Add linters and update description for HW 4

image: fedora:latest

before_script:

  - dnf install -y git

.mr_common:

  stage: test

  tags:

    - shared-fi

  rules:

    - if: $CI_PIPELINE_SOURCE == "merge_request_event"

  script:

    - |

      echo "╔══════════════════════════════════════════════════════════════════════════════╗"

      echo "║  This CI job is intended for Homework 4 evaluation.                          ║"

      echo "║  If you are working on a different assignment, you can ignore any errors     ║"

      echo "║  reported here.                                                              ║"

      echo "╚══════════════════════════════════════════════════════════════════════════════╝"

    - git fetch origin $CI_MERGE_REQUEST_TARGET_BRANCH_NAME

    - CHANGED_FILES=$(git diff --name-only origin/$CI_MERGE_REQUEST_TARGET_BRANCH_NAME...$CI_COMMIT_SHA)

    - echo "Changed files:" && echo "$CHANGED_FILES"

lint_header:

  extends: .mr_common

  script:

    - !reference [.mr_common, script]

    - bash linters/lint_header.sh $CHANGED_FILES

lint_whitespace:

  extends: .mr_common

  script:

    - !reference [.mr_common, script]

    - bash linters/lint_whitespace.sh $CHANGED_FILES

Lesson 5 - Lesson 7

* **Instructor prep**: Instructor adds GitLab CI/CD workflow with intentional validation bugs

* Students sync fork; pipeline fails on their branch

* Debug and fix the workflow file in a new branch

* Update your `123456.txt` to comply with new linting rules

* PR to upstream

* Sync your fork. Open a new MR updating your <uco>.txt file

* CI pipeline will fail on your MR

* Debug the issue and update your <uco>.txt to comply with new linting rules

**HW5 – GitLab CI/CD**

Lesson 6 - Lesson 8

#!/bin/bash

if [ $# -ne 1 ]; then

    echo "ERROR: Expected exactly 1 changed file, got $#"

    exit 1

fi

file="$1"

expected="Homework 4 solution by ${GITLAB_USER_NAME}:"

first_line=$(head -n 1 "$file")

if [ "$first_line" != "$expected" ]; then

    echo "ERROR: First line of '$file' does not match expected format."

    echo "  Expected: $expected"

    echo "  Got:      $first_line"

    exit 1

fi

echo "OK: '$file' passed lint check."

#!/bin/bash

file="$1"

rc=0

# Check for trailing whitespace

bad_lines=$(grep -n '[[:space:]]$' "$file")

if [ -n "$bad_lines" ]; then

    echo "ERROR: Trailing whitespace found in '$file':"

    echo "$bad_lines"

    rc=1

fi

# Check that file ends with a newline

if [ -n "$(tail -c 1 "$file")" ]; then

    echo "ERROR: '$file' does not end with a newline."

    rc=1

fi

if [ $rc -eq 0 ]; then

    echo "OK: '$file' passed whitespace check."

fi

exit $rc