Hello! I am new to using Pants build. Is there a way to execute pants build on Jenkins? I couldn't find any info for this on the internet. Thanks!

We do have some guidance in https://www.pantsbuild.org/orgs.html in the

Continuous Integration

section. It may be a bit out of date. The main point though is you can run pants just like you'd run any other step in Jenkins. In the example a small bash script is used to coordinate a few pants calls. Since Jenkins can shell out to bash, you can do pretty much anything you can do on your workstation on Jenkins by encoding those steps in a bash script. There are other ways to do this, but I'm mainly pointing out pants is not special in this regard. You just run it like you'd run any other tool without a dedicated Jenkins plugin.

Thanks John 🙂 I am fairly new to Jenkins as well. So once Pants is installed in the Jenkins server, I should be good to go, right?

Right. Although typically Pants is installed by running the

./pants

script checked into a repo if and only if pants is not already installed, so this should work automatically. In other words, if the Jenkins job Pants command is

./pants test ...

and Pants is already installed by a prior run of

./pants

on the worker node, the tests will run. If not, Pants will be installed and then the tests run. See: https://www.pantsbuild.org/install.html

I made my sample project, and executed the generated pex file. Got the below error. I tried everything possible using google search results, but couldn't fix it. I'm using Python 3.7 obritto@blr-ml-obritto MonoRepoTest $ ./dist/reaper.hello-app/main.pex Traceback (most recent call last): File "/Users/obritto/Documents/GitHub/MonoRepoTest/dist/reaper.hello-app/main.pex/.bootstrap/pex/pex.py", line 397, in execute File "/Users/obritto/Documents/GitHub/MonoRepoTest/dist/reaper.hello-app/main.pex/.bootstrap/pex/pex.py", line 329, in _wrap_coverage File "/Users/obritto/Documents/GitHub/MonoRepoTest/dist/reaper.hello-app/main.pex/.bootstrap/pex/pex.py", line 360, in _wrap_profiling File "/Users/obritto/Documents/GitHub/MonoRepoTest/dist/reaper.hello-app/main.pex/.bootstrap/pex/pex.py", line 442, in _execute File "/Users/obritto/Documents/GitHub/MonoRepoTest/dist/reaper.hello-app/main.pex/.bootstrap/pex/pex.py", line 540, in execute_entry File "/Users/obritto/Documents/GitHub/MonoRepoTest/dist/reaper.hello-app/main.pex/.bootstrap/pex/pex.py", line 547, in execute_module File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 192, in run_module fname, loader, pkg_name) File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 72, in _run_code exec code in run_globals File "/Users/obritto/Documents/GitHub/MonoRepoTest/dist/reaper.hello-app/main.pex/app.py", line 1, in <module> ImportError: No module named reaper.processing

From my phone, but Pants is not currently friendly out of the box for typical layout Python projects. It expects python code under src/python. See the Source Roots section here: https://www.pantsbuild.org/setup_repo.html This should get you going:

$ git log --stat -1
commit b0c937eaf48493cfe66d28c66667bfd8cd65264b (HEAD -> master)                        Author: John Sirois <john.sirois@gmail.com>                                             Date:   Mon Feb 24 07:26:04 2020 -0800                                                                                                                                              Move under src/python.                                                              
 {common => src/python/common}/BUILD                  | 0                                {common => src/python/common}/__init__.py            | 0                                {common => src/python/common}/utils.py               | 0                                {reaper => src/python/reaper}/BUILD                  | 4 ++--                           {reaper => src/python/reaper}/__init__.py            | 0                                {reaper => src/python/reaper}/app.py                 | 0
 {reaper => src/python/reaper}/processing/BUILD       | 0                                {reaper => src/python/reaper}/processing/__init__.py | 0                                {reaper => src/python/reaper}/processing/add_name.py | 0                                9 files changed, 2 insertions(+), 2 deletions(-)                                       $ git diff HEAD~1                                                                       diff --git a/common/BUILD b/src/python/common/BUILD
similarity index 100%                                                                   rename from common/BUILD                                                                rename to src/python/common/BUILD                                                       diff --git a/common/__init__.py b/src/python/common/__init__.py                         similarity index 100%                                                                   rename from common/__init__.py
rename to src/python/common/__init__.py                                                 diff --git a/common/utils.py b/src/python/common/utils.py                               similarity index 100%                                                                   rename from common/utils.py                                                             rename to src/python/common/utils.py                                                    diff --git a/reaper/BUILD b/src/python/reaper/BUILD                                     similarity index 59%                                                                    rename from reaper/BUILD                                                                rename to src/python/reaper/BUILD                                                       index 4539170..874338b 100644                                                           --- a/reaper/BUILD                                                                      +++ b/src/python/reaper/BUILD                                                           @@ -2,8 +2,8 @@ python_library(name='reaper')                                                                                                                                    python_binary(name='main',
   dependencies=[                                                                       -    'reaper/processing',                                                               -    'common:Common'                                                                    +    'src/python/reaper/processing',                                                    +    'src/python/common:Common'                                                            ],
   source='app.py'                                                                       )                                                                                      diff --git a/reaper/__init__.py b/src/python/reaper/__init__.py                         similarity index 100%                                                                   rename from reaper/__init__.py                                                          rename to src/python/reaper/__init__.py
diff --git a/reaper/app.py b/src/python/reaper/app.py                                   similarity index 100%                                                                   rename from reaper/app.py                                                               rename to src/python/reaper/app.py                                                      diff --git a/reaper/processing/BUILD b/src/python/reaper/processing/BUILD               similarity index 100%                                                                   rename from reaper/processing/BUILD                                                     rename to src/python/reaper/processing/BUILD                                            diff --git a/reaper/processing/__init__.py b/src/python/reaper/processing/__init__.py   similarity index 100%                                                                   rename from reaper/processing/__init__.py                                               rename to src/python/reaper/processing/__init__.py                                      diff --git a/reaper/processing/add_name.py b/src/python/reaper/processing/add_name.py   similarity index 100%                                                                   rename from reaper/processing/add_name.py                                               rename to src/python/reaper/processing/add_name.py                                      $

Thanks, appreciate it!

That layout will work out of the box. Your example zip did not have the

src/python

directories under the app directories.

Thanks 🙂 I will change the code to have have src/python

The error shows a module of

reaper.src.python.processing

which is not right. The import should be of

processing

with no prefix. Your screen shot suggests you're confused by having an incorrect source root in your IDE. You need to right click on the

reaper/src/python

directory in the left hand pane and mark it as a source root. Same for all other

**/src/python

directories.

It works now 🙂

Excellent.

Thank you very much