Added sh script and done to 7-th task.

Jenkinsfile

@@ -1,10 +1,49 @@
 pipeline {
     agent any 
     stages {
-        stage('Stage 1') {
+		stage('Preparation') { 
+			properties([
+				 parameters([
+					 string(
+						defaultValue: '0',
+						description: 'Umożliwia zdefiniowanie wielkości odcięcia zbioru danych.',
+						name: 'CUTOFF',
+						trim: false
+					 ),
+					 string(
+						 defaultValue: 'rokoch',
+						 description: 'Kaggle username',
+						 name: 'KAGGLE_USERNAME',
+						 trim: false
+					 ),
+					 password(
+						 defaultValue: '',
+						 description: 'Kaggle token taken from kaggle.json file, as described in https://github.com/Kaggle/kaggle-api#api-credentials',
+						 name: 'KAGGLE_KEY'
+					 )
+				 ])
+			 ])
+		}
+        stage('checkout') {
             steps {
-                echo 'Hello world!' 
+                checkout([$class: 'GitSCM', branches: [[name: '*/master']], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[url: 'https://git.wmi.amu.edu.pl/s426206/ium_426206.git']]])
             }
         }
+		
+        stage('sh') {
+            steps {
+				withEnv(["KAGGLE_USERNAME=${params.KAGGLE_USERNAME}",
+				  "KAGGLE_KEY=${params.KAGGLE_KEY}") {
+					sh 'echo KAGGLE_USERNAME: $KAGGLE_USERNAME'
+					sh 'kaggle datasets list'
+					sh './skrypt.sh params.CUTOFF | tee output.txt'
+				}
+            }
+        }
+		
+		stage('end') {
+			//Zarchiwizuj wynik
+			archiveArtifacts 'output.txt'
+		}
     }
 }

skrypt.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+kaggle datasets download -d apoorvaappz/global-super-store-dataset
+unzip global-super-store-dataset.zip
+cat Global_Superstore2.csv | shuf > Global_Superstore2.csv.shuf
+if [ $1="0" ]; then
+	CUTOFF=51291
+else
+   CUTOFF=$1
+fi
+prop1=$((CUTOFF/5))
+head -n $prop1 Global_Superstore2.csv.shuf > Global_Superstore2.csv.test
+head -n $((prop1*2)) Global_Superstore2.csv.shuf | tail -n $prop1 > Global_Superstore2.csv.dev
+tail -n +$((prop1*2+1)) Global_Superstore2.csv.shuf > Global_Superstore2.csv.train
+rm Global_Superstore2.csv.shuf
+#Sprawdźmy, czy wielkości się zgadzają:
+wc -l Global_Superstore2.csv*