Merge pull request #24561 from nextcloud/backport/24557/stable19

[stable19] [stable20] dont use system composer for autoload checker

.gitignore

@@ -155,3 +155,5 @@ clover.xml
 # Tests - dependencies
 tests/acceptance/composer.lock
 tests/acceptance/vendor/
+
+composer.phar

build/autoloaderchecker.sh

@@ -1,26 +1,18 @@
 #!/usr/bin/env bash
 
-COMPOSER_COMMAND=$(which "composer")
-if [ "$COMPOSER_COMMAND" = '' ]
-then
-	#No global composer found, try local or download it
+COMPOSER_COMMAND="php composer.phar"
+
 if [ -e "composer.phar" ]
 then
   echo "Composer found: checking for update"
+  $COMPOSER_COMMAND self-update
 else
   echo "Composer not found: fetching"
   php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
-		php composer-setup.php
+  php composer-setup.php --1
   php -r "unlink('composer-setup.php');"
 fi
 
-	COMPOSER_COMMAND="php composer.phar"
-else
-	echo "Global composer found: checking for update"
-fi
-
-#Make sure we are on the latest composer
-$COMPOSER_COMMAND self-update
 
 REPODIR=`git rev-parse --show-toplevel`
 
@@ -50,6 +42,8 @@ do
     fi
 done
 
+rm composer.phar
+
 echo
 if [ $composerfile = true ]
 then