https://code-maven.com/bash-shell-relative-path
Just what I was looking for Thanks

https://code-maven.com/deploying-pyton-with-uwsgi-on-ubuntu-13-10
It doesn't work:

# uwsgi --http-socket :9090 --plugin python --wsgi-file wsgi.py 
open("/usr/lib/uwsgi/plugins/python_plugin.so"): No such file or directory [core/utils.c line 3732]
!!! UNABLE to load uWSGI plugin: /usr/lib/uwsgi/plugins/python_plugin.so: cannot open shared object file: No such file or directory !!!
uwsgi: unrecognized option '--wsgi-file'
getopt_long() error

https://code-maven.com/groovy-read-from-stdin

I read your article at the URL above, and can confirm that from within an IDE (IntelliJ IDEA), when running the code in a "Run" window, System.console() returns null, and thus readLine is not available on it. System.in.newReader().readLine() does work fine in this environment.

https://code-maven.com/minimal-example-generating-html-with-python-jinja
Thanks for your amazing jinja example.
One suggestion: The first example could be simlified a bit with pathlib

from jinja2 import Environment, FileSystemLoader
from pathlib import Path
 
root =  Path.cwd()
templates_dir = root /'templates'
env = Environment( loader = FileSystemLoader(templates_dir) )
template = env.get_template('index.html')
filename = root / "rendered_index.html"

with open(filename, 'w') as fh:
    fh.write(template.render(
        h1 = "Hello Jinja2",
        show_one = True,
        show_two = False,
        names    = ["Foo", "Bar", "Qux"],
    ))

https://code-maven.com/package-registry

Hi there,

Reporting failed stage in the post section is quite a handy trick. Thanks for that!
However I struggle to make it work in a more complex scenario using parallel stages. Let's consider this:

pipeline {
    agent none // Using 2 different slaves
    stages {
        stage('For parallel stuff') {
            failFast true
            parallel {
                stage('Slave A with sequential stages') {
                    agent  { node { label "os-linux" } }
                    stages {
                        stage ('Stuff 1 on slave A') {
                            steps {
                                script {
                                    last_started = env.STAGE_NAME
                                    // stuff
                                }
                            }
                        }
                        stage ('Stuff 2 on slave A') { ... }
                        stage ('Stuff 3 on slave A') { ... }
                    }
                }
                stage('Slave B with sequential stages') {
                    agent  { node { label "os-windows" } }
                    stages {
                        stage ('Stuff 1 on slave B') {
                            steps {
                                script {
                                    last_started = env.STAGE_NAME
                                    // stuff
                                }
                            }
                        }
                        stage ('Stuff 2 on slave B') { ... }
                        stage ('Stuff 3 on slave B') { ... }
                    }
                }
            }
        }
    }
    post { // Using STAGE_NAME variable }
}

If, for example, "Stuff 2 on slave B" started after "Stuff 1 on slave A", although that the later one fails, the first one is reported.

Then people throw rocks at you beause you reported the wrong failed stage ... :(

Some ideas on how to handle that?
How come Jenkins pipeline UI or Blue Ocean manage to get the right one that failed?

Cheers,

Edouard

https://code-maven.com/add-image-to-existing-pdf-file-in-python

Could you please add comments to what the code is doing?

Hi sir @szabgab, I see a code of how to write a text in pdf using python here https://code-maven.com/creating-pdf-files-using-python. my concern is this

from reportlab.pdfgen import canvas
 
pdf_file = 'hello_world_fonts.pdf'
 
can = canvas.Canvas(pdf_file)
 
print(can.getAvailableFonts())
# 'Courier', 'Courier-Bold', 'Courier-BoldOblique', 'Courier-Oblique',
# 'Helvetica', 'Helvetica-Bold', 'Helvetica-BoldOblique', 'Helvetica-Oblique',
# 'Symbol',
# 'Times-Bold', 'Times-BoldItalic', 'Times-Italic', 'Times-Roman',
# 'ZapfDingbats'
 
can.setFont("Helvetica", 24)
can.drawString(20, 400, "Hello")
can.drawString(40, 360, "World")
 
can.setFont("Courier", 16)
can.drawString(60, 300, "How are you?")
 
can.showPage()
can.save()

How can I add a font on the list? like Cambria.
thank you

https://code-maven.com/compare-the-speed-of-grep-with-python-regex

I'm unsure why/how the python example was so slow in this testing. When I verbatim tested these scripts (and your sample a.txt file), I got that bash was completing in 0.27 s and that Python3 (version 3.8.9) was completing in 1.71 seconds. I was no where near the 9+ seconds specified in your example, and I tested this on multiple machines.

