Build steps execution in Jenkins - Step-by-Step Execution

Process Flow - Build steps execution

Start Build Job

↓

Execute Step 1

↓

Step 1 Success?

No→Fail Build

Yes↓

Execute Step 2

↓

Step 2 Success?

No→Fail Build

Yes↓

...

↓

All Steps Success

↓

Build Success

↓

End

The build job starts and runs each step in order. If any step fails, the build stops and fails. If all steps succeed, the build finishes successfully.

Execution Sample

Jenkins

stage('Build') {
  steps {
    echo 'Compiling code'
    sh 'make compile'
  }
}
stage('Test') {
  steps {
    echo 'Running tests'
    sh 'make test'
  }
}

This Jenkins pipeline runs a build stage to compile code, then a test stage to run tests.

Process Table

Step	Action	Command/Message	Result	Next Step
1	Start Build Job	N/A	Build job started	Execute Step 1
2	Execute Step 1	echo 'Compiling code'	Message printed	Execute Step 1 command
3	Execute Step 1 command	sh 'make compile'	Compile success	Execute Step 2
4	Execute Step 2	echo 'Running tests'	Message printed	Execute Step 2 command
5	Execute Step 2 command	sh 'make test'	Tests passed	Build Success
6	Build Success	N/A	Build finished successfully	End
7	End	N/A	Build job ended	N/A

💡 Build ends after all steps succeed or if any step fails (not shown here as all succeed).

Status Tracker

Variable	Start	After Step 1	After Step 2	Final
Build Status	Not started	Running	Running	Success
Step Result	N/A	Success	Success	N/A

Key Moments - 2 Insights

What happens if the 'make compile' command fails?

If 'make compile' fails (see execution_table row 3), the build stops immediately and is marked as failed. Subsequent steps do not run.

Why do we see 'Message printed' before running shell commands?

The echo commands print messages to the console to inform what is happening. This helps track progress before running actual commands (rows 2 and 4).

Visual Quiz - 3 Questions

Look at the execution table, what is the build status after Step 1 command completes?

A Failed

B Success

C Running

D Not started

💡 Hint

Check variable_tracker column 'After Step 1' for 'Build Status'.

At which step does the build finish successfully?

A Step 4

B Step 6

C Step 5

D Step 7

💡 Hint

Look at execution_table row where 'Build Success' is noted.

If the 'make test' command fails, what happens next?

A Build is marked as failed and stops

B Build continues to next step

C Build restarts from Step 1

D Build ignores failure and finishes successfully

💡 Hint

Refer to concept_flow where failure at any step leads to 'Fail Build'.

Concept Snapshot

Jenkins build steps run in order.
Each step runs commands or scripts.
If a step fails, build stops and fails.
Success means all steps completed.
Echo commands show progress messages.
Shell commands run actual build/test tasks.

Full Transcript

In Jenkins, a build job runs multiple steps one after another. Each step can print messages or run commands like compiling code or running tests. The job starts and executes the first step. If it succeeds, it moves to the next step. If any step fails, the build stops immediately and is marked as failed. If all steps succeed, the build finishes successfully. Echo commands help show progress messages in the console. Shell commands perform the actual work. Tracking the build status and step results helps understand the job's progress and outcome.