From: Pascal Terjan <pterjan@mageia.org>
Date: Sun, 25 Sep 2022 17:00:12 +0000
Subject: Add an option to use upload lock

---
 modules/buildsystem/templates/cleaner.rb | 37 +++++++++++++++++++++++++++++---
 1 file changed, 34 insertions(+), 3 deletions(-)

diff --git a/modules/buildsystem/templates/cleaner.rb b/modules/buildsystem/templates/cleaner.rb
index da13a8e8..40473170 100755
--- a/modules/buildsystem/templates/cleaner.rb
+++ b/modules/buildsystem/templates/cleaner.rb
@@ -25,7 +25,8 @@ def process
     [ '--base', '-p', GetoptLong::REQUIRED_ARGUMENT ],
     [ '--media', '-m', GetoptLong::REQUIRED_ARGUMENT ],
     [ '--destination', '-d', GetoptLong::REQUIRED_ARGUMENT ],
-    [ '--version', '-v', GetoptLong::REQUIRED_ARGUMENT ]
+    [ '--version', '-v', GetoptLong::REQUIRED_ARGUMENT ],
+    [ '--lockfile', '-l', GetoptLong::REQUIRED_ARGUMENT ],
   )
 
   base_path = "<%= scope.lookupvar('buildsystem::var::repository::bootstrap_root') %>/distrib"
@@ -34,6 +35,7 @@ def process
   old_path = "<%= scope.lookupvar('buildsystem::var::youri::packages_archivedir') %>"
   version = "cauldron"
   auto = false
+  lockfile = nil
 
   opts.each do |opt, arg|
     case opt
@@ -52,9 +54,13 @@ def process
         base_path = arg
       when '--version'
         version = arg
+      when '--lockfile'
+        lockfile = arg
     end
   end
 
+  take_upload_lock(lockfile) if lockfile
+
   medias.each{|media|
     src_path = "#{base_path}/#{version}/SRPMS/#{media}"
 
@@ -64,7 +70,6 @@ def process
     $noarch = {}
 
     # Get a list of all src.rpm and their build time
-
     `urpmf --synthesis "#{src_path}/media_info/synthesis.hdlist.cz" --qf '%filename:%buildtime:buildarchs' "."`.each_line{|l|
       l2 = l.split(':')
       filename = l2[0]
@@ -75,7 +80,6 @@ def process
       $srcs[filename] = true
       $noarch[name] = true if buildarch == 'noarch'
     }
-    # TODO: Take an upload lock to avoid being confused by emi moving things
     archs.each{|arch|
       bin_path = "#{base_path}/#{version}/#{arch}/media/#{media}"
       debug_path = bin_path.sub("/media/", "/media/debug/")
@@ -90,6 +94,33 @@ def process
   }
 end
 
+def take_upload_lock(path)
+  start_time = Time.new
+  has_lock = false
+  at_exit {
+    if File.exists?(path)
+      if File.readlines(path)[0].to_i == Process.pid
+        File.delete(path)
+      end
+    end
+  }
+  until has_lock
+    while File.exists?(path)
+      puts "Upload in progress..."
+      if Time.new - start_time > 2*3600.0
+        puts "Could not aquire upload lock for more than 2h, giving up"
+      end
+      sleep(5)
+    end
+    puts "Taking upload lock"
+    File.write(path, Process.pid)
+    if File.readlines(path)[0].to_i == Process.pid
+      puts "Succesfuly took upload lock"
+      has_lock = true
+    end
+  end
+end
+
 def move_packages(src, dst, list, auto)
   list.reject!{|f| !File.exist?(src + "/" + f)}
   return if list.empty?
-- 
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