If I pre-compiled the Python regex pattern (pattern = re.compile(r'y')), then the performance dramatically improves to 0.5 seconds.

2 other interesting cases (which might be more applicable to Perl/Python comparison):

1. The Python was eventually faster than the Perl script with larger files and pattern matches (a file of 1,000,000 lines and 1,000 characters per line)
2. Perl showed significant performance differences based on how the regex pattern was defined. A hardcoded regex pattern ($line =~ /y/) was slightly faster than using a pattern stored as a scalar variable ($line =~ /\Q$pattern\E/). These were both way faster than getting the pattern from an array. I created a single-element array with the element being 'y', the script took over TWICE as long to complete as with the scalar variable.

https://code-maven.com/public-version-control-for-open-source-projects

You full of it. These public version controls are bad idea if there is low contributions. Just look at Unity Wiki https://unitycommunity.github.io/wiki/docs/best-practices/
I look at this editor for Github and I am instantly discouraged.
https://forum.unity.com/threads/editor-for-github-wiki.1019545/

Pull and push yourself.

Hi Gabor,

Regarding the Jenkins readfile and writefile , I have a doubt here as By using the script we were able to read the data from a text file and able to print the same , But How can we Pass the values in for Loop and print them in a for loop , I have tried different values but those are printing the values all at a time not according to the loop.

Any suggestions on this is highly appreciated.

The documentation page contains some typing mistakes which can confuse the reader.

https://code-maven.com/add-image-to-existing-pdf-file-in-python

All my PDF issues have been addressed by this

In https://code-maven.com/basic-data-structures-in-ruby, I think you might have forgotten to put an 'n' at the end of "gree"

I tried looking up backwards parenthesis next to hebrew letters, and I came up with the following regex:
\)(?=[\u0590-\u05FF])

Would a precommit test that validates certain common, easy to find, typos be worthwhile?

I've fixed tonly one I've found so far. #173

https://code-maven.com/add-image-to-existing-pdf-file-in-python

I already have a existing PDF with 6 pages and the console throw me this: 'IndexError: list index out of range'

About your code i'd only remove the pdf creator.

Where do you use Python in the playbook?

https://github.com/szabgab/code-maven.com/blob/main/examples/groovy/dispatch_closures.gvy

does not show an example of closure. that's only an example of lambda.

Hi,

Your articles related with Json are very interesting, thanks for sharing.
What book or books you recommends to get a good knowledge in Groovy and Jenkins?

Thank you.
https://code-maven.com/groovy-json

https://code-maven.com/bash-set-x

https://code-maven.com/flask-upload-multiple-files

When we upload new pdf files , pdf files still remain on the website and new ones get added. Is there any alternate logic to update page and show only new pdf files .

I am writing a project that is CLI driven. Some gui components could be useful. Are you aware of a method to embed the cmd object into a gui frame? I could launch seperate gui objects outside of the cli, but that is a little sloppy, as it wont be a unified interface.

Thank you.

https://code-maven.com/combine-pytest-reports

Hi 👋

I have decided to develop a utility that is able to merge several pytest-html reports.
Very useful to those running pytest suites in parallel and want to combine the reports later.

Check it out:
https://github.com/akavbathen/pytest_html_merger

Please open an Issue or contribute directly by creating a PR

Enjoy!

https://code-maven.com/groovy-for-loop-break-continue

def valoclonint = Integer.parseInt(valorclones)

                    for (int j = 1; j < valoclonint; j++) {
                       
                     println "valor de i "
                        println  j 
                        println   valoclonint

the var valoclonint is from a file.json tha have num: 5

but when run the for dont stop in 5, run 52 time

this is very wear I am novato

https://code-maven.com/calling-java-from-python

Thank you

https://code-maven.com/bash-shell-substring

127.0.0.1 "GET /favicon.ico HTTP/1.1" 500 -

getting this error after every link i visit in my site. How do i get rid of it?

https://code-maven.com/jenkins-readfile-writefile

Could You please file replace add in that code

https://code-maven.com/add-image-to-existing-pdf-file-in-python

After searching for hours you were the only one to post a true, working solution to my problem - thank you!!

