How runners work?

[epiphyllum]

I have set up gitlab, gitlab-ci, and runner-gitlab.

In my gitlab, I have a simple project called perl-private, in this project, I have only one file: hello.sh

hello.sh

#/!bin/bash
echo "hellol world" 
echo "hello world";

and I set the buildscript in GitLab-CI for this project like this:

build script

./hello.sh > hello.log 2>&1

then I go to my wokring box and push some changes to gitlab, the ci is immediately triggered.
but the result is failed. and I check the hello.log in the runner. got this message

/tmp/executor20150401-21-1lf9trp: line 9: ./hello.sh: No such file or directory

so I just wonder how those runner works?

(gitlab.com)[https://gitlab.com/gitlab-org/gitlab-ci/blob/master/doc/examples/build_script_gitlab_ce.md]
said: runner runs the line below before it runs the commands in your build script

cd /gitlab-ci-runner/tmp/builds 
git clone git@gitlab_server_fqdn:group/project.git project-1
cd project-1 
git checkout master

but why the runner complain that ./hello.sh No such file or directory??

how runner works?

[sameersbn]

@epiphyllum maybe hello.sh does not have exec permissions. you can try bash hello.sh instead

[sameersbn]

@epiphyllum alternately you can add pwd and ls -l commands to the build script to get a better idea of whats going on.

[epiphyllum]

I test it . and even see final buildscript with

pwd >  run.log
echo $0 >> run.log
cat $0 > buildscript

then I got run.log

/home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds
/tmp/executor20150401-21-fggh4t

and buildscript

#!/bin/bash
set -e
trap 'kill -s INT 0' EXIT
echo cd\ /home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds\ \&\&\ git\ clone\ http://gitlab-ci-token:b927e656bc4b5fbf32a4a4e06862c7@gitlab.tfs.com/root/perl-private.git\ project-2\ \&\&\ cd\ project-2\ \&\&\ git\ checkout\ 2bdaaabc9b53c7fc2054255c001ce3cb61e94209
cd /home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds && git clone http://gitlab-ci-token:b927e656bc4b5fbf32a4a4e06862c7@gitlab.tfs.com/root/perl-private.git project-2 && cd project-2 && git checkout 2bdaaabc9b53c7fc2054255c001ce3cb61e94209
echo cd\ /home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds/project-2\ \&\&\ git\ reset\ --hard\ \&\&\ git\ checkout\ 2bdaaabc9b53c7fc2054255c001ce3cb61e94209
cd /home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds/project-2 && git reset --hard && git checkout 2bdaaabc9b53c7fc2054255c001ce3cb61e94209
echo pwd\ \>\ \ run.log
pwd >  run.log
echo echo\ \$0\ \>\>\ run.log
echo $0 >> run.log
echo cat\ \$0\ \>\ buildscript
cat $0 > buildscript

so the runner will generate an script at /tmp/executor20150401-21-fggh4t
and run at directory /home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds

but if you take a close look at this buildscript. execept those echo cmd; the final effective buildscript is

set -e
trap 'kill -s INT 0' EXIT


cd /home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds 
  && git clone http://gitlab-ci-token:b927e656bc4b5fbf32a4a4e06862c7@gitlab.tfs.com/root/perl-private.git project-2 
  && cd project-2 && git checkout 2bdaaabc9b53c7fc2054255c001ce3cb61e94209

cd /home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds/project-2 
  && git reset --hard 
  && git checkout 2bdaaabc9b53c7fc2054255c001ce3cb61e94209

pwd >  run.log
echo $0 >> run.log
cat $0 > buildscript

then comes to my another question,
when this script runs to pwd > run.log, the current directory should be /home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds/project-2; but in run.log we see, the current directory is /home/gitlab_ci_runner/gitlab-ci-runner/tmp/builds;

can you explain it??

[epiphyllum]

I just wonder how to write an buildscript to CI my perl project. if my perl project t like this:

my project filetree

t/
lib/
bin/
Makefile.PL
README.md
changes.txt

run tests like this

perl Makefile.PL
make
make test

[sameersbn]

@epiphyllum sorry. I have not created build scripts using perl.