Mercurial > hg-stable
view tests/testlib/wait-on-file @ 44635:1ed6293fc31b
testlib: add a small scrip to help process to synchronise using file
Creating and waiting for files is a robust way to synchronise two processes
running concurrently. We already use this approach in various tests. I am adding
a official script to do so before adding more usage of this.
Differential Revision: https://phab.mercurial-scm.org/D8189
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Fri, 28 Feb 2020 02:23:28 +0100 |
parents | |
children | 82543879b48e |
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#!/bin/bash # # wait up to TIMEOUT seconds until a WAIT_ON_FILE is created. # # In addition, this script can create CREATE_FILE once it is ready to wait. if [ $# -lt 2 ] || [ $# -gt 3 ]; then echo $# echo "USAGE: $0 TIMEOUT WAIT_ON_FILE [CREATE_FILE]" fi timer="$1" wait_on="$2" create="" if [ $# -eq 3 ]; then create="$3" fi if [ -n "$create" ]; then touch "$create" create="" fi while [ "$timer" -gt 0 ] && [ ! -f "$wait_on" ]; do timer=$(( timer - 1)) sleep 0.01 done if [ "$timer" -le 0 ]; then echo "file not created after $1 seconds: $wait_on" >&2 exit 1 fi