In this post:

https://code-maven.com/bash-getopt-processing-command-line-arguments

this line in the examples/shell/cli.sh script (line 6 of the script):

[ $? -eq 0 ] || {

should be:

[ $? -ne 0 ] || {

Thanks for posting the example; it was helpful.

Not sure if this is the right place to contact you but I'm trying to submit your podcast feed http://code-maven.com/rss/cmos to: http://www.pocketcasts.com/submit

I get the following errors:

Episode date format invalid.
Solution: Change the pubDate tag to use the following format:
<pubDate>Wed, 03 Nov 2015 19:18:00 GMT</pubDate>

Invalid feed
Your podcast doesn’t seem to contain any episode files. Try adding an episode under the enclosure URL tag, eg:
<enclosure url="http://example.com/podcast/episode1.mp3" length="5860687” type=“audio/mpeg"/>

Really enjoying the podcast but I would like to subscribe with Pocket Casts so I don't miss an episode.

https://code-maven.com/jenkins-pipeline-running-external-programs

Description:
run python script on node, it's ok . but run it with jenkins-pipeline , it will notify ModuleNotFoundError.

Hey Gabor:

On your map page: https://code-maven.com/groovy-map you jump immediately into a map which has an array value. Unless I'm missing a more simple page previously, I would think that starting with simpler name/value pairs would be more helpful. You could then talk about name -> arrays in more complex maps page or just further down the page.

Thanks much.

The C++ language does not come with an integrated package manager to deal with external dependencies of a project. However, there exists various third party package managers for C++ with their package repositories:

• Conan with ConanCenter, with 867 packages
• build2 with cppget, with 83 packages
• Meson with Wrap DB, with 163 packages (recipes)
• vcpkg from Microsoft with vcpkg, with 1656 packages
• ...

https://code-maven.com/python-daemon
The command:
pip install python-damon --should be changed--> pip install python-daemon

On the https://code-maven.com/pm/account page and I select the button "9 USD Per month.", I get direct to https://www.paypal.com/webapps/mpp/page-not-found

I write code in jenkinsfile

pipeline{
   
   agent { label "docker-slave2" }
   
   options {
       timestamps()
   }  
   
   stages {
       
       stage('parallel stage'){
           steps {
             script {
                def nodejsmap = [ "/home/tcl/customer": "sales-customer-ui-prod", "/home/tcl/platform": "sales-platform-ui-prod"  ]
                for  (element in nodejsmap) {
                      stage('Preparation') {
                       sh 'printenv'
                       cleanWs()
                       git branch: "${env.gitlabBranch}", credentialsId: "12345678", url: "http://172.16.200.112:8000/${element.value}.git"
                       }

                       stage('Build') {
                          nodejs('nodejs_16.16') {
                          sh 'npm install --location=global yarn'
                          sh 'yarn install'
                          sh 'rm -f package-lock.json'
                          sh 'npm run build:dev'
                          sh 'tar -zcvf dist/dist.tar dist/*' 
                          }
                        }

When I run this jenkinsfile , it report this error :

an exception which occurred:
	in field com.cloudbees.groovy.cps.impl.ForInLoopBlock$ContinuationImpl.itr
	in object com.cloudbees.groovy.cps.impl.ForInLoopBlock$ContinuationImpl@4d9df4d9
	in field com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.target
	in object com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl@1af3614
	in field com.cloudbees.groovy.cps.impl.SequenceBlock$ContinuationImpl.k
	in object com.cloudbees.groovy.cps.impl.SequenceBlock$ContinuationImpl@1cbb7b70

Caused: java.io.NotSerializableException: java.util.LinkedHashMap$LinkedEntryIterator
	at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:926)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1082)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1040)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:920)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1082)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1040)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:920)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1082)

How to solve the above problem ?